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WPO201500034 Plan - Stormwater Erosion Control Plan 2015-07-14
GENERAL NOTES OWNER SM CHARLOTTESVILLE LLC Sheet Title 11117 SUNSET HILLS RD, COVER SUITE 200 EXISTING CONDITIONS RESTON, VA 20190 TAX MAP # 093A5-00-00-00100 (LOTS 9-16) 093A5-K2-OB-00100 (LOT 1) EROSION & SEDIMENT CONTROL PLAN AREA: 48.65 AC. AREA: 1.285 cc. EROSION & SEDIMENT CONTROL PLAN ZONING. PRD ZONING: PRD EROSION & SEDIMENT CONTROL DETAILS & CALCULATIONS 093A5-1<2-OB-00700 (LOT 7) 093A5-K2-OB-00800 (LOT 8) STORMWATER MANAGEMENT PLAN AREA: 0.783 ac. AREA: 0.873 ac. STORMWATER MANAGEMENT DETAILS & CALCULATIONS ZONING. PRD ZONING: PRD ENGINEER: COLLINS ENGINEERING DITCH PROFILES& CALCULATIONS 200 GARRETT STREET, SUITE K DEPTH OF EC-JA DITCH CHARLOTTESVILLE, VA 22902 PROPOSED CONTOUR TELEPHONE. (434)987-1631 240.55 FAX.• (434) 245-OJOO CONTACT- SCOTT COLLINS, P.E. TBC DENOTES TOP /BACK OF CURB EMAIL: SCOTT@COLLINS-ENGINEERING.COM USE: SINGLE-FAMIL Y RESIDENTIAL SUBDIVISION STREETS: ROADSIDE DITCH TOPOGRAPHY JAMES H BELL JR, PC (USGS DA TUM) < z DATE OF PHOTOGRAPHY - FEBRUARY 22, 1998 DATE OF COMPILA TION - MARCH 12, 1998 S E ROUDABUSH, GALE& ASSOCIATES AS-BUILT CONDITIONS FROM GLENMORE PERIMETER ROAD AS-BUILD ROAD AND UTILITY 1 PLANS - CARROLL CREEK ROAD AND FARRINGDON ROAD PLANS DATED APRIL 4, 2008. TOPOGRAPHY VERIFIED WITH FIELD SURVEY ON JULY 7, 2014 BY ROUDABUSH, GALE & 414,- A SSOCIA TES. VEGETATION: ROLLING GRASS FIELD WITH EXISTING TREES 0" 'LAN 'PAP 93A,,5--K2--0A-5 GREGORY, tj, RRY F OR AV DOROTHY 1,1 4,01 ac. LOT 16 DB 4 PG 740 IINIP 93A5-1 W i CHARLOYTESVILLE U-0 48.65 lip LOT 15 ` LOT 13 LOTS 9-16 LOT 12 (APPROVED FOR I ( Al CONSTRUCTION) EXISTING SUBDIVIDED LOTS 7 & 8 APPROVED FOR CONSTRUCTION � :0 0°0.00 \ 16 dQ1 *0, 15 UP 'UP IWO SECT 0 DB 4T37 PC) 3`21-328 (PLArj EXISTING *01k SUBDIVIDED LOT I APPROVED FOR CONSTRUCTION TNIP 9415A3 RICHARD E. OR STAGY A. AUS rIN 2120 aa DB 4,562, PG, '187 SHEET U►YOUT SCALE.- 111 = 200' I LOT 11 LOT 10 SAN a ;VICH D E VEL L 0 P M i_:. N" T' L C 4. 1 TNIP Ll. IMP LOT 9 --V --LOPMENT W NI xL; Y, ROGER OR SAI R \Y DB 4616' P%3. 5_20 TMP93A5-K2-0A'13 EOu rrY TRUST (: "X) ASS CU'1,31'001ATI SCOT SANSOVICH IR 21.00 ae DB 4294 PG 7,14 or-- kOl.".'URR�t:NT OWN�Li D�LVELOPER ENGINEER ROADS A Sheet Number Sheet Title I COVER 2 EXISTING CONDITIONS 3 EROSION & SEDIMENT CONTROL NARRATIVE & DETAILS 4 EROSION & SEDIMENT CONTROL PLAN 5 EROSION & SEDIMENT CONTROL PLAN 6 EROSION & SEDIMENT CONTROL DETAILS & CALCULATIONS 7 STORMWATER MANAGEMENT PLAN 8 STORMWATER MANAGEMENT DETAILS & CALCULATIONS 9 STORMWATER MANAGEMENT DETAILS & CALCULATIONS 10 DITCH PROFILES& CALCULATIONS O DEPTH OF EC-JA DITCH 200 PROPOSED CONTOUR EC-2 DI TCH 240.55 PROPOSED SPOT ELEVATION L11 TBC DENOTES TOP /BACK OF CURB kD TAB DENOTES TOP OF BOX DEPTH OF EC-2 DITCH U -C 0 '0 < z LLJ 0 >' S E 0" 'LAN 'PAP 93A,,5--K2--0A-5 GREGORY, tj, RRY F OR AV DOROTHY 1,1 4,01 ac. LOT 16 DB 4 PG 740 IINIP 93A5-1 W i CHARLOYTESVILLE U-0 48.65 lip LOT 15 ` LOT 13 LOTS 9-16 LOT 12 (APPROVED FOR I ( Al CONSTRUCTION) EXISTING SUBDIVIDED LOTS 7 & 8 APPROVED FOR CONSTRUCTION � :0 0°0.00 \ 16 dQ1 *0, 15 UP 'UP IWO SECT 0 DB 4T37 PC) 3`21-328 (PLArj EXISTING *01k SUBDIVIDED LOT I APPROVED FOR CONSTRUCTION TNIP 9415A3 RICHARD E. OR STAGY A. AUS rIN 2120 aa DB 4,562, PG, '187 SHEET U►YOUT SCALE.- 111 = 200' I LOT 11 LOT 10 SAN a ;VICH D E VEL L 0 P M i_:. N" T' L C 4. 1 TNIP Ll. IMP LOT 9 --V --LOPMENT W NI xL; Y, ROGER OR SAI R \Y DB 4616' P%3. 5_20 TMP93A5-K2-0A'13 EOu rrY TRUST (: "X) ASS CU'1,31'001ATI SCOT SANSOVICH IR 21.00 ae DB 4294 PG 7,14 or-- kOl.".'URR�t:NT OWN�Li D�LVELOPER ENGINEER ROADS A VICINITY MAP SCALE: 1" = 2000' SHEET INDEX Sheet Number Sheet Title I COVER 2 EXISTING CONDITIONS 3 EROSION & SEDIMENT CONTROL NARRATIVE & DETAILS 4 EROSION & SEDIMENT CONTROL PLAN 5 EROSION & SEDIMENT CONTROL PLAN 6 EROSION & SEDIMENT CONTROL DETAILS & CALCULATIONS 7 STORMWATER MANAGEMENT PLAN 8 STORMWATER MANAGEMENT DETAILS & CALCULATIONS 9 STORMWATER MANAGEMENT DETAILS & CALCULATIONS 10 DITCH PROFILES& CALCULATIONS EXISTING CONTOUR DEPTH OF EC-JA DITCH 200 PROPOSED CONTOUR EC-2 DI TCH 240.55 PROPOSED SPOT ELEVATION L11 TBC DENOTES TOP /BACK OF CURB kD TAB DENOTES TOP OF BOX DEPTH OF EC-2 DITCH U -C 0 '0 < z LLJ 0 >' S E 1.2 1 jpp CL 0 414,- Qm Havam > 0 0 00 0 a) > O W L9 Twwi cl,r� w LLJ E Q 0 z U0 0 W 2) a N z 10ampok U VICINITY MAP SCALE: 1" = 2000' SHEET INDEX Sheet Number Sheet Title I COVER 2 EXISTING CONDITIONS 3 EROSION & SEDIMENT CONTROL NARRATIVE & DETAILS 4 EROSION & SEDIMENT CONTROL PLAN 5 EROSION & SEDIMENT CONTROL PLAN 6 EROSION & SEDIMENT CONTROL DETAILS & CALCULATIONS 7 STORMWATER MANAGEMENT PLAN 8 STORMWATER MANAGEMENT DETAILS & CALCULATIONS 9 STORMWATER MANAGEMENT DETAILS & CALCULATIONS 10 DITCH PROFILES& CALCULATIONS NOTE: EXCERPTS FROM THE ORIGINALLY APPROVED WPO PLAN FOR LOTS 1-16 (SHEETS 5 & 10) HAVE BEEN AFFIXED TO THE BACK OF THIS SET OF PLANS FOR THE ILLUSTRATION OF THE CULVERT & DITCH DESIGNS. LEG EXISTING CULVERT ... . ... EARTH DITCH CUL VERT It DRIVE WA Y CULVERT DROP INLET & STRUCTURE NO. 0 BENCH MARK CURB * z CLEARING LIMITS CURB & GU TTER -r- -- Ln LLJ PROPOSED PA VEMEN T Uj _j VDOT STANDARD STOP SIGN EC-JA DI TCH -- - - - - -- 200-- - - - - -- EXISTING CONTOUR DEPTH OF EC-JA DITCH 200 PROPOSED CONTOUR EC-2 DI TCH 240.55 PROPOSED SPOT ELEVATION L11 TBC DENOTES TOP /BACK OF CURB kD TAB DENOTES TOP OF BOX DEPTH OF EC-2 DITCH U APPROVED by the Albemarle County Community Development Department Date 'T Qp';' SCOT' R. COLLINSt?,' No, 35791 L�' S'-(OXAL 9— CY5 U4) L11 z LU It n 0 ,n 0 z z D 0 U W) Ln LLJ _j Uj _j zz 0 0 < ne < 0 U) z Uj M _j < w C\1 LU L11 U) kD CL all U -C 0 '0 < z LLJ 0 >' CY5 U4) L11 -0 C: It n -4 ,n m z W W cy) It w U 06 0 Ld 7 U0 LLI K w C\1 LU CY5 U4) -0 C: It .0 00 z W W cy) It w U 06 0 Ld 7 U0 LLI K w C\1 LU 9) CD 0z LLJ 0 U) C\j C\j kD z _j _j U -C 0 '0 < z LLJ 0 >' > 1.2 CL 0 w Qm Havam > 0 0 00 0 a) > O W L9 Twwi cl,r� w LLJ E Q 0 z U0 0 W 2) a N z 10ampok U 0 < 0 lu Uj r r% -0 C: UI LU .0 z W W W 0 Ld LU F_ cc 0 U CO LLJ 0 >' 1.2 CL 0 LU cc: > 0 0 0 < x U C:) C:) E Q a E E M C\1 (3 0 a N z Uj E 0 V) Uj r r% Uj JOB NO. 102054 SCALE AS NOTED U) SHEET NO. / / - - ! --------- - I - - --- ------------ I 71- r , I . 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THE PURPOSE OF THIS LAND DIS77JRBING AC77V7TY IS TO DEVELOP LOTS 1 & 7-16 WTHIN THE GLENMORE I ,ell_, L__7-___:-__.:��--j EXIS77NG CULVERT AND SEDIMENT CONTROL PRAC77CES WLL BE CONS7RUC7ED AND EROSION AND SMMENT CQNZROL MEASURF,5,�- �P_ I I CUL VER T STRUCTURAL PRACTICES USED IN THIS SECT70N CONSIST OF THE FOLLOWING. MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIRCARONS OF I T IS A N 77CIPA TEO TO USE CONS 7RUC 77ON EN 7RANCES, DI VERSION DIKES, EXIS TING SEDIMEN T BA SINS, NEIGHBORHOOD. THE TOTAL AREA TO BE DIS77JRBED WTH THIS PHASE OF DEVELOPMENT IS 9.80 ACRES. THE I 3.01 SAFETY FENCE THE WRGINIA EROSION AND SEDIMENT CONZROL HANDBOOK AND VIRGINIA AND SILT FENCES MLL BE INSTALLED TO CON7ROL SURFACE DRAINAGE. TEMPORARY SEEDING WLL DEVELOPMENT INCLUDES INSTALLA77ON OF WATER AND SEWER UTIL177ES TO THE LOTS, GRADING, EROSION & SCOT R. COLLINS% DROP INLET & STRUCTURE NO. A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL REGULA 77ONS VR 6 i 25-02-00 EROSION AND SEDIMENT CON7ROL BE USED IMMEDIA7ELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE SEDIMENT CONTROL, AND STORMW47ER MANAGEMENT 0 f.� A MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CON7ROL MEASURE BY REGULA TONS. i: EXISTING S17-E CONDITIONS. U No. 35791 "I.,." CURB THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH ES-2. THE PLAN APPROWNG AUTHORITY MUST BE N077FIED ONE WEEK PRIOR TO AREAS NLL BE MAINTAINED FROM TOPSOIL THAT WLL BE STRIPPED FROM AREAS TO BE GRADED THIS EXIS77NG SITE IS MOSTLY WOODED, SLOPING DOWNWARD TO 7HE NORTH WEST 7HE S17E IS LOCATED TO YO qf,415 .,(�- CAN BE CONSIDERED UNSAFE BY WRTUE OF POTEN77AL ACCESS BY 7HE PUBLIC. THE PRE-CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON S17E AND SHALL BE THE NORTH EAST OF' CARROLL CREEK ROAD AND DRAINS TO 774E EXIS77NG CARROLL CREEK. I CURB & GU TIER COMMENCEMENT OF LAND DIS77JRBING ACTIWTY AND ONE WEEK PRIOR TO STABILIZED NTH A 7EMPORARY VEGETA77VE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ADJACENT AREAS. . 1:",.:::..�,::::..""""�':',�.'�,.,..�"::..":::.,�.*::.,�"".:::,�.,,,:�.�:,7."-,.,�--"-.-.,.], 3.02 CONSTRUCTION ENTRANCE, THE FINAL INSPECTFON. ALL AREAS WHICH KILL NO LONGER BE EXCAVATED AND WHERE CONS7RUCTION AC77W77ES HAVE THIS SITE IS BORDERED TO THE NORTH BY AN EXIS77NG STREAM. TO THE EAST AND WEST EXISTS OPEN IONAL __ --- ��,,_, PROPOSED PA VEMENT A STABILIZED PAVED CONS7RUCTFON EN7RANCE W7H A WASH RACK LOCATED AT ES-3.ALL EROSION AND SEDIMENT CONTTOL MEASURES ARE TO BE PLACED PRIOR CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL GRASS FIELDS. CARROLL CREEK ROAD EXISTS TO THE. SOUTH. POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONS7RU`C770N 517E: TO REDUCE TO OR AS THE FIRST S7EP IN CLEARING. BE LEFT DORMANT FOR A YEAR OR MORE. SELEC77ON OF SEED MIX7URE NLL DEPEND ON THE 77ME OFFSITE LAND DISTURBANCE.- . i EC-JA DITCH 7HE AA40UNT OF MUD TRANSPOR7ED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES ES-4. A COPY OF 774E APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL . OR RUNOFF. CONS7RUC71ON EN7RANCES SHALL BE INSTALLED AS SHOMV ON THE BE MAINTAINED ON THE S17E AT ALL 77MES. OF YEAR APPLIED., NO OFFS17E LAND DISTURBANCE IS PROPOSED. ALL LAND DISTURBANCE IS TO OCCUR W77-IIN 774E LIMITS OF DEPTH OF EC-JA DITCH PLANS TO REDUCE THE AMOUNT SEDIMENT 7RANSPORTSD ONTO PUBLIC ROADWAYS. ES-5.*PRIOR TO COMMENCING LAND DISTURBING AC77VITIES IN AREAS OTHER 77-IAN TFMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT DISTURBANCE AS SHOWN. A 3.05 SILT FENCE, INDICATED ON 7HESE PLANS (INCLUDING BUT NOT LIM17ED TO, OFF-S17E FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED NTH FAST GERMINA77NG CRITICAL -AREAS. Ln . I EC-2 DITCH A 7EMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYNTHE77C FILTSR FABRIC BORROW OR WASTE AREAS), THE CONMACTOR SHALL SUBMIT A VEGETA 77ON IMMEDIA 7EL Y FOLLOWNG GRADING OF THOSE AREAS. SELEC77ON OF SEED MIX7URE NLL NO DISTURBANCE SHALL OCCUR WTHIN THE 100' S7REAM BUFFER LOCATED TO 77-IE NORTH OF MIS PROJECT 1-4 S7RETCHE0 ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND EN7RENCHED, TO SUPPLEMENTARY EROSION CON7ROL PLAN TO THE OWNER FOR REWEW AND DEPEND ON THE 77ME OF YEAR APPLIED SOILS. ;5� DEP77-1 OF EC-2 DITCH W7ERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING APPROVAL BY THE PLAN APPROWNG AUTHORITY CONSTRUCRON ENTRANCE SOILS MAP IS INCORPORATED INTO THE EROSION CONTTOL PLANS W77-1 SOILS DATA INCLUDED WTH THIS i:�_ I !�e 0 ( C0NS7RUC770N OPERA 77ONS IN ORDER TO PREVENT SEDIMENT FROM LEA WNG THE S17E; ES-6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLA77ON OF ANY ADD177ONAL A STABILIZED PAVED CONS7RUCTFON ENTRANCE NTH A WASH RACK LOCATSD AT POINTS OF NA RRA 77 VE. I Uj EARTH DITCH AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW-TO-MODERATF LEVEL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND VEHICULAR INGRESS AND EGRESS ON A C0NS7RUC77ON S17E, TO REDUCE TRE AMOUNT OF MUD SEQUENCE OF CONSTRUCTION. X �_ -.--- - co CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF SEDIMENTA770N AS DE7ERMWED BY THE PLAN APPROVING AUTHORITY TTANSPORTSD ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. 1. NOTIFY ALBEMARLE COUNTY TO SCHEDULE A PRECONS7RUC77ON MEE77NG AS REQUIRED. a A DRI VE WA Y CUL VER T AREAS NTH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW ES-7.-ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL i2 U, f2 EM CONSTRUC77ON ENTRANCES SHALL BE INSTALLED AS SHOWN ON 7HE PLANS TO REDUCE THE 2. NO EROSION CONTROL MEASURES MA Y BE REMOVED DURING 7HE CONS7RUCTION PROCESS WITHOUT THE W AS INDICA 7ED. 7HEY SHALL BE WSPECTSD IMMEDIA 7EL Y AF7FR EACH RAINFALL AND MEASURES AT ALL 77YES DURING LAND DISTURBING AC77VITIES AND DURING Z U_ ;Z APPROVAL FROM T14E INSPECTOR ON 77-IE PROJECT LU (D UJ BENCH MARK MAINTAINED IN ACCORDANCE NTH 7HE 14RGINIA EROSION & SEDIMENT CONTROL SITE DEVELOPMENT UNTIL FINAL STABILIZA77ON IS ACHIEVED. AMOUNT SEDIMENT 7RANSPORTED ONTO PUBLIC ROADWAYS. 3. INSTALL 7HE CONS7RUC77ON EN7RANCE WTH WASH AREA AS SHOWN ON THE PLANS. INSTALL 7EWPORARY 2: Z 2: HANDBOOK (VESCH). ES-8. DURING DEW4 TERING OPERATIONS, WATER WILL BE PUMPED INTO AN SIL T FENCE: 2: 2: * 15" CMP CULVERT BENEA77-1 CONSTRUC77ON ENTRANCE AS SHOWN ON THE PLANS. CONSTRUC77ON 0 re W 0 - - - - - CLEARING LIMITS 3.07 STORM DRAIN INLET PROTEC770N. APPROVED W47ER FIL7ERING DEVICE. A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYNTHE77C nL7ER FABRIC S7RETCHED ACROSS ENTRANCES TO BE INSTALLED WHERE CONSTRUC77ON VEHICLE ROUTSS IN7ERSECT PAVED PUBLIC ROADS, Z U Uj U ES-9.' THE CON7RACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES AND ATTACHED TO SUPPOR77NG POSTS AND EN7RENCHED. TO INTERCEPT AND DETAIN SMALL 0 �- Z LD A SEDIMEN T RL TER OR A N EXCA VA TED IMPOUNDING A REA A ROUND A S TORM DRA IN PROWSIONS SHALL BE MADE TO MINIMIZE THE 7RANSPORT OF SEDIMENT BY (VEHICULAR) 7RACKING ONTO P-4 Z Sa PERIODICALLY AND AFTER EACH RUNOFF-PRODUCING RAINFALL EVENT E Z 0 VDOT STANDARD S TOP SIGN DROP INLET OR CURB INLET TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONS7RUCT7ON OPERA 77ONS IN ORDER TO THE PAVED SURFACE WHERE SEDIMENT IS 7RANSPOR7ED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL �2 ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFEC77VENESS SYS7EMS PRIOR TO PERMANENT STABILIZA77ON OF THE DISTURBED AREA. INLET ' OF THE EROSION CON7ROL DEWCES SHALL BE MADE IMMEDIA7ELY PREWNT SEDIMENT FROM LEA WNG 7HE 517E. TO DECREASE THE VELOCITY OF SHEET FLOWS AND BE CLEANED THOROUGHLY AT THE END OF EACH DAY SEDIMENT SHALL BE REMOVED FROM 77-IE ROADS BY U r Ul EXIS77NG CONTOUR PR07EC77ON APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERA 77ONAL �. I 1. - I I.. I - � . � I . I..., . I .- . I . .. . LOW- TO-MODERA TF LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SHOVELING OR SWEEPING AND 77?ANSPOR77NG TO A SEDIMENT CON7ROL DISPOSAL AREA. STREET WASHING Ln a- Uj " Z . 1. . I , . . . . , I . I . LU _j i� .C- (D BEFORE PERMANENT STABILIZA 77ON Or THE CORRESPONDING DIS7URBED DRAINAGE AREA. ... I General construction notes for Erosion and Sediment. Control 013as . . . I � . . . - FROM SHEET FLOW AS -/ U) c < D Z I - , , SLOPE OF AREAS WTH MINIMAL GRADES TO F7L7ER SEDIMENT LADEN RUNOFF R. 200 PROPOSED CONTOUR .. I I . � I 1� 1. �'. I 1. I I .. I I.- .... � I � I . I I I 11, . SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN 77 IS MANNE r 0 U3 � I . � I � , . I 11 � .1 . .1 I . Z - . I .. I . � 11 . I I I : INDICA7ED. THEY SHALL BE INSPECTED IMMEDIA7ELY AF7ER EACH RAINFALL AND MAINTAINED IN 4. INSTALL THE IN177AL CONS77?UC7ION MEASURES AS SHOWN ON THE EROSION CON7ROL SHEETS. THIS U 3.09 TEMPORARY DIVERSION DIKE: . I I ., � 1, I . . � . 1. � . . I Z 0 Z LU LU I i � , I I .. � . 11- The -plan approving, authority must be notified one week, prior to the pre-coostruction I . I � INCLUDES SILT FENCE AND 2 SEDIMENT BASINS. MEASURES IN7ENDED TO TRAP SEDIMENT SHALL BE �: A TEMPORARY RIDGE OF COMPACTED SOIL CONS7RUC7ED AT THE TOP OR BASE OF A I I.. , � I .. .1 .1 � � . ACCORDANCE W77-/ THE WRGINIA EROSION & SEDIMENT CON7ROL HANDBOOK (VESCH). (n , 240�55 PROPOSED SPOT ELEVA 77ON SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE � .�. � . conference, one week.prior to the commencement of 'land disturbing activity, andoneweek . � 1-4 _j . 1. I ,� I. � I . I I- -1 . I . PERMANENT STABILIZA 770N. CONS7RUC7ED AS A FIRST S7EP KITH ANY LAND DISTURBANCE AC77WTY AND SHALL BE MADE FUNC77ONAL 2� < < =) I . I . I I I I . . . � . I . � I . . I 1, prior tQthe final inspec., on. 1. . . . 1. I . . . 1. . . BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE . 2: U I--,' TRC DEN07ES TOPIBACK OF CURB AREAS AWAY FROM UNPROTTC7ED DISTURBED AREAS AND SLOPES TO A STABILIZED . I ti, I I - I cj� 0 1 1 1 . I I � I .1 � I 774E ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PLAN71NG SEED. M 0� Uj LU TAB DENO TES TOP OF BOX OUMET rO DIVERT SEDIMENT-LADEN RUNOFF FROM A DISAIRBED AREA TO A 1 1 All erosion and sediment control measures, will be .constructed and maintained according to 1 5 IN ADD177ON 7-0 ENSURING THAT THE CONSTRUCTION ENTRANCE IS INSTALLED, INSTALL ANY REMAWING ,. I I . �. � I I 1 ,�, To REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANEN7LY CL co LU SEDIMENT-7RAPPING FACILITY SUCH AS A SEDIMENT 7RAP OR SEDIMENT BASIN. USE I . tninimum standards and specifications.of the Virginia Erosion and Sediment Control I EROSION CONTROL 17EMS AS SHOWN ON THE EROSION CONTROL PLAN. U) _j _j , I I I I a WHEREVER STORMWATER RUNOFF MUST BE 7EMPORARILY DIVERTED TO PROTECT I . : I .. . . . ., .1 , . I I .1, I ... I � I . : STABILIZE DISTURBED AREAS IN A MANNER 7HAT IS ECONOMICAL, ADAPTABLE TO SITE COND177ONS, Ill < W , " . . 1. I Handbook and Virginia Regulations VR 625-02-00. Erosion and Sediment. Control : . I I � 1. . 6. ONCE ALL 77-IE EROSION CON7ROL 17EMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CON77?0L PLAN V) M < . � I I * WRGINIA EROSION & SEDIMENT CONTROL DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING CONSTRUC770N. I I I I I I � I . �. � � � - . I M X: � . I . I I � Uj .1. - . ..Regulations. I .1. . �. I I � I I. . I I . . I I . I . . ... � AND ALLOWS SELEC77ON OF THE MOST APPROPRIA 7E PLANT MA TERIALS. TO IMPROVE WLDLIFE AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CON7RACTOR CAN BEGIN CL LU I � I I - I . I I � . : EROSION CON ZROL HANDBOOK SPECIRCA 77ON NUMOER THESE S7RUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MON774S OR LESS, . . . I . I , I . � I I I . 2 to .1 I � 3. All erosion and sediment control measures are to be placed prior to or as the first step in .� � HABITAT TO ENHANCE NA7URAL BEAUTY UPON COMPLE77ON OF CONSTTUC770N AC77W77ES, ALL UTILITY INSTALLA77ON OPERA T70NS. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN SMUCTURES > W 0 1 * WHICH CAN BE PROLONGED NTH PROPER MAINTENANCE. . - �. 1. .I . . i . - I I . I � L I I � . . � I I . . I .� . � . . I : . LU < � . . 1. . . I I . I . � � .1 � Clearing. 1 . � I I �. . "Ill., . . I .1 �.. . I �. I I AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. SUCH AS DAMS, DIKES, AND DIVERSIONS IMMEDIA 7EL Y AF7ER INSTALLA 770N. En .� � . � I . � i .. . I I 11 I 11 I � � � . 11 . . Z INSTALL PROPOSED U71LITIES AND SERWCES AS PROPOSED ON E APPROVED PLAN. LOT CLEARING AND Uj 6-4 0� i I I I I I I 171 S7RAW` BAIL BARRIER 3.04 J. 12 DIVERSION. . 4. A copyof the approved erosion and sediment .control plan shall be maintained on the site at . . YUPORAR Y SSEDW G, 7H > LU � I . I 1, I � ., I . � Uj a- 0 1 I , i I 1 I . I I � .. I I � � � I 1. I . I I � I . . . I . I I I � I I � I A CHANNEL CONSTRUC7ED ACROSS A SLOPE NTH A SUPPORTING EARTHEN RIDGE ON � .. all timeS. I . . .. . . . I . 1. . . '. � I THE ESTABLISHMENT OF A 7EWPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING NTH GRADING MAY ALSO BE PERFORMED FOR 7HE DEVELOPMENT OF 7HE BUILDING PADS ON THE LOTS. W Cd a I �. . � . I I I . . I I . . . I . I I . - I . I I 6- b.- 7HE LOWER SIDE TO REDUCE SLOPE LENG7H AND TO W7ERCEPT AND DIVERT I.., 1 5. Priorto commencing1and disturbing, activi Is iha . W 1, - 7EMPORARY DIVERSION DIKE 3.09 1 11''. ties4 a 8. PERMANENT OR 7EMPORARY SOIL STABILIZA 77ON SHALL BE APPLIED TO DENUDED AREAS WTHIN SEVEN DAYS . inarea other nindicatedon.thesepUns . APPROPRIATF RAPIDLY GROWNG ANNUAL PLANTS. TO REDUCE EROSION AND SED114ENTA77ON BY V) � . . . . I I . I &a P� STORMWA 7ER RUNOFF TO STABILIZED OUTLETS AT NON-EROSIVE VELOC177ES. APPLIES : .1 1. .1 I 01duding, but not lin I tited to, off�sit� borrow or waste areas), the contractor shall submit a . . � � I AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABIL TION SHALL BE ...'' I �. .1 I - . . .. . I I I I � 11 . STABILIZING DIS7URBED AREAS THAT NLL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF 5: � � 1. � I . ' I WHERE RUNOFF FROM AREA S OF HIGHER ELE VA 77ON MA Y DA MA GE PROPER TY CA USE I � ,..." � I supplementary. erosion control plan to the �ownbr for review. and approval by the plan � : , . I I . I APPLIED WfTHIN SEVEN DA YS TO DENUDED AREAS 7HA T MA Y NOT BE A T FINAL GRADE BUT MLL REMAIN LU - - (B MORWOtMOOM TEMPORARY SEDIMENT TRAP .3.13 EROSION, OR W7ERFERE W177-1 THE ESTABLISHMENT OF VEGETATION ON LOWER AREAS, � � I � .1. I %_ I I � .. I I .1 11 I I.. : MORE THAN 30 DAM TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWhIS7REAM OR 0� WHERE SURFACE ANDIOR SHALLOW SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, . . ,� I I appro�qingauthority. I ''I .1 I � I - . ,� . 1. I I 1. � . . . � � . . . I OFFS17E AREAS, AND TO PROWDE PRO7EC77ON TO BARE SOILS EXPOSED DURING CONSTRUC77ON DORMANT (UNDISTURBED) FOR LONGER 774AN JO DAYS. PERMANENT STABILIZA77ON SHALL BE APPLIED TO I . & The contractmis r0s nsible for i nst3llation of ap') AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. I I I v additional erosion control measures � � � . <[[M) SEDIMENT BASIN 3.14 AND WHERE 7HE SLOPE LENG7H NEEDS TO BE REDUCED TO MINIMIZE SOIL LOSS. I I I . �. I P0 I . . . � Y I . .. �. . I . UA177L PERMANENT VEGETA77ON OR OTHER EROSION CON7ROL MEASURES CAN BE ESTABLISHED. . .i I I necessmyto,prevent erosion and sedimentationas deterimbed b theplanapproving . . . 9. ONCE 774E SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, 7HE CON7RACTOR CAN REMOVE I � � . I . I � . . I (�� I 1. . I ...1. .. I . . 1. . 1. . . DUST CONTROL: THE EROSION C0N7R0L MEASURES AND CONVERT THE SEDIMENT 7RAPS TO PERMANENT STORMWATER J. 13 TEMPORARY SEDIMENT TRAP_ '... I authority. .. � ... . �.. . . I I . .. . 1. I I .1. I //12>1 .. .. ' . . . . REDUCING SURFACE AND AIR A40VEMENT OF DUST DURING LAND DIS7URBING, DEMOL177ON AND MANAGEMENT FACILITIES. NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND I . . I I . INLET PR07EC7701V J. 07 A TEMPORARY PONDING AREA FORMED BY CONSTRUC77NG AN EARTHEN EMBANKMENT .. 11 7. All. disturbed areas are to drain to approved sediment control measures at all timeg during , . I � - . I . � I . I .. . , � o ac . - e ' . .. CONSTRUCTION AC77W77ES. , VE INSPECTOR GIVES PERMISSION. ALL EXIS7NG B10FILTERS MUST RE AIN IN PLACE FOR AS LONG AS a K001 NTH A STONE OUTLET TO DETAIN SEDIMENT-LADEN RUNOFF FROM SMALL DISTURBED . I land disturbing .4vities and during sit development until finalstabilization is, achieved. T1 I M 11 � 1. � . I - .. - I , I , � .. . I . � - I � . I . AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT USE .�� 1.8. Durliflg dew4tering operations, wa ed,iiito an . I TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE POSSIBLE AND 7HEIR REMOVAL MAY ONLY BE AUTHORIZED BY A COUNTY INSPECTOR. SIL T FENCE 3.05 1 1 1 ter willbepump ap iltering device I I I I 1 1. . . . ,proved f . � . I , ... BELOW DISTURBED AREAS WHERE THE TOTAL CONMISU77NG DRAINAGE AREA IS LESS � � . . 9� The contractor shal in ect all erosion controlineasures periodically and after each runoff- I . . THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS. 7RAFnC SAFETY 10. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE WRGINIA EROSION AND SEDIMENT & . . I . . 11 sp - I 11 I I . I I . P -4 V-4 1-1 V-4 I THAN 3 ACRES, WHERE 7NE SEDIMENT 7RAP WLL BE USED NO LONGER 77-IAN 18 Producing rainfalt event. A,Ay ,necessary repairs or cleanup to maintain the effectiveness of : PROBLEMS OR HARM ANIMAL OR PLANT LIFE. CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN - . 11 I I �, - I , 1. I .1 � � I .1 . :;i:- ;i 8i I I . MONTFIS, AND IT MAY BE CONS7RUCTED EITHER INDEPENDEN7L Y OR W CONJUNC77ON I .1 � . the�&Aon control,devices I shall be made immediately . I . . .. � . �. I I 1.� ''... I I . ACCORDANCE W7H THE VIRGINIA EROSION AND SEDIMENT CON7ROL HANDBOOK. A i;� "j - ;�- I - . . I . .1 �� I . � DUST CONMOL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF ;��r ;�� ;:� , . I I I CONS7RUC770N EN7RANCE 3.02 NTH A 7EMPORARY DIVERSION DIKE. I I . 1. . . . I � � � I . . I � 1 . I . I .. 11.1 . . 11. ALL TEMPORARY EROSION AND SEDIMENT CON7ROL MEASURES SHALL BE REMOVED WTHIN 30 DAYS I i 0 1 11 I 10. All fill material to be� taken fron.jan. approved desiguated borr0t1varea. : �. � I � DUST DURING CONS7RUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE KITH THE VESCH. . � . I . . 1. I .1 I I � . . .1 .I. I I I I I AFTER FINAL S17E STABILIZA77ON OR AF7ER THE 7EMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS J. 14 7E*A4PORARY SEDIMENT BASIN. � I � . . 11., All wast.em.aterial.s�shallbetake,nt6�anappfov�ed waste area. Earth fill shall be ,inert . . - 7FUPORARY DIVERSION DIKE, . � I I I I I I I I . I 11 , � I CHECK DAM 3.20 A TEMPORARY BARRIER OR DAM W774 A CONTROLLED STORMWATER RELEASE STRUCTURE I . . materials only, free ofroots;, stumps, wood, rubbish and other debris. . I � OTHERMSE AUTHORIZED BY 774E LOCAL PROGRAM ADMINISMA TOR. 7RAPPED SEDIMENT AND THE DISTURBED . . � . . I I 11 & � FORMED BY CONS7RUC77NG AN EMBANKMENT OF COMPACTSD SOIL ACROSS A I 1. . I � 11, 11 1. � . � A RIDGE OF' COMPACTED SOIL CONS7RUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA SOIL AREAS RESUL77NG FROM THE DISPOS177ON OF TEMPORARY MEASURES SHALL BE PERMANENTLY � � 12. Boffoworwaste.areasaie�t6be,reclaiinedwitliiii7.day,sofe,o.molo,tionp.erZarfing: - - , I WHICH DIVERTS OFFSI7E RUNOFF AWAY FROM UNPROTEC7ED SLOPES AND TO A STABILIZED OUTLET, � . . DRAINAGEWAY TO DETAIL SEDIMENT-LADEN RUNOFF FROM DISTURBED AREAS IN "WET" � - I . . I . . . I STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. b�l - . Ordinance section 5.1.128, _ . I .. . .1 . � I I I I I I I . OR TO DIVERT SEDIMENT-LADEN RUNOFF TO A SEDIMENT 7RAPPING S7RUCTURE. MAXIMUM Z . I P, TEMPORAR Y FILL DIVERSION 3.10 AND "DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SET77E . . �. 13. Al I inert. materials shall, be:transpoaod j.A.compliance...with section� 13-301 cvf the Code of . � . @ OUT APPLIES BELOW DISTURBED AREAS WHERE 7HE TOTAL CONTRIBUTING DRAINAGE ... .1 1. . � I . . - I .. . I � � EFFEC77VE LIVE IS 18 MONTHS. . . 1. Albemarle. � I . 1. . ,� I . - . . . � � ity involvi I i6d arial-typepow equipment shal I be I I . . orrd* fill or. waste activi I I I I SPACE AND APPROPRIA7E TOPOGRAPHY FOR THE CONSTRUC77ON OF A 7EMPORARY . �, I I � ag .0 I I � � er I limited to . - <� AREA IS EQUAL TO OR GREATER 7HAN THREE ACRES. THERE MUST BE SUFFICIENT I .1 I .� . � I 11 11 . I I . . . � . I ... ROCK CHECK DAMS., ZEAP-0 - 1 14. B RA R Y SEEDING. k9 01 0- DI VERSION 3.12 I I . I I I .. . SMALL, 7EMPORARY STONE DAMS C0NS7RUC7FD ACROSS A DRAINAGE DITCH TO REDUCE 7HE IMPOUNDMENT CONCRETE FOUNDA77ONS 24" DEEP & TWCE 7HE WDTH OF THE RISER . .11 die hours of 7,00am to 9:00pm. - � .. . . .. . ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EX7ENDED PERIODS OF TIME SHALL I . I , . � - 1. . � . . 1. . � . (8 . I . I 1 15. Borrow, fill. or waste actMtv shall be conducted in a safe mamier than maintain"; lateral . . VELOCITY OF CONCEN7RATED FLOWS, REDUCING EROSION OF THE SWALE OR DITCH. LIMITED TO USE BE SEEDED WTH FAST GERA41NATING TEMPORARY VEGETA77ON IMMEDIATELY FOLLOWING GRADING. a. DIAMETER SHALL BE INSTALLED ON ALL RISER STRUCTURES. RISERS SHALL BE .. 1. � I I � I I �11 �� I I I 1. ,. ,. 1. 11 � . I slip , .. ''. I I I ,IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS, SHOULD NOT BE USED IN LIVE EMBEDDED 9" INTO 7HE FOUNDA770N. I.. � port, or order to minimize anyhazard 'to persons;, physical damage to adjakeent land and . . SELEC77ON OF THE SEED MIXTURE WLL DEPEND ON THE 77ME OF YEAR AND WLL BE APPLIED PERMANENT SEEDING 3.32 1. 1. �: I . I . 1. .. . I . . �. I � .1 �. unprovements,anddama tb�an public areetbecaust o slides, sinking, or collapse., �. I STREAMS. Z .. . I � I I . I . . . I gq , y I I . - . __� .1. . .. I . 11 I ... � � . 1. I I � . 11 .. TO DIS TURBED A RES 77-IA T MLL NO T BE BROUGH T TO FINA L GRA DE W THIN 30 DA YS. a L J. 18 OU7LET PROTECRON., I , . �'. 1 16. The developer shall reseryethe right to install, maintain, remove or �.onvert t(o permanent , : � I . � STORM DRAIN INLET PR07ECTION. (3) 2: I I . I � I I I , 1.� . I I .. . STRUC77JRALLY L APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEWCES � I I � stormwater . managemer . it 1. faciliti I es - where appli I cable all erosion I c . ontrol meas es required � I I . PLANTS SHOULD BE SELECTED APPROPRIATE TO 7HE SEASON AND S17E CONDITIONS FROM I- 1. � , I - I I tU �, � I THE INSTALLA77ON OF VARIOUS KINDS OF SEDIMENT 7RAPPING MEASURES AROUND DROP INLETS OR I . I . I . � � TOPSOILING J. 30 PLACED AT 714E OUTLETS OF PIPES OR PAVED CHANIVEL SECTIONS. TO PREVENT . . , I I ardlos.s6ftho sale of any lot, unit, buildingor oth po i TABLES J.J1B AND J.31C. N07F THAT TABLE 3.31B PRESENTS PLANTS WHICH CAN BE USED I,,- __� I I by this plawreg I � , er rpou of! th . CURB INLET STTUCTURES PRIOR TO PERMANENT STABILIZARON OF 7HE DISTURBED AREA; LIA41TED TO 0 L SCOUR AT STORMWA TER OUTLETS, TO PR07ECT THE OU7LET STRUCTURE, AND TO . . � , � . . . � � I .. - �. . 0--proporty! CY) 3: i ::.. 11T Temporary stabilization sb , ary , I � I I I . WITHOUT EXTENSIVE EVALUA77ON OF SITE CONDIRONS, TABLE J.J1C PRESENTS MORE IN-DEPTH MINIA41ZE 7HE P07EN77AL FOR DOMVS7REAM EROSION BY REDUCING THE VELOCITY AND . . ullbglampor seedingandrutilching. S�eeldingistobeat,75 . . DRAINAGE AREAS NOT EXCEEDING ONE ACRE, AND NOT W7ENDED TO CON7ROL LARGE, , I . . � I . ., - I lbs/acre and in-'the months of 0 si nnual INFORMA TION ON THE PLAN T MATERIALS. cys V) CUL VER T INLE T PRO TEC 7701V 3.08 ENERGY OF coNcEwRA TED sToRYWA TER FLows. APPLICABLE TO 71HE OUMETS OF ALL � . I � I . September,to F-bruatyto con, st a 50150 mix of A � I : , CONCENTRA 7ED STORMWA MR FLOWS. M . .1 I ,. 1, - I - � I * a I PIPES AND ENGINEERED CHANNEL SECT70NS I ". I . . I . , Ryegrass and CefealWhiterRye, oiinMarch and.Aprilto consist ofAnnual Rye,orM I I To CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO GERMINATE AND C\j I .. � . 11 I .. ay . � � 7EWpogAgy SEDIMENT 7RAp. 11 .1 I - . 7 1 . .. . . . . I I . I 11 . � I thr 11 h August to consist . 6f German, Millet. :Straw in ch . .. ly ob V) . . . I 0119 . , ul i9t6beapplie-d;at80lbs/l00sf. � OW. SEEDBED PREPARA77ON IS ESSENTIAL. . . I.. . I ... I .. I I I - .1 � I . f ,� I . A SMALL PONDING AREA, FORMED BY CONS7RUC77NG AN EAR7HEN EA48ANKMENT N7H A STONE GR 4 DUST CONTROL J. 39 J. 19 RIPRAP. I I I . . Alternatives, aresubject to:.approvedb the Coun�y erosion control inspector. .: � � � I I I � . _j A PERMANENT, EROSION-RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE .1 . . . 11 I . I . ly, �- � I" � ... 1. - . ., . . I OU7LET ACROSS A DRAINAGE SWAL& TO DETAIN SEDIMENT-LADEN RUNOFF FROM SMALL DISTURBED AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY FOR TEMPORARY W ce) U 14 0 _*_� .. . M, Permanent stabilization.slidll be lime and fertilizer permanent seeding, and inulch. q . , It . - I I I � I . . . NTH FILTER FABRIC OR GRANULAR UNDERLINING. TO PR07ECT THE SOIL FROM THE .. I I I . I . I . � I - I I I I AREAS FOR ENOUGH 77ME TO ALLOW MOST TO 7HE SUSPENDED SOLIDS TO SETTLE OUT MAXIMUM SEEDING. TABLE 3.31A MAYBE USED TO DETERA41NE THE ACTUAL NEED ALONG WITH < I Agricultural grade limestone shall be applied at 901b&/1000sf, incorporated into: the top 4-6 - . I.. - . I . - EROSIVE FORCES OF CONCEN7RATED RUNOFF, SLOW THE VELOCITY OF CONCEN7RATED i I.. I � I � . �_ I 1. - I EFFEC77VE LIFE IS 18 MON7715. SUGGES7ED APPLICATION RATES.' I F__w � . inches of soil., Fertilizer shall be applied at I 0001bslaere And oongist of a 10-20-1 0 nutrient : � 1. � � I I I , I . I I I I I . I .1 . . I - I 1 I - __1 TEMPORARY SLOPE DRAIN J. 15 RUNOFF K141LE ENHANCING 774E POTEN77AL FOR INFILTRATION, AND TO STABILIZE SLOPES mix.Termanent seeding shallb6 applied at 190lbs/acreand c I s st of 95 1 % Kentucky 31 or.: TEMPORARY SEDIMENT BASIN. FER77LIZER SHALL BE APPLIED AS 600 LBSIACRE OF 10-20-10 (14 LBS/1,000 So. FT) OR U) Ill @ N7H SEEPAGE PROBLEMS, ANDIOR NON-COHESIVE SOILS USE WHEREVER SOIL AND .. .11 � . � . - 1. I � .11 � I on.i I I I.. . . N A7ER TURBULENCE AND VELOCITY� 11 ..� . � . Tall Fescue and 0-5% PerenniaIR . c � I e . A TEMPORARY BARRIER OR DAM W7H CONTROLLED STORMW47FR RELEASE S7RUCIURES WHICH IS EQUIVALENT NU7RIENTS. LIME AND FERTILIZER SHALL BE INCORPORATED INTO THE TOP 2 TO 4 Uj 0 WATER W7ERFACE AND THE SOIL CONDIRONS, W . - I yegrass or Kentu ky Bluegrass. Straw mulch is to b 0 � I I � . . � 1. I .. I . - I . I � I I I , � . I . . I lied at 80lbs/100A, ,Alternatives are subiect to approved by the County erosioncontrol. . I . FORMED BY CONS7RUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGE& Y IT IS INCHES OF THE SOIL IF POSSIBLE M EXPECTED VEGETA7711E COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE � I app I .1. . I I � I . I I I I W " SAFETY FENCE 3.01 . I I I .... 06 DESIGN FLOW CONDRIONS. .1.1 I inspector. . � : 11�11 11.1 1. 1-1- .1 .1 ''I I . USED TO DETAIN SEDIMENT-LADEN RUNOFF FROM DRAINAGE AREAS J ACRES OR GREA7ER FOR IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER ROUGHENING IS N e ..� I . . � . . I � . I I 1k.0 . ... 11 - 9 are toftdns weekiv and after each rainfalt. An damage , � C\1 ,19.: Maintenance All measure ENOUGH 77ME TO ALLOW A40ST OF 77-IE SUSPENDED SOLIDS TO SET77E OUT IT CAN BE LLJ . . 11 I . I I'll ,. 1, 1. � ,� I p0te<l 13 . . ,. ., , , , Y. , . . . REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR HARDENED, THE SOIL SHALL BE meow b�. &I 3.20 ROCK CHECK DAMS. I . . gging to structu " i I 'di . y7 Silt traps are tto b cleaned , I r-q > I � � or clo � i ,tainieas�uresis.to�be.repwrimme atel - . e CONSTRUC7ED ONLY WHERE 7HERE IS SUFFICIENT SPACE AND APPROPRIA 7E TOPOGRAPHY MAXIMUM LOOSENED BY DISCING, RAKING, HARROWING, OR OTHER ACCEPTABLE MEANS. TRACKING WITH 7EMPORA R Y RIGH I- OF- WA Y J. 11 .. . I I , _ I I . � . I . I . . .. I 11, < � . F, P, SMALL rEMPORARY STONE DAMS CONS7RVC7ED ACROSS A SWALE OR DRAINAGE DITCH. . 1. . whea �5 0% of the wet storage volume is filled with sedirnePt', All seeded .,areas are to be: . I I . . . EFFEC77VE LIFE IS 18 MON7HS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED 1 14 1 . �, I I � I I I I I . . . I . I . . E� DI VERSION TO REDUCE THE VEL OCI TY OF CONCEN TRA 7ED STORM WA 7ER FL 0 WS, THEREB Y REDUCING : I ., I I I I reseeded when n . ecessary to achievea good stand. of grasa.::�Silt f6nee and diversion dykes : . �:. , I 1. BULLDOZER CLEATS IS MOST EFFEC77VE ON SANDY SOILS. THIS PRACTICE OFTEN CAUSES 4 > r", �- I � I 1. I � I I . EROSION OF 7HE SWALE OR DITCH. THISPRACTICE ALSO MAPS SEDIMENT GENERATSD I .11 I I . .. � I . . . 1.� I . . � PROFESSIONAL. UNDUE COMPACTION OF THE SOIL SURFACE, ESPECIALLY IN CLAYEY SOILS, AND DOES NOT AID - � 1. which are collecting sediment to half their height must be *61eaned and repaired - - . I 11 FROM ADJACENT AREAS OR THE DITCH ITSELF, MAINLY BY PONDING OF 77-IE � I . I . .. . I . I . , . � �� . I OUMET PR07EC770N. PLANT GROWTH AS EFFECTIVELY AS OTHER METHODS OF SURFACE ROUGHENING. W � � I I . .. I .. � .. . I � I 1. . I , , . I . , . � I! . . . , . . I . � .. -ately. i : 1 .11 . 1, 11 .1 . .. I . I I I . I.. imm6di 9 I STORMWA7ER RUNOFF. THIS PRAC77CE, U77LIZING A COMBINA77ON OF STONE SIZES, IS � . � 1, � I 1. . . . 1. I I . . I I . 1. I I . _j I 1. I .. I I I I . . . I I I I - . . . 2C I r. All temporary . :ero I an, se Menteon - I I I ve I I.. . 1 I JHE INSTALLA77ON OF RIPRAP CHANNEL SEC77ONS ANDIOR S77LLING BASINS BELOW STORM DRAIN LIM17ED TO USE IN SMALL OPEN CHANNELS WHICH DRAW 10 ACRES OR LESS. I . ., S100 A di tr6lmeasuresaretob6pefilo dWit1xin:30daysof : SEED SHALL BE EVENLY APPLIED WTH A BROADCAST SEEDER, DRILL, CULTIPACKER SEEDER OR _j C6 I , . I � I I .. I I I I . � I . . .1, . .1 � OUMETS TO REDUCE EROSION AND UNDER-CUT77VG FROM SCOURING AT OUMETS AND TO REDUCE . I I., I I final si ubject to approval by the. I HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO MORE THAN 11 INCHES DEEP. SMALL I .1,11 I fe stabilization, when measures areno longer needed, s . . 5; < I I . . I . . I . . . . . � TABLE 3.31-A ., : � ,., I . . I � 1. � . 1. . I . � I FLOW VELOC177ES BEFORE STORMWA 7ER EN7ERS RECEIWNG CHANNELS BELOW 7HESE OU77-ETS. . . I I I � 11 , . I.''. County erosioncontrol inspectorv.: . . I . I .. . . . I � , . . I . I I � . . I . I I . � . I - I- 3.31 7EMPORARY SEEDING. I . 21. Tliis� plan shallbe void if I the, owne I r does not obtain a� permit I within I yea . r of the d I ate of ' I I � : CUX VERT INLET PRO 7EC 770N.- SEEDS, SUCH AS KENTUCKY BLUEGRASS, SHOULD BE PLANTSD NO MORE THAN j INCH DEEP. t9 C/) T-i Z - IJMING REQUIREMENTS THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY ''I - I . .. � � I . I � . I . . � I I SSES AND LEGUMES SHOULD BE PLANTED FROM j INCH TO j DEEP. W _j . I . �. . . . � I A SEDIMENT F70ER LOCATED AT THE INLET TO STORM SEKER CULVERTS WHICH PREVENTS SEDIMENT 0 THE R GRA . approval- (Water Protection Ordinance section 17-204G.). � . I I . . I ! : 1 I I I I � - 11 . �, I - 11 � , I 11. . .. � � I �_ SEEDING KITH APPROPRIATE RAPIDLY GROWNG ANNUAL PLANTS. TO REDUCE EROSION .: �: . I I � . FROM ENTERING, ACCUMULATING IN AND BEING MANSFERRED BY THE CULVERT IT AL 0 PROVIDES FOR TEMPORARY SMS . I � � 22. Permanent vegetation:shall he installed on. all denuded areas. within nine (9) months after S SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY SUMMER MONTHS - U) 0 , I �. I . AND SEDIMENTA77ON BY STABILIZING DISTURBED AREAS 7HAT WILL NOT BE BROUGHT TO � I I I . the datethelanddisturbingaptivit commenced. (WatetProtection Ordinance section 17- , , I IV Z � 1 1. EROSION CON7ROL AT CULVERTS DURING THE PHASE OF A PROJECT WHERE ELEVA77ONS A D I FINAL GRADE FOR A PERIOD OF MORE THAN JO DAYS. TO REDUCE DAMAGE FROM I .I I..... � .. 11 11 "I''.. 1.1y. , _. I I., I . . . I I.. I I ... I SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC. 335, EXCEPT THAT 0 �- ce- n 20713� . I I . 1. �. . I 1, ... - I .1 � I .. I : :: . - I . .. . I . I , . DRAWAGE PA T7ERNS ARE CHANGING, CAUSING ORIGINAL CON7ROL MEASURES TO BE INEFFECTIVE. IDERED ADEQUATE. STRAW MULCH SHOULD _j Recommondtd APPliCA60 SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF-SITE AREAS, AND TO PROWDE , I . . I . 1. .. � I .1 �. . . I .. . � � . HYDROMULCHES (FIBER MULCH) WILL NOT BE CONS �_ 12FI Test AAW=121ral umms= PR07EC77ON 70 BARE SOILS EXPOSED DURWG CONS7RUC`77ON UNIX PERMANENT � SAFETY EESM- BE USED DURING THESE PERIODS. I rr, 0 :;;p VEGETA77ON OR OTHER EROSION CONTROL, MEASURES CAN BE ESTABLISHED. SOIL, DESCRIPTION A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT RILL EROSION < .j 0 below 4.2 3 tom per acre J,J2 PERMANENT STABILIZATION.- MEASURE. WILL BE RE-SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED. W _r U THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY 1B - ABELL SILT LOAM-27* TO 77S SLOPES. THIS FINE-LOAMY MIXED SOIL IS PERMANENT STABILIZA7701Y I � . I I � 1. I 1. � I - I I . 0 I '' 1. , . , 42 to 5.2 2 tons �pe�t acre PLAN77NG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT WELD FROM DISTURBED .1 - 1. '.. . I "...'.. F_ ' I I � I VERY DEEP AND MODERA 7EL Y WELL DRAINED 10774 MODERA IF PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS 1.1992 �:� :...., 1. �11�....� I 1". I.. 1. �� I I 1.�� .�, I �.. I I �. , '':...� 321 1 - � 1. � - . . 1. I . , - . ... � � I - - . .. I - 1. .-I AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS . I I 1. 1. � I I'll, I . � . 11 . .I.I., .... 111. CO Z I .� � 1. 1, � . ... �. . I. � I....: I .11 .. . I . . I. I. � I . , . , � . . - . � 1.11 .. I I .. ,. � ., , PERMEABILITY LOCATED IN UPLAND DEPRESSIONS ALONG IN7ERMIT7ENT PER THE PERMANENT STABILIZATION OF 7HIS EROSION & SEDIMENT 111''....1 . - . 1. . . ''.11- ...''.. -.1-11..'.. 11-1 I I I I - .1 . . 1. . . .. � I , , . .1 � - I .1 . . , I ton per acre ECONOMICAL, ADAPTABLE TO S17E CONDMONS, AND ALLOWS SELEC77ON OF THE MOST .. :,. 1.1".. � � �. 1. .. . I ..... I � �. .11 � .. .. . . � ". � - , 1. LU � . I . .. . , ., . ... 11 . .1.1 � 1. ..''.. . .. I 1. I I . I . . ... I . 1. , - . � - 5-2 to 6 DRAINAGE& YS, THIS SOIL GENERATES SLOW RUNOFF CONTROL NARRARVE. .. .1 .. 1. . ... , V. APPROPRIATE PLANT MA7ERIALS. TO IMPROVE NLDLIFE HABITAT To ENHANCE ; .. . I - � . - . I - I .� - " X �. I :.: : � EL : . 1. .,. ... I - . LEY � .SPREADER: I 1. , I .1 � - , . . , , . � I NATURAL BEAUTY UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WLL 16 - CHEWACLA SILT LOAM-= TO 21wo SLOPES. THIS FINE-LOAMY MIXED SOIL IS AFTER CONSTRUCTION IS COMPLETED, ALL DISTURBED AREAS OF THE 1.11 ." I . 1. I .11,11.1 ".. I I I .1 I ... .. I . 11.111. �.. I 1. . I. W F__4 I I �. . I.. .. . 1. . 11 .. . . - �. .1 . - I . .. . - �. I I I .1 ... 11 .1 1. . .1 1. � 1. . � . - ., . - - ., . I - I 1. . � . .1 .. �.. . I � I .. I -l- I . I 1.111, 1. 1. . I . I . , - . - .. . .. I . I . 1. .. .. � . I . , I , . . . RECEIVE A PERMANENT VEGETA77VE COVER. I �.� 1". � . ...... ... I... I...'', I .1 I . . �.. . 11V - .1. . I ., - . . I I . ... , I .1 , - . I I I I... - 1. .1 .. I . . . I .. .. . .1 11 .. I Source: Va. DSWC VERY DEEP AND SOMEWHA T POORLY DRAINED A NEGLIGIBLE TO LOW SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT I.. 1. ,. , . . . .. - . - I I , 1 .-I... . Ul �_ a .. I . I .1 .- I.. �. I I � . I . I.. .. . 1. 1. . .. , . ... . - .. , - ... . .. - I . .. .. . . .1. I I ... I .. � - . . 11.1 1. 1-1. .. I I I .. .. � I I I 1. . . .. 1. � � ..1. . . 11.1 1. . . .. I 11 I.. . � . .. I � I - 1. . � .1. I I . I I � I . I . I . . ... � . �. I I . . � . � . . ." I - I 11 , I I.... .1 I ,., .1.1. . � I . -) , . . � .. , ...., I . 11 J.,35 MULCHING. SURFACE RUNOFF INDEX. LOCATED IN FLOODPLAWS, THIS SOIL HAS STANDARDS. THIS SHALL CONSIST OF THE FOLLOWNG, I I I I .1 I I I . . I - I 1 .. I.. I . 11 1. . �11, I.. I :_ LU .. I-. � � I I ., I I .1 I. I I 11 .1. '' 1. � APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MA 7ERIALS T MODERA 7E PERMEABILITY . I... - � � � . I - I .1 I I ... . I � . . . � I I ..., I :... �. : .1 1. . .. . .. . . .. .1 1, ". .. . ,� ". : : � CROSS .SECTION �: : . ". . � - I.. .I - . � 0 7HE SOIL � TOPSOIL - 2" DEPTH, LIME - 2 TONSIACRE, I 1.11 I.".. 1. . . 11 1. . ., "I � . I . 1-1. (/) Z U) 7ABLY 3-31-B SURFACE TO PREVENT EROSION BY PROIEC77NG 7HE SOIL SURFACE FROM RAINDROP .1 ,� I . ... I ... . I � I .. . ... . . . � I .1 ... I - . �. . I . 11, .. I . 11 ... I .., , 1. . - , , � .... � FERTILIZER - 600 LBS./ACRE OF 15-30-15 . . . '�... I.. .1. 1, � .1, �.. I �. . .". . ,. .... I 1. ........- � I I I I � I I , I I I .1.11. .... . . 11 11 I - I I . �. - I I . ,... . . � . � - I . I - - ... 1. . - I I . . . � . . I . . 1, 1. . I � I � 11 . I I . . .. . ... 11 .. � I.. � I . I . � . I . . . I . � . . , 1. . , � I � 1, . � I . .. - . 11 I . . � � IMPACT AND REDUC4NG THE VELOCITY OFOVERLAND FLOW. TO FOSTSR THE GROWTH OF 5 1 B - MA N TEO CHA NNER Y SIL T L OA A,f - 27. TO 77. SL OPES, SOIL S OF THE MA N TEO . I.. I., 11 . im M, WMSIOR . - .. .� 1, � � I �� I I 1. . , I I . Z �_ 0 cd . .. 11 ..., �. I . . 1. 1. ,.. , �.� I .I. I W P-4 ACCF,pTABLE TF,MpoRARY SEEDING PLANT MATERIALS VEGETA77ON BY INCREASING AVAILABLE MOISTURE AND PROWDING INSULAT70N AGAINST SERIES ARE SHALLOW AND SOMEWHAT EXCESSIVELY DRAINED. THEY ARE SEED - ERNST 5311 CONSER VA TION SEED A41X - ERNMX- 1 14 (45 .1.1, - I :OR EGUNALINT..: . : �. . ., - . .1 : - - VAMME, (MR� 7) _,� � , .. . � I ::.: ,:.: I FAPLEDAN PLW I EX7REME HEA T AND COLD. AREAS WHICH HA VE BEEN PERMANEN 7L Y SEEDED SHOULD LOAMY-SKELETAL,! MIXED, HAVE A HIGH SURFACE RUNOFF AND MODERA7T__ . �. . I.. . �. I - �� .. � 1. 11 1. .� . I.. .. .1 , . I - . I . .. I 1. ... I 1. . I .1 . � . I .., , . .1 . , .� .. .. Buolto 61 MIN. - - � �� I I , . . - . W ,RENCF VOK ALL WGIONSO N CREEPING RED FESCUE, JZ5 LBSIACRE ARGILE .11 ..� .1� . I d* MIN. . � ... I I.: I . . � Z . - � 11 - I I �. . . -QUICK Rf&FE LBS./ACRE PENNLAW I I . '' ��* I , � : ... : 1. . � . . . I - I I .. . BE MULCHED IMMEDIATELY FOLLOWING SEEDING. AREAS WHICH CANNOT BE SEEDED RAPID INTERNAL b4�iNAGE. PERMEABILITY IS MODERA TEL Y RAPID. . - �.., �..... I - I -------- ,.. ,.. F- 0 BECAUSE OF 7HE SEASON S14OULD BE MULCHED USING ORGANIC MULCH MULCH MAY KENTUCKY BLUEGRASS, 375 LBSIACRE PARK KENTUCKY BLUEGRASS, 15 1. .. .1 . rr . . . SURIED C M W �.. . I . . . . , . _1 11 . 1. . .. Rate TYPICALLY LOCA7ED IN GENTLY SLOPING TO VERY STEEP UPLANDS. I I.. I.. . . .." �. I -1. I 11 - 1. �. - � BE USED TOGETHER KITH PLAN77NOS OF TREES, SHRUBS, OR CERTAIN GROUND COVERS I .1 .1 . . I I 1. 111 � �_ U Plating Dms Species Ilhqliam� LBS./ACRE ANNUAL RYEGRASS & 15 LBS./ACRE PLEASURE PERENNIAL .. 1. 1. .1 , .... � (f) , I I � - I I I I WHICH DO NOT PROWDE ADEQUA7E SOIL STABILIZATION BY THEMSELVES, CAN BE USED 1, � . I - I � I I �� W I . . 11 . . 11 - . - . I I I . _ . . 1. � I . . . I ..1. I ., 51C - MANTEO CHANNER� SILT LOAM-73' TO 15% SLOPES. SOILS OF THE AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND . I.. . . 1 1: :, LEM UP Or. � � 2,1:6R : mi Uj 0 IN CONJUNC77ON NTH 7EMPORARY SEEDING. . I..�� � �1� I:: � . ,: :, SPREADER � 111� � I I .1, MAN7EO SERIES ARE SHALLOW AND SOMEWHAT EXCESSIVELY DRAINED. MAINTAINED ON A REGULAR BASIS. , ...., ., .11 .� .. 11,11, �� � RATrER �_ Sept. I � Feb. 15 50150 Ma of ,.. I I I... . "I. .. : i, .... I I . En ce � . . I I I , 1. I . Amwal Rytw-ss J.J7 TREES, SHRUBS, VINES & GROUND C005T� THEY ARE LOAMY-SKELETAL, MIXED, HAVE A HIGH SURFACE RUNOFF AND I - � . I - . 11.1 , I - Ott �. ! � , : .. .. - I .1 � I . I .. .11. - , . .: I ..., .1 I .. . . I 1, ".. . F - , I � � I I I I . 1. . I . .1 . . - � , .1 , . � I A 4A IN TEMA ..... �.. �... I 1. .. I - . - I 1. .1 �. I I � 1. I 1 , I.., LU . .. 1. ... I . I - . .1 I I � ., I... I I I . I .1 . 1. .. - 11 .1 1. (141jual. Inalti-florui-q) STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETA 77VE COVER KITH 77?EES MODERATE RAPID IN7ERNAL DRAINAGE. PERMEABILITY IS MODERATELY - . ". � ... ''. � �.. .. I � . . - . I ..... .� - "I . ,. 1. "..... W , . ,. I . 1. ,. � � . . � 11 . ... . .1, � - ....''.'.... ''. . . � - - , .. . I - . - . _ . 1. 11 I . 1. . - I . & so - 100 RAPID. TYPICALLY LOCATSD IN GENTLY SLOPING TO VERY S7EEP UPLANDS. IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES MLL BE . ''.. - � , , 1. 11 . I SHRUBS, WNES, OR GROUND COVERS, TO AID IN STABILIZING SOIL IN AREAS WHERE .1 1. . I I . �. M . . .1- �.: . , � LEVEL.SPREADER: WtTR'VEG�.TATED'. LIR: � �:,: . . W I . . . I .... � � C,ere-il (Winter) Rye VEGE TA 77ON 0 VER 774A N TURF IS PREFERRED, TO PRO WDE FOOD A NO SHEL 7ER FOR : CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC 1. I L. I I 1. � - .. ' . . I I I I . I . . I . �. � . � - I 11 .... ... 11 .11 . . � 1. .. .. I .. 1. .. I I I . .1 1. � �. I Ir I I 11,1111.1- .. ... �. ... .11 11 . I ,. I � 1. I I-- . . . 1. . I ., .1. - , I. 11, . .1 1. I 11 .1. I I 1. I .1 .... 1. . - ... I .. I , � � 1 .." ,� � 11 . � . (&Mfe ce,rr ) WLDLIFE WHERE WLDLIFE HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE TURF 51D - MANTEO CHANNERY SILT LOAM-157. TO 257. SLOPES. SOILS OF THE ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS,* 1. 1. - - . IL., I . . � .... ,.. I. I I . ,., .1111111 - 11 � ... Q� - .. . � . .,� . .. 'I., �, 11.1 ,� � I .,� I . .,.". I 1 .. I 1, < I I. . I .1 . . ... I I.. I ...''. I .. I. I .,�. _1 � I . .. I . . . . . I 1. �. I , ,. . . I 11 . . I . .. . I I � I . - I I. .. . 11 I... I . 1. �'. � I. �� L. . I I ESTABLISHMENT IS DIFFICULT, ON S7EEP OR ROCKY SLOPES WHERE MOWNG IS NOT MANTEO SERIES ARE SHALLOW AND SOMEWHAT EXCESSIVELY DRAINED. A. SEDIMENT BASINS ANDIOR TRAPS M`LL BE CLEANED AND . . I .. . 1. ,� . 1. . . . .., I . . - . I I "I � I . 1. ,� . I I I . .1 �''. � I ,... I � . - .1 . .1. .11 (D C) � - .. I . 1. � . I.. 1 1. I I . ..'.... _ , - - , . � . � � � .. . . I I ... . % .. I... .. � . I � - - . L. , 1. I I .1.1 . I � .11 I I , , - Feb. 16. - Apr, 30 Annuat Ryegrass 60-100 FEASIBL& WHERE ORNAMENTALS ARE DESIRABLE FOR LANDSCAPING PURPOSES, AND THEY ARE LOAMY-SKELETAL, MIXED, HAVE A HIGH SURFACE RUNOFF AND MAINTAINED IN ACCORDANCE WITH THE WRGINIA EROSION & SEDIMENT I.. .11.1 111. I'll I . - � I � ... I I I 11 I , : .. I I . ., I I � , � , � 1. I I I I - WHERE WOODY PLANTS ARE DESIRABLE FOR SOIL CONSERV477ON, OR To ESTABLISH I .. I.. .. 1. ,� .L �..... I I : :� 1. CROSS, .'SECTION, .. 1. I .1 . I . I I 1 1 .... � 0 1 I I I . - . � . I-- � � .11 .. . <j.9JbM__!A4l0MM) MODERATE RAPID INTERNAL DRAINAGE. PERMEABILITY IS MODERATELY ".. .,.� .1 .1. . , �. �. �. � � - . � .1.11 , I . I I _ 11 C> . , . � . � .1 - . WLDLIFE HABITAT CONTROL HANDBOOK. I .1.1 , � - �..'' � . . ..� I I - I � �. I ...'' . �- . . .. . ,�, .. I I . . .. 1 I � - .. .1 11.1 .. I ��.� � ... '. � � el I.. - � CD 11. � . . . . 1. . . � . . I . . 1. . .. .. I � . . . 11 . RAPID. TYPICALLY LOCATED IN GEN7LY SLOPING TO VERY S7EEP UPLANDS. . I ... . I .. . I 1.11 . . - . . . 5" 1 . I L - ., . .. 1. , .1 � 1, I I � �. , B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR OR . 11 . � . . . I... . �. . .� . I., . 1. I C\j - ""o & N . : "_ . �! ! . 1. - .. . - I 051, #54501 . - � .. � 11 . :�: f17TO 11 1A . I I I I VP0L�SLE NX 71 . . � I Moy I - Aug 31 Gem= Millet so J.J8 MEE PRESERVA77ON AND PROTEC770N. SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE .::� I G.AVANIZED WIR9,MEISH:RAS . E UK.Wft MESH To.nm9to. I . - �. I.''.., I 11.1 - . . . I I . 0-T I � 11 I . I . I ...'', I 1.111, . .... . I 1. 11 SC . - . I . (Sg'wia italic ) PR07EC77ON OF DESIRABLE 7REES FROM MECHANICAL OR OTHER INJURY DURING LAND 62B -NASON SILT LOAM-27o TO 77a SLOPES SOILS OF 7HE NASON SERIES ARE I �'. ''... I "... .1. . 1. I I'll. I ... I I . I ..''. . ''I . ..., :00P , 1. . . . - . I . � . � . . , .. � I . � , . . - . I. I I .1 � . �. I . . . ED 7nM8 ' �, � I . ,.. , - .. � 6X6 7MT . R . . I I I � DEEP AND WELL DRAINED. THEY ARE FINE, MIXED, SEMIACTIVE, HAVE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WLL BE REMOVED AND I ,� �, TIVER CLOTH. 1. . �� . ,. ..., I.... .�, I '......." .� U I . � ,� . .1. .. .. I. �, � . . 1. . I . .. .I 1. I .. .. 1. . . DISTURBING AND CONSMUC77ON AC77WTr. TO ENSURE THE SURWVAL OF DESIRABLE MEDIUM TO RAPID RUNOFF AND MODERATE PERMEABILITY THEY ARE CLEANED, OR IT MLL BE REPLACED. I., I ECURE WI*E.TO IND, 11 . . I . . I .e.mN_ . I . � . Uj * I __ . __ 1.11 �_ - . - - - I - .111 11 :� DIMENT CONTROL, I �: :, "TH WIRE, STAPUES :, ... , , .. TREES WHERE THEY WLL BE EFFEC77VE FOR EROSION AND SE , . .. 5 .. I - 5 Resom To .:.: �.. . I 1. I .1 I'll, , . I I I I - . I I I � I - I . I f I WATERSHED PR07ECTION, LANDSCAPE BEAURFICARON, DUST AND POLLU77ON CONTROL, TYPICALLY LOCA ON NEARLY LEVEL TO VERY S7EEP UPLANDS. C. ALL SILT FENCE BARRIERS MLL BE CHECKED REGULARLY FOR :1- � ... 11 Im . I 11 , . b I �. 1: , I ...� LU I . .. I I 11 ''I'll I.... rn Source: V& DSWC NOISE REDUC770N, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS UNDERMINING OR DETERIORA77ON OF THE FABRIC AND REPAIRED AS .: , I.... � . .. 1Z - � I I : � .. I I .. � I . -, 1. 0 LU .. . - - � I . I BEING CONVERTED FROM FOREST TO URBAN-TYPE USES APPLIES IN 7REE-INHAB17ED 62C -NASON SILT LGAM777. TO 15Y. SLOPES. SOILS OF 77-IE NASON SERIES ARE MOVED WHEN THE LEVEL OF SEDIMENT : �.:..:: I .... I - 0� (D = REQUIRED. SEDIMENT SHALL BE RE .. 7' UK .' . . A , 6 � I I . .. I I." �, � � . 1. 0- U) AREAS SUBJECT TO LAND DISTURBING AC77W77ES. DEEP AND WELL DRAINED. THEY ARE FINE, MIXED, SEMIACTIVE, HAVE ' I-.". 1. uNowupuD : :, . � . 2: 1: OR �,- ,: . DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. I .1 �,:: sm''., -.1 11, 1: .11 I I � FLATTER - . - .1 . . . I . I I:, : . I I .. �. I 111. . , , MEDIUM TO RAPID �RUNOFIF AND MODERA TF PERMEABILITY 77-IEY ARE - � - . I . ., 1. I I I I 1. - .I I.-I-1 I 1. . � '. - I � JOB NO. 3.39 DUST CON7ROL: D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A � . I � I - - - . . I 1 � 1. 1-1-1. .. .11, 1-11. . I I'. - I 1 . - . . I.. . � I � - . 11.1 .1 I. . I I.. .. I 11 I-, . , � 1. � .. , . . , 1 , . .1 .. ..:.: � ON 6"-: I � ." . I .. .. � TYPICA LL Y L OCA 7ED ON NEARLY LEVEL TO VERY S7EEP UPLANDS. . - - 1. I ,� 1 �. � . � �. . � I . 1, 1 ... � I I I I . I . I 11.1 . 1''. 1, I - . . ,7 I �, 1.� � I . I .. "I, 1- I . - I I I . � I I - REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL177ON GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND .. . .1 .. � . 102054 1 . .. I I � . .11 . I I I .. 1. I . . 1. I . . 1. . . . � I = � ''. .1 - . 11 � I . . - . I - .. I I � I , , 11 . - . , . I ... . 1. .. . �. � �.. I .� . 1. I I I.. . I ... I ". �. - .. - , I.. ... . I 111 I �. . - � .1 .1. � I I I � � � .1 I I .. - I . . ... , , . AND C0NS7RUCI7ON ACT7W77ES. TO PREWNT SURFACE AND AIR MOVEMENT OF DUST RESEEDED AS NEEDED. . 1 1, . : �:: � � :LEVEL: SPREADER. WITH.:RIGID .LIP. I . �. I"". SCALE 1. I � 1. � . 11 - � 1. . FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES 76 - RIVERWEIV LOAM-O,-. TO 5X SLOPES. SOILS OF THIS SERIES ARE VER Y , .. . , 1. ... �. I ''....1. ..".....''.1--.1-1 1. .. I...".., I .". � . - .11 � 11 . . . - :� I.. � - .. ,. I , I , I I 111. . I MIN. PHY=k. MUIREMENTS br RUEh CLM NOTED N SM, *. &� Ska,3_19, RO W :_:: � .1 .. - . , I . - . - I . WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL DEEP, WELL DRAINED, MODERAMLY PERMEABLE AND FORMED IN LOAMY �. I I I - ... 1.11 I I 11 1,1 1. .. .. . . . .1 ... - ''. � . . - I � N/A . . . - . I . . � .. � I 1 , . , .. - I I - . I I � I � I I OR PLANT LIFE. DUST CON7ROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE ALLUVIUM ON FLOOD PLAINS. RUNOFF IS LOW, CAUSING 7`H#S SOIL TO . I . I .. I I .� 1, - � 1. .'. 1. �.. .... I.. I , . I 11 . 1. - I - .. 11 � I. ". � �. I I ". - I . ..... �, ,. �. � .. - .... .. I . .. - .. I AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE FLOOD FOR SHORT PERIODS MOS77-Y IN KqN7ER OR EARLYSPRING MONTHS. :: Soutm Va,'DSWC and N,C, Ermion aW Sediment �.:. I I � . I - I . I . 1. SHEET NO. . .1,11 . I � . 11 .. I � ..1. 1. .: �:] , i - : .. . . I �.� 11: . . PW6 3.214 IN ACCORDANCE NTH THE VESCH. 1. - � coi1ttg,p,l��hin��pdl)esii�M4��wl:�: ,�.. 11 - . I.. .. � 1. .. . � . . � . . I I � � I 1 3 1 � � "'• - „,.,....._.... _. ..,..... .�...,.._..._ - _ - ..W...._.,. .- ---.:. -�-... _ ^ .-- „-- .,..._� ^-- _•_.,_. --- "._'^+...__ .._ �vak�ik�� °,: e « ,_- . --.-.— s..n --¢'" q . "T • � O fi t ! � t � � 1 .'� _' _•.. '""°•,. !,!.... . _.._„__ � _. __ .. ..- _. -... _ .._.___. -..�� .,,......_ _.._.. --- __ � ,_.. w� ..______ _.. -- .�,_.« '” ",,,- ,..,_,. � � � ^- ..- .__....___.... .._--- `---- ... ^"”' ...�.,,._,,,,,.,,,,,, -.,�. ,_..._, �,„/ „ate" .� - .».- ....- �....r��,.,. °._..:..- ^", y'. J'�,�I f 1 I O , r _„ _..__. __..,._ .�� "- � ; ., r�.,, --' ^� �...- � SOT R COLLINS O i I ; Q ` , --- _ : _. - fl° Q° _ _., ___. _ -.� _. _ �' ` s . " ✓ �U No. 35791 - _ -F ✓ j u. t i it � � / O, ,.✓'- O_ , .. ._.,,L., ---- _ .,....... ....,...._..._ ,.- ....._._ ................ ..... .�... _ --,.. ,... 0 �-. „„,�ti \ ,.,,,,,,.,,,_ `.'" -'--�• �. ' "°?4w,�' , � F ar e�`�, t �,Hfi' . p> �,r„i �;s.: "�~ ..•� '� "` `♦V"' \i OAXAL ..-. �Y- �.__ '..� ,..cam':"°;«...- ..._.� ✓ �sr a ", �zr, ': '.`'9`"' Y.,'..,fJ: .i' F /,,, ,r'". r" M✓' e - .. ---''" i "�� rte• ;,..�. �/(-)�� 's i .✓' .�. ,.- ...., -- > . «' . .. « v / YC/-" --�-_ ,_,- .- _... -'. "...,'..".•.rte 'y ":: ' \a'� . Y tc 'f ' ' n+4^ ' w�" •✓°'' .d+k .fr' y- •' -"":, ✓",... ]]l ' � , a � ,/ •, � ,�.._,r _... __,�.•. "1"IIPI�- 93/5 ='t _... _:..� -- . « . -� « « > �!,// w,..- ..,,, ---- -�.-,� ..:.� -� �, f � F� � � ,� ___ --~- ...-,- ,,.- �,�,,,,.„._ ..- ' , s,`�a _� ti,- •.,-.' "- '.:".�yF..... i a:r,n i. a: } we,"yd' r,�?'". , .r' SiG . a,va. .:v'' r ` ✓' ......• -, 1 � � � '' ,'. .. " « .,- .,_`ae+`°' �.- ^_'"'y ....• -. :...... .. ::"""n^'.' " Yr" h:: b .� `k ��: . ff... `r< �kk /: 'U ,. /' //. ' F ..:... i' d .. ... ..: $'.. .. ... .... 1. w� ! _ SiGf CHARLOTTESV LE 1=L`C �..__. _ _ ... -•-._ 1j 44 tf( 1 e ! .. ...... f�+.'' r.,, e� /a �k. ^^' ::.. :: .. ' <:.,h '."f::. ...:.. ,.: .:.: .,.;, .,: k:' .: .. .. �:: ::n. �r ... � : .:... Y. .. .., ..., '� , .,.. v .. ..3�� �u`:, : : : ::..y§..:.... .. ..,-"" .-^•_, ,_. t ..s' _.,.. �l eY --7±C' s� _.. ..._. L. Y \ .:V � r✓% ,,. ✓ ". ...,:�k. �...f .:.. �.... _..n.. _.. .�<«,;.... 7i�.��.....,.. ..._ ....,: _.._. :.. ,.I' 6•� ........... : .:....... .............w.f � <- k�;•^�, S"?�.,. y':::Z++`, ..., :.. ,,.. ne.., \.:.. •;,u"" .a'•" .... n., _ / ✓� \ \\ _. _. _. �+:r° ^.•• :- --^ � ( t '- ..iii',;.. t. F _'' d "x`\. "0z^ \\ 7; ✓ f "' «_._.__,. .. �- ✓" ,� ,f, Gyp.,.. W ... ^,..„,_ : d . ..,' t d3,: f�} } t i; i:;: J /•i ,� ,.,.... _.._.,. "`,.. "\. �./' ,, Jf /'"•' r�" Wes` ....-- -.""'"'_ 0 �1 ._— W ¢ j SING STREAM f F'Ff .•� f uj ' 0 , r'. J� / t�:: :, >�: ... �.. ..:.� �,.. :,, .. ,.:.:: �' �.Y�w4.. :z'� >x,� .. r. .:.. �` -': /Jt .. 1 J 1 ✓ .._..- ..,_,.,... � ...-- // � t � � • °r ® -,.r' ':•''•.•••••••• ._.- .ra"'f°' „� `� C.: 2 LLI / ✓ ✓ CL/ /zr / ✓ f .... %f Q SEDIMENT BASIN #1 - ,f / J 1 f AREA 5.44 A.C. " ~~ . I Cw = 0.40 ' -. - • .. 1 / -✓ Te = 12 MIN N 66 r j f 4 I - :.. , . .. - —° 1 TMP 94 -15A3 _ d' LIN�ITS C F DISTURBANCiE �� `�\� \ ° ` ,'� �*.. . :... fir` 'v . " r 1 ' I "'�' i 1 f COINCID S w/ /L "PE - :.:::' Y l ' RICHARD E OTC i / co o ji( i� 1 [ t' ,� �_ 7, — °' '° ' \ x _ - %' f TACY A..AUSTiN O t d �. / i G 21,20 8C. N u„� J /` DB 45612 PG. 1$ \ to t i I yea e 1 i / ✓ C„_ SOILS DESCRIPTION (TYP.) E f -- .. __ - f/ P _. ...... ..... y g g t � _ J z i , o I v , DIVERSION CH N "L �' �" � �� � ,� 0 T �j < �, "' w 11.285 A , RES, �` _. _ _- — W 4jo ✓ j M r_ ; ....:.:::'' . :..: /tit ? t r 1 i r \ \ •v,R / t Rabb DRAINAGE 41 DIVIDE (TYP.) ° -` - i i , , y` yr t SCOTT R. COLLINSZ '•,i r' / i.? No. 35791 'tee 101VAL EIS Ln \. -- 'rj ✓` ,.r' Nlk ='r✓' LLJ LOT 16 .°.- '�~ ./-' ,/ s �'s �, 'a \, '^,,,LL -:,,, ~^`^`r,,,, 1 pp 4 'l `'L"^ ___ 4 "`^•.. .."ay„, '^�.�,. , ,x.. z LL- Z MH -13 0.759 ACRES W 0 W A ✓�: / ; a.'`•, w'..'` -'.. "O '4"" " it I 4 \^^ -". - ....'..",^- „.•.,,._ .,r �'`"`` ''''." w"` '4 �/'' .2X' z Lu , .,✓ �' � ,`. -- _..... ~` 1"w.,;,- ''"`^.a "`,,.q `-". 1r � � ' lj! \ � ~..,,,, \,,, '^ -... `'-aa,� ''t X /� �' �i' � ' O '`r J!' �,.,.,...._ ••. `a• ,,� / J J t S 1 ,h^ `--^"-�, ,^^.. .._.W...r"` z Z c� �� ,._,- w .. ,-- - /' , yt� .^-__ r,., j' /'� ,,.• -' ,,, f' %� r' j `i .A � ~ - --.._ -- -..,.. "- •.,,... �'y >�' � `y .%,;, -.: ^,.O t CA J Z_ Z \ /' "ti, f % ./ -,- /"/• ✓' f f r rr f `, """"a.. , ^^-". `"' „ r . .'_"r "` \` "- .•.,' "-- .'. ''•','ey 1 a.:''• z Q ^ L) 15 `'" - .✓"' ,✓' °.. -'"", '! Irr /' •,°` .r'` j°,,.,: ,.-"' .r' r � i � � '`^ - •• -,._,, �'` __ -..... ., `yt � r,,,.w'' r ,t? +-+ � � Ot: _•.. .__ '°".`•.' ....,� -` , / / / 'r/-' f,,, . ,, r/ ,, "^ 0. 55 A ESr ° _ %� 1'i >: ,% , •,,,,,- 4 °` = TMP a- co J _ ✓' / > i W' --.. ,.M ----._ --_ .^ '/ ,.•:'r ,, / ✓f j � t' "`` / ' ``'', � ..,, -.._, _._ ; . ",• � � �`,- °°. t : ?�; .rte 935- K2 -0A -5 N � Liu � G EGORY, M W LARY FOR o °�° SEDIMENT BASF #2 _ - _, �` ° '� : ;k" r'' W Q ✓ SE IN - ` DOROtHY s cn AREA = 6.82 AC. _ �. / �:w° 4.01 ac. W _ __. , S �° DB 4294 PG 74 r t:. ;" �, CL Cw 0.40 ` `� T � r,,r' a moo ru Tc - 15 MIN. U) TMP 93At-1 \SOILS SM CHAfbOTTESVILL�E LL µL 141 , y y �. _ >,• 48 ac. `-•.... ,..•^ � •.. ,-. .._ � 0.637 A RES t „�, � , ', t', /�' •, '�, @ 46 3P .3. �__ ! f PROPOSED TRAPEZOIDAL RIPRAP - PROPOSED RIPRAP OUTFACE N - SWM FOR DETAILS �' w/ VDOT STD. EW 1' `_ - - " % { °,.' r OUTFACE DITCH SEE w --`- _ aw - t r Ln _ - - - - ` _T_MP 93A5-K2-0A-3 W .-L f \ -� W1-4.5 W2 -23.5 L -19 D -2 - _ �- ! DC r✓ -4 ,-a � -_ f / ;: •' -' t_ SNSOVICH DEVELC3 MET LLC f : l ry PROPOSED' RI PRAP OUTFACE -- �� ° _ ✓ / ,,. w ,✓ _.-� � .. . �- �®• SOILS LINE (TYP.) t , � -''� �•, ® . . ,.. /� tp n h w/ VDOT STD. ES -1 -. -- �5 `,,t*k.'; , .: ,,.,,'`.. -. -». '" 4r, . •°., "v. -. W1=45, W2 — 14.5 r L=13', D,2 r ' �._ -. •--- .."-°. ._.__. -,,._ ____. "" _. -__ r` /f ,r''r � J ! f' " "' -/ ,,,,,,,,..4- SF •..'" ' ""`.` `..;r �` "`a„•- ""^•.a, ti'`'+ \ `^•.y L � � , n _"^ ...- --."". '„";.." '^�M1 .,.,,,, .,` ",--,: '_'y } ✓ / / f t' ! r/% f f P e. r '� .."_.� 8B3 L o .. -.,, . `�•.. . � ,4 --.. .0.7 2 ACRES DITCH ,r` ^ PS BAFFLES r f` , /` J! ,r- •;,-�": � r''', *f, ' ✓'` , ✓'' �y � � � cyi V 1 C6 L ' UNDER- ! °" - y j f , Q 'r P It- `� _:, - -- 18" RCP BARREL _. w /BALL EXISTING BIO- FILTERS TO REMAIN IN ` �, Z ' ! r U) \ , APPROVAL J 24 RCP RISER PLACE FOR AS LONG AS POSSIBLE. \ s uj \ ® \ - ' - f �_ _� _ REMOVAL MAY ONLY BE AUTHORIZED BY \ t . -''r - - _ - Ps - 1 . 1 r' A COUNTY INSPECTOR. N - - ACRES' ' 1 4W \ t ' DITCH -c s 1 f 7. [/'� ]' 1 1 .. "^`a", ^' �•' J . +. r 1 / s'°,"" .,`""'.% of J \ /i1 i t .� \ .7f ` , "+ t. �� 'f - s •°""„T ' °— -.. ._.. —.-`" ' \ ,.,,...,, —..._ . -,° \ /' /Y ,/' ( X C0 l , s ' t d J r / l I— 3 '.? • .:T.,.;..::i�:+;`w`� +w.tti•.,G / t LLJ -c SOILS DESCRIPTION (- I-YP.) � 0.727 ACRES / �, r f \ / { DRAINAGE __ , ,%r E DITCH `F / % ' -'' c' Q DIVIDE TYP. A -K2* A 3 c H � ND ;- �. /TMP 93 5 {? r RTE AS OU AREAr'U ,� / -. -.'ry' '''''' ANSOVICH DEVE PMENTtLC r .✓' !� N TEDI ENT N a % s �- " ,<,. tA OF DIVERSIO �O A`SI ,° `'� -- r PS /' L c� •, .'�`�. , r ,--- ,�, � 4.02 a�. ,✓ /' � c `'� [,. /•` 0.688 ACRE ',.- .. ,� // (fJ /%/ � [tj f, w OU, 0.80 C / LL v >,7= I r f /' _,.. _ n,���•`` ,A EDIMEN BASIN r �. J S T AS N #2 � }[( Cn /f 1 ✓ # �w . e z :. AREA 3.57 ac. C�T �. • -... -': •'.'•. ::•:•. �, :;..;,.•::.v . ;� 6aCCCESS ROA K� SEDIMENT . � ,h.: .--� Ljj LL w . F Cw ° 0.40 .- f ! �`_.,,:• HA L SERVE AS CESSjTO � .�' f BASIN S / .,�s ,�.,,�'' PHASE B LIMITS OF r �` ,t 1 ,.S•: �'•�� G f /' � t Iii z s f- 1 w i' t >•. T M ✓ ,%" , -- ' • ' � c 9 5 IN. / ,,., -- , e_ , E. TAE: r � \ . .' � AREA DUM�PSTER ,� --- UEL G r ; ; ' DISTURBANCE. TO t ;, .� � / �.:.,_..- - ( - ++ f.;'c + + I— c i s ✓ i , TA WASHO P R � N I�E TE & oc U r I w rt t _ __ I- R _ �%NTI[�CT o � ;'..0 � (jf i r - X \ c , ac. LOTS 7 6 -8.40 r _ f a ( } r 1 OTT S, ALL O WHICH ARE UPLAND PS -�. ' ,, r° J < ,✓' --- U) > P'ORT�► -POTTY LOCAN l� ,✓P tf` � ,/' � I l r'� r / / ( r i F THE DI- VERSION INTO T1-,IE I ,��•, � r /� r ,j°t ! uj / c /( I- fjf /��f d I (s)A)■ J /f/f l CONT TOR �' f ,'�'" 0` TS f B I % NT Aga I S EDIM� .� f r N�' t r f / w i / f \ \\ e f 1 :� t A I / r G AREA ' ,. • _ F ELI -`M`�. .r -�•: -, : �:.,;,.,•. f U a r 1 ./F GP H I� C LE 1 CONTR� ra-- t� _ - �.. f / r j Ij r r IN EE c / STAGING AREA LN Y•r•` n' f tr 40 0 40 80 0 r' rr r r a ::s..'`� 4 w , Xo 15 r �. BARE P RY 15 CMP SU TEM R� t u.V %.F n r::zor . � 3 f I - ....,2: � it ,,r t,'! ' :2c. Tc -5 min. Cav =0.90 • '� f - / / t o t` 1 i ch f . nl r� / I• P / r l r ,•,' t / !r 1: j i I i� / •T PROPOSED-" rl a 'NOTE: HE PROP E � -_.- ION p CON ST C CONTRACTOR S t TRA ON , A 1 L r `� : :,.'::.;: ::. ::;::::'::`.: '::: ,w_ ' r i PLAN HAS BALANCED R-lom ENTRANCE (12 l / /r -�- '`� , / W x70 IN) w/ _ � ; f �� TEMPORARY 15" C P FOR ,! �_ .__ .. �r �t r / TE ____�`- `�� �. � f ;' r ! %� ,.x � EARTHWORK AND A '� � f � .,� .- �...., �g i,✓ t✓` ,,r � rr nn � z _-- - °° . ' t,�/ tr' % '' r STOCKPILE LOCATION ✓` / ' °`' ' r' ' °� V s SEDIMENT BASING DING. SEE �__ --` -. 1 /✓ r t IS NOT REQUIRED. f' /° ,, �,- ; ` /✓ ! SHEET 6 FOR CULVERT �� TMP 93A"--OA-1 ; 1 TMP..93'A6*2' -OA -2 , fff /' f f / /��f f - 1 J JOB NO. c ,/ t'� / / / '' '' - r c CALCULATIONS. NISL1✓Y, ROGERbR SALLY sANSC�VI6H DEVELOPMENT LLG / /i t ,� t t' , r r f / yl �/, e' ` .'' 'F t t I oZOS4 S&Ls ` D 461 O PG. 5201` 3.75 ac , /' f r f% t .'' t/ ' / '' f i`/ ! / p , ' / /' ,o' r f' % c SCALE c TYPE X, t / ` / ,r' % C I f f / SHEET NO. u r F1992 3.20 Source: Va. DSWC Plate 3.20 -1 TEMPORARY DIVERSION DIKE Compacted Soil Nan- Erodable Liner 18" min. F- --Flow 4.5' min. SOURCE: VA. DSWC PLATE 3.09 -1 1,992 TABLE 3.32 -1) SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AM Total Lbs. F?er ASc>�. Minimu -m- Card L wn _ Commercial or Residential 17$ -200 lbs. - Kentucky 31 or Turf -Tree Tall Fescue 95 -100% - Improved Perennial Ryegrass 0-50/6 - Kentucky Bluegrass €i-5% High - Maintenance lawn 200 -250 lbs. - Kentucky 31 or 'Turf -Type Tall Fescue 1000/0 General Slppq f3.1 or I w - Kentucky 31 Fescue 128 lbs - lied Top Grass 2 lbs. Seasonal Nurse Crop* 2.0 lbs. ISO lbs. - � lvlauuterlartce Slope �Sdeep*rr Than. `l „11 - Kentucky 31 Fescue 108 lies. - Red Tops Grass 2 lbs. - Seasonal purse Crop * 20 lbs, - Crownvetch '" * A ISO lbs. Use seasonal nurse crop in accordance with seciting dates as state. d below: Februa.ayy 16th through April ...... . , Annual Rye May ist through, .August 1,5th . > : ........ . . . . . > > . _ , Foxtail Millet August 16th through Octo r , , , , , , , , > , Annual Rye November through February 15th , ......... Winter Rye Substitute, Sericea lespedez for Ciownvtwh east of Fatrmville, Va., (May through September use hulled Sericea, all other prerioa s, use unhulliod Sericea),. If Flatpea is -rased in lieu of Crowrwetch, increase rate to 30 lbs./acre. All legume, seed must, be properly inoculated. Weeping Lovegrass may be added to any slope or love - maintenance mix during warmer seeding periods; add 10 -20 lbs. /acre in mixes. • •' A • 1r SIGNS REAP-fNG • .. .•,X`•``- QUICKSAND KEEP • / ,,• r t� r RIPRAP duTFALL W:L= S', Wz= 14.5, „L i3', D =2' F-1 I I I I I- -3 "-' f VDOT CL. 11, EC -a, E IPRAP 4NED SPILLWAY w/ f r 7 1111 I I I ; GEOTEXTILE FILTER FABRI J C / �� ,r UNDERLAYM NTTO o' ^� �J�. ,� ; yv� XTEND TO TOE OF DAM. III -III UB i _BAFFLE j 11 l RCP 1 =III -I a RCP�A ER I lit -III- RREL 1 l t � �: i�•� 11 III \ -t SEDIMENT BASIN #2\ 111 =20' 41504 Sediment Sediment emwal Sediment should be removed from behind the check dams where it has accumulated to one half of the original height of the dam. Plan Sheet. No. SPACING BETWEEN CHECK DAMS" Sheen 9 of 1 L = THE DISTANCE SUCH THAT POINTS Rev. Dal Date 615M5 EQUAL EL ELEVATION A AND B ARE OF � E drainage area (acres) AHW Controls i� r1 � DESIGN Rica{ WATER Source: Va. DSWC Plate 3.20 -2 LD-269 Rev. 3-33 Projed Glenrnore Lots 1 -16 Plan Sheet. No. Designer FGM, PE Sheen 9 of 1 Conskudion Entrance Culvert near Lot 9 Rev. Dal Date 615M5 7O' MIN. drainage area (acres) AHW Controls STATION:_ DESIGN Rica{ WATER HYDROLOGICAL DATA D.A.= 029 ac ' NP-6' 100 yr. Fioodptain elev. - AGGRE"TE 8i4SE E�asT+NG Design AH'Al depth elev. 7D' MIN. Structures elev. freq. - Thlelev. Temporary 15" CMP Construction Entrance Culvert (Adjacent b Lot 9): ASPKW PAW WASIOACic EDGE OF PAV"T Cw - 090, To - 5 min., 12 - 5.2 in/hr, 110 - 6.7 lnlhf 125= 7.5 irtlhr Shaukler - • caw • s'ttigAlrE `: . r 12' MIN. elev. 763.7 _ "•� 252.0 Exist No PAVEMENT CL elev. 763.4 DISCHARGES USED RISKASSESSMENT Q 2 = 9.36 CFS Detours Ava ilab ADT te Length Skew � Gra ver Q 10 = 9.75 CFS Overtopping) Stage ELEVATION IS 4.0' PLAN VIEW 340.00 Q 100 = 2.15 CFS Flood Plain IMan enrent a9 hiv. El 362.2 So= 4.1% Inv. El 360.$ Q CFS Q - CFS C r iteria and S > ni t €n ad ©� . Gr. Elev. L - 32 Orig. GT. Elev. CULVERT TYPE &SIZE Q 01B HEADWATER ATER COMPUTATIONS 2X,,,,o,,, CONT. HW. ELEV. OUTLET VELOCITY Treat COMMENTS I INLET T. OUTLETCONTROL HINID HW Ke I do JL 2 ho H LSo HW C.M. Smooth Temporary 15 *CMP 2 r 1.36 1.36 0.4 0.54 0.9 44 0.83 4.83 01 1.3 0.4 362.74 185.4 1.2 NIA cleanout elevation (ft) Temporary 15' GMP 10 r 1.75 1.75 0.72 0.64 0.9 0.5 0.88 0.88 0.1 1.3 0.6 362.54 3:1 1.4 NIA colors Temporary 15' CMP 100 yr 2.15 2.15 0 :72 0.71 0.9 1 0.8 0.93 0.93 0.1 1.3 1 07 0.71 1 2yr 4.1 Q 2yr 1.5 N1A 36 125yr 5.0 Q 25yr 9.42 nurrser collars required L t we (baffles not required if > 2) 3.58 dimension of collars 3.5 x 15 collars, YES runoff: u available head (ft) depth of water at spillway crest (€t) 9 -0 C (use 0.45 for bare earth) diameter riser (in) 0.4 slope of upstream face (Z :1) 2:1 is (mein) 9.42 12 slope of barrel (Sb) 1.14% 12yr 3 :9 Q 2yr 8.49 length of barrel in saturated zone (Ls) 5023 t 25yr 6.5 Q25yr 15.56 number collars required 2 33975 diameter of barrel (in) 18 dimension of collars 4.5 x 4.5 principle spillway (in dam): W/ emergency spillvay_(riser) YES required capacity (Q25 -Cp) (cfs) 15.6 available head (ft) 1.0 bottomwidth (ft) 20 diameter riser (in) 24 slope of exist channel (ft/ft) 19% diameter crest elev. (f L) 301 winirtTSm.length of exit channel (ft) 33 spillway capacity, Qp (cfs) 0.00 crest of spillway (ft) 300.50 diameter trash rack (in) 36 Design Flood Exceed, Prob, Elea. barrel length (ft) 88 Overlap Flood Exceed. Prob. Elev. SUMMARY & RECOMMENDATIONS: head on barrel through errbankn 12.0 Base Flood 1% Exceed. Prob. Bev. r 4h' 9 1 r� �...- ,r� SEDIMENT BASIN #i \ I 111 =20' ATTACH FILTER FABfr TO STAKES OR POS1 EXTEND IT INTO 7RE1 - WOODEN STAKE STEEL POS� LENGTH = 5' MIN. •si eeee EXCAVATED SOIL essee BACKFILLED AND • n COMPACTS • »e D 4 7x4" TRENCH SIL T FENCE sF ZWI THOUT WIRE SUPPORT, NO SCALE ALBEMA111U COMP CONSTRUC nON EN'T'RANCE u TO SEDIMW 90M°c CRESt Cr" CtEtrGT 5PIttwTY 7O' MIN. drainage area (acres) �� ��� >h"AT �. s" Sal -2A AM WALT roe► MUR5¢ DESIGN Rica{ WATER 2X -0- ,,.,,.13 Amq I.Si1NG PAVEMENr ' NP-6' 21A oo:cH• SiQE ELEVATION AGGRE"TE 8i4SE E�asT+NG volume (cy) GROUND 7D' MIN. 910.0 4 EX. CURB OR ASPKW PAW WASIOACic EDGE OF PAV"T 1691 .4 94.9 t152.6 • caw • s'ttigAlrE `: . r 12' MIN. . • 296.00 "•� 252.0 Exist No PAVEMENT D11rERSWN DRCH MINIMUM WItiTN AT rosenvllt o AWACc 'IwtAppp DEWIE 298.00 3584.4 DESIGN WATER ' war =WE ..._ _ ELEVATION IS 4.0' PLAN VIEW 340.00 MUST EMEND FULL WIDTH OF 784.9 INGRESS AND EGRESS OPERATION =RAN' 1 /2" WATER TO T MATH FROST 302.40 12' MIN. PROOF HYDRANT X wet storage required (cy) (67 *DA) ABOVE GRADE AND 4' 2X,,,,o,,, OFF EDGE OF PAVEMENT. SECTION A -A 335.50 NOTE: A MINIMUM WATER TRAP OF I- IS REQUIRED 341.00 WITH A MINIMUM WASH HOSE DW OF 1.5' 372.8 PAVW TWP CMT E!V]'R g sr.� ors available volume before cleanout (cy) (34 *DA) -' ;. CO- KTRACTOR SHALL INSTALL SIGNS READING rT"'A RING, QUICK SAND, KEEP O LONG. THE��OSED FENCE.,,- f x VDO'T CL EC -1 RIPRAP�RED SP LWAY w/ GEOTE�ZTILE TER FABRIC UNDf�RLAYMEN TO EXTEND TOE OF D 3 0 I--," r E6 .- Sediment Basin #1 Design u ArAr.1'N4 SPAJVAVY M WiTMOUT CRESt Cr" CtEtrGT 5PIttwTY Min, f Wi WITHOUT •f C gr EMERSiEYF9 2' $ 1t )YAy drainage area (acres) �� ��� >h"AT �. 5.44 DESIGN Rica{ WATER basin volumes, (using 2' contour intervals) elevation (ft) contour area (sf) volume (cy) �n.S. elevation (ft) contour area (sf) volume (cy) t ar 292.40 910.0 4 4W JAr - - - - - - - - - -- -- - 294.00 1691 .4 94.9 t152.6 • caw • s'ttigAlrE `: . r RISER CMr . • 296.00 2582.0 252.0 nxr^ STORAa oewaTeaac 298.00 3584.4 479.3 ' war =WE ..._ _ 340.00 4692.0 784.9 z TO 302.40 5902.4 t176.4 wet storage required (cy) (67 *DA) 239.2 design high water (ft) 339.75 dewatenng orifice elevation (€f) 335.50 6CiM6tfr #m*rt PAINT ^ EYE tlC10Eb 341.00 wet storage provided at this elevation (cy) 372.8 top width of dam (ft) To a- CS'•fy available volume before cleanout (cy) (34 *DA) vet storage: bottom of basin (ft) 334.4 cleanout elevation (ft) 334.50 wet storage required (cy) (67 *DA) 49 x 941' 364.5 design high crater (ft) 301.00 dewatering orifice elevation (ft) 296.94 top of darn (ft) 302.00 wet storage provided at this elevation (cy) 364.5 top width of dam (ft) 6,0 available volume before cleanout (cy) (34 *DA) 185.4 bottom of basin (ft) 292.00 cleanout elevation (ft) length of flow, L (ft) 295.11 approx. bottom dimensions 21'x 79 distance fromcleanoutto orifice (ft) (> 1') 166 1.88 upstream face slope: 2:1 4,39 diameter of flexible tubing (in) (orifice +2 ") 6.0 downstream face slope: 3:1 dry storage: colors YES runoff: dry storage required (cy) (67 *DA) depth of water at spillway crest ) 364.5 baffles: NO principle spillway crest (in darer) (ft) 2:1 300.50 length of flow, L (ft) 129 dry storage provided at this elevation (cy) 1 2yr 4.1 Q 2yr 5183 effective width, We (ft) 36 125yr 5.0 Q 25yr 9.42 nurrser collars required L t we (baffles not required if > 2) 3.58 dimension of collars 3.5 x 15 collars, YES runoff: u available head (ft) depth of water at spillway crest (€t) 9 -0 C (use 0.45 for bare earth) diameter riser (in) 0.4 slope of upstream face (Z :1) 2:1 is (mein) 9.42 12 slope of barrel (Sb) 1.14% 12yr 3 :9 Q 2yr 8.49 length of barrel in saturated zone (Ls) 5023 t 25yr 6.5 Q25yr 15.56 number collars required 2 33975 diameter of barrel (in) 18 dimension of collars 4.5 x 4.5 principle spillway (in dam): W/ emergency spillvay_(riser) YES required capacity (Q25 -Cp) (cfs) 15.6 available head (ft) 1.0 bottomwidth (ft) 20 diameter riser (in) 24 slope of exist channel (ft/ft) 19% diameter crest elev. (f L) 301 winirtTSm.length of exit channel (ft) 33 spillway capacity, Qp (cfs) 0.00 crest of spillway (ft) 300.50 diameter trash rack (in) 36 barrel length (ft) 88 head on barrel through errbankn 12.0 diarter of barrel (ire) 18 diameter of dewatering orifice (in) 4.0 diameter of flexible tubing in orifice +2" 6.0 Sediment Basin #2 Design u ArAr.1'N4 SPAJVAVY M WiTMOUT CRESt Cr" CtEtrGT 5PIttwTY drainage area (acres) 3.57 �� ��� >h"AT �. � basin volumes: (using. Z contour intervals) ,) elevation (ft) contour area (sf) volume (cy) �n.S. 334.00 5687.0 0 336.00 7794.0 437.4 � ' rnsea CRiST . 33&00 9950.4 t152.6 • caw • s'ttigAlrE `: . r . • F 340.00 12272.0 1974.9 WEr• 51OME ,:, , ......Y 341.00 13414.0 2449.6 LU ..._ _ V WT STC�U65E PrNIX11 7•., SONMENT CLEAnCUT P T z TO wet storage: wet storage required (cy) (67 *DA) 239.2 design high water (ft) 339.75 dewatenng orifice elevation (€f) 335.50 top of dam (ft) 341.00 wet storage provided at this elevation (cy) 372.8 top width of dam (ft) 10.0 available volume before cleanout (cy) (34 *DA) 121.4 bottom of basin (ft) 334.4 cleanout elevation (ft) 334.50 approx bottomdimensions 49 x 941' distance from cleanout to orifice ( €t) (> V) 1.40 upstream face slope: 2 :1 downstream face slope: 3:1 dry storage ® dry storage required (cy) (67*DA) 239.2 baffle s: yes principle spihway crest (ft) 338.75 length of flow, L (ft) 655 dry storage provided at this elevation (cy) 1487:3 effective width, we {ft) 166 i d ameter of dewatering orifice (ire} 4. 0 > l we .baffles not required rf 2 L ( eq ) 4,39 diameter of flexible tubing (in) (orifice +2 ") 6.0 colors YES runoff: Co depth of water at spillway crest ) 4.75 C (use 0.45 for bare earth) 0.4 slope of upstream face (Z:9) 2:1 tc (non) 9.5 slope of barrel (Sb) 0.50% 1 2yr 4.1 Q 2yr 5.85 length of barrel in saturated zone (Ls) 29.48 125yr 5.0 Q 25yr 9.42 nurrser collars required 2 dimension of collars 3.5 x 15 principle spilwa m u available head (ft) 1.0 emergency spillway: YES diameter riser (in) 24 required capacity (Q25-Qp) (cfs) 0.0 spillway capacity, QP (cfs) 9.42 bottom vkdth (ft) 22 diameter trash rack (in) 36 slope of exist channel (ftlft) 6% barrel length (ft) 64 minimum length of exit channel (ft) 35 head on barrel through erribankment (ft) 9.43 crest of spillway (ft) 33975 diameter of barrel (in) 18 V \\,/\ N RIPRAP OUTFALL WIT / VPOT STD. 6W -1 / W2=4.5', 72= 23,5', 1-73.9% D ll N x B�FFLE Le rn r' VIII ITl� Lr)l f / SEDIMENT TRAP #3 111 =20' TH QP Vl I NJ SCOTT R. COLLINSZ U No. 35791 11'.. ��O , f q lff ��' A�S' IONAL � 0 w In In L In r-1 T4 zi -I " - er v Z 1. SET POSTS AND EXCAVATE A 4 "X4 2. STAPLE WIRE FENCING TO THE POSTS. ' U TRENCH UPSLOPE ALONG THE LINE U OF POSTS. N F- Ul F- se, W z 5 L1J (o Z 7 U..1 Cr. CO U C;6 -LI I- - I- - MJ 0 _ - = III =III -- I- FLOW -I =1 I I- 4 , W e..� J. ATTACH THE FILTER FABRIC TO 4. BACKFILL AND COMPACT THE Iy W THE WIRE FENCE AND EXTEND EXCAVATED SOIL. O IT INTO THE TRENCH. 0 C) U.J ?Qi.S f• .h fY \ `\\. ,•sic. �..� <:.�,, � .�� k � `�.,..�, .ter / /�/� ., . _ �... `... .•>-'f ""}``�`KV� " � }: ,`. `t � / -./ .,.+^^ ' IrN'1i>iS :.Y� +• ��n,:, $ '�'.. : ,`kxn , ! � ' • •.. W LU � UJI r•- III -i I I, ; I FLOW ,,... 'r CL X013 NO. N �I I��ILiII I -I�f -III. �It�11I1 =ij1- 102054 EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. SCALE sF SILT FENCE NIA (WITH WIRE SUPPORT) SHEET No. NO SCALE 6 u V a � w F LU z z W C z C z o W u ® 1- 6 e 5 ® `u Z ® Co a m u U) a a H LU a LLI� CL a W/ a � ce t U w In In L In r-1 T4 zi -I " - er v Z 1. SET POSTS AND EXCAVATE A 4 "X4 2. STAPLE WIRE FENCING TO THE POSTS. ' U TRENCH UPSLOPE ALONG THE LINE U OF POSTS. N F- Ul F- se, W z 5 L1J (o Z 7 U..1 Cr. CO U C;6 -LI I- - I- - MJ 0 _ - = III =III -- I- FLOW -I =1 I I- 4 , W e..� J. ATTACH THE FILTER FABRIC TO 4. BACKFILL AND COMPACT THE Iy W THE WIRE FENCE AND EXTEND EXCAVATED SOIL. O IT INTO THE TRENCH. 0 C) U.J ?Qi.S f• .h fY \ `\\. ,•sic. �..� <:.�,, � .�� k � `�.,..�, .ter / /�/� ., . _ �... `... .•>-'f ""}``�`KV� " � }: ,`. `t � / -./ .,.+^^ ' IrN'1i>iS :.Y� +• ��n,:, $ '�'.. : ,`kxn , ! � ' • •.. W LU � UJI r•- III -i I I, ; I FLOW ,,... 'r CL X013 NO. N �I I��ILiII I -I�f -III. �It�11I1 =ij1- 102054 EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. SCALE sF SILT FENCE NIA (WITH WIRE SUPPORT) SHEET No. NO SCALE 6 OW 4 THf0 SCOTT R. COLLINSZ ,U No. 3y5791 O �Nl•- SIONAL E��1 o - > >> \ ♦. w ♦ cn Vr \ i - to _ _ �► F7 > 111y Aft �► '� �► \ LU Uj a _ \ - �� 1 ,: _ °� CTP APPTC AT R li ., _ .- . , � (PROPOSED LEVEL SPREADER S RMWA TER DETENTION PLAN 10 YEAR ! \ BE o.e• DEEP (s1o. + / j� SCHEMA NOT TO SCALE) �� Rlom uP / I AND SHALL BE LEVEL T Q o Q Z H ° U_ ° c W 42 a 0 N N E E E E U 0- O O ° ° ° O O N N p WIW- p Z V D 5 ° W W W a a a 0 � Remarks 0- a m a- a° Drainage Area #1A IL 2.88 - 3.19 Pre -Dev. > Post Dev. Drainage Area #1 B 9.42 11.26 2.90 4.05 - 11.26 > 7.33 Drainage Area #2 9.42 25.67 3.64 - 0.09 25.67 > 17.19 Drainage Area #3 6.82 8.76 1 6.82 - 5.21 Pre -Dev. > POSt Dev. o - > >> \ ♦. w ♦ cn Vr \ i - to _ _ �► F7 > 111y Aft �► '� �► \ LU Uj a _ \ - �� 1 ,: _ °� CTP APPTC AT R li ., _ .- . , � (PROPOSED LEVEL SPREADER S RMWA TER DETENTION PLAN 10 YEAR ! \ BE o.e• DEEP (s1o. + / j� SCHEMA NOT TO SCALE) �� Rlom uP / I AND SHALL BE LEVEL T Ln Q d- Q N n L9 O r- M M O N M d' V.V1„1 . 100 YEAR it FINAL Tc= 21hrs. � i N _ 4 J► cP �\ o_. O r IN "i► E HOU CS CALCULATIONS s a FLOOD PLAIN �� SE 2 , 9' \ ` _ ' R ION FO R ADDITION DETAILS � 100 1 S TREAM BUFFER / , . 1 1 � \ / `... SEE APPROVED COUNTY FACILITY TO H AVE A SW � r !► , _, �' \ , �► Q 1 &CHANNEL +� ,'' CONNECTION TO CARROLL C EK ROAD FILES FOR MS g �,►�''' �► qp / WITH CON ' ®► er _ ♦ ! T _ ADEQUACY CROSS SEC .. ACE. „ '► \ ,�- AND MAINTENANCE <, FOR ACC � \ � , O 1 ,x CALCULATIONS. \ \ AND CALCULA O a C ® - , t ♦ J EXTENDED DETENTION FACILTY #1 D.A. # - �'' y o � / EXISTING STREAM SHALL _ , EE SHEET 8 FOR DETAILS ''�' 1 CONTRACTOR sHA ® __ � , o ,. ' S ., / _. I _ _ ..6.82 ac. � ♦ , 7i �d 4 _ - AL RIPRAP DITCH FROM THE I co _ a TRAPEZOID I \ _ Y ICES FOR PPR VED COUNT F TC 0.21 hrs SEE APPROVED .. # TO THE HEADCUTOF _ '11t "� .a � / _ ., OUTLET OF SWM , .. /: ; Y EXHIBIT& _ C� , CHANNEL ADE . T TREAM USING INTERMITTEN 5 N THE EXISTING C L9 WM FACILITIES TO HAVE SWM EASEMENTS 1�ITI NAL S , . REPORT FOR ADDITIONAL \ CL. TYPE 4. M� 19 VDOT STD.. EC C I �► _ z A r NS . cuLATlo K ROAD , DETAILS cAL CONNECTION TO CARROLL CREE O _ / WITH CONNEC ! , #4 ER FABRIC UNDERLAYMENT. #A ,X SEC GEOTEXTILE FILTER ,-- : r _ , _ DEPTH OF DITCH z \ _ M WIDTH z D MAINTENANCE 1 ,, , - (BOTro ♦ FOR ACCESS AND MAINTENA Q2=7- 8 cfs J 75 / r . RAP DITCH _ . O - , . _ OF STONE z _ \ i s -s &DEPTH DE SLOPES ) 4 _ G r S '� � Db 1-36 ft. _ ♦ , - LL n o78 >, !1 '� \ .. .. X SEC #3 s- 4 INV. 5 / \ 33 _ 2 Uj L .. z 2 _. 45 3 4 _. � 'lam _ 19 _ MS - inns 1s _ +► _ � Y as _ ♦ - XSEC #2 X C 1 _ i_ a. -._ -� � .:., _ CL III RCP RISER 8� BARREL FROM ;- .::. tt�' _ - W _. __ - SEDIMENT BASIN TO REMAIN i 4 Ul r_, / P SHEET FLOW Tc o.l hrs. TO G S 7 _ � ♦ __ � F., , . IN PLACE AND CONVERTED ar ®► R C� / 1 o w ELEV. _ � � .. �. , 0 0 i _. 4 � » SYSTEM FOR THE � / 4) �:_ ,. > , .�, � _ _._ � n ,_ . , ,:. THE OUTFACE SYS O _ ? o� CONC. FLOW Tc o.o hrs. - ___ -__ L 3 _ ♦ -� PROPOSED EXTENDED DETENTION, / _ w _ � til■� o D �` FACILITY TYP. l-'- . _ hrs. _ W T FLOW Tc o.11 +aw, hr s. SHEET _ ._ _ � n .�� FINAL TI: o.2o s _ o _ � _ _ ♦ DIRL�'_TING • _ DITCH , ._- -- -.-. ., � , ,.. �� = �- \. ♦ , �,. a W FL W Tc o o s -� � _ _:. _ ! f SEE 24 HOUR SCS CALCULATIONS CONC. O �� <.,.. ,.K _ Y n r RUNOFF TO EXTENDED / _. _ �Ir hrs. err L DETAILS W Tc o _ , ADDITIONAL CHANNEL FLOW , FOR C a _ _ .� ,. , <, a „� � _ EXTENDED DETENTION FACILITY #3 d� , ally_ N A )CITY #2• � J _ 4M` ; = FINAL Tc o.�.6hrs; _ � � .. .:. x,._ SEE SHEET 8 FOR DETAILS - ; 1 NS w LAT O R CS ALCU � » SEE 24 -HOUR 5 C as +lr _ it - jr , S / !► _ \> Q TIUNAL DETAILS _� DETENTION FACILITY #2 -•�` :_, f. ' r : � W / EXTENDED D j _ R DETAILS EE SHEET 8 FO D S ^ - . t, sue+ i NOTE. \ n;, 1. . y r THE THREE EXTENDED . w „ a . , �. Vial 1�_ , _ H", , ! RA _m . r i o -.,. - R Sd ` , %. �D Y VOLUME. FOR EVIDENCE OF THE .� .' x THE WATER QUALITY o ITH 2 � y QUALITY VOLUMES &DETENTION ^ WATER QUALITY WATER Q „�.,, �;, � 'A & General construction notes for Storrnwater Management ement tans , SHEET AND THE FOLLOWING SWM DETAILS g P ,,. COMPLIANCE PLEASE SEE THIS SH �` % of maximum d density CALCULATIONS. 1. All dams and constructed fill to be within - - - / 95 dry Y o material to be approved b !! \ ♦ , and z /o of Optimum moisture content. All fill a o p PP Y \\ \ ,d .� '�'' � \ - ' , BE AT /o COMPACTION SPILLWAYS ARE TO , � F` , LEASE NOTE THE SOIL AROUND THE SP 95 P during otechnical engineer. A eotechrncal engineer is to be resent du i / EMERGENCY SPILLWAYS age g 9 9 P 9 , \\ WITH AN IMPERVIOUS CORE AND CUT OFF TRENCH. THE EMERG / _ of dams. s _ GRAPHIC SCALE ARE TO CONCRETE OR GRASS LINED AND DOWNSTREAM OF THE SPILLWAYS ARE TO construction ��bb r / 11► :, - ED. THE FOREBAY SPILLWAYS SHALL BE CONSTRUCTED OF GABION ants are to be watertight within stormwater _ BE GRASS LINED. 2. Pipe and riser joints g � `�, _. _- , �+a°�>- _ p 1 \ ;,, FL W Tc= o.l hrs. ao so Aso i' szo _ ,- ,_. SHEET O 5 ; so o BASKETS WITH �" STONE STONE ON THE UPHILL SIDE OF THE WEIR. - s mans ement facilities. g \, \\ ♦ .. \ ---_ - _ , _. -» � GONG. FLOW Tc= o.ohrs. n or basins which are to be converted to - - - LACE FOR AS LONG AS 3- For temporary sediment traps ALL EXISTING BIOFILTERS SHALL REMAIN IN P � �y \_ -• � -- e� , - -� CHANNEL "FLOW.Tc = o.ohrs. ADDITIONALLY, A � �-- !t %'�" Went stormwater management facilities conversion is not to take rte\ ''` - FINAL Tc= o.lfshrs: POSSIBLE DURING CONSTRUCTION. perms g ♦ a 0 „r �" / ( IN FEET \_ °s ae rrw erl -- SEE 24 -HQUR SCS CALCULATIONS place until the site is stabilized, and �, _ OR ADDITIONAL DETAILS 1 inch 80 ft. ALL LOW -FLOW ORIFICES ARE DESIGNED FORA 3o HOUR DRAWDOWN TIME FOR n obtained from the Count erosion control ins ector. TWO TIMES THE WATER QUALITY VOLUME IN ACCORDANCE WITH DCR'S VSMH. permission has been y p z <t CL U) 6 o c6 U z w o' w Z U) - z -0 W z w 0 z t � o 1 � o Z L WU N Q � C O E U L w 0� V 0 3 3 v) Z v) -6 Q x U o �_0 L � 0 w � 3 0 Q O 6 N �0 .o U Z 0 w Z w O z U O U) L Z, w -6 J 6 o -- \./ o TO W a o U) / , 7 O U � O -3 L L Q � W N C J 0 U _x O U x � L o z u)� W E U O t) 1- rn LU 0v = d to a U N JOB NO. ° Q) 102054 SCALE 6 3 AS SHOWN 6 Q SHEET NO. a)Q 7 � a Q Z H Z's W Q Z w ° c W a 0 W 42 a 0 a of a E O 3. O W J OCR > WIW- W° Z V D ° _ ° W W W o a m a 0 IL Remarks Drainage Area #1A 2.88 - 6.81 Pre -Dev. > PostDev. Drainage Area #1 B 9.42 25.67 2.90 9.06 - 25.67 > 17.19 Drainage Area #2 3.64 - 1.32 Drainage Area #3 6.82 19.91 6.82 - 9.25 Pre -Dev. > PostDev. Ln Q d- Q N n L9 O r- M M O N M d' V.V1„1 . 100 YEAR it FINAL Tc= 21hrs. � i N _ 4 J► cP �\ o_. O r IN "i► E HOU CS CALCULATIONS s a FLOOD PLAIN �� SE 2 , 9' \ ` _ ' R ION FO R ADDITION DETAILS � 100 1 S TREAM BUFFER / , . 1 1 � \ / `... SEE APPROVED COUNTY FACILITY TO H AVE A SW � r !► , _, �' \ , �► Q 1 &CHANNEL +� ,'' CONNECTION TO CARROLL C EK ROAD FILES FOR MS g �,►�''' �► qp / WITH CON ' ®► er _ ♦ ! T _ ADEQUACY CROSS SEC .. ACE. „ '► \ ,�- AND MAINTENANCE <, FOR ACC � \ � , O 1 ,x CALCULATIONS. \ \ AND CALCULA O a C ® - , t ♦ J EXTENDED DETENTION FACILTY #1 D.A. # - �'' y o � / EXISTING STREAM SHALL _ , EE SHEET 8 FOR DETAILS ''�' 1 CONTRACTOR sHA ® __ � , o ,. ' S ., / _. I _ _ ..6.82 ac. � ♦ , 7i �d 4 _ - AL RIPRAP DITCH FROM THE I co _ a TRAPEZOID I \ _ Y ICES FOR PPR VED COUNT F TC 0.21 hrs SEE APPROVED .. # TO THE HEADCUTOF _ '11t "� .a � / _ ., OUTLET OF SWM , .. /: ; Y EXHIBIT& _ C� , CHANNEL ADE . T TREAM USING INTERMITTEN 5 N THE EXISTING C L9 WM FACILITIES TO HAVE SWM EASEMENTS 1�ITI NAL S , . REPORT FOR ADDITIONAL \ CL. TYPE 4. M� 19 VDOT STD.. EC C I �► _ z A r NS . cuLATlo K ROAD , DETAILS cAL CONNECTION TO CARROLL CREE O _ / WITH CONNEC ! , #4 ER FABRIC UNDERLAYMENT. #A ,X SEC GEOTEXTILE FILTER ,-- : r _ , _ DEPTH OF DITCH z \ _ M WIDTH z D MAINTENANCE 1 ,, , - (BOTro ♦ FOR ACCESS AND MAINTENA Q2=7- 8 cfs J 75 / r . RAP DITCH _ . O - , . _ OF STONE z _ \ i s -s &DEPTH DE SLOPES ) 4 _ G r S '� � Db 1-36 ft. _ ♦ , - LL n o78 >, !1 '� \ .. .. X SEC #3 s- 4 INV. 5 / \ 33 _ 2 Uj L .. z 2 _. 45 3 4 _. � 'lam _ 19 _ MS - inns 1s _ +► _ � Y as _ ♦ - XSEC #2 X C 1 _ i_ a. -._ -� � .:., _ CL III RCP RISER 8� BARREL FROM ;- .::. tt�' _ - W _. __ - SEDIMENT BASIN TO REMAIN i 4 Ul r_, / P SHEET FLOW Tc o.l hrs. TO G S 7 _ � ♦ __ � F., , . IN PLACE AND CONVERTED ar ®► R C� / 1 o w ELEV. _ � � .. �. , 0 0 i _. 4 � » SYSTEM FOR THE � / 4) �:_ ,. > , .�, � _ _._ � n ,_ . , ,:. THE OUTFACE SYS O _ ? o� CONC. FLOW Tc o.o hrs. - ___ -__ L 3 _ ♦ -� PROPOSED EXTENDED DETENTION, / _ w _ � til■� o D �` FACILITY TYP. l-'- . _ hrs. _ W T FLOW Tc o.11 +aw, hr s. SHEET _ ._ _ � n .�� FINAL TI: o.2o s _ o _ � _ _ ♦ DIRL�'_TING • _ DITCH , ._- -- -.-. ., � , ,.. �� = �- \. ♦ , �,. a W FL W Tc o o s -� � _ _:. _ ! f SEE 24 HOUR SCS CALCULATIONS CONC. O �� <.,.. ,.K _ Y n r RUNOFF TO EXTENDED / _. _ �Ir hrs. err L DETAILS W Tc o _ , ADDITIONAL CHANNEL FLOW , FOR C a _ _ .� ,. , <, a „� � _ EXTENDED DETENTION FACILITY #3 d� , ally_ N A )CITY #2• � J _ 4M` ; = FINAL Tc o.�.6hrs; _ � � .. .:. x,._ SEE SHEET 8 FOR DETAILS - ; 1 NS w LAT O R CS ALCU � » SEE 24 -HOUR 5 C as +lr _ it - jr , S / !► _ \> Q TIUNAL DETAILS _� DETENTION FACILITY #2 -•�` :_, f. ' r : � W / EXTENDED D j _ R DETAILS EE SHEET 8 FO D S ^ - . t, sue+ i NOTE. \ n;, 1. . y r THE THREE EXTENDED . w „ a . , �. Vial 1�_ , _ H", , ! RA _m . r i o -.,. - R Sd ` , %. �D Y VOLUME. FOR EVIDENCE OF THE .� .' x THE WATER QUALITY o ITH 2 � y QUALITY VOLUMES &DETENTION ^ WATER QUALITY WATER Q „�.,, �;, � 'A & General construction notes for Storrnwater Management ement tans , SHEET AND THE FOLLOWING SWM DETAILS g P ,,. COMPLIANCE PLEASE SEE THIS SH �` % of maximum d density CALCULATIONS. 1. All dams and constructed fill to be within - - - / 95 dry Y o material to be approved b !! \ ♦ , and z /o of Optimum moisture content. All fill a o p PP Y \\ \ ,d .� '�'' � \ - ' , BE AT /o COMPACTION SPILLWAYS ARE TO , � F` , LEASE NOTE THE SOIL AROUND THE SP 95 P during otechnical engineer. A eotechrncal engineer is to be resent du i / EMERGENCY SPILLWAYS age g 9 9 P 9 , \\ WITH AN IMPERVIOUS CORE AND CUT OFF TRENCH. THE EMERG / _ of dams. s _ GRAPHIC SCALE ARE TO CONCRETE OR GRASS LINED AND DOWNSTREAM OF THE SPILLWAYS ARE TO construction ��bb r / 11► :, - ED. THE FOREBAY SPILLWAYS SHALL BE CONSTRUCTED OF GABION ants are to be watertight within stormwater _ BE GRASS LINED. 2. Pipe and riser joints g � `�, _. _- , �+a°�>- _ p 1 \ ;,, FL W Tc= o.l hrs. ao so Aso i' szo _ ,- ,_. SHEET O 5 ; so o BASKETS WITH �" STONE STONE ON THE UPHILL SIDE OF THE WEIR. - s mans ement facilities. g \, \\ ♦ .. \ ---_ - _ , _. -» � GONG. FLOW Tc= o.ohrs. n or basins which are to be converted to - - - LACE FOR AS LONG AS 3- For temporary sediment traps ALL EXISTING BIOFILTERS SHALL REMAIN IN P � �y \_ -• � -- e� , - -� CHANNEL "FLOW.Tc = o.ohrs. ADDITIONALLY, A � �-- !t %'�" Went stormwater management facilities conversion is not to take rte\ ''` - FINAL Tc= o.lfshrs: POSSIBLE DURING CONSTRUCTION. perms g ♦ a 0 „r �" / ( IN FEET \_ °s ae rrw erl -- SEE 24 -HQUR SCS CALCULATIONS place until the site is stabilized, and �, _ OR ADDITIONAL DETAILS 1 inch 80 ft. ALL LOW -FLOW ORIFICES ARE DESIGNED FORA 3o HOUR DRAWDOWN TIME FOR n obtained from the Count erosion control ins ector. 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I, I L1T9Lh__._yyi!!!k__ I 0 .L' _�, _ I \ � \ - ____ , I. X __ I I _1.1_____.____________..__ -, ,-,- *> ) " ,,� % ___ I- � Z I F____T__-::::1:=�� — � __ __ � ---- --- _��� - --- , I 1/' / - \ � X \ --.------"-- no, subtotal (D 0 THE IMPERVIOUS AREA. MINIMUM PHOSPHOROUS REMOVAL RATES FOR FACILITIES \ " I � I \ ttb � - -- ---- -_--�-,_, ,� / , _____` __ / __ �, " \ \ lrnpphous ��Taa wthin lGt& 1 30M -C E 1, 2 AND 3 ARE 10%, 25% AND 14% RESPECTFULLY. THE FACILITIES ARE ALSO 1 � '�� -1 __ �� / __ __ _____ .- '__-, -1 \ ,\ / / , " " U Z( ,% ", ____. �-------____- - - " I I \ I I - , 0 C) � - __11__1_1____ i , \__ .11 -1, �. ___ f I I _.� - jo �� "'II "" 11 I-- / I- - ----- t----,,4', :::= --- __ ,-- t_-_ , 7 a) , ___ " � -, i I � -(P "� 'V ,:�, I _�, , , I 11'\ / - _` "_______,_,_,____!__ ____t_____.. I - -t �� _ _±________1 - ----- i _11 0 6 0 _;�'__, '---,, ____,� ____ I \'% / N�/ __1 e., ..rq I - I :, 'III' -, - . ,:.�"%'.41, / / ,* "/, \ / 5 \,�, -- - \ I/ , \ :�-,',.'.�,,W-,'�. � _-) DESIGNED FOR A MINIMUM OF A 3o HOUR DRAWDOWN WITH 2x THE WATER QUALITY / / .... \ � / - - , - , ______T_____ - 7 I) I / �_ , -- , I / 'I/ - ,-, __._ , _______ _._1_ .... I,---- C\1 r_ - `P - ,� �_�' - I , , ______ -,---- , ______1 __1 % , -,,, ` , ,__ -, \ ::,:`r�,-�,:- � \ / "\ �__- - �, I " , � 13NOT __ - . � , \1 ) \ " , / ) / \1 -_ ,\ -- - I / / // 1 _�, -,-� �� ---,-- =-, - _,____i_.___ -----"- -_ - I _____.__1__1 _____,_� 0J VOLUME. FOR EVIDENCE OF THE WATER QUALITY TREATMENT, WATER QUALITY \\., / , , ,,- ,,,, ", '. _ `:a' " �, / "I, \ /I I I ." A _" I I-l" I / /` Agres I � 41 , , - _� I I, " "� , ,� - --�--� --/*--- --_ \ - I I - . , / / �4, ,->-, V -Y ` ___� I., /�_ _,-- // ) I 1-----,..j -----I. 0, To = i Z C: =3 ,VOLUMES & DETENTION COMPLIANCE, PLE - , " -11 0 W C-11 - __ _,�_� `C� , 4. / / " _- � , I �___I)�_0_71��___ ___ _ -----_-----I 4> -0 , ASE SEE THIS SHEET AND THE _General construction no,tes for Stormwater Management plans , , 1.1--` / 4 -,,,, I / I t I 6 i�_e_S,_,___" I Ra- � l i ',\ - I / / .."' ,,,,,,,, / ) I / , / , ,��S!_ no. SUM Area subtotal U _4 � f- 11 />�X�V/ I/ , Iq I / _._111__._1_ . i E - I , 1. I I \ ",I- � i i ____ =__-__��-_---_--------- :3 G) FOLLOWING SWM DETAILS & CALCULATIONS. 1_�i. All dams and constructed fill to be within 95% of maximum dry density I \,) -,.,_ \ ,I, /-0 �,_� / � __1 I 1 Z .---,..-, / / '.1 I_" // i I I i ',L-4--+-- i I __f_______1 UJ (>.?! I - I / I . / ,Z ** - _,"� / II ,_ . I , I I " 11 IIZ , — __ _ _____4 -1.1-1. 0 rn _� ', ', 1"",' \ -11 , -, �, /I -_ __� � I I r---,-- --- 15 .J _0 = and 2% Of Optimum moisture content. All fill material to be approved by '/ / / ' # / i I \ � \ . f F.% , \ ,,-' / / I / r _t=t1____t_1____- * UJI .....--q-, . 4E6 - . I -a PLEASE NOTETHE SOILAROUND THE SPILLWAYSARETO BE AT 9S% COMPACTION / . / ) ,,-- (��, "61, \ / / '�',�Z I - � / --- ZI/ - �6i�;i___________ A.ma__ -_ - -_ _�_ ,____,__i L _0 C: k.,..,. ��p . , / , / _� * I I'll / / / __ �3:§7?j 0.08. 1 32�1_Z11!".17_-__ 59L911 . WITH AN IMPERVIOUS CORE AND CUT-OFF TRENCH. THE EMERGEN / IV "I �-_ " I- \ -'.,, / \ , I ___ i _ _________.___1_ O� UU (D - � I I . :i.3 -,,,-,-. , . 7�� 1 , :,� . / 'I, / - _ - I I d Area I Are-$ (D — Y SPILLWAYS a geotechnical engineer. A geotechnical engineer is to be present during f I , , X / n _11, ____ _J � , -1 � - / / / / "W / "I - ,W-.�,, / 11f I \ - ��iT��I�i -- - ------ - ix 0.26 � i ! _________�x0.25= 3: 3 " .. - I _ .1__1____ . .... __ ....... --.-,.--,, __J__.__._____ r' W .L \ _-, 1____-_-_,__ - , ______________ ___._1 - 0 Q) , ."", / : .. " I I / 'A 11 � \ T I 0 > , ., ,�.: " I \ "'.... I ;" � - 1, �, CL �`�,.,:-� "', z/ z��, � _... 11 /ARE TO CONCRETE OR GRASS LINED AND DOWNSTREAM OF THE SPILLWAYS ARE TO , / 'Ile �, "Ill ,5 I" I / , �Lj� I 1 I construction of dams. 1Z ,/ ) , .�"".-'..; , -71 11 / * / / / 11 i " % - I `__" - , " �� N'. ,W-47�,.� VP ICI ,Other tin peNous Areas I �::�:.;�*.`....-.,,, - � 11 1 , ,.,.,:, �. // / / )G 81C ----I I i 306 NO, U) CD BE GRASS LINED. THE FOREBAY SPILLWA , 1� ,.�, � , , - ., 11" _________ ---- ,-.�--.----.----.--.--.,-.-,-�,,� __._____________ . ..... . _____,_.___.__.. 0) 0 - I � __", __', -- / I - / InVervious Cover � I a on BASKETS WITH Y8" STONE STONE ON THE UPHILL SIDE OF THE WEIR. / r I ...., ,_ ,,, / - _--4��7,� - � Z , / i �_ =:i2ij 102054 - ,-management facilities. / / 11 _�� ��__ - ,,__,�-��_ I SHEET FLOW/Tc= oaSh . ,30 / 320 __,7�__�_ - f(P-1 I(Post). I/ -0 0 . - / / / / / / / _\ �__, , ;:., .141 .......... 3 / / / � // - U I / , _r_ � YS SHALL BE CONSTRUCTED OF GABION 2. Pipe and riserjoints are to be watertight within stormwater / / _... ., �, �� /- / �� -1 ___ .01., I - _� � � \ I--- / / 1_ � __ _,/ / ,�, - / ; , 5-/ // It , //)100/1 / I'' 1 � _____ C '� ,/ '.':�� ..-w- Z= / I ", ,/ i�,�_ _?! 0 i / / 1�' - . � ", J/ �� ....... �, .- . -- tONC. FL, 76W T 0. , r,�. I - —, , - SCALE HALL REMAIN IN PLACE FOR AS LONG AS 3. For temporary sediment traps or basins which are to be converted to / ",, / .1 , , :- - '� - ""... �W_,.,., / / / � ,,, - ADDITIONALLY, ALL EXISTING BICIFILTERS S 1 ,::.%1M.'i I-- . __ . , ?_ - -; .. ----,- / __ 'e. _".7"'. . .._.:�* -%,:�.:,_,. - -1. , - - .4 �_� I =Pl� 100, Y'. - CHANOE C= 0 0 . New Develogirmat (For PnLt�loranent " —r �= 20%) C: (n / / *,,� � 00 � , " / , �LOW , hrs, 'I 11 \ - __ , ?�!�y�T!��!"��11-----,-�-�-----,�-",----�-----. NO. 2 0 -.-'-'I- —,.., .A., _� Tc= o.�fflrs,.' , - — - ___6___L__J___ , '�� -'=_-,!91S e�l_-I:Area _____! � L � . �:. , .L' - - � R t POSSIBLE DURING CONSTRUCTION. permanent stormwater management facilities; conversion is not to take i \ �.,�.-�...-_ -._'1i'_ 1.V-",';1-' I , a i I ,�t 7 \ )_ __ I I FINAL 6 _> 1_ I , i��gp � "P14--�*r!- -- f "' ,��reaType � I1� T 1) / -, I ------r"�---l�l---.--..--�-111.--..,.-j :3 i :;;!�,... , _ -1 - _ 'AL�UL I ?/N S / / ,,--- _____ --- -.,, , J Q> 0 - DOWN TIME FOR " " , � ___ __ YRRV1_!�� _ _ ''� - ., - __ I '.." . i 4��, -1 . fl 16 - �' ,F / , . 3' 1 � 0- / '4W." . . , "/ , �� � ., _P .0 " ., ,� , , =1* 1 L i - � ,�'. '1/ / I Q .� , ,\ ` ,.� , _ / / I � �-�,,,71!W;A - ., _P place until the site is stabilized, and I , i .W.11". -.1 .. .. ..... :_ __,_11 "I ,� /11 .�..::� _,.__ !.____�_ __ ___ _ __ _ � i. ,,/ V1 - " W . , "'.. ; R SEE �4 H I CS -& .� 11___._-_____1_____J �,.;. ___________ ______ ____.____ i - � '�"- ALL LOW-FLOW ORIFICES ARE DESIGNED FOR A 30-HOUR DRAW i I , I I - / / /,f, / 1 , , .____L_____J_.___J . �i ---�..",�.---�.�-,.-,�"---.�---"�.�-11--.,� V) / . I ` 0 > - , ___ _ . � � __ � i L_ \ - -71;1 . I '� / OR'AD � A �TAI / // �xlc h z\ IbU '�,_ _- ___ / * Tinn. values , __ ,I-- r- " .. , 71 L��1,111 IN 111", - .- I ", _ �.. �, , m.. a - " 11 , .. O� . F J _permission has been obtained from the County erosion control inspector. I � r, Or , i!�c E f t� � 7 x .TVO TIMES THE WATER QUALITY VOLUME IN ACCORDANCE WITH. DCR'S VSMH. i 1_� - / I /'/ L I- __�� _Z _A_ -I / i - , _Z____ 1� �,__ I 11 I / I I I I I l- 0 -_ - . . I . I I � � , -,-- I , _ . � - - I I � . 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SEDIMENT BASIN TO REMAIN __1 _____.______ - - - - -_- __ - - - - __ - ----- - ------ ---- __.___,_,__ __________.,_._. - ------ ______.,_,____. �_ ct `_ , I , - _�._ �!: "� , ____� e 1 __6'1'__ �_ / I / W I_ / , \� I I'...- "_ ,� . --,, I - \ I I - I _,1 - Z � . --, I "I, �_�__' - - ) i�; &0 . \1 I I 11 R � - �,/ __ -, '� 11 � -.1--l- 11`Il`l0l1!!!!! i 1� � � - ".."..': ... I � . 11 11 - / IN PLACE AND CONVERTED TO _r_1__ -, \ - - � .'.�:.�:� �__ D.A. #2- I - <� - - \ "', / � I � I .'........., -'.' � , �__ 1, - ',' - ___\ r--"----.fqiA-I-t�-,�.�-.-.,-,"� .... ... . __!;� - ,�... � I � 4 " __j - ," �_� � ETPff�L --.-.�l��"Il'-�-,-..'�-1.1.11---,-,--.-,.-----��-----.-,,---- 0 Ld r_ � �, j I I I - ., .. -<,--%-, - -- - - -\, \ Z) 0 ...... .. , , I /I I HE OUTFALL SYSTEM FOR THE /' UJ 0 / 11_1,�, "I 1 '�� 7- ., ; _J.!�,O CIL. �� - � , -,,��-_,- -7/-L ----- - . Z: " \ / /\ \ I , # , - I 1� --, � -,- - ,--- I -, "-,- - _____ " -_ ' -,- ,I-- -- ---_ _---- _____� PrOjeCt DrWngeArea DeSignation DA# I U) W 5 � I .. .. - - I , , r I -, ,----' - __ ,�� I Z �_ 0 � 11",\1, �_____ - -_ I . . . . . . . . . - _________ Z'_1 11 I , " - * "'I , . __ , /PROPOSED EXTENDED DETENTION � 1/� - -��- - , I ._ _ �� I- _____�� � L stompollutantexport inpounds, L=JPTJ)RW12JIC(A)Z72J \ \ � I i I I \ 17 . __ - . , "� _-"� ,-,-��- "I, �� / FACILITY (TYP.) \ -a � \ .,§.�,'�,� ,4 P.� 1 ', \ \ \ 7 . Tc= o I I t ' \�v - 70 f - - ...... ,-I' ,I-- Li \ \ 1, \'IFL ,-, Z 1_: \ \ \ I �HEET 0 T�= ihr�� - ..."'.... CN= 79-4 . . . . . , ," - I � - .'I- - ____ 0 C: � I )t, - 1 ...'....".."..'.7 - ------- 1__I` , __ I_ '\ R mean runoff coefficient, Rv-0Xr+0,0G9Q) U) '0 - - " \� I �`*.�"-.':'.*. \ \ I I I \ �_V�C. FLOW Tc= \0.01�rs.' - � ..,.�. __� 11� I / II/ / / X " / /11 -_ P! small &toffn correction factor, 0.9 W F4 \ , I � \ � \ I �__ � 1�i DI DlRkTk� \ �, - / -- I /1, ak) \ -. ,; \ \ ' , - W..:.�w Z:�7� NOR TO E ENDEP 6 ---- ___/ \ � \ pereent impeiviousness � W Z \\ \ �'.--'::*-.'."'-I� I I I � \1 \ \CHANNEL FLOWFC=6\04hi�, \ \ �, ___ 1,1. � � ; . I / I/ , i / / - I I ,,- -_ - - _-, P annual preCpltatlon, 43' in Abernale 1?oSt-DovOA#II_ \ � I ... \ �IFX It?, _" - ` .S I "§�'..�,, I " \_1' 11 .-, - i ON AC 1. . .. - I I -A I �-NUI::U UL I tN I IUN f-AUILI I '4r3 - ____ — _ -, F_ a \1 /I " ! \ � � \ k, \FINAL Tr_= oA,6hrs�\ \ , - I I - _1 Z ,�, � ;.-;, - / / //� 1 � A ,Project area In acres in Subject drainne area, ILJ�_=_I_ ., &.441 E7 rr U 6 - ? . \ \ .. \ \ \ \ \ \ \ \ I __ __� I \ larv- " - � - - __._ /_," ,I- I C Polli4aritconcentmtionlmgAori)pmtatgetphosouras - \ 10 �11' ,_�, - - � SEE SHEET 8 FOR DETAILS N -0 i I N_ , -.-- I " , /. / -W /_ If factor appRed to RR U) U I" :�,:.�.":.,:-, , \ \ \ 11 I \ \ , I \SE�,24-14OUR�(-!>�,AL'LU�ATIONS ' \ \ I _.� \ \ � 11 - __ - ,,,- /. / __ ___ Z / , , . � k V required treatment valumelacy, 0.6* Gwimpery area - A(11)4356G(O�V12727 �_ >, C� '. I \ F6"Db1TI6NA'L\D�T,AIP _1 lql�,, \,,,- _ - / ` - __� required.removal, L(post)-fxL(pre) ) 'I I \ � 11 t \ \ \ '�\� \ , � - __� " \ I "U ", ,____ '� , / I � RR J unj � .2 \ - \ 1. "I/ (n � \ - _ .. 'I"", / I %RR removaleficiency, FRIOWL(pos,t) �_ Q> � \ ,,, \ -- i34— t / \ � \ 0 \_1 � \ I \ � \ \ 1, � I . / rs I 1Z \'\I � � - 0 .1 \ ,-10 I,- / __11� Pff�12m!�sp!!S!,Il�me��!"Iy,l!��e�,ii.��R�L&,�!�---,-..-. - ------- -..-,�---.,��-�-,--.----,�-�--,,.,.--,...�,-.�--.. �_ 0 F3 , I ,,, I \ TI T 2 , ,,�. I/ !T " - , __1 -1 , � \ , Z // -.-�----�---.-------,-,�--------- -------------��..-,--,-,�,��.,--.,.""..! rn ) ) �, / � \ \ \ \ I , \ , .\ \, ,,, \ �!\ '� , , _,� __�.� 'Ir ____ - I Z , \ �\ � i W I I / \ \ \ 11 - - �_ \ \ \ \ \ , \ \ I \ � � �, \ 360 ---I '1< " --,,, - 11�, -_ -�_ , �1, \ \ \ __4 I" - I _-_ I ,Area mej 0) \ , I - / - I C I'll -, - / / , k , \ � I \ \ \ \ \ ,,� , � �, , , _-, ____ I \ � \ \ �, _ ---. ",� 11 / " \ \ \ .1 ------!it--,--.—.-�,.-..--.-.---,�.--- - _,_ ___.- _,____.__ I M > 0 / \ � � N '�_ I /_11,__ .---- "I", __ - 1, .1., \ I / :: I __ - __ ,�_, PY � I A- #1 i±Tqi�_MLI�!!_ sz��, I __ ,D.A- #1 Mngth_ Width subtetal U.J .�i (I / - " 11 / ,,--"/ , i I 11 � ____ I I , - "I - _ -_ ,- 1XI Z �-1-4,__ i --- � _____ __.______1__.__?22� cc: � / I I - , I \ I , , \ , __ 1 I - 1� .7, # � X I - 11� , ____ - --- _ le I /1), ( � \ \ \ �k \ \ \ \ ". \ \ _..____._ / 1Z I _1 7..."'A / I "" _., �, \ ! \ ,/ , , \ .1 _ - � 11 __ - I ,: '� \ - Z - - - ...,.,. ______ \ \ -2 0 NOTE: \ , 1-11 - ___ . -_ ,/ ___ .-,-I- 1'%, J . -'W,; / �II, --,-,\ I \ \ , [�_' I —J 0 I __,___ - I' / " —, - --- I I - � � \11 _.- " , � :,.:�:% � J //, / - III- " , 11, - ___I / , , , ± � MOO X JHE THREE EXTENDED DETENTION BASINS SHALL BE DESIGNED TO TREAT 3S% OF I' I"'I 11 _� � ,--A "' .. r. .1 I' �___ , __ — - I t_,__i___ 7,975 Q) -0 --- . --I __� ____� -- - \ \ N \ I-- ___� __ _____11__,1_1 -"--- — _, I--,' X _ \ I , �; �_ \ \\ __=__�:_1_J____1 - ! __±__�� i < Q , � - 'I- �_,,� 11 ; - _ - /I 'I I- - ;9 , 1. I, I L1T9Lh__._yyi!!!k__ I 0 .L' _�, _ I \ � \ - ____ , I. X __ I I _1.1_____.____________..__ -, ,-,- *> ) " ,,� % ___ I- � Z I F____T__-::::1:=�� — � __ __ � ---- --- _��� - --- , I 1/' / - \ � X \ --.------"-- no, subtotal (D 0 THE IMPERVIOUS AREA. MINIMUM PHOSPHOROUS REMOVAL RATES FOR FACILITIES \ " I � I \ ttb � - -- ---- -_--�-,_, ,� / , _____` __ / __ �, " \ \ lrnpphous ��Taa wthin lGt& 1 30M -C E 1, 2 AND 3 ARE 10%, 25% AND 14% RESPECTFULLY. THE FACILITIES ARE ALSO 1 � '�� -1 __ �� / __ __ _____ .- '__-, -1 \ ,\ / / , " " U Z( ,% ", ____. �-------____- - - " I I \ I I - , 0 C) � - __11__1_1____ i , \__ .11 -1, �. ___ f I I _.� - jo �� "'II "" 11 I-- / I- - ----- t----,,4', :::= --- __ ,-- t_-_ , 7 a) , ___ " � -, i I � -(P "� 'V ,:�, I _�, , , I 11'\ / - _` "_______,_,_,____!__ ____t_____.. I - -t �� _ _±________1 - ----- i _11 0 6 0 _;�'__, '---,, ____,� ____ I \'% / N�/ __1 e., ..rq I - I :, 'III' -, - . ,:.�"%'.41, / / ,* "/, \ / 5 \,�, -- - \ I/ , \ :�-,',.'.�,,W-,'�. � _-) DESIGNED FOR A MINIMUM OF A 3o HOUR DRAWDOWN WITH 2x THE WATER QUALITY / / .... \ � / - - , - , ______T_____ - 7 I) I / �_ , -- , I / 'I/ - ,-, __._ , _______ _._1_ .... I,---- C\1 r_ - `P - ,� �_�' - I , , ______ -,---- , ______1 __1 % , -,,, ` , ,__ -, \ ::,:`r�,-�,:- � \ / "\ �__- - �, I " , � 13NOT __ - . � , \1 ) \ " , / ) / \1 -_ ,\ -- - I / / // 1 _�, -,-� �� ---,-- =-, - _,____i_.___ -----"- -_ - I _____.__1__1 _____,_� 0J VOLUME. FOR EVIDENCE OF THE WATER QUALITY TREATMENT, WATER QUALITY \\., / , , ,,- ,,,, ", '. _ `:a' " �, / "I, \ /I I I ." A _" I I-l" I / /` Agres I � 41 , , - _� I I, " "� , ,� - --�--� --/*--- --_ \ - I I - . , / / �4, ,->-, V -Y ` ___� I., /�_ _,-- // ) I 1-----,..j -----I. 0, To = i Z C: =3 ,VOLUMES & DETENTION COMPLIANCE, PLE - , " -11 0 W C-11 - __ _,�_� `C� , 4. / / " _- � , I �___I)�_0_71��___ ___ _ -----_-----I 4> -0 , ASE SEE THIS SHEET AND THE _General construction no,tes for Stormwater Management plans , , 1.1--` / 4 -,,,, I / I t I 6 i�_e_S,_,___" I Ra- � l i ',\ - I / / .."' ,,,,,,,, / ) I / , / , ,��S!_ no. SUM Area subtotal U _4 � f- 11 />�X�V/ I/ , Iq I / _._111__._1_ . i E - I , 1. I I \ ",I- � i i ____ =__-__��-_---_--------- :3 G) FOLLOWING SWM DETAILS & CALCULATIONS. 1_�i. All dams and constructed fill to be within 95% of maximum dry density I \,) -,.,_ \ ,I, /-0 �,_� / � __1 I 1 Z .---,..-, / / '.1 I_" // i I I i ',L-4--+-- i I __f_______1 UJ (>.?! I - I / I . / ,Z ** - _,"� / II ,_ . I , I I " 11 IIZ , — __ _ _____4 -1.1-1. 0 rn _� ', ', 1"",' \ -11 , -, �, /I -_ __� � I I r---,-- --- 15 .J _0 = and 2% Of Optimum moisture content. All fill material to be approved by '/ / / ' # / i I \ � \ . f F.% , \ ,,-' / / I / r _t=t1____t_1____- * UJI .....--q-, . 4E6 - . I -a PLEASE NOTETHE SOILAROUND THE SPILLWAYSARETO BE AT 9S% COMPACTION / . / ) ,,-- (��, "61, \ / / '�',�Z I - � / --- ZI/ - �6i�;i___________ A.ma__ -_ - -_ _�_ ,____,__i L _0 C: k.,..,. ��p . , / , / _� * I I'll / / / __ �3:§7?j 0.08. 1 32�1_Z11!".17_-__ 59L911 . WITH AN IMPERVIOUS CORE AND CUT-OFF TRENCH. THE EMERGEN / IV "I �-_ " I- \ -'.,, / \ , I ___ i _ _________.___1_ O� UU (D - � I I . :i.3 -,,,-,-. , . 7�� 1 , :,� . / 'I, / - _ - I I d Area I Are-$ (D — Y SPILLWAYS a geotechnical engineer. A geotechnical engineer is to be present during f I , , X / n _11, ____ _J � , -1 � - / / / / "W / "I - ,W-.�,, / 11f I \ - ��iT��I�i -- - ------ - ix 0.26 � i ! _________�x0.25= 3: 3 " .. - I _ .1__1____ . .... __ ....... --.-,.--,, __J__.__._____ r' W .L \ _-, 1____-_-_,__ - , ______________ ___._1 - 0 Q) , ."", / : .. " I I / 'A 11 � \ T I 0 > , ., ,�.: " I \ "'.... I ;" � - 1, �, CL �`�,.,:-� "', z/ z��, � _... 11 /ARE TO CONCRETE OR GRASS LINED AND DOWNSTREAM OF THE SPILLWAYS ARE TO , / 'Ile �, "Ill ,5 I" I / , �Lj� I 1 I construction of dams. 1Z ,/ ) , .�"".-'..; , -71 11 / * / / / 11 i " % - I `__" - , " �� N'. ,W-47�,.� VP ICI ,Other tin peNous Areas I �::�:.;�*.`....-.,,, - � 11 1 , ,.,.,:, �. // / / )G 81C ----I I i 306 NO, U) CD BE GRASS LINED. THE FOREBAY SPILLWA , 1� ,.�, � , , - ., 11" _________ ---- ,-.�--.----.----.--.--.,-.-,-�,,� __._____________ . ..... . _____,_.___.__.. 0) 0 - I � __", __', -- / I - / InVervious Cover � I a on BASKETS WITH Y8" STONE STONE ON THE UPHILL SIDE OF THE WEIR. / r I ...., ,_ ,,, / - _--4��7,� - � Z , / i �_ =:i2ij 102054 - ,-management facilities. / / 11 _�� ��__ - ,,__,�-��_ I SHEET FLOW/Tc= oaSh . ,30 / 320 __,7�__�_ - f(P-1 I(Post). I/ -0 0 . - / / / / / / / _\ �__, , ;:., .141 .......... 3 / / / � // - U I / , _r_ � YS SHALL BE CONSTRUCTED OF GABION 2. Pipe and riserjoints are to be watertight within stormwater / / _... ., �, �� /- / �� -1 ___ .01., I - _� � � \ I--- / / 1_ � __ _,/ / ,�, - / ; , 5-/ // It , //)100/1 / I'' 1 � _____ C '� ,/ '.':�� ..-w- Z= / I ", ,/ i�,�_ _?! 0 i / / 1�' - . � ", J/ �� ....... �, .- . -- tONC. FL, 76W T 0. , r,�. I - —, , - SCALE HALL REMAIN IN PLACE FOR AS LONG AS 3. For temporary sediment traps or basins which are to be converted to / ",, / .1 , , :- - '� - ""... �W_,.,., / / / � ,,, - ADDITIONALLY, ALL EXISTING BICIFILTERS S 1 ,::.%1M.'i I-- . __ . , ?_ - -; .. ----,- / __ 'e. _".7"'. . .._.:�* -%,:�.:,_,. - -1. , - - .4 �_� I =Pl� 100, Y'. - CHANOE C= 0 0 . New Develogirmat (For PnLt�loranent " —r �= 20%) C: (n / / *,,� � 00 � , " / , �LOW , hrs, 'I 11 \ - __ , ?�!�y�T!��!"��11-----,-�-�-----,�-",----�-----. NO. 2 0 -.-'-'I- —,.., .A., _� Tc= o.�fflrs,.' , - — - ___6___L__J___ , '�� -'=_-,!91S e�l_-I:Area _____! � L � . �:. , .L' - - � R t POSSIBLE DURING CONSTRUCTION. permanent stormwater management facilities; conversion is not to take i \ �.,�.-�...-_ -._'1i'_ 1.V-",';1-' I , a i I ,�t 7 \ )_ __ I I FINAL 6 _> 1_ I , i��gp � "P14--�*r!- -- f "' ,��reaType � I1� T 1) / -, I ------r"�---l�l---.--..--�-111.--..,.-j :3 i :;;!�,... , _ -1 - _ 'AL�UL I ?/N S / / ,,--- _____ --- -.,, , J Q> 0 - DOWN TIME FOR " " , � ___ __ YRRV1_!�� _ _ ''� - ., - __ I '.." . i 4��, -1 . fl 16 - �' ,F / , . 3' 1 � 0- / '4W." . . , "/ , �� � ., _P .0 " ., ,� , , =1* 1 L i - � ,�'. '1/ / I Q .� , ,\ ` ,.� , _ / / I � �-�,,,71!W;A - ., _P place until the site is stabilized, and I , i .W.11". -.1 .. .. ..... :_ __,_11 "I ,� /11 .�..::� _,.__ !.____�_ __ ___ _ __ _ � i. ,,/ V1 - " W . , "'.. ; R SEE �4 H I CS -& .� 11___._-_____1_____J �,.;. ___________ ______ ____.____ i - � '�"- ALL LOW-FLOW ORIFICES ARE DESIGNED FOR A 30-HOUR DRAW i I , I I - / / /,f, / 1 , , .____L_____J_.___J . �i ---�..",�.---�.�-,.-,�"---.�---"�.�-11--.,� V) / . I ` 0 > - , ___ _ . � � __ � i L_ \ - -71;1 . I '� / OR'AD � A �TAI / // �xlc h z\ IbU '�,_ _- ___ / * Tinn. values , __ ,I-- r- " .. , 71 L��1,111 IN 111", - .- I ", _ �.. �, , m.. a - " 11 , .. O� . F J _permission has been obtained from the County erosion control inspector. I � r, Or , i!�c E f t� � 7 x .TVO TIMES THE WATER QUALITY VOLUME IN ACCORDANCE WITH. DCR'S VSMH. i 1_� - / I /'/ L I- __�� _Z _A_ -I / i - , _Z____ 1� �,__ I 11 I / I I I I I l- 0 -_ - . . I . I I � � , -,-- I , _ . � - - I I � . 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Z: " \ / /\ \ I , # , - I 1� --, � -,- - ,--- I -, "-,- - _____ " -_ ' -,- ,I-- -- ---_ _---- _____� PrOjeCt DrWngeArea DeSignation DA# I U) W 5 � I .. .. - - I , , r I -, ,----' - __ ,�� I Z �_ 0 � 11",\1, �_____ - -_ I . . . . . . . . . - _________ Z'_1 11 I , " - * "'I , . __ , /PROPOSED EXTENDED DETENTION � 1/� - -��- - , I ._ _ �� I- _____�� � L stompollutantexport inpounds, L=JPTJ)RW12JIC(A)Z72J \ \ � I i I I \ 17 . __ - . , "� _-"� ,-,-��- "I, �� / FACILITY (TYP.) \ -a � \ .,§.�,'�,� ,4 P.� 1 ', \ \ \ 7 . Tc= o I I t ' \�v - 70 f - - ...... ,-I' ,I-- Li \ \ 1, \'IFL ,-, Z 1_: \ \ \ I �HEET 0 T�= ihr�� - ..."'.... CN= 79-4 . . . . . , ," - I � - .'I- - ____ 0 C: � I )t, - 1 ...'....".."..'.7 - ------- 1__I` , __ I_ '\ R mean runoff coefficient, Rv-0Xr+0,0G9Q) U) '0 - - " \� I �`*.�"-.':'.*. \ \ I I I \ �_V�C. FLOW Tc= \0.01�rs.' - � ..,.�. __� 11� I / II/ / / X " / /11 -_ P! small &toffn correction factor, 0.9 W F4 \ , I � \ � \ I �__ � 1�i DI DlRkTk� \ �, - / -- I /1, ak) \ -. ,; \ \ ' , - W..:.�w Z:�7� NOR TO E ENDEP 6 ---- ___/ \ � \ pereent impeiviousness � W Z \\ \ �'.--'::*-.'."'-I� I I I � \1 \ \CHANNEL FLOWFC=6\04hi�, \ \ �, ___ 1,1. � � ; . I / I/ , i / / - I I ,,- -_ - - _-, P annual preCpltatlon, 43' in Abernale 1?oSt-DovOA#II_ \ � I ... \ �IFX It?, _" - ` .S I "§�'..�,, I " \_1' 11 .-, - i ON AC 1. . .. - I I -A I �-NUI::U UL I tN I IUN f-AUILI I '4r3 - ____ — _ -, F_ a \1 /I " ! \ � � \ k, \FINAL Tr_= oA,6hrs�\ \ , - I I - _1 Z ,�, � ;.-;, - / / //� 1 � A ,Project area In acres in Subject drainne area, ILJ�_=_I_ ., &.441 E7 rr U 6 - ? . \ \ .. \ \ \ \ \ \ \ \ I __ __� I \ larv- " - � - - __._ /_," ,I- I C Polli4aritconcentmtionlmgAori)pmtatgetphosouras - \ 10 �11' ,_�, - - � SEE SHEET 8 FOR DETAILS N -0 i I N_ , -.-- I " , /. / -W /_ If factor appRed to RR U) U I" :�,:.�.":.,:-, , \ \ \ 11 I \ \ , I \SE�,24-14OUR�(-!>�,AL'LU�ATIONS ' \ \ I _.� \ \ � 11 - __ - ,,,- /. / __ ___ Z / , , . � k V required treatment valumelacy, 0.6* Gwimpery area - A(11)4356G(O�V12727 �_ >, C� '. I \ F6"Db1TI6NA'L\D�T,AIP _1 lql�,, \,,,- _ - / ` - __� required.removal, L(post)-fxL(pre) ) 'I I \ � 11 t \ \ \ '�\� \ , � - __� " \ I "U ", ,____ '� , / I � RR J unj � .2 \ - \ 1. "I/ (n � \ - _ .. 'I"", / I %RR removaleficiency, FRIOWL(pos,t) �_ Q> � \ ,,, \ -- i34— t / \ � \ 0 \_1 � \ I \ � \ \ 1, � I . / rs I 1Z \'\I � � - 0 .1 \ ,-10 I,- / __11� Pff�12m!�sp!!S!,Il�me��!"Iy,l!��e�,ii.��R�L&,�!�---,-..-. - ------- -..-,�---.,��-�-,--.----,�-�--,,.,.--,...�,-.�--.. �_ 0 F3 , I ,,, I \ TI T 2 , ,,�. I/ !T " - , __1 -1 , � \ , Z // -.-�----�---.-------,-,�--------- -------------��..-,--,-,�,��.,--.,.""..! rn ) ) �, / � \ \ \ \ I , \ , .\ \, ,,, \ �!\ '� , , _,� __�.� 'Ir ____ - I Z , \ �\ � i W I I / \ \ \ 11 - - �_ \ \ \ \ \ , \ \ I \ � � �, \ 360 ---I '1< " --,,, - 11�, -_ -�_ , �1, \ \ \ __4 I" - I _-_ I ,Area mej 0) \ , I - / - I C I'll -, - / / , k , \ � I \ \ \ \ \ ,,� , � �, , , _-, ____ I \ � \ \ �, _ ---. ",� 11 / " \ \ \ .1 ------!it--,--.—.-�,.-..--.-.---,�.--- - _,_ ___.- _,____.__ I M > 0 / \ � � N '�_ I /_11,__ .---- "I", __ - 1, .1., \ I / :: I __ - __ ,�_, PY � I A- #1 i±Tqi�_MLI�!!_ sz��, I __ ,D.A- #1 Mngth_ Width subtetal U.J .�i (I / - " 11 / ,,--"/ , i I 11 � ____ I I , - "I - _ -_ ,- 1XI Z �-1-4,__ i --- � _____ __.______1__.__?22� cc: � / I I - , I \ I , , \ , __ 1 I - 1� .7, # � X I - 11� , ____ - --- _ le I /1), ( � \ \ \ �k \ \ \ \ ". \ \ _..____._ / 1Z I _1 7..."'A / I "" _., �, \ ! \ ,/ , , \ .1 _ - � 11 __ - I ,: '� \ - Z - - - ...,.,. ______ \ \ -2 0 NOTE: \ , 1-11 - ___ . -_ ,/ ___ .-,-I- 1'%, J . -'W,; / �II, --,-,\ I \ \ , [�_' I —J 0 I __,___ - I' / " —, - --- I I - � � \11 _.- " , � :,.:�:% � J //, / - III- " , 11, - ___I / , , , ± � MOO X JHE THREE EXTENDED DETENTION BASINS SHALL BE DESIGNED TO TREAT 3S% OF I' I"'I 11 _� � ,--A "' .. r. .1 I' �___ , __ — - I t_,__i___ 7,975 Q) -0 --- . --I __� ____� -- - \ \ N \ I-- ___� __ _____11__,1_1 -"--- — _, I--,' X _ \ I , �; �_ \ \\ __=__�:_1_J____1 - ! __±__�� i < Q , � - 'I- �_,,� 11 ; - _ - /I 'I I- - ;9 , 1. I, I L1T9Lh__._yyi!!!k__ I 0 .L' _�, _ I \ � \ - ____ , I. X __ I I _1.1_____.____________..__ -, ,-,- *> ) " ,,� % ___ I- � Z I F____T__-::::1:=�� — � __ __ � ---- --- _��� - --- , I 1/' / - \ � X \ --.------"-- no, subtotal (D 0 THE IMPERVIOUS AREA. MINIMUM PHOSPHOROUS REMOVAL RATES FOR FACILITIES \ " I � I \ ttb � - -- ---- -_--�-,_, ,� / , _____` __ / __ �, " \ \ lrnpphous ��Taa wthin lGt& 1 30M -C E 1, 2 AND 3 ARE 10%, 25% AND 14% RESPECTFULLY. THE FACILITIES ARE ALSO 1 � '�� -1 __ �� / __ __ _____ .- '__-, -1 \ ,\ / / , " " U Z( ,% ", ____. �-------____- - - " I I \ I I - , 0 C) � - __11__1_1____ i , \__ .11 -1, �. ___ f I I _.� - jo �� "'II "" 11 I-- / I- - ----- t----,,4', :::= --- __ ,-- t_-_ , 7 a) , ___ " � -, i I � -(P "� 'V ,:�, I _�, , , I 11'\ / - _` "_______,_,_,____!__ ____t_____.. I - -t �� _ _±________1 - ----- i _11 0 6 0 _;�'__, '---,, ____,� ____ I \'% / N�/ __1 e., ..rq I - I :, 'III' -, - . ,:.�"%'.41, / / ,* "/, \ / 5 \,�, -- - \ I/ , \ :�-,',.'.�,,W-,'�. � _-) DESIGNED FOR A MINIMUM OF A 3o HOUR DRAWDOWN WITH 2x THE WATER QUALITY / / .... \ � / - - , - , ______T_____ - 7 I) I / �_ , -- , I / 'I/ - ,-, __._ , _______ _._1_ .... I,---- C\1 r_ - `P - ,� �_�' - I , , ______ -,---- , ______1 __1 % , -,,, ` , ,__ -, \ ::,:`r�,-�,:- � \ / "\ �__- - �, I " , � 13NOT __ - . � , \1 ) \ " , / ) / \1 -_ ,\ -- - I / / // 1 _�, -,-� �� ---,-- =-, - _,____i_.___ -----"- -_ - I _____.__1__1 _____,_� 0J VOLUME. FOR EVIDENCE OF THE WATER QUALITY TREATMENT, WATER QUALITY \\., / , , ,,- ,,,, ", '. _ `:a' " �, / "I, \ /I I I ." A _" I I-l" I / /` Agres I � 41 , , - _� I I, " "� , ,� - --�--� --/*--- --_ \ - I I - . , / / �4, ,->-, V -Y ` ___� I., /�_ _,-- // ) I 1-----,..j -----I. 0, To = i Z C: =3 ,VOLUMES & DETENTION COMPLIANCE, PLE - , " -11 0 W C-11 - __ _,�_� `C� , 4. / / " _- � , I �___I)�_0_71��___ ___ _ -----_-----I 4> -0 , ASE SEE THIS SHEET AND THE _General construction no,tes for Stormwater Management plans , , 1.1--` / 4 -,,,, I / I t I 6 i�_e_S,_,___" I Ra- � l i ',\ - I / / .."' ,,,,,,,, / ) I / , / , ,��S!_ no. SUM Area subtotal U _4 � f- 11 />�X�V/ I/ , Iq I / _._111__._1_ . i E - I , 1. I I \ ",I- � i i ____ =__-__��-_---_--------- :3 G) FOLLOWING SWM DETAILS & CALCULATIONS. 1_�i. All dams and constructed fill to be within 95% of maximum dry density I \,) -,.,_ \ ,I, /-0 �,_� / � __1 I 1 Z .---,..-, / / '.1 I_" // i I I i ',L-4--+-- i I __f_______1 UJ (>.?! I - I / I . / ,Z ** - _,"� / II ,_ . I , I I " 11 IIZ , — __ _ _____4 -1.1-1. 0 rn _� ', ', 1"",' \ -11 , -, �, /I -_ __� � I I r---,-- --- 15 .J _0 = and 2% Of Optimum moisture content. All fill material to be approved by '/ / / ' # / i I \ � \ . f F.% , \ ,,-' / / I / r _t=t1____t_1____- * UJI .....--q-, . 4E6 - . I -a PLEASE NOTETHE SOILAROUND THE SPILLWAYSARETO BE AT 9S% COMPACTION / . / ) ,,-- (��, "61, \ / / '�',�Z I - � / --- ZI/ - �6i�;i___________ A.ma__ -_ - -_ _�_ ,____,__i L _0 C: k.,..,. ��p . , / , / _� * I I'll / / / __ �3:§7?j 0.08. 1 32�1_Z11!".17_-__ 59L911 . WITH AN IMPERVIOUS CORE AND CUT-OFF TRENCH. THE EMERGEN / IV "I �-_ " I- \ -'.,, / \ , I ___ i _ _________.___1_ O� UU (D - � I I . :i.3 -,,,-,-. , . 7�� 1 , :,� . / 'I, / - _ - I I d Area I Are-$ (D — Y SPILLWAYS a geotechnical engineer. A geotechnical engineer is to be present during f I , , X / n _11, ____ _J � , -1 � - / / / / "W / "I - ,W-.�,, / 11f I \ - ��iT��I�i -- - ------ - ix 0.26 � i ! _________�x0.25= 3: 3 " .. - I _ .1__1____ . .... __ ....... --.-,.--,, __J__.__._____ r' W .L \ _-, 1____-_-_,__ - , ______________ ___._1 - 0 Q) , ."", / : .. " I I / 'A 11 � \ T I 0 > , ., ,�.: " I \ "'.... I ;" � - 1, �, CL �`�,.,:-� "', z/ z��, � _... 11 /ARE TO CONCRETE OR GRASS LINED AND DOWNSTREAM OF THE SPILLWAYS ARE TO , / 'Ile �, "Ill ,5 I" I / , �Lj� I 1 I construction of dams. 1Z ,/ ) , .�"".-'..; , -71 11 / * / / / 11 i " % - I `__" - , " �� N'. ,W-47�,.� VP ICI ,Other tin peNous Areas I �::�:.;�*.`....-.,,, - � 11 1 , ,.,.,:, �. // / / )G 81C ----I I i 306 NO, U) CD BE GRASS LINED. THE FOREBAY SPILLWA , 1� ,.�, � , , - ., 11" _________ ---- ,-.�--.----.----.--.--.,-.-,-�,,� __._____________ . ..... . _____,_.___.__.. 0) 0 - I � __", __', -- / I - / InVervious Cover � I a on BASKETS WITH Y8" STONE STONE ON THE UPHILL SIDE OF THE WEIR. / r I ...., ,_ ,,, / - _--4��7,� - � Z , / i �_ =:i2ij 102054 - ,-management facilities. / / 11 _�� ��__ - ,,__,�-��_ I SHEET FLOW/Tc= oaSh . ,30 / 320 __,7�__�_ - f(P-1 I(Post). I/ -0 0 . - / / / / / / / _\ �__, , ;:., .141 .......... 3 / / / � // - U I / , _r_ � YS SHALL BE CONSTRUCTED OF GABION 2. Pipe and riserjoints are to be watertight within stormwater / / _... ., �, �� /- / �� -1 ___ .01., I - _� � � \ I--- / / 1_ � __ _,/ / ,�, - / ; , 5-/ // It , //)100/1 / I'' 1 � _____ C '� ,/ '.':�� ..-w- Z= / I ", ,/ i�,�_ _?! 0 i / / 1�' - . � ", J/ �� ....... �, .- . -- tONC. FL, 76W T 0. , r,�. I - —, , - SCALE HALL REMAIN IN PLACE FOR AS LONG AS 3. For temporary sediment traps or basins which are to be converted to / ",, / .1 , , :- - '� - ""... �W_,.,., / / / � ,,, - ADDITIONALLY, ALL EXISTING BICIFILTERS S 1 ,::.%1M.'i I-- . __ . , ?_ - -; .. ----,- / __ 'e. _".7"'. . .._.:�* -%,:�.:,_,. - -1. , - - .4 �_� I =Pl� 100, Y'. - CHANOE C= 0 0 . New Develogirmat (For PnLt�loranent " —r �= 20%) C: (n / / *,,� � 00 � , " / , �LOW , hrs, 'I 11 \ - __ , ?�!�y�T!��!"��11-----,-�-�-----,�-",----�-----. NO. 2 0 -.-'-'I- —,.., .A., _� Tc= o.�fflrs,.' , - — - ___6___L__J___ , '�� -'=_-,!91S e�l_-I:Area _____! � L � . �:. , .L' - - � R t POSSIBLE DURING CONSTRUCTION. permanent stormwater management facilities; conversion is not to take i \ �.,�.-�...-_ -._'1i'_ 1.V-",';1-' I , a i I ,�t 7 \ )_ __ I I FINAL 6 _> 1_ I , i��gp � "P14--�*r!- -- f "' ,��reaType � I1� T 1) / -, I ------r"�---l�l---.--..--�-111.--..,.-j :3 i :;;!�,... , _ -1 - _ 'AL�UL I ?/N S / / ,,--- _____ --- -.,, , J Q> 0 - DOWN TIME FOR " " , � ___ __ YRRV1_!�� _ _ ''� - ., - __ I '.." . i 4��, -1 . fl 16 - �' ,F / , . 3' 1 � 0- / '4W." . . , "/ , �� � ., _P .0 " ., ,� , , =1* 1 L i - � ,�'. '1/ / I Q .� , ,\ ` ,.� , _ / / I � �-�,,,71!W;A - ., _P place until the site is stabilized, and I , i .W.11". -.1 .. .. ..... :_ __,_11 "I ,� /11 .�..::� _,.__ !.____�_ __ ___ _ __ _ � i. ,,/ V1 - " W . , "'.. ; R SEE �4 H I CS -& .� 11___._-_____1_____J �,.;. ___________ ______ ____.____ i - � '�"- ALL LOW-FLOW ORIFICES ARE DESIGNED FOR A 30-HOUR DRAW i I , I I - / / /,f, / 1 , , .____L_____J_.___J . �i ---�..",�.---�.�-,.-,�"---.�---"�.�-11--.,� V) / . I ` 0 > - , ___ _ . � � __ � i L_ \ - -71;1 . I '� / OR'AD � A �TAI / // �xlc h z\ IbU '�,_ _- ___ / * Tinn. values , __ ,I-- r- " .. , 71 L��1,111 IN 111", - .- I ", _ �.. �, , m.. a - " 11 , .. O� . F J _permission has been obtained from the County erosion control inspector. I � r, Or , i!�c E f t� � 7 x .TVO TIMES THE WATER QUALITY VOLUME IN ACCORDANCE WITH. DCR'S VSMH. i 1_� - / I /'/ L I- __�� _Z _A_ -I / i - , _Z____ 1� �,__ I 11 I / I I I I I l- 0 -_ - . . I . I I � � , -,-- I , _ . � - - I I � . 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I / I/ , i / / - I I ,,- -_ - - _-, P annual preCpltatlon, 43' in Abernale 1?oSt-DovOA#II_ \ � I ... \ �IFX It?, _" - ` .S I "§�'..�,, I " \_1' 11 .-, - i ON AC 1. . .. - I I -A I �-NUI::U UL I tN I IUN f-AUILI I '4r3 - ____ — _ -, F_ a \1 /I " ! \ � � \ k, \FINAL Tr_= oA,6hrs�\ \ , - I I - _1 Z ,�, � ;.-;, - / / //� 1 � A ,Project area In acres in Subject drainne area, ILJ�_=_I_ ., &.441 E7 rr U 6 - ? . \ \ .. \ \ \ \ \ \ \ \ I __ __� I \ larv- " - � - - __._ /_," ,I- I C Polli4aritconcentmtionlmgAori)pmtatgetphosouras - \ 10 �11' ,_�, - - � SEE SHEET 8 FOR DETAILS N -0 i I N_ , -.-- I " , /. / -W /_ If factor appRed to RR U) U I" :�,:.�.":.,:-, , \ \ \ 11 I \ \ , I \SE�,24-14OUR�(-!>�,AL'LU�ATIONS ' \ \ I _.� \ \ � 11 - __ - ,,,- /. / __ ___ Z / , , . � k V required treatment valumelacy, 0.6* Gwimpery area - A(11)4356G(O�V12727 �_ >, C� '. I \ F6"Db1TI6NA'L\D�T,AIP _1 lql�,, \,,,- _ - / ` - __� required.removal, L(post)-fxL(pre) ) 'I I \ � 11 t \ \ \ '�\� \ , � - __� " \ I "U ", ,____ '� , / I � RR J unj � .2 \ - \ 1. "I/ (n � \ - _ .. 'I"", / I %RR removaleficiency, FRIOWL(pos,t) �_ Q> � \ ,,, \ -- i34— t / \ � \ 0 \_1 � \ I \ � \ \ 1, � I . / rs I 1Z \'\I � � - 0 .1 \ ,-10 I,- / __11� Pff�12m!�sp!!S!,Il�me��!"Iy,l!��e�,ii.��R�L&,�!�---,-..-. - ------- -..-,�---.,��-�-,--.----,�-�--,,.,.--,...�,-.�--.. �_ 0 F3 , I ,,, I \ TI T 2 , ,,�. I/ !T " - , __1 -1 , � \ , Z // -.-�----�---.-------,-,�--------- -------------��..-,--,-,�,��.,--.,.""..! rn ) ) �, / � \ \ \ \ I , \ , .\ \, ,,, \ �!\ '� , , _,� __�.� 'Ir ____ - I Z , \ �\ � i W I I / \ \ \ 11 - - �_ \ \ \ \ \ , \ \ I \ � � �, \ 360 ---I '1< " --,,, - 11�, -_ -�_ , �1, \ \ \ __4 I" - I _-_ I ,Area mej 0) \ , I - / - I C I'll -, - / / , k , \ � I \ \ \ \ \ ,,� , � �, , , _-, ____ I \ � \ \ �, _ ---. ",� 11 / " \ \ \ .1 ------!it--,--.—.-�,.-..--.-.---,�.--- - _,_ ___.- _,____.__ I M > 0 / \ � � N '�_ I /_11,__ .---- "I", __ - 1, .1., \ I / :: I __ - __ ,�_, PY � I A- #1 i±Tqi�_MLI�!!_ sz��, I __ ,D.A- #1 Mngth_ Width subtetal U.J .�i (I / - " 11 / ,,--"/ , i I 11 � ____ I I , - "I - _ -_ ,- 1XI Z �-1-4,__ i --- � _____ __.______1__.__?22� cc: � / I I - , I \ I , , \ , __ 1 I - 1� .7, # � X I - 11� , ____ - --- _ le I /1), ( � \ \ \ �k \ \ \ \ ". \ \ _..____._ / 1Z I _1 7..."'A / I "" _., �, \ ! \ ,/ , , \ .1 _ - � 11 __ - I ,: '� \ - Z - - - ...,.,. ______ \ \ -2 0 NOTE: \ , 1-11 - ___ . -_ ,/ ___ .-,-I- 1'%, J . -'W,; / �II, --,-,\ I \ \ , [�_' I —J 0 I __,___ - I' / " —, - --- I I - � � \11 _.- " , � :,.:�:% � J //, / - III- " , 11, - ___I / , , , ± � MOO X JHE THREE EXTENDED DETENTION BASINS SHALL BE DESIGNED TO TREAT 3S% OF I' I"'I 11 _� � ,--A "' .. r. .1 I' �___ , __ — - I t_,__i___ 7,975 Q) -0 --- . --I __� ____� -- - \ \ N \ I-- ___� __ _____11__,1_1 -"--- — _, I--,' X _ \ I , �; �_ \ \\ __=__�:_1_J____1 - ! __±__�� i < Q , � - 'I- �_,,� 11 ; - _ - /I 'I I- - ;9 , 1. I, I L1T9Lh__._yyi!!!k__ I 0 .L' _�, _ I \ � \ - ____ , I. X __ I I _1.1_____.____________..__ -, ,-,- *> ) " ,,� % ___ I- � Z I F____T__-::::1:=�� — � __ __ � ---- --- _��� - --- , I 1/' / - \ � X \ --.------"-- no, subtotal (D 0 THE IMPERVIOUS AREA. MINIMUM PHOSPHOROUS REMOVAL RATES FOR FACILITIES \ " I � I \ ttb � - -- ---- -_--�-,_, ,� / , _____` __ / __ �, " \ \ lrnpphous ��Taa wthin lGt& 1 30M -C E 1, 2 AND 3 ARE 10%, 25% AND 14% RESPECTFULLY. THE FACILITIES ARE ALSO 1 � '�� -1 __ �� / __ __ _____ .- '__-, -1 \ ,\ / / , " " U Z( ,% ", ____. �-------____- - - " I I \ I I - , 0 C) � - __11__1_1____ i , \__ .11 -1, �. ___ f I I _.� - jo �� "'II "" 11 I-- / I- - ----- t----,,4', :::= --- __ ,-- t_-_ , 7 a) , ___ " � -, i I � -(P "� 'V ,:�, I _�, , , I 11'\ / - _` "_______,_,_,____!__ ____t_____.. I - -t �� _ _±________1 - ----- i _11 0 6 0 _;�'__, '---,, ____,� ____ I \'% / N�/ __1 e., ..rq I - I :, 'III' -, - . ,:.�"%'.41, / / ,* "/, \ / 5 \,�, -- - \ I/ , \ :�-,',.'.�,,W-,'�. � _-) DESIGNED FOR A MINIMUM OF A 3o HOUR DRAWDOWN WITH 2x THE WATER QUALITY / / .... \ � / - - , - , ______T_____ - 7 I) I / �_ , -- , I / 'I/ - ,-, __._ , _______ _._1_ .... I,---- C\1 r_ - `P - ,� �_�' - I , , ______ -,---- , ______1 __1 % , -,,, ` , ,__ -, \ ::,:`r�,-�,:- � \ / "\ �__- - �, I " , � 13NOT __ - . � , \1 ) \ " , / ) / \1 -_ ,\ -- - I / / // 1 _�, -,-� �� ---,-- =-, - _,____i_.___ -----"- -_ - I _____.__1__1 _____,_� 0J VOLUME. FOR EVIDENCE OF THE WATER QUALITY TREATMENT, WATER QUALITY \\., / , , ,,- ,,,, ", '. _ `:a' " �, / "I, \ /I I I ." A _" I I-l" I / /` Agres I � 41 , , - _� I I, " "� , ,� - --�--� --/*--- --_ \ - I I - . , / / �4, ,->-, V -Y ` ___� I., /�_ _,-- // ) I 1-----,..j -----I. 0, To = i Z C: =3 ,VOLUMES & DETENTION COMPLIANCE, PLE - , " -11 0 W C-11 - __ _,�_� `C� , 4. / / " _- � , I �___I)�_0_71��___ ___ _ -----_-----I 4> -0 , ASE SEE THIS SHEET AND THE _General construction no,tes for Stormwater Management plans , , 1.1--` / 4 -,,,, I / I t I 6 i�_e_S,_,___" I Ra- � l i ',\ - I / / .."' ,,,,,,,, / ) I / , / , ,��S!_ no. SUM Area subtotal U _4 � f- 11 />�X�V/ I/ , Iq I / _._111__._1_ . i E - I , 1. I I \ ",I- � i i ____ =__-__��-_---_--------- :3 G) FOLLOWING SWM DETAILS & CALCULATIONS. 1_�i. All dams and constructed fill to be within 95% of maximum dry density I \,) -,.,_ \ ,I, /-0 �,_� / � __1 I 1 Z .---,..-, / / '.1 I_" // i I I i ',L-4--+-- i I __f_______1 UJ (>.?! I - I / I . / ,Z ** - _,"� / II ,_ . I , I I " 11 IIZ , — __ _ _____4 -1.1-1. 0 rn _� ', ', 1"",' \ -11 , -, �, /I -_ __� � I I r---,-- --- 15 .J _0 = and 2% Of Optimum moisture content. All fill material to be approved by '/ / / ' # / i I \ � \ . f F.% , \ ,,-' / / I / r _t=t1____t_1____- * UJI .....--q-, . 4E6 - . I -a PLEASE NOTETHE SOILAROUND THE SPILLWAYSARETO BE AT 9S% COMPACTION / . / ) ,,-- (��, "61, \ / / '�',�Z I - � / --- ZI/ - �6i�;i___________ A.ma__ -_ - -_ _�_ ,____,__i L _0 C: k.,..,. ��p . , / , / _� * I I'll / / / __ �3:§7?j 0.08. 1 32�1_Z11!".17_-__ 59L911 . WITH AN IMPERVIOUS CORE AND CUT-OFF TRENCH. THE EMERGEN / IV "I �-_ " I- \ -'.,, / \ , I ___ i _ _________.___1_ O� UU (D - � I I . :i.3 -,,,-,-. , . 7�� 1 , :,� . / 'I, / - _ - I I d Area I Are-$ (D — Y SPILLWAYS a geotechnical engineer. A geotechnical engineer is to be present during f I , , X / n _11, ____ _J � , -1 � - / / / / "W / "I - ,W-.�,, / 11f I \ - ��iT��I�i -- - ------ - ix 0.26 � i ! _________�x0.25= 3: 3 " .. - I _ .1__1____ . .... __ ....... --.-,.--,, __J__.__._____ r' W .L \ _-, 1____-_-_,__ - , ______________ ___._1 - 0 Q) , ."", / : .. " I I / 'A 11 � \ T I 0 > , ., ,�.: " I \ "'.... I ;" � - 1, �, CL �`�,.,:-� "', z/ z��, � _... 11 /ARE TO CONCRETE OR GRASS LINED AND DOWNSTREAM OF THE SPILLWAYS ARE TO , / 'Ile �, "Ill ,5 I" I / , �Lj� I 1 I construction of dams. 1Z ,/ ) , .�"".-'..; , -71 11 / * / / / 11 i " % - I `__" - , " �� N'. ,W-47�,.� VP ICI ,Other tin peNous Areas I �::�:.;�*.`....-.,,, - � 11 1 , ,.,.,:, �. // / / )G 81C ----I I i 306 NO, U) CD BE GRASS LINED. THE FOREBAY SPILLWA , 1� ,.�, � , , - ., 11" _________ ---- ,-.�--.----.----.--.--.,-.-,-�,,� __._____________ . ..... . _____,_.___.__.. 0) 0 - I � __", __', -- / I - / InVervious Cover � I a on BASKETS WITH Y8" STONE STONE ON THE UPHILL SIDE OF THE WEIR. / r I ...., ,_ ,,, / - _--4��7,� - � Z , / i �_ =:i2ij 102054 - ,-management facilities. / / 11 _�� ��__ - ,,__,�-��_ I SHEET FLOW/Tc= oaSh . ,30 / 320 __,7�__�_ - f(P-1 I(Post). I/ -0 0 . - / / / / / / / _\ �__, , ;:., .141 .......... 3 / / / � // - U I / , _r_ � YS SHALL BE CONSTRUCTED OF GABION 2. Pipe and riserjoints are to be watertight within stormwater / / _... ., �, �� /- / �� -1 ___ .01., I - _� � � \ I--- / / 1_ � __ _,/ / ,�, - / ; , 5-/ // It , //)100/1 / I'' 1 � _____ C '� ,/ '.':�� ..-w- Z= / I ", ,/ i�,�_ _?! 0 i / / 1�' - . � ", J/ �� ....... �, .- . -- tONC. FL, 76W T 0. , r,�. I - —, , - SCALE HALL REMAIN IN PLACE FOR AS LONG AS 3. For temporary sediment traps or basins which are to be converted to / ",, / .1 , , :- - '� - ""... �W_,.,., / / / � ,,, - ADDITIONALLY, ALL EXISTING BICIFILTERS S 1 ,::.%1M.'i I-- . __ . , ?_ - -; .. ----,- / __ 'e. _".7"'. . .._.:�* -%,:�.:,_,. - -1. , - - .4 �_� I =Pl� 100, Y'. - CHANOE C= 0 0 . New Develogirmat (For PnLt�loranent " —r �= 20%) C: (n / / *,,� � 00 � , " / , �LOW , hrs, 'I 11 \ - __ , ?�!�y�T!��!"��11-----,-�-�-----,�-",----�-----. NO. 2 0 -.-'-'I- —,.., .A., _� Tc= o.�fflrs,.' , - — - ___6___L__J___ , '�� -'=_-,!91S e�l_-I:Area _____! � L � . �:. , .L' - - � R t POSSIBLE DURING CONSTRUCTION. permanent stormwater management facilities; conversion is not to take i \ �.,�.-�...-_ -._'1i'_ 1.V-",';1-' I , a i I ,�t 7 \ )_ __ I I FINAL 6 _> 1_ I , i��gp � "P14--�*r!- -- f "' ,��reaType � I1� T 1) / -, I ------r"�---l�l---.--..--�-111.--..,.-j :3 i :;;!�,... , _ -1 - _ 'AL�UL I ?/N S / / ,,--- _____ --- -.,, , J Q> 0 - DOWN TIME FOR " " , � ___ __ YRRV1_!�� _ _ ''� - ., - __ I '.." . i 4��, -1 . fl 16 - �' ,F / , . 3' 1 � 0- / '4W." . . , "/ , �� � ., _P .0 " ., ,� , , =1* 1 L i - � ,�'. '1/ / I Q .� , ,\ ` ,.� , _ / / I � �-�,,,71!W;A - ., _P place until the site is stabilized, and I , i .W.11". -.1 .. .. ..... :_ __,_11 "I ,� /11 .�..::� _,.__ !.____�_ __ ___ _ __ _ � i. ,,/ V1 - " W . , "'.. ; R SEE �4 H I CS -& .� 11___._-_____1_____J �,.;. ___________ ______ ____.____ i - � '�"- ALL LOW-FLOW ORIFICES ARE DESIGNED FOR A 30-HOUR DRAW i I , I I - / / /,f, / 1 , , .____L_____J_.___J . �i ---�..",�.---�.�-,.-,�"---.�---"�.�-11--.,� V) / . I ` 0 > - , ___ _ . � � __ � i L_ \ - -71;1 . I '� / OR'AD � A �TAI / // �xlc h z\ IbU '�,_ _- ___ / * Tinn. values , __ ,I-- r- " .. , 71 L��1,111 IN 111", - .- I ", _ �.. �, , m.. a - " 11 , .. O� . F J _permission has been obtained from the County erosion control inspector. I � r, Or , i!�c E f t� � 7 x .TVO TIMES THE WATER QUALITY VOLUME IN ACCORDANCE WITH. DCR'S VSMH. i 1_� - / I /'/ L I- __�� _Z _A_ -I / i - , _Z____ 1� �,__ I 11 I / I I I I I l- 0 -_ - . . I . I I � � , -,-- I , _ . � - - I I � . ( I � \ I L 11 / , _�,. .� " / I I/ I I � / 4 � Aff' N'J '' I UMMMEMEA1 � . i I � ; : O 1 y Water Quality Volume Requirements: Routing Method: storage- indication Basin Input Data Inflow Hydrographs TH { r 2' 0WIDE VDOT CL. II EC -1 RIPRAP LINED EXTENDED DETENTION BASIN #11 REQUIREMENTS: �F + z -Year, SCS 24 -hour Storm 7 Contour Areas 3 Inflow Hydrographs SPILLWAY AY CLE`OTEO SX FILTER FABRIC Minimum Forebay Volume= 0.25 inches per impervious Square acre inflow (cfs) 10.202 at 11.95 (hrs) Elevation(ft) Area(sf) Computed Vol.(cy) Hydrograph o f 1 EXISTING TOP OF DAM Forebay Depth to range from 4'-06' a 2.00 00 0.o O 1 ; UNDERLAYMENT TO EXTEND TO TOE OF y p g discharge {cfs) 9.079 at 1z.o1(hrs) 9 3• SCS AM SPILLWAY CREST ELEV. = 300.50 ELEV. = 302.00 Gl Impervious Area- 53,$94 3.f water level (ft) 300.401- at 12.01 (hrs) 294.00 127.00 3.7 name: 2 -Year, SCS z ur Storm storage 295.00 26 .00 10.9 Area (acr SCOTT R. COLLINS' 4 9 (Cy) 240. s Minimum Forebay Volume= 1,123 cf 374 2 600 � 5.440 0 CULVERT FINDERN�'KATH 9 544.00 25.6 77.800 U No. 35791 A CEaS'S EA� 'HEN ROAD TO 1 Minimum Water Quality Volume = 0.5 inches per imperious square acre 10 -Year, SCS 24 -hour Storm 298.00 2187.00 88.2 Type 2 O FALL DITCH INT SWM f Minimum Water Quality Volume= 2,246 cf inflow cfs) 20.000 at 11. (hrs) 300.00 2057.00 206.9 rainfall P in y t 95 ( ) 3.700 „_ ✓1 IC( Its HANSON CONCRETE f 2x Minimum Water Quality Volume= 491 of discharge (cfs) sg.654 at 22.95 (hrs) 302.00 3oi6.00 393.6 time of cone. (hrs) o.1600 �,� FACILITY ANTI- VORTEX '` -_� r_ v water level (ft) 300.6 1 at 11. (hrs) time increment (hrs) o.oua �'S Cs1 o `1 Elevation Corresponding to 2x WQV= 298.60 ft 9 95 Start - Elevation(ft) 292.00 VOL(C) 0.00 `�10NAL E� storage (cy) 263.475 Y time limit (hrs) 30.000 k TRASHRACK, OR -,� fudge factor s.00 1 EQUIVALENT f 7 HN WATE QUALI?�Y } y Extended Detention Basin #'I soo -Year, SCS 24 -hour Storm 5OutletStructures routed true LUME REQUIRED' Area of Total Area of inflow (cfs) 39.836 at 11.95 (hrs) Outlet structure o structure 3 peak flow (cfs) 10.229 .2xW V - 4 4 'C W �'R Elevation Volume Volume discharge (cfs) 39.4o8 at 11.95 (hrs) Orifice Culvert peak time (hrs) 11.938 O J- , .f Forebay Elevation (ft) Basin X24" CL. III RCP .MUL ACE 00 (cp (cf) water level (ft) 300.961 at 11.95 (hrs) name:3ohr Drawdown Orifi name:Barrel volume (cy) 1195.940 QUALITY E TRASH RACKS SHALL BE Contours (sf Contours (so storage (cy) 287.796 area {3.f) o multiple 1 Ln Pl2O IDED- O,628of INSTALLED ON ALL RISER RZAf EZEV = 30f.00 diameterord in) 2.000 discharge out of riser Hydrographs ORIFICES PER VSMH THREE -06 AfFD -FLOW ORIFICE 292 0 0 292 3 0 widt rect. (in) o -000 D (in) 18.000 SCS � TECHNICAL BULLETIN #7 » 2 coefficient o.600 h (in) 0.000 name. SCS 24 -hour Storm h e � WM A S SLOPES SHALL BE <10� ELEV:= 298.68 &� ONE-Of" LOW-PLO ZJ4 t� Q X94 1�:? 100 lg t invert (ft) 292.000 Length (ft) 88.000 Area (acres) 5.440 p AN SHAL HAVE N EARTHEN SURFACE. ORIFICE @ ELEV. =292.0 2ca 17 6 295 269 293 g w �99CS 60 296 544 692 multiple 1 Slope 0.011 CNT e772800 ¢ O ORIFICE COEFF.= 0.6 L discharge out of riser Type n 0.013 Yp m 11 t O ' DE FLAT BENCH AT T E 298 344 483 _ 2'98 1,187 2 ,382 Inlet coeff. Ke o. oo rainfall, P (in) 5.600 O 18 CL. 111 RCP 5 rn w Outlet structure 1 Equation constant set time of cone. (hrs) o.1600 i- 'W �-- _ THE EMBANKMENT O(Y BARREL :Ota 712 1,Sr 30t1 ?,OS� 3 86 q 3 z z OF THE FACI ITY 2u �/ PERFORATED STANDPIPE. SEE 88.00 LF @ 1. 11-' � orifice Invert (ft) 289.000 time increment (hrs) 0.0210 w � w / a - 362 - 302 3,016 10;628 name:Mid -Flow Orifices time limit (hrs) 30.000 � Z � II III (I ( t 3.'1 SLOP ON HE INYERIOR O DETAIL ON NEXT SHEET. LOWER JNV 1N- 290.00 area (3.f) 0.196 outlet structure 4 fudge factor 1.00 w ILITY \& 2.•1 SLOPES SOLID PIPE CONNECTING RISER TO INV. OUT= 289.00 EXlStlrl 1=8CllitV es diameter or depth (in) 6.000 Curve routed true Z V w U ABOVE T E BENCH TYI.1V•C' INTO PERFORA TED STANDPIPE SHALL BE Total Area of width for sect. (in) 0.000 name: vortex peak flaw (cfs) ao -053 O Z t9 Elevation coefficient o.600 multiple 1 peaktime(hrs) 11-.938 z (D z EXISTING V'ROUND. BURIED BELOW GRADE. Basin Contours Volume (cf) CL z RISER FOOTING {) invert (ft) 298.68o Invert (ft) 301.000 volume (cy) 2344.531 Z p w w (; f'�' pj �%�j (S multiple discharge into riser V g V w � 7 iJr SPILLWAY �' !' A dischar e into riser file: twentyfour.txt Hydrograph z uj _j _j > IT_I -1 I I at (NOT �7 r T L� 291 n/a n/a g SCS o o z III I i 1 V O 1 t o ALL' name: loo -Year, SCS 2 hour Storm z e 292 n/a n/a outlet structure 2 4- O V w Area (acres) 5.440 z w w I - WIN. FOREBA YE VOLUVf 294 n/a n/a weir ,,, J s _ y 100 YEAR name-.Proposed osed S illwa CN 77.800 , , z III-) I W S.E. = 300.96 length (ft) 2o.000 O i IMP RF'Q D= > 123cf. !F'OREBA 296 4t13 p Spillway Type 2 ¢ ¢ side angle 45 -000 rainfall, P (in) 9100 � w w V YOI�UME P O�IDEl 51 %i f Z98 873 I.4i time of cone. (h3.) 0.1600 h I lrlI- 10 YEAR coefficient oo a m J _ W.S.E.= 300.69 3flC1 1,4 3 >561 33 timeincrement(hrs) 0.021-0 U) O Q r3.: invert (ft) 300.500 w Q 'I I I =11 UP,ST EAM t 2 YEAR 302 ,163 7,176 time limit (hrs) 30 -000 N � multiple 1 ItJ f 1- ,x HI _ =1 I VEGETAT1'VE 4.. W.S.E. =300.42' fudge factor 1.00 n. w I [-I I ( - NOTE: P sea facility volumes are greater discharge through dam g ��, m routed true D � `a3 _ �7,7 ,t - -• MIN. FOREBAY COMBINED th istin facilit volumes. Thus NO FILL w ¢ -.. MIN.. WATER UALITY VOLUME g �` 10 WIDE FLAT BENCH AT THE EDGE OF eak flow (cfs) 39.940 W to VOLUME REQ -D f,M3cf. PROPOSED WITHIN THE FLOODPLAIN eakfl0w hrs 9- 8 (n Ce REQUIRED 2xWQV - 4, 491.. FACILITY w/ 21 SLOPES ON THE INTERIOR p ( ) 93 LU TOTAL FOREBAY .VOLUME ( J- f � PROVIDED= 1,517. WATER QUALITY VOLUME HANSOM volume (cy) 4669.797 �= --• •f TOP OF FOREBAY DA OF THE FACILITY & 2.•1 SLOPES ABOVE 0 PROVIDED= fO 628cf CONCRETE EXISTING TOP OF DAM BASIN TOP OF DAM - ' THE BENCH TYING INTO EXISTING GROUND. vi ANn- VORTEX WIDTH- 1.0 AT AN ELEV = 302.00 ' 100 YEAR TRASHRACK, OR WIDTH= 10 A T AN ELEVA TION= 300.00 w ' , 1 1 WIDE FOREBA Y TOP OF EQUIVALEN 20 WIDE RIPRAP WEIR ELEVATION= 302.00 W.S.E. = 300.96' 2-YEAR STORM EVENT Ce 3 DAM ELEV.= 300.00 T- OUTFALL CHANNEL. 10 YEAR DOES NOT CREST THE MAX. EMBANKMENT W.S.E. = 300.69 EMERGENCY SPILLWAY EXISTING TOP OF 2 YEAR j HT- = 6' (302 -296) '\ 100 YEAR DAM WIDTH= 10' W.S.E. = 300.42 S E. -300.96 » .. • ... '>, .'.'.� c,� _ AT AN ELEVATION= » - N - -- - - - -- -- -- -- -- -- -- __- - -- - - - -- YEAR 02.00' 10 OF N \ - - -- _- - _ , 3 C�a�J a PONDING �, _ _____ _ -_ _ ._ - - -- --- ��_ 1.04 OF �n - -- - - - -- .S 3 9 DEPTH 3. ,r FREEBOARD 1 Ln .... BOTTOM OF ORIFICE C ©EFF. = 0.6 , k 6 ¢ n ` N rn p p DURING THE o N ELI n n FOREBA Y t 4 _, ,� --------- - - 100- YR UL VERT UND NEAT ELEV. 292.0 , _..�. tti' STORM EVEN AC EARTHEN D TO FOREBAY & 5' WIDE FOREBAY SPILLWAY OUTFAL OADSIDE DIT6''H SHALL BE CONSTRUCTED OF GABION MIN. 8' WIDE @ TOP & 1 , - ��- T.1V.'I-'0 S `4C�TY BASKETS WITH VDOT #3 COAR BOTTOM OF DElEN770 CL. III RCP 10' DEEP IMPERVIOUS SIN 's BARREL SHALL 5 WEIR COEFF. = 3.3 20� W COEFF. = 3.3 z - AGGREGATE ON THE UPHILL SIDE E BASIN= 292.00 MUL T- -STAGE RISER. CORE & CUTOFF OUTFALL INTO PROPOSED 'Wx23'Lz2 D ' OT CD II, EC -t WEIR & CLASS I RIPRAP ON THE NHILL LEVEL SPREADER PRAP LINED JUTLET PROTECTI SEE THIS SHEET FOR 18 CL III RCP TRENCH WITH 1:1 SIDE 1 SIDE OF THE WEIR. GE TILE FILTER SLOPES. SEE DETAIL ON IMMEDWTELY UPSTREAM FOREBA Y SPILL WA Y w/ GEOTEXT1 FILTER FABRIC DETAILS BARREL SPILL WAY ELEVA TION= \ FABRIC UNDE MENT SHALL BE NEXT SHEET FOR OF FLOOD PLAIN AREA. ELEVA TION= 296.00 ' UND•ERLAYME1trr TO EXTEND O THE INSTALLED. W HALL HAVE 1:1 SIDE 88 LF @ 1.1 % ADDITIONAL INFORMATION. SEE 7 FOR ADDITIONAL 300.50 2D WIDE RIPRAP WEIR L9 ,F BOTTOM Off' THE FACILITY LOPES w/A CR ELEV. = 296.0' S'(W)xg'(L) INV. IN= 290.00 INFORMATION. OUTFALL CHANNEL S FACILITY #1 INV our= 289.00'. EXTENDED DETENTION BASIN #1 (?IIJIBA�'SPILLWAY EMERGENCYSPILLWA . SCML& 20 i I III jlllil., UTs Routing Method: storage - indication Basin Input Data Inflow Hydrographs M I= E L T ENGH fAT TH i ELtO..t;" CY5 � Z 20' WIDE VDOT C& II, EC -1 RIPRAP LINED Water Quality Volume Requirements: 2 -Year, SCS2 hour Storm 5ContourAreas InflowHydrographs � ANK ENT 6N CUT SIDE 'OF • SPILLWAY w GEDTEXTILE FILTER FABRIC EXTENDED DETENTION BASIN #2 REQUIREMENTS: inflow (cfs) 8 007 at 11.94 (hrs) Elevation(ft) Area(sf) Computed Vol.(cy) 3 Hydrograph o N t- 4 1 -1I I 111- E A .L Y 3.' '/SLOPE ON THE UN,DERLAYMENT TO EXTEND TO TOE OF discharge (cfs) 0.441. at 1.3.02 (hrs) 334.00 4211.00 0.0 SCS d- Q6 (--- _ I=11r1 f I EI> O O THE tFACILITZ & 2.•1- DAM.' SPILLWAY CREST ELEV.- 339.75. Minimum Forebay Volume-- 0.25 inches per impervious square acre water level (ft) 336.992 at 13.02 (hrs) 336.00 6722.00 401.3 name:z -Year, SCS 24 -hour Storm (� OP A V T 14EMCHI TYING INTO SPILLWAY SHALL HAVE 5.•1 SIDE SLOPES TOP OF DAM Forebay Depth to range from 4! -6 storage (cy) 673.656 338.00 9686.00 1.005.7 Area (acres) 3.98o ( � ELEV - 341.00 Impervious Area= 49,713 sf 340.00 12250.00 1816.3 CN 79.400 L/ HANSON CONCRETE Minimum Forebay Volume= 1 036 cf 1-o -Year, SCS 24 -hour Storm 341.00 13438.00 2291.8 Type 2 / /'1 Z) / x B inflow(cfs) 25,372 at 11. 4 (hrs} rainfall, P (in} 00 �j 1 Y BOT 9 3 7 OM - AN VORTEX U Minimum Water Quality Volume 0.5 inches per impervious Square acre discharge (cfs) 2.317 at 12.30 (hrs} Start-Elevation(ft) 334.00 Vol. {cy) .0.00 time ofconc- (hrs) 0.1600 N /p E MBINED IRA SHRACK, OR Minimum Water Quality Volume= 2,071 cf water level (ft) 338.343 at 12.30 (hrs) time increment (hrs) 0.0200 0 J T A 0' 6 E EQUIVALENT � � � 2x Minimum Water Quality Volume-- 4,143 of storage (cy) 1131.479 time limit (hrs) 30.000 N Q fudge factor 1.00 Elevation Corresponding to 2x WQV= 334.76 ft loo -Year, SCS 24-hour Storm 5 Outlet Structures routed true N inflow (cfs) 30.112 at 11.94 (hrs) Outlet structure o Outlet structure 3 peak flow (cfs) 8.013. < W r Extended Detention Basin #2 discharge (cfs) 1.5.473at 12.10(hs) Orifice Culvert peaktime(hrs) 12.938 > water level (ft) 339.757 at 12.10 (hrs) name:3ohr Drawdown Orifice name:Barrel volume (cy) 936.609 Area of Total Area of Elevation Volume Volume storage (cy) 1707.51.4 area (sf) 0.012 multiple 1 W J Forebay Elevation (ft) Basin diameter or depth (in) 1.500 discharge out of riser Hydrograph) \ j TRASH RACKS SHALL BE >�24" CL Ill RCP rifl/LT1 -STAGE O Contours (sf) (c Contours (sf) (cf width for rect. (in) 0.000 D (in) 18.000 SCS � ~ 1 / INSTALLED ON ALL RISER RZV ELEV. = 338.75 w/ coefficient o.600 h (in) 0.000 name:1-o -Year, SCS 24 -hour Storm THREE -PIS' MID -FLOW ORIFICES 0 Area (acres) 3.980 ORIFICES PER VSMH invert (ft} 334.000 Length (ft} 64.000 f j i TECHNICAL BULLE77N #7 ELEV =336.75' & ONE - 014/2" 334 951 0 334 4211 0 multiple 1 Slope 0.005 CN 79.400 (f) 7� W LQIi =FLOW ORIFICE 0 ELEV =334.0 336 2,058 2,939 336 6,722 10,836 discharge outofriser Manning's n 0.01 W 3 Type a Q 1 f 3 { � Inlet coeff. Ke 0.500 338 3 606 8,531 338 9,6861 27 154 rainfall P (in) 5.600 1 ORIFICE COEFF = 0.6 0 q 3 conc. (hrs) o.1600 % FOR B Y T P O 1:' „ Outlet structure 1 E uation constant set time i of ement (hrs) o 0 00 I o ` w V 340 - 340 12,250 49 0.39 Orifice Invert (ft) 330.320 � j r i 18 BARRELRCP 341 - 341 13, 43f1 61, 879 name:Mid Flow Orifices time limit (hrs) 30.000 / 11 --11,= j / Outlet structure fudge factor 1.00 RIP RAP l _� I 1 0 t 64 LF ® 0.50% area (3.f) 0.136 Curve 4 grouted true a W �•- 1 �� / � / diameterordepth ( in) 5.000 L -1-3, W> -4. $', (I 1 PERFORA TED PIPE. SEE INV. IN= 330.32' width for rect. (in) 0.000 name: Anti Vortex peak flow (cfs) 15.379 Q r t I( r PROPO E c `�. #r244 5',.D- (i(- / °' CILIT 1 E' �' DETAIL ON NEXT SHEET. INV. OUT= 330.00' coefficient o.600 multiple 1 peak time (hrs) 11.938 _ UJI 1' 1 -I I i r Invert (ft) 338.750 volume (cy) 1798 -o U 1 ~` invert (ft} 336.750 75 1 227t.% f r t r COINC S W T discharge into riser r 1 / � ,p�. multiple 3 9 4:/ 1 i/ 1 /' PROP rR L N "t} / RISER F00%%NG discharge into riser file: twentyfour.txt Hydrograph 2 + -d 1 ,< / I I Iii I I _ 1 l f .. f0 WIDE FLAT BENCH AT THE EDGE OF SCS Co Z IIIl1III� °11 j Im" CL. /III RCP 1 11=1 I BARREL' I I =1 I -Ili_ Ii I� I CV -I 11- �rv, \ �fiiII " •.� i, 1111111 0� jLY RT D . TH _ .4/'1X r ApIr rr nen `.. PKINUPiX SPILLWAY THE EMBANKMENT ON CUT SIDE OF THE Outlet structure 2 name: loo -Year, SCS 24 -hour Storm J Area (acres) 80 r / IQ l �. FACILITY w/3.•1 SLOPES ON THE INTERIOR 100 YEAR Weir CN boo W i 171 N. AT �AL.I NOT TO AL OF THE FACILITY & 2.1 SLOPES ABOVE name: Emergency Spillway 79.4 W. S E. = 339.76' Type z (-- ' IQ1 I' I. / THE BENCH TYING INTO EXISTING GROUND. length (ft) 20 -000 Yp _ sfj ,E OL ME ,tE'Q IREY 10 YEAR side angle 78.460 rainfall, P (in) 9.100 Ul X143 f. WA W.S E = 338.34 coefficient 3.300 LL ":�� , time of cone. (hrs) 0.1600 � r 1JA Y V LU E invert (ft) 339.750 time increment (hrs) 0.0200 W t � V D= 1, C s �'• i 2 YEAR multiple 1 time limit (hrs) 30.000 BASIN TOP OF DAM _ fudge factor 1.00 0 , 100 YEAR MIN FOREBAY COMBINED WS.E.= 336.99' discharge throughdam g W Q WIDTH= 10 A T AN MIN. WATER QUALITY VOLUME routed true 1�1 ( VOLUME REQ'D-- 1, 036cf. 10 WIDE TOP OF DAM # / �y F W.S.E.= 339.76 REQUIRED (2x)F'QVj= 4,143.f. peak flow (cfs) 30.125 ��� W ELEVA 710N= 341.00 TOTAL FOREBAY VOLUME ELEV. = 341. DO �' � I 1 / f 10 YEAR FITER QUALITY VOLUME peak time (hrs) 11.938 rr �' �''�� _ - PROVIDED= 8 531.E - y i WSE:.- 338.34' PROVIDED= 61,879cf HANSO WEIR ELEV.- 339.75' volume (cy) 3522.231 I-- U TOP OF FOREBA Y DAM CONCRETE U? WIDTH= 2 AT AN 2 YEAR ANTI - VORTEX 20 WIDE RIPRAP WEIR mi W r _ - i R IRA 0 a.. 2 & 10 -YEAR STORM (- / ELEVA TION= 338. DO W. _ >. E. - 336.99 OUTFACE CHANNEL w/ 5: 1 1 f 2 WIDE FOREBAY TOP SIDE SLOPES EVENTS DO NOT CREST THE F" V l F'BA /, 2 {' L I OF DAM ELEV = 338.00 `• EQUIVALENT EMERGENCY SPILL WAY W (f } TOP OF "y LT T E E RIM �i MAX. EMBANKMENT � ;� w � TOP OF DAM � W w/ a H E - '• ID -FLOW �' 4 HT. =9' (341 -332) WIDTH= 10' AT AN ' , 1 , - - - - -- -- - - - -- - - - -- --- - - - - -- ---------------- - - -c?, :4 W , LEY. _ S,36.76 ' N -- - - - - -- - ------- - - - - -- - - -g -- ,\ 100 YEAR ELEVATION= 341.0 _ _ - - - -- - -------------- -- -- - - --- -- 7 OF W.S.E. = 339.76 w N -0 , LOW -FLOW t es s IF CE @ LEY. = 334.0 ' \ T PONDtNG CD � ' <• " �� � ,, ___�------- - - - - -- - - - - -- - -- BOTTOM OF DEPTH X 1 24' OF ; - OR AY & 5 WIDE; FOREBAY S LLWAY 4 +\ ORIFICE COEFF.= 0.6 r , FOREBAY ELEV ti ',`4 \ FREEBOARD SHA L BE CONSTF�UCTED OF GABION ,�. 334.0 .` . \ `� DURING THE BAKETS WITH V OT # COAR E �t.<.�... .: c3� \ 100 -YR , h' STORM EVENT 11 3 Uj AGGREG TE ON THE PHILL SIDE O THE � � � _ \ 1 --21x OREBAY TN/EIR & CUSS I RIPRAP 6N THE DOWN�iILL �•. 5 WEIR COEFF J. BOTTOM OF DETFN770 ITJ LU N FOREBA O NE ti FOREBAY & ' WIDE FOREBAY SPILLWAY BASIN= 334.00 MIN. 8 WIDE C� TOP 8c O [ 1''� w s. SIDE OFT E WEIR. GEO EXTILE FILTER 5 V Y &UME 4 c . z SHALL BE CONSTRUCTED OF GABION CG Ill RCP 8' DEEP IMPERVIOUS 20 WEIR COEFF. = J. a f �tiw FABRIC L�'NDERLAYMENT SHALL BE i PTO AiY � U�ifE � � 1 FOREBA Y SPILLWAY BASKETS WITH VDOT #3 COARSE MOLT =STAGE RISER. . IF�ISTALLED -WEIR SHALL WAVEI:I SIDE � ELEVATION= 334.00 AGGREGATE ON THE UPHILL SIDE OFTHE SEE THIS SHEET FOR 18" +CL' 111 RCP CORE &CUTOFF roe No. OED= , 539cif \ SLO ES W/ A CREST ELEV. = 334.0' 5'(W)X14'(L WEIR & CLASS I RIPRAP ON THE DOWNHILL DETAILS. BARREL TRENCH WITH 1: 1 SIDE 102054 ` SIDE OF THE WEIR. GEOTEXTILE FILTER 64 LF ®0.50% SLOPES. SEE DETAIL ON 20 wnDE RIPRAP WEIR FABRIC UNDERLAYMENT SHALL BE INV NN= 330.32' NEXT SHEET FOR EMERGENCY SPILLWAY OUTFALL CHANNEL w/ 5 :1 SCALE FOR �7 SPILL ��jj �' A l V Y A & INSTALLED. WEIR CREST ELEV.= 334.00' INV OUT 330.00' ELEVA TION 339.75 SIDE SLOPES AS SHOWN NTS I= ADDITIONAL INFORMATION. SWM FACILITY Z EXTF'NDED DETENTION BASIN #2 FMRRGE VCYSPILLWAY SHEET NO. I i! -I I I 1 1-1 -I I I 11=1 III l I l =I f i_ , fi,• SASE.° 1 -9 ' NTS NTS 8 f 48'x 5' FOREB,.�4Y_'BOTTOM MIN. FOREBAY COMBINED VOLUME °REQ'D= 1, 499cf. - "' TOTA-L FOREB,4Y VOLUML`�d >' r PROVIDED- 5, 3.$8cf FOREBAY &:5' "DE FOREBAY SPILLWAY SHALL BE CONSfkUCTED OF GABION BASKETS WITkt � VDOf#3 COARSE AGGREGATE ON THE URI4LL --_ /,�IDE OF THE WEIR & CLASS 1 RIPRAP QISTHE DOWNHILL SIDE OF THE WEIR. GEOTEXTILE r r r +r ri� v�r �c�• .1' • _ • �N ���. ern. • • `• w 47* �►,,f,� \. , �r Y / J & W jLor- LO ORIF CE ®fELEY. 340 r+ Ila I SIAM -- FA Routing Method: storage- indication Basin Input Data Inflow H dro ra hs CILITY EASE1JE Tr 15' WIDE VDOT CL II, W-f RIPRAP LINED Water Quality Volume Requirements: COINCIDES W�I'H SPILLWAY w/ GEOTEXTILE FILTER FABRIC EXTENDED DETENTION 2-Year, ION BASIN #3 REQUIREMENTS; T OF UNDERLAYMENT ITO EXTEND TO TOE OF SCS 24 -hour Storm 6 Contour Areas 3lnflow Hydrographs v, e PROPERTY ' INE DAM. SPILLWAY CREST ELEV.= 347:50. TOP OF DAM Minimum Foreba Volume= 11.25 inches per impervious square acre inflow (cfs) 11.7og at 11. (hrs) Elevation(ft) Area(sf) Computed Vol.(c) Hydrograph a p p q 97 P Y f SPILLWAY SHALL HAVE 3.1 SINE SLOPES. FOreba Depth to range from 4'-6' discharge (cfs) 5.z10 at 12.16 (hrs) 340,00 1170.00 0.0 SCS O .' 10' WIDE AT BENCH AT THE ELEV = 349.00 Y p g 2• � f water level (ft) 344.794 at 12.i6(hrs) (hrs) 34 00 2439.00 130.8 name: z -Year, SCS 24 -hour Storm GE OF h'E EMBANffM NT ON Impervious Area= 71,938 sf storage (cy) 527.625 344.00 4564.00 386.1 Area (acres) 6.820 HANSON CONCRETE g SCOTT R, COLLINSZ OUT SI E OF THE FACILITY w/ ANTI- VORTEX Minimum Forebay Volume = F 1,4991 of 346.00 5889.00 772.2 CN 77,400 a 1." 10 -Year, SCS z4 -hour Storm 348.00 7197.00 1256.1 Type 2 L? No. 35791 ,'A. LOPES- ON THE INTERIOR f IRA SHRACK, OR Minimum Water Quality Volume= 0.5 inches per impervious square acre 1535.3 rainfall, P (in) 3.700 ' D T E FACILITY & 1 SLOP S inflow (cfs) 23,076 at 11.97 (hrs) 349.00 7887,00 1 EQUIVALENT Minimum Water Quality Volume= 2,997 cf discharge (cfs) 9.25o at 12.18 (hrs) time of cone (hrs) 0.2100 1P0 'j � t5 ABOYE T) E BENCH YING ItV O Zit Minimum Water Quality Volume= �,��� cf water level (ft) 346.769 at 12.18 (hrs) Start-Elevation(ft) 340,00 VOI.(cy) 0.00 time increment (hrs) 0.0220 1 'a l EX�STING 6 UNL? `ti Elevation Corresponding to 2x WQV= 342.66 ft storage (cy) 946.782 time limit (hrs) 30.00o 10NAL E fudge factor 1.00 2 FOREBA TOP OF` loo -Year, SCS z hour Storm DAM ELEV = 344.00 � 4- 5 Outlet Structures routed true c % , / Extended Detention Basin #3 inflow (cfs} 46.158 at 11.97 (hrs) Outlet structure o Outlet structure 3 peak flow (cfs) 11,761 { ,c0' UPSTREAM Area of Total Area Of discharge (cfs) 42.043 at 12.03 (hrs) Orifice Culvert peak time (hrs) 11.982 ` GE ATIVE B FFEhOf �• Elevation Volume Volume water level (ft) 347.943 at 12.03 (hrs) name:3ohr Drawdown Orifice name:Barrel volume (cy) 1473.592 ti t t TRASH RACKS SHALL BE 024 CL. III RCP MULTI-STAGE Forebay Elevation (ft) Basin ` 1U f { � {cf) (Gf} storage (cy) 1240.906 area (sf) 0.005 multiple 1 'MIN ATER QUALITY INSTALLED ON ALL RISER RIM ELEV = 346.50 w/ Contours (sf) Contours (sf) _ diameter or depth (in) 1.000 discharge out of riser Hydrograph 1 Ln 4 ORIFICES PER VSMH THREE -06" HID -FLOW ORIFICES ® width for rect. (in) 0.000 D (in) 18.00o SCS REQIiIRED TECHNICAL BULLETIN 7 °D - •-.:,- � � ��r - 5, �` ELEV = 342.66' &ONE -�>" LDFY -FLOyY coefficient 0.600 h (in) 0.000 name:lo -Year, SCS z4 -hour Storm 99 O.f. F, R 340 418 4 340 11.70 0 invert (ft) 340,000 Len th (ft) 40,000 Area (acres) 6.820 / ORIFICE CAD ELEV. 340. 0 ' g Y QUALITY ,Y[%LU��'', - a�$2 1,292 1,630 342 2,�I39 3,.532 multiple x Slope. 0.005 CNT Type Q w f fj OVIDED- 41,464c 'ORIFICE COEFF.- 0.6 �� discharge out of riser Manning's n 0.013 YP m !;t- 344 2,478 5,336 3'44 � 564 14 425 Inlet coeff. Ke 0.500 rainfall, P (in) 5.60o p O 61#EBAY' TOP O� 1'8" CL. III RCP time of cone. (hrs) 0.2100 U) � cn AJV 344.lID 346 346 5,839 24,$5€3 Outletstructurel Equation constant set 3 t.., to � f j BARREL 8 _ _ 348 7 „1 g.7 33 914 Orifice invert Eft) 338 -zoo time increment (hrs) 0.0210 Uj u Uz 3 r 40 L_F 9 0.50q � time limit {hrs) 30.000 �7 � v � name:Mid -Flow Orifices � Z g f OREBA�'7& 5' WIDF'FOREB Y / PERFORATED PIPE. SEE _ ^_ IN V. IN= 338.20 349 "" 349 7 =887 41,454 area (sf) 0.196 Outlet structure fudge factor 1.00 � I p SPIL WAY SHALL BE DETAIL ON THIS SHEET. diameter or depth (in) 6.00o Curve routed true O w O I �' IN V. OUI= 338 00 P z U W U CONS`fRUCTEfi OF GABON BWSKEtS YVITH V #A RISER FOOTING CO�RSE 4G�GREGAT�EtON HE �I� ��� A i UPHILL J)DE OF THE WE & Q✓ .C7* OWNHI+LL SID E& wiR. NOT 0 ALE' 3 l GEQ dXTILE FALTER PABRIC 100 YEAR /\ v . A I � F UI�Dt�RLAYMENT S ALL BE W.S.E.= 347.94' fi INS7 RLLED. WEIR SH LL HA 10 YEAR f tIDE SI!OPES w A CRE W. S.E. = 346.77 ,/ELEV. =j4o.o'.5'(, )xzo'( 2 YEAR. f / MIN. FOREBAY COMBINED MIN. WATER QUALITY VOLUME W S. E. = 344.79' / FO.�fEBAY OTTTJrkf VOLUME REQ'D•- 4 499c REQUIRED (2x#`QV)= 5,995cf. ' TOTAL FOREBAY VOLUME WATER QUALITY VOLUME �N MI1�. FO EBAY BIM RD PROVIDED 5,3360f PROVIDED 44 454cf HANSON T % VtLUME EQ'D 1, 499cf. CONCRETE 411 �� „l �.TOTAL�, %F REBA VOL M ' AN77- VORTEX 7RASHRACK, OR PROV�DED� 5, 336 f, 2 WIDE FOREBA Y TOP EQUIVALENT OF DAM ELEV.= 344.00 a, III I 9' OF P'ONDING DEP TH / BOTTOM OF b ORIFICE COEFF.= 0.6 r / FOREBA Y ELEV. 340.0 r l� FOREBAY & 5' WIDE FOREBAY SPILLWAY r / ! SHALL BE CONSTRUCTED OF GABION / 1 BASKETS WITH VDOT #3 COARSE BOTTOM OF DE7FN710 CL. Ill RCP AGGREGATE ON THE UPHILL SIDE OF THE BASIN= 340.00 MULT- -STAGE RISER. I f f WEIR & CLASS I RIPRAP ON THE DOWNHILL SIDE OF THE WEIR. GEOTEXTILE FILTER SEE THIS SHEET FOR 18" CL, Ill RCP BARREL FABRIC UNDERLAYMENT SHALL BE DETAILS. 40 LF 0 0.507* INSTALLED. WEIR CREST ELEV.= 340.00' IN V. W= 338.20' SWM FACILITY #3 IN V. OUT= 338.00' SCAM: 1.620, EXTENDED DETENTION BASIN #3 NTS SCREW CAP 6" PVC PIPE NTH DRILLED HOLES FOR PERFORA TION. SEE DETAIL BELOW. SCREW CAP AT BOTTOM FOR DRAINING /CLEANING PURPOSES ONLY CAP SHALL REMAIN CLOSED DURING NORMAL OPERATIONS. 90' ELBOW w/ < • . SCREW CAP RISER STRUCTURE NO 7E.- CON7RACTOR SHALL ANCHOR PERFORATED STANDPIPE BY PLACING RIP -RAP AT THE BASE OF THE PIPE. PERFORA TED STANDPIPE SHALL ALSO BE PERMANENTLY FASTENED TO RISER AS WELL WATER 77GHT SCREW CAP AT TOP. CAP ELEV.= 2xWQV ELEV MIN. (SWM #1 TOP OF CAP = 298.68 ) (SWM #2 TOP OF CAP =336.75 (SWM #3 TOP OF CAP= 343.00) 1" ORIFICE 35" O.C. VERTCALLY & HORIZONTALLY FOR SWM FACILITIES #1 & #3 PERFORATION SHALL EXTEND FROM THE TOP OF THE SCREW CAP TO .5" ORIFICE 3.5" O.C. IMMEDIATELY ABOVE THE LOWER VERTICALLY & HORIZONTALLY SCREW CAP. THE LOWER SCREW w FOR SWM FACILITY #2 CAP SHALL BE PLACED AT 774E BOTTOM OF THE BASIN's FLOOR. " PERFORATED PVC PIPE BOTTOM OF PERFORATED PIPE 35" O.C. (TYR) SHALL BE IMMEDIA TEL Y ABOVE 774E LOWER SCREW CAP, WHICH SHALL BE AT THE BASIN 's FL 00R. (SWM #1 BASIN FLOOR ELEV =292) " SOLID (SWM #1 BOTTOM OF PERFORATION PVC PIPE ELEV =292.75) (SWM 12 BASIN FLOOR ELEV. =334) " (SWM #2 BOTTOM OF PERFORATION 3.5 O.C. ELEV = 334.75) (Typ•} DRAINS TO (SWM #3 BASIN FLOOR ELEV =340) MUL 77 -S7A E RISER (SWM #3 BOTTOM OF PERFORATION ELEV. =340.75 PEMORA 7ED PIPE NOT TO SCALE' I I/R" zinc plated hook = 8-1/0' Ilia. holes t416 I ometri pipe Culvert { I TOPE structw -W flapilk with 2-1/8" bolt* an 110 ptate 5altatlow Tra- or equal i zteetu�ufe�urt�i try^ k']araitc f 1 0000 / show" with aptional plate !i[?S?T sod can +apr~on 67 1 (s t uctc HDPE staruaturM plikoUp vita 2f8" heel mitt 1,/4' plaite r >� Q iaufact rya by plastic Spintions ear aqual 6/5" raa, 2wtm C � 'VDOT ctrl. 1W-1 d angle LidP lev'&tion C so "hve Ned aecliiloe MP DEBRIS CAGE �W ' � - )LUTIO anrrr:pLislic-- amtnlfa�.acsa FIGURE 3,01 - 1 a Hoiis ogfeiseotis Eotbt nkitietits n*/,seepage- (.Uwrols width for rect. (in) 0.000 name:Anti Vortex peak flow (cfs) 23,179 O Z ea°Typ. InietlArea coefficient o.60o multiple 1 peak time (hrs) 11.982 48 a8 Z Vj Z 38 }/� 7 !/ se Ciutlet[Area 1\ � invert (ft) 342.66o Invert (ft) 346.500 volume (cy) 2904.303 n' Z = iZ t- Standr►rd Dimensions 2.26 �6 multiple 3 discharge into riser L <: V A w t i� tai ���� 13(7* discharge into riser file: twentyfour.txt Hydrograph z En CL Lu z Z z 62 4.27 54 SCS to _j -r O 0 72 9Ei 114 Outlet structure 2 name: loo -Year, SCS 24 -hour Storm Z 66 8i3 yf2 ' 98 w Anti- Vortex Cap O.Di . Anti- Vortex Cap;I.M,. 5.'39 72 Weir Area (acres) 6.820 O Z �a W Z 6 126 147 name-.Emergency Spillway CNT a -400 YP t`"'f) 84 m Q _J 1$7 1 8 -9q length (ft) 15.00o rainfall, P (in) 9.100 (1.) Anti orfex device (Gap and Meet) Manufactured in accordance with ASTM 0478. 4 sctlOn ; -A (2,) Dimensions subject to permissibte variations of ASTM G478. (8,) Inlet area (Area between device I.D. and riser ii.D.) is greater side angle 60.000 M coefficient 3.300 time of cone, (hrs) 0.2!00 than outlet area. (Area of riser I.D.) ce a. W m J Circumferential reinforcement to be A. 1 Q 0,150 invert (ft) 347•5Q0 time increment (hrs) 0.0210 p ,Q cover over t,-- 4 ksl, Concrete rover over relnfomenvnt .Na Scale- (CCOR) =1'", unless noted: multiple 1 time limit (hrs) 30.000 M Ae attmeris errs sul,JeBCtto to (5,} DIA Frame & Gra to Is available for 4V I.D. risers and larger, spe4f atlon tolemr vm rrs Q srnn aza[M VATS a w�s Precast Audi- Vortex Device fCap and Riser) VA 14.1 034 - 6 'o ■��+(iil♦"I� . fudge factor 1.00 to w 10' WIDE TOP OF DAM discharge through dam IL m routed true ELEV = 349.00' Peak flow (cfs) 46,364 W 10' WIDE FLAT BENCH AT THE EDGE OF peak time (hrs) 11.982 Uj tn ce 100 YEAR THE EMBANK.dfENT ON CUT SIDE OF THE volume (cy) 5809.282 I WEIR ELEV. = 347.50 / FACILITY w .S 9 SLOPES ON THE INTERIOR d BASIN TOP OF DAM W. S.E. = 347.94 w OF THE FACILITY c@• 2.• 1 SLOPES ABOVE En 15 WIDE RIPRAP WEIR 1 D YEAR THE BENCH TYING INTO EXISTING GROUND. OUTFALL CHANNEL W WIDTH= 10 AT AN / ELEVA770N= 349.00 W.S.E.= 346.77 LU J. 1 SIDE SLOPES. 2 YEAR 2 & 10 -YEAR STORM MAX. EMBANKMENT TOP OF FOREBAY DAM EVENTS DO NOT CREST THE WILT TH= 2' AT AN W. S E. =344.79 EMERGENCY SPILL WA Y TOP OF DAM HT. =7' (349 -342) WIDTH= 10' AT AN ELEVA TION= 344.00 �\ 100 YEAR ELEVATION= 349.00 W.S E.= 347.94' 1.06' OF ` _ > -- - - - -- ------ - - -_ �_� �� _ Ay FREEBOARD Ln 9'_- o DURING THE ' ------- � � 100 - YR 4' �c h n STORM EVEN \ ` -' �• if MIN. 8' WIDE ® TOP & 15' 8' DEEP IMPERVIOUS 5 WEIR COEFF. = 3.3 WEIR COEFF. = 3.3 z CORE & CUTOFF -_ L9 TRENCH WITH 1:1 SIDE EMERGENCY SPILLWAY SLOPES. SEE DETAIL ON FOREBAY SPILLWAY ELEVA7701V= 347.50' LRIPRAP LINED THIS SHEET FOR ELEVA 770N= 340.00 SPILL WAY ADDITIONAL INFORMATION. omogeneous fill :• -, \ ,,' mitt I ut off trenoh -4' below suitable I material 54317* tar rQGIi L ,�.. - ,«.., .-,. .,,,..,- ..,,,. w..,• ,...w.....,,. TYPICAL HOMOGENEOUS EMBANKMENT Traltsition fill Rock or gravel - pe outlet w =rs felt r rfo r frown SIM Perforated collector Blanket drain Fotlndatittn droin FOUNDATION DRAIN! BLANKET DRAIN Chimney drain Sand, smvel or reek droin Mlet 0 Rock or gravel Ro,.* tae drain Transition filter T- ansition filter CHIMNEY DRAIN' TOE DRAIN Btormvitater Management ea°Typ. InietlArea 3 Q 48 a8 • 34 1.45 27 38 }/� 7 !/ se Ciutlet[Area 1\ � 37 tl2 2.28 30 37 6[➢ t- Standr►rd Dimensions 2.26 �6 44 L 92 10. A 42 t i� tai ���� 13(7* Ile 3.96. 48 - \\IN *, L f 84 10t2 62 4.27 54 6fx tlg 84 Frame & !grate • '6" 0 vent 70 tlz Gast in Top Slab Std: �Q 72 9Ei 114 76 5.48 66 8i3 yf2 ' 98 114 Anti- Vortex Cap O.Di . Anti- Vortex Cap;I.M,. 5.'39 72 Notch Diameter 108 'l28 �a s.s� 78 ' 6 126 147 98'ltz $.87- 84 Anti- VortaX Ekiser 10- 126 1$7 1 8 -9q (1.) Anti orfex device (Gap and Meet) Manufactured in accordance with ASTM 0478. sctlOn ; -A (2,) Dimensions subject to permissibte variations of ASTM G478. (8,) Inlet area (Area between device I.D. and riser ii.D.) is greater than outlet area. (Area of riser I.D.) (4,) Slab rel0p cement to be ASTM A616 #4 bars @ 8" E W. Circumferential reinforcement to be A. 1 Q 0,150 2 x 6 W2:5 x W2.5 WMF minimum. Material properfas:# 'a.4,000p.s.t.,ty =50,000ps.•t., concrete cover over t,-- 4 ksl, Concrete rover over relnfomenvnt .Na Scale- (CCOR) =1'", unless noted: Ae attmeris errs sul,JeBCtto to (5,} DIA Frame & Gra to Is available for 4V I.D. risers and larger, spe4f atlon tolemr vm rrs srnn aza[M VATS a w�s Precast Audi- Vortex Device fCap and Riser) VA 14.1 034 - 6 'o ■��+(iil♦"I� . (OR EQUIVALE T 24 3 Q 48 a8 • 34 1.45 27 38 }/� 6t1 72 37 tl2 2.28 30 37 6[➢ 72 41 2.26 �6 44 6U 92 48 2,22 42 51 72 13(7* 55 3.96. 48 - 58 84 10t2 62 4.27 54 6fx tlg 84 1b4 70 tlz 4.2t} �Q 72 9Ei 114 76 5.48 66 8i3 yf2 ' 98 114 84 r12 5.'39 72 86 108 'l28 �a s.s� 78 ' 94 rf� 126 147 98'ltz $.87- 84 1aU 126 1$7 1f34 8 -9q 'i . / �//,)))J)Am11!1 ( - _ y �\ // /f // l // 1 /// ' # � � l / / / .--, \'\ - - ~ -- - -� -- - -- _ -� =� - -`_ __ M�_ -- ,/ /i �� ,, '� / / / / // / /, / ; �� °/ -- -- _ .� 'J I -- _ - 3�e- '� \ le I tj\ ll 1 \ _ _ = // r r / / _ _ ! --- �-.- TH � lull fll% �/ /// �/ /�� 1 f \ \ \\ \\ _ - _ x� _ _ •_- ��o _ ,� //,- �/r r, / ,r l % / , /Z '/ ,� r,' _ _ _ - _ I (I I - - - _ _ 1 // // /if i i l/ // / /�/ 1 { { \ . , _ -- ___-_ - _- - - __-._ -- -_. \ : , ,,� r / / / / f ! �' / / / �, Z /- .- I / , - _ _ � , \• l (( ((� //r��ll �illl,lllll�ll,��. ) l>1 \ `�:- �� %� /, / l / �' / - x,-10 / � � �� � \ • 1 t (i `' 1 1 1 1 1 -16 Job Number: 112054 Designed B AML f s O f � I Project Name: Glenmore Lots � Y' __.. •\ ', ��H 1 4 { AbxV =3,Ofps MaxV= S.Ojfps _ �`\ \I I I� \\ Il 141 I 111��O i : / / II I 1 -- - II�\�\ A \ \ \\ I- -_ -- ti Sta From Sta To T� (min) C Value Area (ac.) CA ecu E (in/hr) Q2 ' {cfs) Slope (fllft) Earth (n�).03) Jute Sod;} (n=0.05) Paved (n�.015) Ito (in/hr) Q* (efs) Depthto (ft) Min.Desi , Vol. Depth Vel. Depth Veb' Depth (Depth) (Type) 0+00 1 +00 8 0.45 1.11 0,50 4.9 2.45 OAlOQ 34fps 0.72 ft elev. 0.45 f t ,] --- T� - -] 6.00 3.00 0.78 ft 10" Earth 1 +00 2 +00 7.5 0.45 0.16 0,57 5.,2 2.97 0.0050 X.89fps 0.89 ft 3 >4$fps 0,59 ft 0,65 ft elev 306 6.30 3,60 0.95 ft -12" Earth 2 +00 3 +00 7.5 0.45 0.19 0.66 15.2 ,3.42 0.0262 1.89 fps 0.65 ft 248fps 0.83 ft ° Cover "- 6.30 4,14 ,0.89 ft l2" Jute 3 +00 4 +09 7.5 0.45 0.13 0.72 5.2 3.72 0.0365 X,74fps ' 287fps 0.80,ft 4 74% Inv 8, 30200 Q = CFS -" '_' 6.30 4.51 0,86 ft 12" Jute 4 +00 5 +00 ` 7.5 0.45 0.22 0.81 5,2 _4,24 0.1272 RWU-f HEADWATER COMPUTATIONS 4.74 fps 0.61 ft' OUTLET End 6,30 5.13 0.72 ft 10" Jute 5 +00 ' 6+00 9 0.45 0.85 1.20 4.7 5:63 0.0168 2.38 fps 1.09 tt HW1D 5.$0 • 6.94 1.18 A 16" Jute 6 +00 7 +00 8.5 0,45 0.39 1.37• 4.9 6.73 10-0242 18 0.5 2.85fps 1.09 ft 1.08 0.0 6.00 - 8.24 137 ft 16" Jute 7 +00 7 +80 8.5 0.45 0.50 1.60 4.9 7.83 0.006? 0.5 07 L83 fps 1.46 ft 0.65 25 6,00 9.59 1.58T 20" Jute .%, , /� ,,"I ,- � \o % ,,/ '''/ ! 1 / ��'/ - - / , l t } -11,--1,' I t . / r / / -- -- 'f/ /�i% / � Project Name: Glenmore Lots 1 -16 Job Number. 112054. Designed By: AML - -\-.. ,\ ` f /�/ /( DITCH #: 2 lvfaxS=5b% / \11, \ o ,� /i - ~ \\ \ / //j as MaKV-- 3.0fps MaxV= �.0)fps /l " / / �`\ ~` 1 f / ` \ \, �-1 \ � � .\ a Sta From Sta To " T. (min) C Value Area (ac.) CA ccu I2 (in/hr) Qz (cf's) Slope (ft /ft) Earth (n�.03) Jute(Sodl (n=0.05) Paved (n--O.OS Ito ' (in /hr) Qio (cis) Depthro '(ft) Mln.Desl n Vel. Depth : Vel. Depth Vela Depth (Depot) (Type) 0``-00 1 +00 7.5 0.45 0.25 0.11. 5.2 0.59 0.0075 X.47 fps 0.45 ft elev. 0.45 f t ,] --- T� - -] 6.30 0,71 0.48 ft. ` 6" Earth 1 +00 2 +00 8 0.45 0.26 0.23 ' 4.9 1 >12 0.0075 L72fps 0.57 ft 3 >4$fps 0,59 ft 0,65 ft elev 306 6.00 1.3$ 0.62 6 8" Earth 2 +00 3 +00, , 8 0,45 0.22 0.33 4,9, 1.61 0.0075 1.89 fps 0.65 ft Skew ° Cover "- 6.00 1.97 0.70 .0 10" Earth 3x-00 4 +00 7.5 0.45 0.19 0.41 5,2 2,1S 0.0050 X,74fps 0.79ft Inv. El. 304 5 So= 4 74% Inv 8, 30200 Q = CFS -" '_' 630 2.61 0.84fk 12" Earth �i / / / / Project Glenmore, Secton K213 Sta To Plan Sheet No Designer AML, PE Area (ac.) Sheet ' 1 of 4 Culvert #1 Qz " (cfs) Rev. Dale Date 11/15111 Jute Sodl n= 0 >05 Paved' n�Y.015 Ito (iia/hr) Qio (cf`s) Depthto (ft} Min>Des^ n` Vex STATION- HYDROLOGICAL DATA Depth Ver! AHW Contols (Depth} (Type) 0 +00 D A.= 140 ac I 10.5 0.60 100 yr Flood plan# elev 4.6 1.39 0.0960 0.1126 DesignAHWdepih elev. 0.45 f t ,] --- T� - -] 5.60 Stuclures etev teq. Tlrt9lty. Culvert #1: Cw - 0.50, TC -10.0 min., 12 - 4.2 h1hr,110 - 5.6 in/hr 9 0.50 - - 0.45 4.7 2.12 Shoulder 0.1378 _ 3 >4$fps 0,59 ft 0,65 ft elev 306 5,80 = -UT TI 10" Jute ,10" Jute 1 +75 CL elsv. 304 5 DISCHARGES USED RISKASSESSMENT 1 3.48 ! 4.6 10.84 0.0085 ADT Skew ° Cover "- Q 2 = 294 CFS Deburs Available Lengh 1.70 ft I 22" Jute Odd Gr. Elev Q 10 = 392 CFS Overbppin9 Stage _ Q = CFS Flood Plain Management Inv. El. 304 5 So= 4 74% Inv 8, 30200 Q = CFS -" '_' CrAerla and Sgmicant Irrpad Ong Gr Elev L= 6271 Ong Gr. Elev' Q = CFS CULVERT TYPE & SIZE Q QB Hw VELOCITY Try COMMENTS RWU-f HEADWATER COMPUTATIONS Ke CONT, OUTLET End HW/D INLET CONT. Ke OUTLET CONTROL, I (dc+D) 12 CULVERT TYPE & SIZE Q 01B HW. VELOCITY I Sm lh COMMENTS ELEV TWA HW1D I HW Ke do (dc+D) /2 ho Hi UST HW C.M. Smooth 6.391639 3.42 14 18 0.5 0.9 1.08 1.08 0.0 4.0 -20 1,4 1 1373 NiA (1373t/s) us naternsne on caicrete tiietCan6nikd (12)wJ dawrsteam t#asin. Veraraty to pp: Proposed IT RCP Culved(2 yr) 2.94 294 12 12 0.5 07 0.98 098 0.65 25 -0.9 l 12 I 888 NIA (a t31ys) Is noteri sine on concrete 8.fi3 863 1.8 =3,921.6 0 5 1.1 118 118 1.655 4 0 -12 1.8 1 14.86 NIA 11rilat (14 88Ns) is ratemsive on conixele. inletConl olled ( +1.S) wt davrr tw basin, Veb* m ppe Proposed 12' RCP Culvert(10 yr) 392 15 05 0,8 1.03 1.03 0.8 26 -0.7 15 956 N/A (9.6Ws) is notenusive on concra. , / / // /x X/ z 11.1 11 I I ----/ z / // SCOTT COLLINSZ / .,4 1 � % ''° �!f? ' 16 _- - ' -- ---- ,\ '`. \ ''r 0 r--i / / // / / / / /,.._" .� f' , // J \�\ / / ,, U No. 35`791 .It, I \ -_ ._ / 4 J / -- -- /// // // " ", - -,.., -// /1, -,,, z .-- \ \ 11, ,,- ,,-' , N/ \ l �� - - � - __ l � / r -- -- -= ,- ,-- I1 / � , \ I % , _ ww _ V /I / / / % - - / / � l \ I - ~` � 11\ ` o 1 / / � fir~ .\ `\ .\ \ \ \ _ ,. j } j �I /I �. , \ \,, � `�/ I � l \ �'"" � X z tau 46 x / / I \ r;0 h en % � I' to \ jr / r/ / \ \\ \ \ O L) U w '/"-, / �, 1 \,. \ to '- / i- --t 1 I ///M \ / / \ , `~'- Pnt�jeclt Name: Glenmore Lots 1 -16 Job Number. 1120545 Designed By: AML ; _- \, �,�, \ - � . -` DITCH #: 3 MaxS=•Mr /e I , "`� / Max V-30fps MaxV= S(Dff5 ,-_ _ \ - --- _ \ /- - �-• .- . �- Sta From Sta To T, (rain) C Value Area (ac.) CA t ccu D . (in/hr) Qz " (cfs) Slope (MI) Earth n-403 Jute Sodl n= 0 >05 Paved' n�Y.015 Ito (iia/hr) Qio (cf`s) Depthto (ft} Min>Des^ n` Vex Depth Vey Depth Ver! Depth (Depth} (Type) 0 +00 1 +00 10.5 0.60 0.47 0.28 4.6 1.39 0.0960 0.1126 ' 3..18 fps 0.45 f t ,] --- T� - -] 5.60 1.58 0.49 ft 6" Jute 1 +00 2 +00 9 0.50 0.34 0.45 4.7 2.12 0,0640 0.1378 r, ® -4 3 >4$fps 0,59 ft 0,65 ft Fit 5,80 2.62 -UT TI 10" Jute I fI It � � ----' "" �- I 7 ( 1 t %% A t I i t I t I I 1 ! t \ ` . j f - Project Name: Glenmore Lots 1 -16 Job Number. 112054 Designed By: AML DITCH #: 5 MaxS`= S,fPfo I �, � _� l _r/ , / maxV�Afps MaxV -5.0) I _s �� --- 3q :Z/ �� , /, - �, _ __ --- z Sta From Sta To T. (rein) C Value Area (ac.) CA cc . 12 (in/hr) Qz ' (cfs) Slope (ft/ft) Earth r1=7.03 Jut Sodl a=0.05 Paved n�3.015 Ito (b/hr) Qto (cfs) Depthto (ft) Min,Deai Vel. Depth Vel, Depth VeL Depth (Depth) (Type) 0+-00 1 +00- 8 0.45 0.31 0.14 4.9 0.68 0.1005 0.1126 ' 2.75 fps 0.35 ft I 9,62 ft I 1 6.00 0.84 1 0.38 ft 6" Jute i +00 1 +16 5 0.45 0.02 0,15 , 5.6 0.83 0.1005 0.1378 r, ® -4 2.89,%ps 038 ft 0,65 ft Fit 6.80 1.01 I 0>41 ft 6" Jute i 1 I 14 \., -- - _ _� 1 1,77-7,77-7 `• / % _, f I 1 ? ', "'- - -- --- ---- Project Name: Glenmore Lots 1 -16 Jab Number: 112054' Designed By: AML �` 1 Sze `__ --~ f DITCH #: 6 Max5 5.0•x° 1 -_- / Max V= 3.0fps MaxV= 5.Offps _ �-,-= t -- -� !-I- Sta From Sta • To To (min) C Value Area (ac.) CA ccu 1a {in /hr} Qz , {cfs) Slope (ft /ft} ' Earth (n=0.03) Jute(Sodl)(u Paved (n=0.015) Ito (irt/hr) Qio (cfs) Depthm {ft) MiaDesi n Yet.. Depth Vel. Depth Vol. . Depth {Depth) (Type) 0+00 •1 +00' 11 0.50 1.50 0.75 4.4 3.30 0.1126 ' i _ 4 2Sfps I 9,62 ft I 1 � F' 5.40 4+05 0.75 ft • 10" Jute 1 +00 1 +75 7 0.45 0.09 0.79 5.2 4.11 0.1378 r, ® -4 I 4 85 fps :1 0,65 ft Fit 1 6.30 4.98 0.70 ft ,10" Jute 1 +75 1 2 +50 1 10 0.45 1 3.48 i 2.36 4.6 10.84 0.0085 -- -- I'-- 2.17fps 1.58 ft Flood Blab Management Inv. El 302 5.60 113.20, 827% inv, El 298.00 1.70 ft I 22" Jute Project Glenmore, Sedon K28 Plan Sheet ND Designer AML, PE 0 3 � m Sheet 2 of 4 Culvert #2 Rev � at Dab 51115h 1 ___ -, ,:4 F STATION. HYDROLOGICAL DATA, I AHWContols - Q. �o L O DA= 3 55 ac 100 yr Flood plain elev U e U DesfgnAHWdeph elev z 66 c a 0 0 a E� Studtres elev. feq T4Vele v . Culvert#I2: Cw - 0.45, Tc -11.5 min., 12-4.0 in/hr, 110-5.4 in/hr 1,,,,,,,*1 � F' = f Shoulder 11 _ elev 304 5 C/) I = z� w 1r C r, ® -4 CL is 304 DISCHARGES USED RTSKASSESSMENT Fit O � -0 ADT Skew ° Cover z Q 2 = 639 CFS Detours Available Leng1h >"-:, Q 10 = 8 63 CFS Overbpping Slage -- -- I'-- Q = CFS Flood Blab Management Inv. El 302 So= 827% inv, El 298.00 Q = CFS Wareaand Sgn(cantlrnpad Odd Gr. Elev L 4836 Drfg Gr. Bev Q = CFS HEADWATER COMPUTATIONS CONT OUTLET ' INLET CONT. OUTLET CONTROL CULVERT TYPE & SIZE Q QB Hw VELOCITY Try COMMENTS RWU-f HW Ke ELEV I (dc-+D)12 ho HW/D HW Ke I do I (dc+D) 12 ho H L[.-S, HW C.M I Sm lh I 1 InletContokd ( +14') wl downsteam barn. Vekcdy m ppe Proposed 15" RCP Culvert (2 yr) 6.391639 3.42 14 18 0.5 0.9 1.08 1.08 0.0 4.0 -20 1,4 1 1373 NiA (1373t/s) us naternsne on caicrete Conlr t ( +18') w/ downsteam basin Veto* in p e Proposed 15" RCP Culvert (10 yr) 8.fi3 863 1.8 2 3 0 5 1.1 118 118 1.655 4 0 -12 1.8 1 14.86 NIA 11rilat (14 88Ns) is ratemsive on conixele. 1 U¢� --- -, \- sir -r/ ICI I �I E __� :�U --_, .\ I " Z ,,--, , � � / I Id" `, ,)/)) / 1\1 \ _ / 3 / "" < ca CL . ` r f \ ,\ ,-, u.1 w a \ , / / 9 ru ', '� / t i / ( 0 ,ac m UJI 1 ! / l l I �- H -�' - , \ i cef ,,-' I ,- � I / I I I I \, > U ce a- 1 I u� . .---� ! - \ a - +0a / ( I `� � � 4 - - d! � / / ,,- 1--- L I--- �* � \ /,� � % // / ,- r \ ( ' ` � �' � 1 � , ) DIT!�2� \ \ \ \ I L � I �� ' 1 �" / /,z - -- y / #` I I r 1 I I f \ / / ( \1 1 \ \ I I 1 ( I \ \ \ \ `\ / ! / - °f f \` ! f r' _ > I \ \ \ ¢ M rya ; o \ 1 \ - - __ / � ; /, /, --- -•' 7 / t f p / / '`'i -'' - --.. -'/ f I \ \ \ I I 1 /\ \ \ \\\ I / �/ I \ \ I / -- _ / �/ ii �� i I , \\ , I / ' \ -1 _ -- _ I / / 1 1 J ! / .� -;I / \ i III � � ` � f � /J l f I l \\ i I I l l l / / \ \ N1- - _ _- 1 �` \ - // '---, , / ,- 1 \�� .r' / ( l 1 1 I . 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" � 0 - _- - `\ �-_ jjj ` f ` \ '�� ;''- �/ �w --�-[ 1 y} t i 4 j ./�' /r ,r- -\ \ { ' \ \ Its; , a + l'. 7 // O I j 7 / - 1 r� / / \`� i � l�� .. • t !t � •y--- I.- / 1- ---- e A ,--�/ '� / / / \\ / \ ,�, ;�nII is r , \ .--' r / - f // �\ -1 -, � i \ ,Y DITCH #1 I I I '� � / /'/ / - , 1.-. t j E\ / I I \ .,. ,t C t f1, ' 1 I 6 _- -- f � / / / / ,, -- \\ , 1 1 1 I i i / ( ; Z ?";�, P/// a f 1 ° ..✓ ---- ,yon• ,� / / / ,f- /' �,- _ \ � \ � \ 1 } ;� .� .' a of l J I `- -- ; � -- f- \ \ \ 1. \ \ � // / // t 1 / S -- ' ,m W. //% !Jw / l 1 i / ` ,. -. /• Vii- ,� // / r ,- -• - --- _ , \ \ \ \ ICI i / f'r� "',y °1 � i ...s"'rt .� o .,,°o'• r'-/ t ( � ' / ,'"`•/' r-^`•. \\ \ l \ \ \ / (fr j)1 / / rl -f, ig .�. y 1 � ` ` -,rte -.' / t \ 1 ,7- k � -�-- 00, I "--, / / - \ \ I \ � I ) ) k`�,g I - - ( J 111 / .,,, Q j �, ,T. \ ,�-= /� / \ \ I Project Glenmore, Secion K2B Plan SheetNo Designer AML, PE 0 3 � m Sheet 3 of 4 Culvert #3' Rev Dab Dab 11115111 ___ -, ,:4 F STATION. HYDROLOiGICALDATA_ I aHW Cocttols - Q. �o L O D A= 177 ac. 900 yr Food plain ebv. U e U Design AHWdeplh elev z 66 c a 0 0 a E� Stuctrres elev teq. _ TVVabv_ Culvert#3: Cw - 0+45, Te - 9.5 min., 12 - 4.3 Mir, 110 - 5.7 inkir 1,,,,,,,*1 � F' - f Shoulder = elev. 342 C/) _ z� w 1r C r, ® -4 -elm 3415 IDlSCHARGESUSED RISKASSESSMENT Fit O � -0 ADT Skew ° Cover "• Q 2 = 3.42 CFS DebursAvaT'abie Lengih >"-:, Q 10 = 4 54 CFS Overbppiing Stage Q = CFS Road Plain Management inv, Ef 340 So= 4.32% Inv. B. 339.00 Q = CFS Crileria and Sgnifcant iripad Ong. Gr. Elev L 2315 Orlg. Gr. Elev Q CFS HEADWATER COMPUTATIONS CONT. OUTLET INLETCONT. OUTLET CONTROL CULVIERTTYPE &SIZE Q QB Hw. VELOCITY ea COMMENTS RWU-f HW Ke do I (dc-+D)12 ho H I LSD HW C.M. I Smoot` ELEV. 1 1 Jim Conlrow ( +12) wl doxrrsteam basin Vdmty in pipe Proposed l2'RCPCulved(2yr) 342 3.42 1.4 1,4 0.5 0.8 1,03 1.03 0.5 924 NiA (920s)ardenosiveoniximela InletCaitolled (+1.6) wl daxnsteam baste. Vdwfy in type Propased 12' RCP Culvett(10 yL464 4.54 lb 18 05 0,9 1.08 1.08 0.8 1.0 09 1.8 1 9.9 1 NIA (9 WVs) is noterrosive on ra v& 17-1 �.,.., Plan SheetNo D r 1 U 0 3 � m 0 3: Rev. Dal D c m m CL -W ,x Qx v °' ___ -, ,:4 F STATION. N -0 c 0 .Y I AHW Contols - Q. �o L O D,A= 0.2?8 aG 1 100 yr. Flood plain e wa- U e U aC I z 66 c a 0 0 a E� Stuclures� e 0 -r O 0° o� w r 1,,,,,,,*1 � F' 0 �� z � N f Shoulder = = z L C/) 1 it 1 W z� w 1r C r, ® -4 U) DISCHARGESUSED R V) z 0 Fit O � -0 w � W I _A >"-:, - 1 4 \, 1\ \1 -7f 7 V- / z / / / \ I -11z- \ k � I , / 6CUL.VERT #2 � ' _ - C \ ` \ \ `.'_` kc.i, -,t> ;, A'; „i �, r .;+ �.. "0� ` I \ \ / _. / ! 1 \ \ \ .ray 1 \ ` I j((( . + %ta ' . 4 j(J /1• j%� '-.S fi • (� \ ` / /`�' \ \ \ 155 / Iyt �` J /fjj�i�i =�i2'n <!. YYJ'V'.f., ti \ \� ;I`. � /r 1 ` \• \J -0•- s +., �(. ' i - ^i \ \, \ \ �jl�,,. .arm `-"' -.'.i• .�/ _ / \ ` \ \ \ ; d 6 , �_;1;'t•; A .- + 5��73Y ' t \ \ \ 1 / _ -- •--•-y \ , `\ ` \ •! H'�,Jj »2`,:` ',T }> .> - .e3,- \ \ \ f } � / \ ` � \ \• -_�,- - / \ \ \ \ , \, .r.✓ 1 1 * ; �, r/ ° =/' mil, t `\ \ \ \ `� -'� ` \ _ . _ ----- _ . , -- - J{ / \ % 1 llJ Y / t cr t' ` y' u ^ sl: ,r� --~ -• \ • ., @§ \ "� �� r 14 r \ / \ '� r' -- - / �/ / / \ ` \ \ \ \ \\ M � � I 1 i J! "r. E l(/ ti ✓ - -- - _ 8()--.- -/ . `\ 0 40r o / 16� \ \ \ 320 \, / , '(0; "�,", l / ! CULVERT #1 \ �-(JAI' ,-- _ �_ _ , \ \ \ ' - 11 \ \\;Z, \, \ .,` _ ~ -- / 18Q fit. \ \ \ --_ \ 11 ,),nA, , - 1, , t .. FLU `\ ,_. . - -_..^ -v- , \ \ r `rw ` ' e ;t - � I O / „� ,, -- -I" \ - ` -"-�✓ { f ! ,\1 \\ �\ \ �` ``Y' \ �z.. t f // I \ 'IM ..;C'l.TFI• +5. �'' ->`i.: O �-`"` `\ \ `` , ) jt( \ ` , \ , \ ,- ,- \. ,r l 1 Projedt Glenmore, Secilon KM P Plan SheetNo D Designer AML, PE S Sheet 4 of 4 Culvert #4! R Rev. Dal D Date 11115/11 _ ___ -, STATION. HYDROLOiGICAL DATA- A AHW Contols D,A= 0.2?8 aG 1 100 yr. Flood plain e elev. Design AHW depri e elev. Stuclures� e elev. t teq. TVlblev. Culved ft Cw-0,50, T TC - 8.5 min., 12-4.4 in/hr,110 - 5.9 in1hr Shoulder = = elev. 360 5 = = C-elev. -3605 DISCHARGESUSED R RISK ASSESSMENT L Eu \ 0 a0 a 6- N C F L � > o W U Z 0 O �T� U 0 w,�/ �(D 0 F-4 UJ 0 � E .J ,-. _ g4 N ti L U Q� I E -0 a C //���� �,t�,/ O U 0 v 0 (-%J a w -0 Q Ce u J 4r .c 1Ln 0 C v w 0aJOBNO. „ l a 102 054 m 11 009 -0 U C S SCALE 0 3 / 1'r =8Q' a S� i SHEET NO. iv e Water Quality Volume Requirements: PROPOSED EMERGENCY EXTENDED DETENTION BASIN #1 REQUIREMENTS: ,UTILIZE EXISTING BASIN t SPILLWAY CREST Minimum Forebay Volume= 0.25 inches per impervious square acre GRADING & CREATE MORE ELEVATION= 300.50 4 J / E,XIS77NG TOP OF DAM 1 POLU-HE VIA THE / i ELEV.= 302.00 Impervious Depth to range from 4'4!-6' ' / rvious Area= 53,894 sf + / PROPOSED CUT SLOPES. l 20 WIDE CONC. WEIR Q I OUTFACE CHANNEL. Minimum Forebay Volume= 1,123 cf I / UNDER NO C11WINSTANCE ( SHALL THE CO RACTOR ry / ! - -- Minimum Water Quality Volume= 0.5 inches per impervious square acre �� �i / _ Minimum Water Quality Volume= 2,246 cf ' CR'ATE FELL , ITHIN T E ,1 HANSON CONCRETE / \ 2x Minimum Water Quality Volume= 4,491 cf / BASIN OR FLOODPLAI I Q _ AN71- VORTEX Corresponding 298.68It « S�WMJACES SOPESS' T \ TRASHRACK Elevation to 2x WQV= 25 f 1 A23 ",SHALL IIATr - \ \ l 7 .80' t. , ART'IENS'URFAE. ` SIN. WA 1'E1 QUALITY / \ \ Extended Detention Basin #7 2%2. l ) \ -- \ \ OLTJM ' R AIRED Elevation Area of Volume Total Area of Volume 'r� Forebay Elevation (it) Basin W V 4 991' )FATE 7) , f 024 CL. III RC'P �fULTl STAGE ) ( (CO . ASH RACKS SHALL BE / Contours s Contours s �. ALITY VOLUME I _ ( fl X •` Q INSTALLED ,oN ALL_w RISER RIM ELFV - 300, DO w/ PROVIIJLD= 10;,6286 ORIFICES PER VSMH` „ \ FIVE 0 D- ES .f\ 6 hfI FLOiF ORIFIC ® 292 0 0 292 3 0 TECHNICAL BULLE77N #? a ELEV-=298.68 �c• ONE -Of' LOW -YLO#r 294 0 0 294 127 10 TpP OF D M '\ 100 +3ARREL �� �w =) I 1 =i x-1-1 =1 I ( =1 I 1 ` _ ORIFICE C� ELEV. =292.0 295 17 �.: - - - _ I- III -I I I =1 I I -I I \ y l.,..< AT L;EV. 30: 0 - 6 295 269 293 ' \ ORIFICE COEFF.- 0.6 296 103 60 296 544 ` � � 692 )0i' WIDE FLAT BENCH I T THE H 18 RCP 298 344 298 87 1 \ \ ' CL. Ui R 483 1,1 2,382 E E OF THE ErIfRAN"E ON ,,�`r� BARREL 300 712 1 517 300 2 057 CUSIDE OF THE -F' CILITY w/ 5,586 818.00 LF @ 1.1q 312 3.-1 SLOPES ON THE I WRIOR bF Q - - 302 3,015 2Q,G28 :- � PERFORATED PIPE. SEE 0 INV. oUr 27,9�8T ., ( 'rte v `� lN(V. IN= 290.00 c0 1=11- _: 2t'HE F CILIT'Y & .2 1 SLOPES i { \ � DETAIL ON SHEET 17. /NW. OUT= 289.00 Existing Facility Volumes coNC.xIS 1 REQUIRED \ ABOVE THE 'BENCH TYING INTO !� l- Total Area of EXIS?1NG GROUND. Elevation ii I -II.- \ %'" \ -- Basin Contours Volume (cf) \ �� 0TLYERT UNDEIi'NEATH RISER F0077NG (ft) C 1 j / / \ ` -I ,- v_, -1_ \' �C ,SS EARTHEN�ROAD 'TO RISE GENGY SMLLWA Y (sfl ,'1, ! I (-- �1�UT F,4LL DITCH INTO SAM �\ . , ,. 291 n/a n/a 20 LC'0 V \ `\ i III i FACILITY NO1 1'Q ,S ALA 292 n/a n/a I- I -11. �IN- FOREBAY \VOLUME \ 294 n/a n/a � SPILLA'rAY AT �` - 4 �t ! I 1 =� 100 YEAR v ELEV = 30.50 \ �� \ -- 1 ; RE 'P= 9, 1236. F &) EgAY W S E. =30(U.96' 296 4os 0 �` I I i. �OLUME �P�ROYIDED= 1, �?a f 10 YEAR, 298 873 1,246 W-S.E.=300.69' 300 1,471 3 564 302 2:163 � �`/ F I =Ill I I + \ \ � 2 YEAR � 7,176 PROPOSED VAhi~ -- _ NOTE- Proposed facdi volumes are greater WIDTH "SW.rt� W.S.E. 30C� 42 facility 9 \ _ \ MIN FOREBAY COAMIATO than existing facility volumes. Thus NO FILL FACILITY EASEMENT ,• \ \ - 1236• f �N. WATER QUALITY VOLUVE 0,�1� c Iilr RC _i �__ . POLlr�fE REQ D� >. MULTI. S2�4GL' RI,SS R IM \ / I I - - -`, - TOTAL FOREBAY VOLUbE �UIRED (2xiFQYf= 4,4116E IS PROPOSED WITHIN THE FLOODPLAIN \ \ ,� Q , - )PATER QUALITY VOLUVE HANSOI :ELEV. _Q��00 i i- \ PROVIDED- 1, 5176E - PROVIDED= >o,B28cf CONCRE77E EXISTING TOP OF DAM BASIN TOP OF DAM Routing Method: storage- indication Basin Input Data 2 -Year, SCS 24 -hour Storm 7 Contour Areas inflow (cfs) 10.202 at az.95 (hrs) Elevation(ft) Area(sf) Computed Vol_(cy) discharge (cfs) g_o79 at iz.oi (hrs) 292.00 3.00 0.0 water level (ft) 300-421 at 12.01 (hrs) 294.00 127.00 3.7 storage (Cy) 240.374 295.00 269,00 10.9 volume (cy) 319S.94o 296.00 544.00 25.6 10 -Year, SCS 24 -hour Storm 298.00 2287.00 88.2 inflow (cfs) 2o.000 at 11.95 (hrs) 300.00 2057.00 206.9 discharge (cfs) 39.654 at 11.95 (hrs) 302.00 3016.00 393,6 water level (ft) 30o.691 at =95 (hrs) rainfall, P (in) 5.600 storage (cy) 263.475 Start- Elevation(ft) 292.00 VOL(cy) 0.00 loo -Year, SCS 24 -hour Storm 5 Outlet Structures inflow (cfs) 39,836 at 11.95 (hrs) Outlet structure o Outlet structure 3 discharge (cfs) 39.408 at =95 (hrs) Orifice Culvert water level (ft) 3oo.963at 11.95 (hrs) name: 3ohr Drawdown Orifice name: Barrel storage (cy) 287.796 area (sf) o.005o multiple 1 diameter or depth (in) 5.000 diameter or depth (in) l000 discharge outof riser Type 2 width for red. (in) o.000 D (in) 18.000 name: Anti Vortex coefficient 0.600 h {in) 0.000 rainfall, P (in) 5.600 invert (ft) 292.000 Length (ft) 88.000 peaktime(hrs) =938 multiple 1 Slope 0.011 time of conc. (hrs) o.1600 discharge u Mannin ' g out of riser Manning 's n 0.013 multiple 4 Inlet coeff. Ke 0.500 time increment (hrs) o.o23o Outlet structure 1 Equation constant set 3 file: twentyfourtxt Orifice Invert (ft) 289.000 time limit (hrs) 3o.000 name: Mid -Flow Orifices SCS area (sf) o.196 Outlet structure 4 fudge factor 3.00 diameter or depth (in) 6.000 Curve name: Anti width for rect. (in) 0.010 Vortex routed true coefficient 0.600 multiple 1 invert (ft) 298.68o Invert (ft) 300.000 peak flow (cfs) 20.053 multiple 5 discharge intonser z discharge into riser file: twentyfourtxt peak time (hrs) 11.938 Outlet structure 2 O Weir volume (cy) 2344 -531 name: Proposed Spillway 1 length (ft) 20.000 multiple 1 side angle 45.000 ce coefficient 3.300 Hydrograph 2 invert (ft) 300.500 Ch multiple 1 scs discharge through dam 10' )FIDE FLAT BENCH AT THE ELCE OF co THE EMBAAWNENT ON CUT SIDE OF THE FACILITY w/ 3-•1 SLOPES ON THE INTERIOR TOP OF FOREBA Y DAM OF THE FACILITY & 2.1 SLOPES ABOVE TH- 1 ' THE BENCH TYING INTD EXISTING GROUND FIVE- -09i l FLO -- Q UPSTREAhI ANT7- VORTEX ELEV.= 302.00 100 YEAR MALI - • 0 A T AN ORIFICES ® ELEV. =298- S8 - -_ - E A 1 ' ' WIDE FOREBA Y TOP OF TRASHRACIK WIDTH= 77 10 A T AN , ELEVA 77ON= 300.00 � .III _ 20' WIDE CONC. WEIR ELEVA 770N= 302 00 W.S E. = 300.96 2 -YEAR STORM EVENT -& ONE -01 LOAF -FLOiY =1 1 =1�- BUFFER DAM ELEV. = 300.00 10 YEAR DOES NOT CREST 7NE OU7FALL CHANNEL. r- W ORIFICE @ FEV. = 9 W � W O W I til I (=1 I I- W W o `�� " ' MAX. EMBANKMEN T W. S E. = 300.69' EMERGENCY SPILL WA Y W -- -�- \ _ l I , . HT. = 6' (302-296) 2 YEAR 100 YEAR W-S.E= 300.42' W.SE. =30 ' 11_ 0.96 7 1' FDREBAY TOP OF ► - ... - }� \ , } -- -� h Eir 300. EVERT ` ° NDERNEATH ........ 10 OF - -- -- -- - -- -- -- - - - - -- -- 10 YEAR DAM' EL ® PDNDING \ �,� - - - -- - -- +� EAR�HEN 'IIOAD TO ....... - - - - _ -_ -- -- - -- - -- - - ^�' W. S. E. = 300.69' DEPTH--------- -- - - - - -- -------- - - - - -- - -- -- - -- ------ - - - - -- FOREBAY & ' WID FOREBAY SPILLWAY /� -lam ALL ROAPS'IDE {,a} \ g 5 .... BOTTOM OF s. >�a ORIFICE GOE,FF.= 0.6 :, :,. ~` 6 _.. P o o� c, (? S#jV FACLLITY..: �. -., FOREBA Y ° SHALL BE CONSTRUCTED � F GABION ..... _ BASKETS WITH VDOT #3 COARSE ELEV, 295. D 4' AGGREGATEON THE UPHIL SIDE OF THE WEIR & SS I RIPRAP ON THE DOWNHILL �°} s FOREBAY & 5' WIDE FOREBAY SPtt LwaY \ Lt/ - -_ SIDE OF THE WEiR. GEOTE ILE FILTE SHALL BE coNST}zucrED oFGABION MIN. 8' WIDE ®TOP & (�/ BASKETS WITH VDOT#3 COARSE BOTT•CM of DE7DVVTTO CL.' II► RCP 4' DE V BASiN's BARREL SHALL r 5' WEIR 00EFF. = 3.3 RICtFRtDERLhA l Q I EP IMPER IOUS AGGREGATE ON THE UPHILL SIDE OFTHE ' BASIN= 292.00 - MUL T- -STAGE RISER. CORE & CUTOFF OUTFALL INTO PROPOSED co INSTALLED. WEIR SHALL h1?iVE S DE 0 WEIR &CLASS 1 RIPRAP ON THE DOWNHILL SEE THiS SHEET FOR 118" CL. III RCP TRENCH WiTH 1:1 SIDE LEVEL SPREADER C� C� �7 / � `SIDE OFTHE IR E TEXTILE F LTER IMMEDIATELY UPSTREAM SLOPES w/ A CREST ELEV. =zg .0 5 (W)x9 (L) Q p o wE ° I DETAILS BARREL SLOPES SEE DETAIL ON FOREBAY SPILLWAY SPILLWAY ELEVA770N= FABRIC UNDERLAYMENTSHALLBE NEXT SHEET FOR S FLOOD PLAIN AREA. ELEVATION= 296.00 INSTALLED. WEIR SHALL HAVE = SIDE �`8 LF @ 1.1% , ADD177ONAL INFORMATION. SEE ESC PLANS AND 300.50' t LOPES w/ A CREST ELEV. 2g6.o' 5'(W)x9'(Q IN'V. IN= 290. DO SHEET 15 FOR - - INV.'.' OUT = 289.00' ADDi77ONAL INFORMATION. I Inflow Hydroqraphs 3 Inflow Hydrographs T 0 Hydrograph o SCS name: 2 -Year, SCS 24 -hour Storm Area (acres) 5.44o SCOTT .R. COLLINSZ CN Type 2�o U No. 35791 rainfall, P (in) 3.700 „d ( time of conc. (hrs) o.16o0 time increment (hrs) 0.0210 ff timelimit(hrs) 3o.000 �SSIONAL'�OZ fudge factor 1.00 routed true peak flow (cfs) 10.229 discharge outof riser Hydrograph) width for red. i n 0.000 O Din 38.0 O 00 SCS coefficient 0.600 peak time (hrs) =938 name:3 -Year, o SC52 -hours Orin 4 t v invert ft .o O 334 00 Len h 9t (ft) 55.000 volume (cy) 319S.94o multiple 1 Slope o.g10 CN 79.400 Hydrograph 1 Mannin s n 0.01 Type z 1 SCS rainfall, P (in) 5.600 Outlet structure cture 3 Equation constant a set q 3 name: to -Year, SCS 24 -hour Storm Orifice Invert (ft) 315.000 time increment h (hrs) 0.0200 Area (acres) 5.440 time limit hrs (hrs) 3 0.000 area (sf) 0.136 CN 77.800 fudge factor 3 g .00 diameter or depth (in) 5.000 Curve Type 2 width for red. (in) 0.000 name: Anti Vortex peak flow (cfs) 35.379 rainfall, P (in) 5.600 multiple 1 peaktime(hrs) =938 invert (ft) 336.75o time of conc. (hrs) o.1600 volume (cy) 1798.o75 multiple 4 discharge into riser time increment (hrs) o.o23o discharge into riser file: twentyfourtxt Hydrograph 2 time limit (hrs) 3o.000 SCS Outlet structure 2 fudge factor 3.00 name: loo -Year, S - -hour CS z hour Storrs , 24 routed true name: Emergency Spillway CN 79.400 peak flow (cfs) 20.053 z side angle 78.690 peak time (hrs) 11.938 rainfall P in .3 ( ) 9 00 O volume (cy) 2344 -531 invert (ft) 339.700 1 time increment (hrs) 0.0200 multiple 1 ce F- Hydrograph 2 fudge factor 1.00 Ch g scs UJI co name: %oo -Year, SCS 24 -hour Storm � N Area (acres) 5.44o z 0 Q CN 77.800 j Type 2 rainfall, P (in) g.1oo u H time of cone. (hrs) o.1600 time increment (hrs) , 0.0210 time limit (hrs) 30.000 fudge factor 1.00 routed true peak flow (cfs) 39.940 Uj peak time (hrs) 11.938 volume (cy) 4669.797 W EXIS77NG TOP OF DAM WID TH= 10' AT AN ELEVA 77ON= J02.00' 1.04' OF FREEBOARD � DURING THE 100 -YR STORM EVEN WEIR COEFF. = 3.3 CONC. LINED SPILLWAY a,VV'IVI FACILITY #1 DE'TEIVTION HASLAT #1 F©REBAYSFILLWAY EMERGENCYSPILLWAY SCME 1 " -20' NTS - NiNTS NTS 20 EMERGENCY GRAS,' SPILLWAY / " I . If B NCH AT T E EDGE OF / o l! _ / Routing Method: storage - indication Basin Input Data Inflow Hydro ra hs fY'IR u! 5.•> SIDE SLOPES 7 / l�Ii Ti' NlfhfNT ON BUT sI E OF Water Quality Volume Requirements: -- _ y q / ELE1T = 339.70 1 / .- ` C / Ty 3 1 PEA YO, TIDE SPILLWAY CREST EXTENDED DETENTION BASIN #2 REQUIREMENTS: 2 -Year, SCS z4- hourStorm 5 Contour Areas Inflow H dro s � _J 3 Y VID EBAY PiLLWAY ! =11 - 1_111- ' E DR OF 2- FA ILITY 2.1 ELEVA 339.70 TOP OF U.•,M _ Minimum Forebay Volume= 0.25 inches per impervious square acre inflow (cfs) 8.007 at =94 (hrs) Elevation(ft) Area(sf) ComputedVol.(cy) H dr ho FORE Y &� b F FOR �� / � - 1 1 �' � � / p � q discharge cfs Y P SHALL< CONSTRUCTED OF'GA810N , _ , 1=111 =yi11 ,, L OYE TH BE T NG/f1VTO ELEV = 341.x00 Forebay Depth to range from 4'-& g (cfs) 0.347 at 13.18(hrs) - 334.00 4337 -00 0.0 SCS i ! 0 / / i=l ill -I 1-� , = water level (ft) 336.91g at 23.16 (hrs) 336.00 7140.00 420.8 e: 2 -Year, SCS 24 -hour Storm BASKE V;. tTt� /DOT #3 COARSE -i f-i 11 =1 -I TI GRDU SON CONCRETE Impervious Area 49,713 sf storage (cy) 6$3•$93 33$_00 9855.00 1047 -5 Ar / / 20 W/DE GRASS Minimum Forebay Volume= 1 036 cf 340.00 12S78.00 3876.3 ea (acres) 3.980 AGGREGATE THE UPHILL SIDJrOF THE / I, 1 -1) I 1 I� N I1 I ( -_ / / -N _! �' TI- VORTEX WEIR OU7TFA CN 79 400 AWEiR & CLASS I R AP ON - E DOWNHLL / % +11-) I 1 =) 1 .i 1 I 11 I= , LL Minimum Water Quality Volume= 0.5 inches r im Nous square acre 2o Year, SCS z4 -hour storm 341.00 13739.00 2363.5 Type 2 5 1IF - f / RACK tY per Pe q YP \ _ - -__ - - -� B Y OTTDM. - - CHANNEL W/ 5.• 1 = inflow (cfs) 35.372 at 11.94 (hrs) > rainfall P (in) 00 SIDE OFrTHE WEIR. E - EXTILE FILTE�rj ` _111 1(1 =, ! i I- I _ T Minimum Water Quality Volume 2,071 cf Sta 1 7 - / D E INED discharge cfs 1.88 at 12.2 (hrs) rt E evation(ft} 334.00 Vol Vol_(cy) o0 - -FN�MGUNDER SLIALLB % 1I III -1II lI( =111- / SIDE 5LCFES 2x Mini = 9 (cfs) 4 4 time increment (hrs) 0.020 r � �.- - i , � , / - mum Water Quality Volume- 4,143 cf water level (ft) 338.165 at 11.14 (hrs) time increment hrs 0.0200 .i i 1 =11 i�I I H 11- 0 6cf. l ti _ t) /INSTALLED. WE� SHA HAVE,j.?'SID _ - I_ Elevation Corresponding to 2x WQV- 334.73 ft storage (cy) 31o8.525 time limit hrs 0.000 SLOPES w A C EST ELEV.= o' x _ -1 i I (I -Ill l I ` E (hrs) 3 / 3 /S (� -1 {� o- Year, fudge factor 3.00 100 Year, SCS 24 hour Storm Outlet Structu v_ S routed true _ / Extended Detention ntlOn BaSln #� inflow cfs oal2at 11- hrs Outlet VA WIDTH SWa� AC S / I, I I , of { ) 3 94 (hrs) ure o Outlet structure 3 peak flow (cfs) 8.o11 - discharge cfs 411 i , I .7zs at 7.2.10 hrs n . � Area of 9 (cfs) 14 (hrs) O fice Culvert Total Area of peak hrs 22. 8 ESM7: `SLOPES ALL ; , / P (hrs) 93 Elevation / n Volume ., me water level ft �. oat 11.10 rs m _ - , . � _ na e. ohr D t) 3 9 (h) rawdown orifice TA 3 75 3 name. Barrel volume 6.61 / _. `� _, 024 CL: III RCP �tllLTl S Forebay Elevation ft Basin (cy) 93 9 BE <109 ' AND SHALL HA if t _ -� / Y O . 111, I � iX � 7RASH :RACKS' SHALE. BE ft storage 1 61. _, � . = / O (Cfl (Ct) 9 (cy) i7 ft. area {sf) 0.032 multiple 1 / - r \ RISER 'RPM ELEV. 339.00 cu/ P -I ! I I h / Contours s RTH R SCE INSTALLED ON 'ALL ours s AN :E E SUF J � � ( (fl � (fl 1 7 = \ FOU 0 D -FLOW ORIFICES '' � FOUR -05' ,ill it 111 H R VSM ORIFICES PER / r U7 H ELEP. 336. P'S �• ''ONE 81x/ i TECHNICAL BULLETIN l #� DPO.�'D M< _ _ , T 1 rA - -. 1 I 1,1 � L CE ®E Eli 3 � LOW FLDW ORIFICE 334.0 30 � _ ", 1 076 0 334 4337 0 I P _ V - - II III i 1 L'LE 4100 336 7 _ 2 30 r J 336 7 141 4 r L a 3 7 11,361 - - 'ORIFICE E COEFF. 0.6 1 III�II -U . T ' r / '' l 338 3 66 � l 338 9 8.75 9 073 / _ _ 28,283 I 1 _ _ { � 18 CL '1 /l RiyP �nT STD. / - II � 341 341 12 78 5 L 5066 1 CL. 1 `` BARREL EC .. FI7R B fi � D , , I I�� o - - 341 - - 341 7 , ®9 13 39 55 LF .1,9 - o 8 J' IS TYPE � - .�1M E . 3 0 a T , Y i r' PERFORATED' PIPE." SEE - lT(11 -I E INV. IN ..330.:00 RIF RA P _ r' \ _ �I 11 / , 'DETAIL ON 'SHEET 17. _ / `lNl! OUT 32 55.00 s _ ROPO E P k Wz 44.5 i 1 11.-l� E/4CILIT ° . 11=111 RISER E E F O onvc COINCDSWT - / % iIIIIII � z R P SPI LLWAY I l .a j - 1 f - - NOT T� SCALE a )! ` �1�11I ► r 100 YEAR? 1 E .dfl�V iY T R A I VDOT , TD. A =33 / 8 � W.S.E. 9.75 II I Y YLU ER I EW 1 - d 10 YEAR 2x)r V 4 43 . rho {j , 'l f - _ / J dllN. FORIsBAY COdIBINED -- - - - / { , 1111 l _ W.S.E. 3338.17 - 1 QtT L T O . roLll�lE' RE D- > 0366 . 111 -I1 Q f r - TOTAL FO.REBAY VOLUME _ 2 YEAR / .f i I l ;r PROirIDE11! 9 0736 .f W.S E 3336.92 - r' 10' ,WIDE TOP OF DAM .Ili 111 oLU` E dflN. WATER UALITY Y .a! CL` 18" _ _ 11 i ", � j ' � REQUIRED (,2zWQV }- 4,143cf. ELEV. - 341.00 / � = 7 t 1 lI 11� BASIN TOP OF DAM III RCP _ - WATER IIALITY voLrl�irE - - Q t , L -I I i / I 1 :PROVIDED 63 8156 INl - RRL'L o D7H 10 AT AN ' .IBA - , _ !g[.1 r ti f H G7 I c ' � WEIR ELEV 339.70 = fi ELEVATION J41.00 -. . � r ?i CREITF III � D t U STRE 4111=1 1-- _ - 20 WIDE GRASS .WEIR �_: VORTEX \ i l-- ___ / , II II E TATI E TOP P 2 : WIDE FOR \ R - _ TRASH ASK OUTFACE ' CHANNEL W TOP OF FOREBA HANNE RE Y DAM � iII I1- FFE `� L I _ CP \ _ . - 338.00 - OF DAM ELEV III >/ 5. 1- SIDE SLOPES. S _ 11 I WIDTH N 2 AT A LT T - � ER RI MA X ELEVA 770N= 338.00 EMBANKM NT E i - - - HT. 13 441 328 336.75 g - - 1T I ,= 2 . � � r / _S , _ e l A PQND ING .1 ELEV. - - r - - - - -- --------- ------------ - 4.O FOREBA r DEPTH 011 _ I- Wt�E EBAY SPILLWAY Y ELE! ORIFICE - 0.6 FOREBA,Y ALL BE RUCTED OF GABON 7 , --- - - - -- -- 1 BASKE H VDOT #3 COARSE \ ,. 4, N AGGR GATE ON UPHILL SIDE OF THE \ WNR CLASS i RIPRA N THE DOWNHtLt\ BOTTOM OF DETEN77o - - - ! 'SIDE FTHEWEIR.GE XTILEFILTER FoREBAY &5 wIDEFOREBAYS- LWAY "BASIN= 334.00 MIN. 8' WIDE @TOP & 11 =11 I i r- _ 3 I`D AY OTT" pp \ CL. 11x1 RCP = =1 =111 FABRIC SHALL BE HALL BE GABIaN - 4' DEEP IMPERVIOUS / (�i 111 -- - r 'F $AY CDM BASKETS WITH VDOT COARSE MUL T STAGE RISER. _ llaI1 -i�,_ �. \�L�1f1 - INSTALLED. WEIR ` E1.1S1DE AGGREGATE ON THE ILLSIDEOFTHE SEE THIS 'SHEET FOR 18 CL. 111 RCP CORE 8t CUTOFF VO E REQ�D /1, 03 f BARREL FOR, ' \ SLOPES w/ A CREST ELEV. =334.0 '(W)xarr'(L) WEIR & CLASS I RIP ON THE DOWNHILL DETAILS EL TRENCH WITH 1:1 SIDE Ill_) 1 _ _ t►Ii_ AL A TTOLU SIDE OFTHE GEOTEXTILE FILTER 55 LF @ 9.1% SLOPES. SEE DETAIL ON FOREBAYSPILLWAY- - 111 - 111 -111! - �y \ I� _ - -'' PROYI E.D= 9, \073Cf FABRIC ERLAYMENTSHALLBE u � ` i. , , f =III, ilk l l - i t � , ._ , � � INV. IN= 330.00. NEXT SHEET FOR ELEVA 770N= 334.00 INSTA WEIR CREST ELEV.= 334.00' , i -i i I hI-I ; ll I 1 =11 =111: �_, , ,- \ INV OUT -- 325. DO ADDITIONAL INFORMATION. -' CULP RTf£TNDE TH / - .r I ' - � � . � 111+ _� 1 �I I I���1I 1=1 1=1 �1_(I i diameter or depth ' p (in) 1.500 discharge outof riser Hydrograph) width for red. i n 0.000 O Din 38.0 O 00 SCS coefficient 0.600 h in o.o ( ) oo name:3 -Year, o SC52 -hours Orin 4 t v invert ft .o O 334 00 Len h 9t (ft) 55.000 Area acres . 80 (acres) 3 9 multiple 1 Slope o.g10 CN 79.400 discharge out of riser g Mannin s n 0.01 Type z 1 Inlet coeff. Ke 0.500 rainfall, P (in) 5.600 Outlet structure cture 3 Equation constant a set q 3 time of conc_ hrs 0.3600 Orifice Invert (ft) 315.000 time increment h (hrs) 0.0200 • i - name. M d Ftow Orifices time limit hrs (hrs) 3 0.000 area (sf) 0.136 Outlet structure tst cture 4 fudge factor 3 g .00 diameter or depth (in) 5.000 Curve routed true width for red. (in) 0.000 name: Anti Vortex peak flow (cfs) 35.379 coefficient o.600 multiple 1 peaktime(hrs) =938 invert (ft) 336.75o Invert (ft) 339•000 volume (cy) 1798.o75 multiple 4 discharge into riser 1-4 14 discharge into riser file: twentyfourtxt Hydrograph 2 SCS Outlet structure 2 name: loo -Year, S - -hour CS z hour Storrs , 24 Area (acres) 3.980 name: Emergency Spillway CN 79.400 length (ft) 20.000 Type 2 side angle 78.690 rainfall P in .3 ( ) 9 00 coefficient 3.300 time of conc. (hrs) o_1600 invert (ft) 339.700 time increment (hrs) 0.0200 multiple 1 time limit (hrs) 30.000 discharge through dam fudge factor 1.00 routed true peak flow cfs o.1z P (cfs) 3 5 100 YEAR W.S.E. =339. 5 7 10 YEAR WIDE FLAT BENCH AT THE EIJOE OF TH NBAN IIdfENT DN CUT SIDE OF 1'HL' FACI 3.1 SLOPES ON THE INTERIOR OF THE LIT Y elf' 2.•1 SLOPES ABOY E peak time (hrs) 1193B volume (cy) 3512.131 W S E.= 338.17 THE BENCH INTO EXISTINC GROUND 2 & 1D -YEAR STORM 2 YEAR EVENTS DO NOT CREST THE W S E. = 336.92' EMERGENCY SPILLWAY - -- '! 100 YEA TOP OF DAM WIDTH= 10' AT AN 1 W. S E. =339. 75 ' ELEVATION= 341.00 T \ti J- 5'' WEIR COEFF. = 3.3 EMERGENCY SPILL WA Y ELEVA 770N= 339.70 C ss EARTHEN, D� `t I �l l if =1T1` 1 111::�;111111111i 11� ll l till, 'i i �_ SVU'M FACILITY #2 P r' TO OUTFALL `DITCH I _, « -„ - I EXTENDED DETENTIDN BASIN S f3REBAYSP,�LLLWAYs , SOW FACILITY I► I =l \ ,SC :1 =20' I NTS NTS -r 1.25' OF FREEBOARD � DURING THE ? 100 - ?R STORM EVEN WEIR GRASS LINED SPILLWAY FMERGEIVCYSPILLWAY NTS :N 3.3 z W � N 0 z zLU 2: 0 ° i ui U oc 4 ce w w CD °- < uni f3c N w CL D � w m U t- 0 Ce 0 W a n w 0 Z z Q Q n W D d <t C6 Ce ul 0 d W Ce CL U') w W 0 w 0 z X W 01 L9m N m M - CL z r O H N Ll.t !- ` c;,, � z � N 23 Lj La CSI 3 z o� '� ._.1 z Q �z U - ° K W ? 06 - U- ,F r /� 0 V l ... c v F'{ J ° Q U) ~ V Q W F- L� w W To 0 3 I s 3 N i I 0) U >� z W 0- - f� a :3 L 0 0 � cat W U 0 -0 0 0, i C z E Cn c I U1 W P4 z Q o U � � I L F_4 ILi W = 1� o W z" U F- z L z ° t W Q -a .. z ° J � oC: W 57 W W O U ^ 0 V 0 O_ U V1 0 o U) a •y U h '° -0 V X LU L U o° .� n O lJ U O O :3 N _ CL N 000 JOB NO. (n CD CD 102054 ° to 0 a : SCALE o 3 AS SHOWN V) 0 CL l SHEET NO. o a 16 �a Lu N at .\t 1-4 14 01 L9m N m M - CL z r O H N Ll.t !- ` c;,, � z � N 23 Lj La CSI 3 z o� '� ._.1 z Q �z U - ° K W ? 06 - U- ,F r /� 0 V l ... c v F'{ J ° Q U) ~ V Q W F- L� w W To 0 3 I s 3 N i I 0) U >� z W 0- - f� a :3 L 0 0 � cat W U 0 -0 0 0, i C z E Cn c I U1 W P4 z Q o U � � I L F_4 ILi W = 1� o W z" U F- z L z ° t W Q -a .. z ° J � oC: W 57 W W O U ^ 0 V 0 O_ U V1 0 o U) a •y U h '° -0 V X LU L U o° .� n O lJ U O O :3 N _ CL N 000 JOB NO. (n CD CD 102054 ° to 0 a : SCALE o 3 AS SHOWN V) 0 CL l SHEET NO. o a 16 �a