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WPO201700037 Plan - VSMP 2020-03-20
CINITY MAP: �l64�`,10: � wa ff,119Ni1*1i OWNERS: TMP 04600-oo-oo-o19133 CROCKETT CORPORATION 435 PARK STREET CHARLOTTESVILLE, VA 22901 DEVELOPER: RIVERBEND DEVELOPMENT, INC. 455 SECOND STREET SE, SUITE 400 CHARLOTTESVILLE, VA 22g03 ENGINEER: COLLINS ENGINEERING Zoo GARRETT ST, SUITE K CHARLOTTESVILLE, VA 22902 TAX MAP: 04600-oo-oo-oi9B3 D.B. 5oii, PG. 170 39.98 ACRES ZONING: NEIGHBORHOOD MODEL DEVELOPMENT DISTRICT (ZMA2oi8000si WITH PROFFERS - APPROVED BY THE BOARD OF SUPERVISORS ON JULY 17,2019) - THE CODE OF DEVELOPMENT AND APPLICATION PLAN FROM ZMA20-500007 ARE STILL VALID AND STILL APPLY TO THE BROOKHILL PROJECT. ENTRANCE CORRIDOR OVERLAY (EC), AIRPORT IMPACT OVERLAY (AIA), MANAGED AND PRESERVED SLOPES OVERLAY DISTRICT, AND FH-FLOOD HAZARD OVERLAY ZONING DISTRICT NOTE: A SPECIAL USE PERMIT APPLICATION (SP20i5-00025) WAS APPROVED TO ALLOW THE GRADING ACTIVITIES IN THE FLOOD HAZARD OVERLAY DISTRICT (FH). THE SP WAS APPROVED ON NOVEMBER 9, 2oi6 BY THE BOS WITH CONDITIONS. TOTAL PROJECT AREA: TOWN CENTER - 39.98 AC PROPOSED USE: MASS GRADING FOR FUTURE TOWN CENTER BLOCK CLASSIFICATION: VILLAGE CENTER: NEIGHBORHOOD SERVICE CENTER AND URBAN DENSITY ALLOWABLE DENSITY: 53. UNITS (MINIMUM) To 154 UNITS (MAXIMUM) - z DUA TO 6 DUA FOR THE PARCEL BASED ON 25.8 AC WATERSHED: THE PROPERTY IS LOCATED WITHIN THE NON -WATER SUPPLY WATERSHED AREA OF THE SOUTH FORK RIVANNA RIVER AGRICULTURAL/FORESTAL DISTRICT: NONE TOPOGRAPHY & SURVEY: TOPOGRAPHY WAS COMPILED FROM SURVEY BY LINCOLN SURVEYING AND BELL LAND SURVEYS, JANUARY 20-5. BOUNDARY INFORMATION WAS COMPILED BY LINCOLN SURVEYING ON MARCH 7, 2015. FIELD VERIFIED BY COLLINS ENGINEERING, MAY zo-A. DATUM: NAVD -988 EXISTING VEGETATION: THE PRE -CONSTRUCTION GROUNDCOVER WAS A MIXTURE OF GRASS AND WOODS. CURRENTLY THE AREA IS AN ACTIVE CONSTRUCTION SITE AND THE LANDCOVER IS NOW A MIXTURE OF GRASS, WOODS AND EXPOSED EARTH. ARCHER AVENUE, THE ICE RINK SITE AND APPROVED WET POND 4 HAVE BEEN CLEARED & ARE CURRENTLY UNDER CONSTRUCTION. BURIAL SITES: NO CEMETERIES WERE FOUND DURING FIELD INVESTIGATION OF THIS SECTION OF THE DEVELOPMENT. PRESERVED/MANAGED SLOPES: PRESERVED SLOPES AND MANAGED SLOPES ARE SHOWN WITHIN THE LIMITS OF THE PROPERTY. SEE EXISTING CONDITIONS PLAN SHEET AND GRADING & DRAINAGE SHEETS. FLOODPLAIN: THERE IS A too-YR FLOODPLAIN LOCATED IN THE BROOKHILL DEVELOPMENT PER FEMA MAP ID 51003Co28oD, DATED FEBRUARY 4, 2005. IN ADDITION, A DAM BREACH INUNDATION ZONE EXISTS IN THE BROOKHILL DEVELOPMENT FOR THE SOUTH RIVANNA DAM, WHICH IS A FEDERAL DAM LOCATED UPSTREAM OF THE PROPERTY. THE APPROVED FDP PERMIT # IS 2o1600004. RETAINING WALLS: NO RETAINING WALLS ARE PROPOSED WITH THIS PLAN. THE FINAL SITE PLAN FOR THE FUTURE TOWN CENTER, WHICH IS SEPARATE FROM THIS PLAN, WILL INCLUDE RETAINING WALLS. UTILITIES: NO UTILITIES ARE PROPOSED WITH THIS PLAN. THE FUTURE TOWN CENTER, REVIEWED UNDER A SEPARATE PLAN, WILL RECEIVE ALBEMARLE COUNTY WATER AND SEWER BROOKHILL SECTION 1 MASS GRADING VSMP PLAN AMENDMENT #2 (WP0201700037) RIVANNA MAGISTERIAL DISTRICT ALBEMARLE COUNTY. VIRGINIA VA — / �� �� ��\�\\��A \ / b THIS PLAN PO SES AN ADDITIONAL 8.90 ac. ,/ o �' \ OF DISTURBANCE lk 000`0V. AREA OF NEW / DISTURBANCE / PROPOSED WITH THIS / P�,pM/ENT #�?� AREA OF NEW DISTURBANCE 11 I I / PROPOSED WITH THIS �' POND B I1 \I A END N 2 o \I \\ APPROVED TRAP4C \ I may— -- y— I II I II� I I AREA OF EXISTING DISTURBANCE IIIIIIIII�IIIIIIIIIIf ��///I/ l; o yv\\ I APPROVED WITH II II III��III�II WP0201700037 II IIII II II AMENDMENT #1 i I / III IIIIII I\VI�\VA11 VA\\\\\ i o�� \ / IIIII I \\ \ \ y-- � I I I II — 1111 1 ll /q ////j _ _�� I of \ APPROVED III �� 1II IIII IIIIII II IIII\� \ � o I � I II \ I I I I I —_—_— �v7f- I :� I II \� \III IIIIIIII II IIII III IIII/ �1 / / I II - ICE RINKvvv 1 I/lI lI/I I lI l,ll% IIII , y y -� &PARKING I l \ \ \ III lI IIIIl�l/ll/ 11/// / /// 11/� / r� — \\ \ \ � I I I t34/— �/� 42 I I J,26 A —/� 22 2 42 /III \\ `III; I; 10/1 i i II�1'i i 1111ilI / / ; \ I I I� I I I APPROVED I: \\llllllllllllllllllllllllll I IIII IIIIII\I\ 1 POND #4 j//\IIII\\\\V\\\\V\\\\\\ \\\\\\\\\\\ \\11 \ \ I l l/ll� y 382 I I IIII II 3gU o I U� .c v EXHIBIT OF CURRENT APPROVED INFORMATION scnLe r•=ioo' SIT RHO PO`p -"\ GRpON�S Rpq� SCALE: - = 200(0' Sheet List Table Sheet Number Sheet Title 1 COVER z EXISTING CONDITIONS 3 EROSION & SEDIMENT CONTROL PLAN NOTES, NARRATIVE & DETAILS 4 EROSION & SEDIMENT CONTROL PLAN OVERVIEW 5 PHASE IA EROSION & SEDIMENT CONTROL PLAN 6 PHASE IB EROSION & SEDIMENT CONTROL PLAN 7 PHASE IC EROSION & SEDIMENT CONTROL PLAN 8 PHASE ID EROSION & SEDIMENT CONTROL PLAN 9 PHASE IIA EROSION & SEDIMENT CONTROL PLAN 10 PHASE IIB EROSION & SEDIMENT CONTROL PLAN 11 PHASE IIC EROSION & SEDIMENT CONTROL PLAN 12 PHASE IID EROSION & SEDIMENT CONTROL PLAN 13 EROSION & SEDIMENT CONTROL PLAN DETAILS 14 PRE DEVELOPMENT STORMWATER MANAGEMENT PLAN 15 POST DEVELOPMENT STORMWATER MANAGEMENT PLAN 16 STORMWATER MANAGEMENT DETAILS 17 STORMWATER MANAGEMENT DETAILS 18 STORMWATER MANAGEMENT DETAILS 19 OVERALL BROOKHILL STORMWATER QUALITY COMPLIANCE TABLE 19 TOTAL SHEETS EROSION CON TROL * HANDBOOK SPECIF CA TIONMENT NUMBER CONTROL CENUMM CONSTRUCTION ENTRANCE 3.02 CR CRS CONSTRUCTION ROAD 5.05 STABILIZA TION SFx x x SILT FENCE 3.05 ST SEDIMENT TRAP 3.13 SB SEDIMENT BASIN 3.14 OP OUTLET PROTECTION 3.18 RR RIPRAP 3.19 CD ' CHECK DAM 3.20 TS TS TEMPORARY SEEDING 3.31 PS PS PERMANENT SEEDING 3.32 TP TREE PROTECTION 3.38 DC DC DUST CONTROL 3.39 APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNER/ZONING ENGINEER INSPECTIONS ARB DEPARTMENT OF FIRE RESCUE ALBEMARLE COUNTY SERVICE AUTHORITY VIRGINIADEPARMENT OF TRANSPORTATION HEALTH DEPARTMENT \jAH 0� \SCOTT R. COLLINS Z U Lic. No. 035791,E 1o�o��NsvOIVALG���4 E� z O � U Lf) co Z 00Q O w H W w 0 W N Q N o N in W t C� M N i NC N N LLJ J_ LU 0 Q U LU U) LU LU U) LU rQ V 0 N w J LU w O w V) a JOB NO. 182150 SCALE AS SHOWN SHEET NO. 1 _ \s ` V A1 A A GENERAL NOTES: / _ VH \ v �, I 1 / 1 III/A III I I I I�� P 1 — i — _ —° — — / / / / / / / / = a V A \ V �������� �� ��� ���,, \ �� I. NO FLOODPLAIN EXISTS ON THE SUBJECT SITE PER FEMA <� �� / A� ��� 1 \ FLOODPLAIN MAPS # 51003CO280D. t � 1=I �_ — — g �/ / ��� y / / \� v _ y �� y� \V A � ; :. �\ v A� zo'ISAN TARSTING Y�SEWER EASEMENITARY SEWER T I �� A\ \ 1\ 2. BEFORE BEGINNING SITE WORK, THE CONTRACTOR SHALL �/ I J — ! BLOCK / / v \ INVESTIGATE AND VERIFY THE EXISTENCE AND LOCATION OF / % / SCOTT R. COLLINS''Z moo—--� vv UNDERGROUND UTILITIES, MECHANICAL AND ELECTRICAL SYSTEMS, T/ �/ U Lic. No. 035791� — AND OTHER CONSTRUCTION AFFECTING THE WORK. BEFORE //� — — — — eo CONSTRUCTION THE CONTRACTOR SHALL VERIFY THE LOCATION AND INVERT ELEVATIONS AT POINTS OF CONNECTION OF SANITARY IO L —,� \V 1 I I A SEWER, STORM SEWER, AND WATER -SERVICE PIPING; NA — I I L 1 ✓ / \ ALBEMARLE COUNTY / / \/' �\ // BLOCK 11 \ \ \\ ��� \ �� _ �\_� /� I �� 11 \\ / / // \ \ \ A \ vVvvv� _�� A , , \ V UNDERGROUND ELECTRICAL SERVICES, AND OTHER UTILITIES. THE MANAGED STEEP SLOPES /— _ / / / _ v — / — \ �� vv� v\ ��.,� °�` VA `\ CONTRACTOR SHALL FURNISH LOCATION DATA FOR WORK RELATED v vvv �v �.A v� o A !/ \ \_ _ �s - - 1 \\ TO PROJECT THAT MUST BE PERFORMED BY PUBLIC UTILITIES SERVING THE PROJECT SITE. ��v_ vvv vvv / , / \, - _ , — — / / / ✓ /� / // �\ ���� j1 \� _ - I l) I o\ \ \ 3. CONTRACTOR SHALL VERIFY SIZE, TYPE & LOCATION OF EXISTING UTILITY LINES ON THE SITE. 0 UNTY\ ( 1 \\ 4. THIS PROJECT INCLUDES A PROPOSED GREENWAY. / I PRESERVED STEMARLE EEP SLOPES �� \ ��� 1 0 yam. I I� LIMITS OF SUNNY I i0o � A� IIII I( �I _ - _ - v b _ will ���A —°— `� — 4 / �v �/— DAY DAM BREACH II I I t/I � \s vv I III v, — �I II I I I11 I A �� \ � -� y � / _ _ � °°— � � — i �� _ • \:.•: \ I s '� -. � � k_"6 I ,v v, n PROPOSED m \ .:: :\ \ I to""�::% _ Z Z) � � ° w — — - GREENWAY, TYP. °� o Q I I I I III III ��lll(i > z I 11 E ... . _ —s _ . �� •,._— — — — , - \ \� _OF TREEL NE EXISTING ITS �\ A) /o II 0 � .-LIMITS OF ENIA APP�VED• 1 iooYRFLOODPLAf 11 I 1 \\ I 413 I dIl\ \V_ BLOCK I_ v SDP2o1800014=_ ISTI -GO° STREAM �t INITIAL SITE PLAN 4 / — 1\ A1V V A VA PROJECT BOUNDARY (TYP.) i APPROVED o5/a5/zoi8 sDP2oi80005o / BLOCK z v v � _ ��,�:_ y•_ _, — -���o� o ° o w � \. .c�., :\ 1 A ` \ V A \ FINAL SITE PLAN / PROJEAC\T BOUNDARY OUNDARY TYP. SUB2oi80008i ,/�_��— —_ *��'-• ��_�= ���o �%I v \ \ \ \ \ \ \ \ j Lu IN \ \ v � ko 4 �A I I � III � I , — � I 1 � � v � � � // � i i , — , — •-, vv �A \ � � — I� I EXISTING DIVERSION— \\ J \ AREA OF N W DISTURBANCE - — �\1 Av�v\v5=y vvvv ��\' BLOCK I I PROPOSED WITH THIS 1I I I v v I\ AMENDMENT #2 TMP: 04600-00-0o-o18Bo OWNER: HORNE LAND CORPORATION �II \\� �A I\ I 1 1 \ACREAGE: 46.43AC � I A — L9 ZONING: RURAL DB/PG: 624/191 / \ �I II I IIII I �I III II II I �Q o° M EXISTING PROPOSED ROAD RAP 4C hIII cti�N \zJ (CURRENTLY UNDER REVIEW) / // — — — — vvv \\ l � s / ��// _- � / , // I ,,-o� / , �, � ,l, l 111 ll I � �, l I � v � � I // / / ���/\ � // l \ \\�\ I 11 --_y_ —_\ I Ip EXISTING DIVERSION � v o IIII II\ \ No 1v vvvvvv\v\ O AREA OF EXISTING % LL vv vvv III III\ I II II — II CII III�II\IIIII\IIIIVIA��III\1I III' II1II1III,III\1IIVII1 IIAI,I IIIIIIIII I� �II� —v— \. = / i / i _— —�-/- —//i_ �/ � ,/ �/ �1,�j�1/k1_ I// �// �/�'I�■�� 000� / I II�1� j���/\� � v ,\,�\�vv\ _ \� I \ V v\ \A1 I\ \� I I W NDISTURBANCE (��, If If I 0I, WP02010O37 EXISTING DIVERSION If AMENDMENT #1 / /o If II NW V Q I I I I I If_ A� v � -. �- A ��� �� Z / � Z IIII I I II I I I I / I I -I--� _ / AREA OF NEW LLJ �--� IIII III I I I IIII I I I I ;I �/ / /—L , DISTURBANCE PROPOSED ,EXISTING GRAVEL \ALBEMARLE /COUNTY rI III II I \� W no I�II I I I ACCESSWAY MANAGED STEEP SLOPES oPES I I 1AMENDMENT#2 _ I Lu Tz� O Q U III I I I I I II I I I� V IIII I I I I I I // � III v I I �I I I I I I I I 111 //� o/ - 2 APPROVED I I I III IIII I I I II III. (� �� vvv --� _ � / I .� (D II II11� 1 \III III I rl III I I I \ 111 I jI II vv A \ lII�IIII�III��I�II I IIIIIIII/ / II �� Z II �1& PARKING � I F,-- , � \ � I IIII I , i11 Lu �--� IIIII II 1 \IIII II I I I IIIII I I I �I I ; A� / / / I I __ _ — — I �G vV I I I I IIIII I I I I I I I I/I EXISTING I 1\ V X _� A FLu - IIII I I I I II I I POND #4 ' I� I v — W �' � I I I I 111 �1�11\ I 1 I o \ III I II I I I II I I 7 �f %---=H►-AMAND�Rul i / III I \ \ I I STREET` I / 111 II II IIII I 1Lu t I� \ IIIII�II II III III I I III I I / �7-- �4 I IIIII II�III I�I II III 1 I I III IIII I I I I %\\\ \ . W PROJECT BOUNIIII IIII I/�/I IIII I I I / � � IIII II I I I � / I I � � \\ / \ o / l / ✓ / /— \� � � .....,:. '.:...\ ,l�//ll /ll���� __—� � 1 II gn \ � \ � \ \ i@ ,\` F- I III I I 1 /IIII IIIII I I A l I / 4 / I I / // ,, 5N I �II l II I I I I IIII ( \ ,� U F- / W I I I I I IIIvv _ v v O / 42 � /\\ � � � / / / / �'/ I \ \ \ — �� _ v v v I � � � � \ \ � J < I III / I i v A 1 I I I zoo _ v—vvv vV / \ IIII I 1 II III I ✓ I III \ v _/ / / / / / �J42 II1k V \ \� \�\ VA� Q IIII O I II Ill \ \ s o I , vv �\ v_ 1 0 //� v I I I I I I / I I\ ( �L:: Lu / / \ II \ \ / \ / / /�� A A I n \ vv vA v vv �� v v� � / AVvv Lu ; �/ JOB NO. �/ VAV A II y v 182150 / \ 11 \1�111I 1 SCALE \ 11 432 \ \� v`� v \� v � � � �\ �� � A �Vv , I • o v � \ 1 _ 100 � 42 � ' �- SHEET NO. I I I ESP � v h v v v � \ \ VA A � A A\V \ � -/ // I I I I � _ _ v \ 1 V 3ga \\VA �\ � v v v�,o— — /// // �//���! i I I I lily �>� Ioo'ft. �� vvv � � v v � I \ I \�\V �� o0 , �\ EROSION & SEDIMENT CONTROL MEASURES: STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING. 3.01 SAFETY FENCE. - A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. 3.02 CONSTRUCTION ENTRANCE.• A STABILIZED CONSTRUCTION ENTRANCE LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. 3.03 CONSTRUCTION ROAD STABILIZATION. - THE TEMPORARY STABILIZATION OF ACCESS ROADS, SUBDIVISION ROADS, PARKING AREAS, AND OTHER SITE VEHICLE TRANSPORTATION ROUTES WITH STONE IMMEDIATELY AFTER GRADING. TO REDUCE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC DURING WET WEATHER AND TO REDUCE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE TIME OF INITIAL GRADING AND FINAL STABILIZATION. USE WHEREVER STONE -BASE ROADS OR PARKING AREAS ARE CONSTRUCTED, WHETHER PERMANENT OR TEMPORARY, FOR USE BY CONSTRUCTION TRAFFIC. 3.05 SILT FENCE.• A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 3.07 STORM DRAIN INLET PROTECTION. A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PROTECTION APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA. 3.09 TEMPORARY DIVERSION DIKE.• A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT SEDIMENT LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT TRAPPING FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWA TER RUNOFF MUST BE TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE. 3.11 TEMPORARY RIGHT-OF-WAY DIVERSION. A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONSTRUCTED ACROSS DISTURBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. TO SHORTEN THE FLOW LENGTH WITHIN A SLOPING RIGHT-OF-WAY, THEREBY REDUCING THE EROSION POTENTIAL BY DIVERTING STORM RUNOFF TO A STABILIZED OUTLET. GENERALLY, EARTHEN DIVERSIONS ARE APPLICABLE WHERE THERE WILL BE LITTLE OR NO CONSTRUCTION TRAFFIC WITHIN THE RIGHT-OF-WAY. GRAVEL STRUCTURES ARE MORE APPLICABLE TO ROADS AND OTHER RIGHTS -OF -WAY WHICH ACCOMMODATE VEHICULAR TRAFFIC. 3.13 TEMPORARY SEDIMENT TRAP. A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAYBE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION WITH A TEMPORARY DIVERSION DIKE. J.14 TEMPORARY SEDIMENT BASIN. A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWA TER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY IMPOUNDMENT. J.18 OUTLET PROTECTION. STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE POTENTIAL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWA TER FLOWS. APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS. J.19 RIPRAP: A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE POTENTAL FOR INFILTRATION, AND TO STABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND WATER INTERFACE AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETATIVE COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS. 3.25 UTILITY STREAM CROSSING. A STRATEGY FOR CROSSING SMALL WATERWAYS WHEN IN -STREAM UTILITY CONSTRUCTION IS INVOLVED. TO HELP PROTECT SEDIMENT FROM ENTERING THE STREAM FROM CONSTRUCTION WITHIN APPROACH AREAS TO MINIMIZE THE AMOUNT OF DISTURBANCE WITHIN THE STREAM ITSELF. GENERALLY APPLICABLE TO FLOWING STREAMS WITH DRAINAGE AREAS LESS THAN ONE SQUARE MILE. 3.31 TEMPORARY SEEDING. - THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 3.32 PERMANENT STABILIZATION. THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. 3.38 TREE PRESERVATION AND PROTECTION. PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACTIVITIES. 3.39 DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. EROSION CONTROL LEGEND SA SAFETY FENCE 3.01 0 0 CE CONSTRUCTION ENTRANCE 3.02 CRS CONSTRUCTION ROAD STABILIZATION 3.03 SF -X X X- SILT FENCE 3.05 lP (D INLET PROTECTION 3.07 ClP CULVERT INLET PROTECTION 3.08 DD TEMPORARY DIVERSION DIKE 3.09 RW TEMPORARY RIGHT-OF-WAY 3.11 ST DI VERSION TEMPORARY SEDIMENT TRAP 3.13 SB SEDIMENT BASIN 3.14 OP PIPE OUTLET PROTECTION 3.18 CD ' CHECK DAM 3.20 TS TS TEMPORARY SEEDING 3.31 PS PS PERMANENT SEEDING 3.32 BM SOIL STABILIZATION BLANKET 3.36 TP0 0 TREE PROTECTION FENCING 3.38 DC DC DUST CONTROL 3.39 * VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER 1. SET POSTS AND EXCAVATE A 4'X4" TRENCH UPSLOPE ALONG THE LINE OF POSTS. �I I III I FLOW J11, III- J. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND I T INTO THE TRENCH. EROSION CONTROL NOTES: 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. J. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7.• 00 AM TO 9: 00 PM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL MAINTAIN REMOVE OR CONVERT TO PERMANENT STORMWA TER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. AL TERNA TI VES ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS11000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 957 KENTUCKY 31 OR TALL FESCUE AND 0-59 PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 8OLBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. 19. MAINTENANCE.- ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 509 OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. 21. THE E&S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE E&S CONTROLS AS NECESSARY IN THE FIELD AS SITE CONDITIONS CHANGE. IN ADDITION, NO SEDIMENT BASIN OR TRAP CAN BE REMOVED WITHOUT WRITTEN AUTHORIZATION. SOIL DESCRIPTION.• SOILS ON -SITE ARE CURRENTLY DISTURBED AS MASS GRADING HAS OCCURRED IN ACCORDANCE WITH WP0201700037. 27B-ELIOAK LOAM-2 TO 77 SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 27C-ELIOAK LOAM-7 TO 15% SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 34C-GLENELG LOAM-7 TO 15% SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 34D-GLENELG LOAM-15 TO 25% SLOPES. SOIL IS WELL DRAINED WITH A HIGH RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-6" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80 ". 39D-HAZEL LOAM-15 TO 25% SLOPES. SOIL IS EXCESSIVELY DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-10" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 95-WEHADKEE SILT LOAM-0 TO 2% SLOPES. SOIL IS POORLY DRAINED WITH A VERY HIGH RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY SILT LOAM AND ABOUT 0-10" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY 0-30". REFERENCE: WEB SOIL SURVEY ONLINE DATABASE, FOUND AT h t tp: 11web soilsurvey. nres. usda. gov/applWebSoilSurvey. ospx FLOW 2. STAPLE WIRE FENCING TO THE POSTS. II � i-1i1-1 IIII; � I III ILA 4. BACKFILL AND COMPACT THE EXCA VA TED SOIL. EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. SUPER SILT FENC ssF (WITH WIRE -BACK o5-2 NO SCALE 1992 DESCRIPTION OF EROSION & SEDIMENT CONTROL MEASURES. EROSION AND SEDIMENT CONTROL MEASURES. IT IS ANTICIPATED TO USE A CONSTRUCTION ENTRANCE, RIPRAP, OUTLET PROTECTION, DIVERSIONS, SEDIMENT BASINS, AN EXISTING SEDIMENT TRAP, AND SILT FENCES TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES TEMPORARY STOCKPILE AREAS ARE NOT BE REQUIRED WITH THIS PROPOSED DESIGN. SHOULD FIELD ADJUSTMENTS NECESSITATE A SMALL STOCKPILE AREA IT SHALL BE DISCUSSED WITH THE ESC INSPECTOR AHEAD OF TIME. THE STOCKPILE WILL NEED TO BE MAINTAINED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON SITE AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH FAST GERMINATING VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. 3.01 SAFETY FENCE- TO DISCOURAGE ACCESS TO A PARTICULAR AREA. 3.02 CONSTRUCTION ENTRANCE - TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. 3.03 CONSTRUCTION ROAD STABILIZATION - TO REDUCE THE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE TIME OF INITIAL GRADING AND FINAL STABILIZATION. CONSTRUCTION ROAD STABILIZATION WILL BE APPLIED TO THE CONTRACTOR PARKING & STAGING AREAS AS NEEDED. 3.05 SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS 3.07 STORM DRAIN INLET PROTECTION INLET PROTECTION IS PROPOSED ON INLETS, WHERE SHOWN ON THE PLANS. 3.09 DIVERSION- PERIMETER DIVERSIONS ARE PROPOSED WHERE SHOWN ON THE PLANS TO DIRECT RUNOFF INTO A SEDIMENT TRAPPING DEVICE. 3.13 SEDIMENT TRAP- SEDIMENT TRAP IS PROPOSED WHERE SHOWN ON THE PLANS. 3.14 SEDIMENT BASIN- SEDIMENT BASINS ARE PROPOSED WHERE SHOWN ON THE PLANS 3.18 OUTLET PROTECTION -OUTLET PROTECTION IS PROPOSED AT THE OUTLET OF PIPES. 3.19 RIPRAP- RIPRAP IS PROPOSED AT THE OUTLET OF PIPES. 3.32 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED WITH THIS PLAN. 3.38 TREE PRESERVATION AND PROTECTION- TREE PROTECTION IS PROPOSED WITH THIS PLAN. SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS. 3.39 DUST CONTROL -DUST CONTROL IS REQUIRED AND PROPOSED WITH THIS PLAN. MAINTENANCE.• IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON -SITE WILL CHECK ALL EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS: a. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. b.ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. c. ALL SIL T FENCE BARRIERS WILL BE CHECKED REGULARL Y FOR UNDERMINING OR DETERIORA TION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. d. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD OR CONTRACTOR ON -SITE. THE CONTRACTOR AT THIS TIME IS DIGS. BROOK WOOD WITH DIGS MAY BE REACHED AT (434) 978-4435. IN ADDITION THE OWNER MAY BE CONTACTED. UPON COMPLETION OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE MAINTENANCE. EROSION CONTROL NOTES: ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES-2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES-J.ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES-4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES-5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. ES-7ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. ES-8:DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE ES-9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 3.01 1992 SAFETY FENCE PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE Source: Adapted from Conwed Plastics and VDOT Road and Bridge Standards PERSPECTIVE VIEW METAL FENCE Plate 3.01-1 EROSION CONTROL NOTES & NARRATIVE: PROJECT DESCRIPTION: THE PURPOSE OF THIS LAND DISTURBANCE ACTIVITY IS TO PROVIDE THE MASS GRADING AND ESC MEASURES FOR FUTURE RESIDENTIAL HOMES AND THEIR CORRESPONDING INFRASTRUCTURE. THIS PLAN IS AMENDMENT #2 OF THE APPROVED BROOKHILL SECTION 1 MASS GRADING VIRGINIA STORMWA TER MANAGEMENT PLAN AMENDMENT #1, WP02017000JZ THIS AMENDMENT ADDS AN ADDITIONAL 8.90 oc. OF LAND DISTURBANCE TO THE APPROVED LIMIT OF DISTURBANCE LINE. THE PROJECT WILL BEGIN ITS CONSTRUCTION WITH THE PROPOSED ESC MEASURES IMMEDIATELY FOLLOWING PLAN APPROVAL, WHICH IS ANTICIPATED TO BE IN THE SPRING OF 2020. THE WORK /S ANTICIPATED TO BE COMPLETED WITHIN 18 MONTHS AND TO CONCLUDE /N THE FALL OF 2021. EXISTING SITE CONDITIONS. THE AREA OF THE PROPOSED DEVELOPMENT IS LARGELY WOODED AREAS WITH OPEN SPACES AND LIGHT UNDERBRUSH. THIS SITE GENERALLY SLOPES FROM THE WEST TO THE EAST, AND HAS A DIVIDE AT THE MIDPOINT DRAINING TO BOTH THE NORTH AND THE SOUTH. THE SITE /S GENERALLY STEEP AND /S WELL DRAINED. AN EXISTING, APPROVED SEDIMENT BASIN #4, AND SEDIMENT TRAP 4C ARE ON -SITE PER THE APPROVED PLANS, WP02077000Z7 AND WILL BE UTILIZED FOR THE MASS GRADING PLAN OF THIS SITE. ADJACENT AREAS.• THIS SITE IS BORDERED TO THE EAST BY A STREAM PROPOSED TO BE PRESERVED. NORTH OF THE PROPOSED SITE IS BROOKHILL PROPERTY. WEST OF THE DEVELOPMENT IS STELLA ROAD, UNDER SDP 201700117, AND SOUTH IS SALAMANDER STREET. SILT FENCE WITH WIRE BACKING, DIVERSIONS, SEDIMENT BASINS, A SEDIMENT TRAP, INLET CONTROLS AND VARIOUS OTHER ESC MEASURES ARE PROPOSED TO LIMIT THE POTENTIAL FOR CONTAMINATION OF THESE ADJACENT PROPERTIES AND WATERWAYS. OFFSITE LAND DISTURBANCE.• OFFSITE LAND DISTURBANCE IS LIMITED TO PUBLIC RIGHT-OF-WAY AND AREAS LOCATED WITHIN THE OVERALL BROOKHILL DEVELOPMENT BOUNDARY. SOILS. SEE SOIL DESCRIPTIONS ON THIS PAGE. THE EXISTING SOIL BOUNDARIES HAVE BEEN DISTURBED, AS THE PROJECT IS AN ACTIVE CONSTRUCTION SITE. CRITICAL AREAS. EXISTING WETLANDS AND INTERMITTENT STREAMS ARE LOCATED ON THE PROPERTY DOWNGRADIENT FROM THE PROPOSED DEVELOPMENT. THESE AREAS, IN ADDITION TO THE MANAGED AND PRESERVED STEEP SLOPES, ARE CONSIDERED TO BE CRITICAL AREAS THE CONTRACTOR SHALL GIVE EXTRA ATTENTION AND CAUTION IN AND AROUND THESE AREAS TO ENSURE SEDIMENT IS NOT DEPOSITED ON THEM OUTSIDE THE SCOPE OF THE PROPOSED PLAN. TREE PROTECTION FENCING, SILT FENCING, DIVERSIONS AND SEDIMENT TRAPPING DEVICES SHALL ALSO BE INSTALLED AS A FIRST STEP IN LAND DISTURBANCE TO ENSURE THESE CRITICAL AREAS ARE MAINTAINED. SEQUENCE OF CONSTRUCTION. 1. CONTRACTOR SHALL NOTIFY THE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPARTMENT TO SCHEDULE A PRE -CONSTRUCTION MEETING. 2. PRIOR TO DISTURBANCES, THE LIMITS OF DISTURBANCE SHALL BE FLAGGED AND THE TREE PROTECTION FENCING SHALL BE INSTALLED. J. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. 4. INSTALLATION OF THE PROPOSED CONSTRUCTION ENTRANCE SHALL OCCUR NEXT. THE CONTRACTOR SHALL APPLY CONSTRUCTION ROAD STABILIZATION AS NEEDED. CONTRACTOR SHALL ENSURE THE CONSTRUCTION ENTRANCE DRAINS TO AN ADEQUATE E&S MEASURE. THE CONTRACTOR SHALL UTILIZE THE NEARBY SEDIMENT TRAP FOR VEHICULAR WASH OFF. CONSTRUCTION ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. 5. THE INITIAL ESC CONSTRUCTION MEASURES AS SHOWN ON THE PHASE l EROSION & SEDIMENT CONTROL PLAN SHALL BE INSTALLED NEXT. THE CONTRACTOR SHALL BEGIN BY INSTALLING THE PERIMETER SILT FENCE. PERIMETER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 6. ONCE THE PER/METER EROSION CONTROL MEASURES HAVE BEEN INSTALLED, AND THE COUNTY INSPECTOR HAS APPROVED THESE MEASURES, THE CONTRACTOR SHALL PROCEED TO REMOVAL OF THE EXISTING INTERIOR SUPER SILT FENCE ALONG THE OLD LIMITS OF DISTURBANCE LINE, AND LIGHT CLEARING OF THE SITE. THE CONTRACTOR SHALL BEGIN BY CLEARING THE AREAS REQUIRED TO ACCESS THE LOCATIONS OF SEDIMENT BASIN B, AND THE AREAS DESIGNATED AND/OR APPROVED BY THE INSPECTOR FOR CUT REQUIRED FOR THE BASIN INSTALLATION. INSTALLATION OF SEDIMENT BASIN B SHALL IMMEDIATELY FOLLOW THE SELECTIVE CLEARING. FOLLOWING THE INSTALLATION OF THESE MEASURES, THE CONTRACTOR SHALL INSTALL THE DIVERSIONS. THE EXISTING DIVERSION DIRECTLY SOUTH OF THE BASIN B CUT SHALL BE ADJUSTED PER THE PLAN, TO MAINTAIN POSITIVE DRAINAGE TO THE EXISTING STORM DRAIN. ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE I EROSION CONTROL PLAN SHALL ALSO BE CONSTRUCTED AT THIS TIME. 7. ONCE ALL THE PHASE / EROSION CONTROL ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE IS PROPERLY CONVEYED TO THESE MEASURES, AND THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONTRACTOR CAN BEGIN CLEARING THE REMAINDER OF THE SITE. TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. 8. AFTER CLEARING THE PROPOSED AREAS, THE CONTRACTOR CAN PROCEED TO PHASE // OF THE EROSION & SEDIMENT CONTROL PLAN. UPON INSPECTOR APPROVAL, THE EXISTING SEDIMENT TRAP 4C CAN BE REMOVED. THE CONTRACTOR SHALL BEGIN ROUGH GRADING THE SITE TO THE CONTOURS SHOWN ON THE PHASE ll EROSION & SEDIMENT CONTROL PLAN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 9. THE CONTRACTOR SHALL INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE H EROSION CONTROL PLAN. TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. 10. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STAB/L/ZA T/ON SHALL BE APPLIED WITHIN SEVEN DA YS TO DENUDED AREAS THA T MA Y NOT BE A T FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 11. THE CONTRACTOR SHALL MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR /N ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 12. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. GENERAL SLOPE (3:1 OR LESS) PER ACRE TOTAL LBS KENTUCKY 31 FESCUE 128 LBS. 3.11 paved construction entrance for erosion control plans Source: Va. DSWC Plate 3.11-1 RED TOP GRASS 2 LBS. SEASONAL NURSE CROP 20 LBS. 150 LBS SEASONAL NURSE CROP FEBRUARY 16 THROUGH APRIL ANNUAL RYE MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15 WINTER RYE NOTES: 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION Source: Ira. DSWC OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. TABLE 3.31-13 PERMANENT SEEDING SCHEDULE ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR ALL REGIONS' Rate Planting Dates Sneciu lbs. acre Sept. 1 - Feb. 15 50150 Mix of Annual Ryegrass (Lolium multi-Rorum) & 50 - 100 Cereal (Winter) Rye (,Secale cereale) Feb. 16 - Apr. 30 Annual Ryegrass (I.&HUm multi amm) 60 - 100 May 1 - Aug 31 German Millet (Setaria italica) 50 Source: Va. DSWC STONE 70' WIIN•- CONSTROOT N ACCESS 7 C3" S%i- FOURSE2A ASPHALT 'OP -_ 7EXISTING PAVEM NT MIN- 21A AGGREGATE BASE MIII STONE70' CONSTRUCTION � ASPIu1LT PAVED AG:.E55 - �ti;� �� iMASNif 01 EXISTING 2!S 21 PAVE41fNT 12 MA.4 12% IF *t UST EXTEND FULL wlpTla u 1 -POSITIVE DRMNAIGE T� solwlErrT OF INGRESS AND EGRESS ip TRAPPING DEVICE OPERATION PLAN E $' MIN. PMTIVE DIRA 1AL:L TO SECIMENT 7 ITRAIRPNG DEVICI �'��'- �- �•.~_-_tip-•- --- -� -- � - �`-. --t-�= �-� FILTER CLCTI1I--o' SECTION A -A A niiiiiiinkm W.ifa tFip of 1 u1.111119, t Ur MI: f.-Mol �%If11 a Mi tpltllr►1 1 inch balkoc% x$utolf i ahc a wti pa, h lrotie NOW a dmin ter of 1.5 iuChra for ad"late COI A311l 1}1e4s11le. WnAl %V3111 uLJI�f be caU13LI l 1%VI f101H the eslgauCC to All IIIVPF `• 'ed :!ettlul2 al ea In leauc+re r-eiLlLl@llt. 4 : iurierli Amll be prevailed 5•oiu culemmIg StGjin ill alas, ddchee_- of wataI;owses. PAYED WASH RACK Nr 1992 NO `;CAI T (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) FILTER FABRIC ENTRENCHED 8" COMPACTED SOIL 3' MINIMUM 1.8" 1�JII �I-IIHI= _III-1 I CI I L-1 I _� I I� I I I i II I LI I LI I I-IIII I I DD TEMPORARY 18" DIVERSION BERM 3.38 Source: Va. DSWC Plate 3.38-2 6TH 0� O Cl O SCOTT R. COLLINS,--* Lic. No. 035791 s t SION�IL E� z O J a U w Co Z 0 (n Oz Q O H ~ H- 5 w V) CY Immi 0 w N Q 0 N N j j 0 C'7 r) w J U) J_ W m W \w Z w J H H_ LU w w a JOB NO. 182150 SCALE N/A SHEET NO. 3 2 NOTE: THIS EROSION AND SEDIMENT CONTROL PLAN IS AMENDMENT #2 TO THE APPROVED BROOKHILL SECTION 1 MASS GRADING VIRGINIA STORMWATER `�H / I \ o \ \ _ MANAGEMENT PLAN AMENDMENT #1 BY BOHLER ENGINEERING, WP0201700037. EXISTING SEDIMENT BASIN #4 IS APPROVED AND CURRENTLY IN USE \ \ ON SITE. THIS PROPOSED AMENDMENT SHALL UTILIZE THIS BASIN TO TREAT A REDUCED DRAINAGE AREA FROM THE APPROVED PLAN (16.02 ACRES _ VERSUS THE APPROVED 16.18 ACRES), AND EXPAND UPON THE APPROVED PLAN WITH THE ADDITION OF PROPOSED SEDIMENT BASIN B, TO TREAT -----___---SHEETS 7 & 11 �" DISTURBANCE IN THE NORTHERN PORTION OF THE TOWN CENTER PROJECT. / � \ \ o \ \ \ � / � � I I I I / SCOTT R. COLLINS � _I 1 \ SH�ETS 8 & /12 \ /AAE\ _ \ \ \ U Lic. No. 035791,� �kSIONAL o ° 0 uo \ i _ O\ \ \ \. \ \ ° w co \�\ Lu ° \\ \ Lu y\ v 1 I / pR/ 6-POS E D��/ A \ AREA OF NEW DISTURBANCE G r I A 1 i � SEDIMENTS \ _ _ PROPOSED WITH THIS I I \ BASIN r I AMENDMENT #2 o _ jol l I w v T 013 III I I III I J D ----- _A I I 1A ° I- rl Lr) D - WAz APPROVE QQ EXISTING cle) D I� I SEDIMENT I I / F TRAP 4C \ I I I / cyi Q o N w o I(IMIL o NT LLJ LLo DC w w LL AREA OF EXISTING I I I I� IIII 11� _ / \ \�v \ W O DISTURBANCE APPROVED WITH WP0201700037 AMENDMENT #1 _ / \ \\ � � � � � �� \ O � V / � ® w CK � 454 \ \\ \ \ V� \ ALu — 1_ z \\ \ y..y. 11 i AREA OF NEW I I DISTURBANCE \ I I 11I _ j / ° I W CK I 1 _ W PROPOSED / \1I III I 1 I II1� WITH THIS � {�r,oAMENDMENT #2 1 — Oz 1w 1 / I I I I / / I I /i— �� o w J �J \\ I II I I I11 llll l 1 1 / i D�\�9 I /// / 1 \ I �\ w J � z . I Z / \ I II II I II IIII I II APPROVED W \ I I III U) EXISTING \ _ SEDIMENT \\\ \\ \ I I I I I I I I I I I I 1 1 \I \\ BASIN 4 C - W W I111 \ \\ \ \\\\ \\\ \ as o0 — I / SALAMA DER STREET � w / o JOB NO. 182150 O I SCALE , min lit L—I \ s 380 SHEETS 6 & 10 SHE 5 � 9 SHEET NO. 41' Q \ \ / I \ \ 4 W cj� FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL z pcf) ENSURE VOLUME CAPACITY IS 10% LARGER THAN THE ■ ■ ■ \ / / ( � J MAXIMUM VOLUME OF STORED FUEL.— ° o PHASE I c/) cn DRAINAGE - \ \ ����■� W ■■ J DIVIDE ° ° o I I ■ EXISTING e JI APPROVED \ \ � � � _ -__ I T DIVERSION DIKE �� / i/ /♦� / s �. ss MATCHLINE, SEE SHEET 7 • ° aD° DD n F JJ- \ D J IN ■ I 5 5 5 5 5 ® 5 t6NG EXISTING \ AC E SED FROM THIS n cn APPROVED 1 �/� > OCA N ON STELLA LANE ; ACCESS I VJ / N ° I W p I p P SE I DRAINAGES DIVIDE \ / C? EXISTING APPROVED SUPER SILT FENCE I / 1 0 \ WITHIN PROPOSED EXPANDED LIMIT OF I DISTURBANCE AREA TO BE RELOCATED I / o N i \ � / / : TO BOUNDARY OF NEW LIMIT OF DISTURBANCE LINE PER THIS PLAN ■ ■ 0 ■. / ° D P DOSE NEW n cI l■■■®®�■■■■L ■■■■■■■cn co MITS F e 11 � \D STURB NCE U) c EXISTING APPROVED LIMITS SSF PROP ED OF DISTURBANCE / ♦ D C / 1 - -- F WIT IRE AC G v �I 71 cyi Z N z I D PROPOSED I 0 EXPANDED LIMITS f OF DISTURBANCE AREA I I � _ ESC Q - ♦ PHASE ILLI \ - � ♦ SEDIMENT 1 Ld (n ® - - -- I ♦ BASIN J< L 1 U) u I w D cn ,, — — — — - W O W cn ♦ `�' • �� = W \ � ♦ 0 I 06 / \ PS ♦ = z ■ '**"mom • "■■■■■■■■■■■ ��■ W SEXISTING ~ � � SSF SS� O ■ APPROVED --- / O q SSF DIVERSION DIKE Cn Cr SSF ■ / U SSF 1 ^ w o �� — ■ / j _ ■ ♦� W LLi J W ■_ n■ — �, _ _ — — SSF sP D D/° S SSF SSF F S-F SSF SSF SSF FL SSF SF SSF SF SSF SSF SSF SSF 6 ��s. s. s. D° ° W ° ee 0 qq2 SSF PROPOSED W W N W W W W�W W SF WITH WIRE W W \ �W W W W W W W\ W\ // i i Q O SSF PROPO B C'ING SALAMANDER / / =- o / STREET / / / ' / _ - - , BACKING CC) D D° W D SI a J / �-�SS S ASS ASS ASS ��S S ��� �S � ASS S ASS SS ASS � S ASS / \ \ W \ 456 \ \ 0 W JOB NO. V A 5 5� ® 5 ®o I ss ass ass I �XISTING ! / ss� ICAL\APPROVED LIMIT \ \ \ 18s2 cA1L5E 0 s EY 3 15 ao s120 OF DISTURBANCE I EXISTING 43 I A PROVED SUPER ss ILT FENCt T ASS � —30 \ I / REMAIN D. ° `� I / \ / / / \ \ __ SHEET NO. ( NFEET) / I / / J \\ 1 in — 30 f t. �/ �; / S / �S 5 �LZH o��� SCOTT R. COLLINS� U Lic. No. 035791,1, o�� I IO v G7-7 I I I I ROPOSED SF,,,-,, I I \ WITH WIRE �� I I V \ I L �� I I/ BACKING � � � / / � � I � � I I II y \� ICI II III I � I / \ 0 SCOTT R. COLLINS'� I I I PROPOSED TREE I I I II ■■ I I III I II I II I III II III I I �PROTECTION � IIj `�, �I - FENCING TO BE INSTALLED AU c. o. 07 91 PROPOSED ALONG LIMITS OF DISTURBANCE EXISTING, APPRO LINE TO PROTECT PROPOSEDEXPANDED LIMITSO DIVERSION DIKE OF DISTURBANCE TREELINE (TO BE MODIFIED) AREA MATCHLINE, SEE SHEET 8 11 111 11 PROPOSED ADJUSTMENT TO EXISTINGAN ODIVERSION ERSION DIKE FOR SEDIMENT I I I I I I 00 \ ` BASIN B TIE IN CONTOURS 11 I■II II111 II I � s ,— �� � I I I �, y \ - ■ I I I I I I I I F SsF III ,I 11 II � s IPROPOSED EXPANDED _ � - LIMITS OF / / �� ��� / � � SUMP AROUND STORM INLET DISTURBANCE / a PROPOSED UNDER SEPARATE SET u m I I I I OF PLANS \ ��� ��� \ \ o 0) p o \ \STING, APPROVED \ / �. ` \ \ \ (� w XISTING STORM STRUCTURES 1 \ \ \ \ I SUPS SILTF�NCE TO 1 FROM APPROVED WPO PLAN TO \ \ REMAIN \ \ \ REMAIN I \ \ \\' EXISTING STORM INLET \ \ \ ~ • RECEIVES FLOW FROM \ \ \ \ \O Lu I \ Lu 1 \ \ \ EXISTING DIVERSION \ \ \ \ \ / \ \� D KES, AND CONVEYS TO \� ISTING SEDIMENT � � sSF SF� ASIN #4 s \ ■ \ \ 7, \ \ O ISTING, APPROVED LIMITS OF I I I 1 w o � DISTURBANCE LINE � �� rlj � 1 \\ \ v I s CI _372� ■ \� \ \ I \ — I I �— / — I I O` WETLANDS, P. * I l / / \ l i I 0 O� y rn • \ [� EXISTING / O I I y M • • APPROVED C6 1 , DIVERSION DIKE I \ I I N I I I I \ �o / O y y y AN CY) • \ I I � \yyy\ Q ■ �• I I I I I I l \\ y� I N z ® � • ' I I / �- � � \ \ � 1 III N (D -j -j Q Ld —j < z 1 •••Lr)■ I I 1 1 l l l\ 1 • \ \ _ U u W TS I I/�\ ` Lu Lr)1 \ I EXISTING, Q0 • \ I \ \ O CW APPROVED SEDIMENT \ \ • G Lr)I I I I I I \ \ \ I Q 0 BASIN #4 \ \ I \ \ Z La LL] z I IIII I I 1\ \\ \\ p • ( 0 I I I I 1I1 \ \ • \°� \ ■�■■■■ \ � I I I I � I I I 1 \ \ \ \\ \ \ � as •••• ■ ■ ■ 1 1 1 1 1 \ \ \ \ \ \ \ \ \ \ • \ \ \ U o ■■■ •• I I I 1 \ \ - \ \ • \ w — ■ \ \ \ \ \ UP) 0 U) Q� / / /♦�; / 1 \ \ \ \ \ \ \ \ \ \ \ ♦LLI 0 w J w // / ///♦♦ I \� \\\\ \ \ \\ \ \\\\� \�� ♦� \\ w J cn / / / ///� ♦♦� / \ \\\ \\\\\\ \ \\ ♦♦ \I \ cn = _ SSF SSF SSF SS SSF SSFF SSF SSF SSF SSF/� / / / �•�I I \ \\ \\ ILu - - , / \ \ / / / , / ssF�' \ � , (D ss� PROPOSED SALAMANDER SSFWITH \ _ / / s o SFBACKINGIRE STREET / / / / / / / / / / �� / / I I \ N m / / Lu S / / / / \ Lu U �.�..� 0 i GRAPHIC SCALE / \ / / / / A / 380� �s V A O /O , !// JOB No. V I / / 1`� _ � _ 182150 30 0 15 30 60 120 y --�/ KEY � s � \ O SCALE DING 36 - , \ 1 ��=30' ( IN FEET ) I I T \ _ � ROVED SUER - _ _- EXISTING � \ I inch = 30 ft. I / SILT FENCE �P ' 3�0 _ — SHEET N0. -- -- --- APPROVED TREE \ \\ r� PROTECTION \ FENCING A 6 0I— / /40\ \ v � ���\�� � � � GRAPHIC SCALE I ��� 30 0 15 30 60 � 0 /8PTREEPROPOSEOil PROTEC ION \ \ / — — Z / / FENCING � � i � � ( IN FEET) 1 inch = 30 ft.- / - - PROPOSED NEW LIMITS OF — — _— — U)/ ��SS \ DISTURBANCE - V AA \ �n \ SS PROPOSED A V A SF WITH WIRE -� U�\ BACKING \ �v ��50 /■■■■■■■,�■■�� s \ \ T 0 PROPOSED �� ♦� A \ ASS\ \ V \� \ EXPANDED LIMITS -- ♦♦♦ SS� V A �\ — P \ V A�� .� / OF DISTURBANCE �n AREA ♦ \\ \\ \ \ \ \ ��'��� ' � � SSF _ � � � � \ \ \\ I � G APPROVED SUPER SSF \ \ SF WITH 100 STREAM \ ILT FENCE WITHIN PROPOSED SSF��,�� SSF A \ � — PROPOSED � s F� � � � LIMITS OF SSF WIRE � BUFFER LIDS OF � \ \ V A V A \ \ EXPANDED LIMIT OF �� \ SSF \ �� \ I� REAM, TYP. \ DISTURBANCE AREA TO BE \ \S \ �\ �n — DISTURBANCE BACKING TYP• \ RELOCATED TO BOUNDARY OF \ PROPOSED FLAT VDOT CLASS Al COARSE AGGREGATE \ \ SS \ A OUTLET PROTECTION w GEOTEXTILE FILTER FABRIC \ \\ \ \ / 'NEW LIMIT OF DISTURBANCE r SS � � � _ � � � � QP UNDERLAYMENT. FABRIC TO BE KEYED INTO EX. GROUND 9" \ V A 450 LINE PER THIS PLAN \ A \ \ A \ �ss� 3ss'��SSV A \ MIN. AT ENDS & ALONG PERIMETER. FABRIC TO OVERLAP A-� RR �s 3SS�` \ '�SS� MIN. OF 9" (L=33', W1=4', W2=15', D=18" MIN.) O \/ AP EXISTING �� \\ems ��-�S \ \ \ \ \ / PROVED LIMITS \ \ \ AS 3� A- \ / OF DISTURBANCE \ \ S� ■■� ■� ■_■�-■_■� V V A� S �,5 / � � , � � \ \ � � — _ � � ■ � \ ass ass � \ ASS � / � / � � � \ --�\\ � — �, � � v � � v ♦�®\ � V vas � V � � V � � �, �■ i � � �� \ sF� v � A � v � � � � ems\ — C/)�, \ \� \ \SSSF V �' � \ ♦ � � � � ASS /� PROPOSEDDDIVERSIONCONTRACTOR �/■ ■■■■ �■ I \ \ \sS SHALL ENSURE POSITIVE �• \ \ \ -� \ \\ F\ \ \ \ SLOPE IS MAINTAINED. \ ♦ \ I \ BERM SHALL BE \ \ • 1 \ STABILIZED AS A FIRST \ 1 I �� ■ ■ ■ ■ ■ ■ STEP IN DISTURBANCE. 1 I �• / i PROPOSED 18 DD \ DIVERSION. CONTRACTOR \ \ \\ \ --- - -- SHALL ENSURE POSITIVE ✓ \ / SLOPE IS MAINTAINED. BERM SHALL BE -li --- STABILIZED AS A FIRST _ _ EXISTING STEP IN DISTURBANCE. / / I \ _ � APPROVED DIVERSION DIKEzzz \ \ CONTRACTOR SHALL INSTALL A - -- - , \ RWD R/W DIVERSION ACROSS THE CONSTRUCTION ENTRANCE. \ PROPOSED PAVED \ / I \ CE CONSTRUCTION ENTRANCE / I / (12'x70' MIN.) w/ WASH RACK \ \ I & DOWN GRADIENT DIVERSION & SEDIMENT TRAPPING DEVICE i � f � I I EXISTING APPROVED SUPER \ s---SILT FENCEIWITHIN PROPOSED 1 EXPAN D LIMIT OF - \ I I W \ �\ \ \ DISTURBANCE AREA TO BE RELOCATED TO BOUNDARY OF 1 \ \ \ SSF \ NEW LIMIT"91F DISTURBANCE- \ \ SSF \ LINE PER THIS PLAN _ / - .El ° ° I \ \ \ N SSA - EXISTING /: / ! 00 - \ I \ \ APPROVED LIMITS �\ I / i \ W s SS I I I I I I II �I . ...........♦ \ \ \ \\ SSA OF DISTURBANCE W � c_ ESC PROPOSED n _ \ \ STOCKPILE - / X/ W — I4-1 CRS CONTRACTOR PHASE I \ \ Ss� PROPOSED STO / \ o LOCATION OF PARKING & \ SSF SURROUNDE BY I P RT - STAGING AREA SEDIMENT \ \ \ SILT FEN E \ ' I I I 0 A POTTIES ♦♦ \ SSF - L - * I ♦♦♦ \ BASIN B 71 LOCATION OF 15cy ♦♦ V A F \ Z I I DUMPSTERCf) ♦♦♦ II / II I I �� ♦♦ v - ♦ EXISTING / P li + THE FUELING TANK SHALL BE COMPLETELY ♦♦♦ , A PROVED SEDIMENT TRAP 4C _ --- SURROUNDED BY A 2' DEEP, 2' WIDE EARTHEN BERM ♦♦ \ (DRAINS TO PROPOSED SEDIMENT BASIN B) s SF\ - Io ° U) WITH A HEAVY MIL POLYETHYLENE LINING OR BE ♦� SSF \/ / / /��/• / LOCATION OF PLACED IN AN IMPERVIOUS OPEN -TOP DUMPSTER. ♦♦ ssF 7 ■ FUELING AREA ♦ \ � w I o L1J ■ FUEL IN EVENT OFOA SPILL. CONTRACTOR SHALN ♦♦♦ I I / / \�� \ / / / •/ / / ENSURE VOLUME CAPACITY IS 10% LARGER THAN THE ~ ■ Q MAXIMUM VOLUME OF STORED FUEL ■ ■ ■ a ■ ■ J PHASE I q 71 � DRAINAGE- \ MINNOW -MENA J I ■ DIVIDE \ \ � -■ -■ -■ -W��• ' i / / ■ EXISTING \ i a o - \ o o. LLJ , ° \ \ \ \ � I � IN APPROVED � � _ ----- o T ■ uI \ DIVERSION DIKE --------- MATCHLINE, SEE SHEET 5 �. � ° ASS ♦♦ SS\ KEY SCOTT R. COLLINS'� U Lie. No. 035791,� �O�SSIONAL E�GZ z O J d ZU Z) w CIO o 0zJ o Q zz � w CII H W w a) C'7 CY) ®N z IMIL �--� cy.) C) LL N Qz 0) (D Q N _j > Cn o LLi J Q G //�� � v / V' ® Lu ,-I z O w Q O w U I --I V) y U Lu G F— LU cu-) Ln� (n G cn v � w LLJ � W � J Vn z J-I Q U) w 0 O J O (D rne O 0 CV W w J w '-' w a � JOB NO. 182150 SCALE 1 "=30' SHEET NO. 7 / O � ` > \ O � O O O` ` //,,. ,�/ � O / 1 \ \ � I I TH � ♦ / \ O � \ \ \ yyyy\y � O ♦ � \ I I I I / �v °�� / — / o0001, ^��6/ / \ I \ 1SCOTT R. COLLINS_Z' �j I c \ / \ \ \ I I \ \ \ U Lie. No. 035'791,� � M...... —MONSOON I 1/ \ \ \ \ \ / / � � �► � � I I `\ �SSIONAL Fl�G MAPPED --- ----- - OOFLOODPLAIN I 1 y y s \ \ TYP. - GRAPHIC SCALE y y y y\ �n 30 0 15 30 60 120 y y \ C/) / O / / �/ ( IN FEET y y y \ \ \ o \ \� \ y \ 1 - - � / � � = �€t. y y yy S \ � Q \ 1 inch 30 O � O O y O O� OO O o 0 O - \\ \� y o \ \ \ � y � O y \ y O \ ` w IR M, P. �, — ✓ V — A J — \ y yy \ PRESERVED STEEP SLDPES, P. _ — - — A / v \ v O O y y \ \ W — — y / LL 10' WIDE TOP / OF DAM _ y y ELEV.=398' \ ���� — — v �� — A \ �� \ \ yy yy y yy y y \ �co PROPOSED 175.66' PROPOSED 100' WIDE VDOT CL. AI RIPRAP �/ / / / '— _ — -� \\\ • OF 015" CL. III RCP LINED EMERGENCY SPILLWAY CREST � �� \ � \y 1.14% w/ VDOT ELEV.=396.75'. SPILLWAY TO HAVE 4:1 � �� w rlj iss ss STD. EW-1 _ SIDE SLOPES FOR VEHICULAR r� ma -ma s TRANSITION I \ ��'— — S��SS� SS>c�s SS \ \ \ \ \�s ` o N mamma � \ 0 \ \ \ Xamamam s \ x \\ PROPOSED SUPER \ S �__■AS�� SILT FENCE \ A \ PUN\ � � � DA=2.35 AC. 950 L.F. SSF \ yy y — �1 L.F. / 0.25 AC. Clx L9 �5— \ \ \ \ �\ \ I \ • I y C� Y .I v y MZ � z / \ � A V A \ \ \ \ \ I y� N PROPOSED VDOT STD. B (048" REINFORCED CONCRETE OPENING)cy) C) TO SERVE AS 048" ESC RISER STRUCTURE. RISER TO INCLUDE A \ s CONCRETE FOUNP.ATION &TRASHRACK. SEE SWM DETAIL SHEET FOR I \ 1\ \ \ 1 I Q FOUNDATION & IWASHRACK SPECIFICATIONS. SEE SHEET 13 FOR VDOT LL \ I IS STD. B-1 DETAIL & VDOT STD. MH-1 DETAIL FOR THE ESC RISER \ I y d7 O — ' CONVERSION. ESC RISER RIM ELEV.=395.66' WITH DEWATERING \ I I 1 \ \ \ \ I I y I Q ORIFICE AT 392.3'. SEDIMENT BASIN CLEANOUT ELEVATION= 390.98'. I I I 1 h I 1 y y W N J PROPOSED 2' WIDE PROTECTIVE SWM BARRIER AROUND THE RISER TO BE (D Q (n J > CONSTRUCTED AT THE TIME OF THE RISER STRUCTURE's CONVERSION TO A� I I I I I I \\ O \ PERMANENT SWM RISER. SEE THE SWM PLAN FOR SWM BARRIER DETAILS. I I 1 / \ I W J -- — PROPOSED SAFETY FENCE, I I 1 I I J a z INSTALL SIGNS WARNING QUICK SAND, KEEP OUT" \� I I I N > O --€XISTING, APPROVED SUPER SILT I I I/ / I I / w FENCE TO BE REMOVED AND I I RELOCATED TO BOUNDARY OF NEW I I I I I I I GJ 1 O w � PROPOSED LIMITS OF DISTURBANCE /L9 J � ®� LINE PER THIS PLAN 1 I I I I \ I I O / � I I � � _ - O �� �, � I I �I .� Io Q EXISTING,1 �4 I I I I I O I I I = Lu APPROVED I \ I I O SSF SSF SSF SSF SF SS F SSF SSF LIMITS OF DISTURBANCE - WW S —— ---_ _ SF V ♦��♦ ♦ _J I I I TS I I II I I 1 I 1 I I I I IO I I II I I II I I S SPROPOSED06 __- EXPANDED LIMITSz — Z _ OF DISTURBANCE 1 W ` -- — — ♦♦ AREA I I 1 1 \ \ I I I I / I I I O LU Lrn Lu Lu ♦ l I I i l/ll LL � LLI Lu ---- NO — _ __ _♦\ O♦ \\ \ / / \ � PROPOSED \ I I I I � I \ \ \ i � — _ \ �.�♦ \ \ I — / / / LIMITS OF / 1 I O I I I I \ \ \ \ C DISTURBANCE w / I I I I % I \ \0 Q O cD I I \ / /l POSED SF \ DC I I II III RP � O WITH S F \ � N W I I \ H WIRE I \ \. \ I I I I I I I I I BACKING �O I ,Lu — \ PROPOSED TREE PROTECTION \ WA Luw II FENCING TO BE INSTALLED ! O p = PROPOSED / / �/ ALONG LIMITS OF DISTURBANCE a � ODD EXISTING, APPRO I I I I I — EXPANDED LIMITS / �� LINE TO PROTECT PROPOSED \ \ \� JOB NO. DIVERSION DIKE I I I I I I I I I / OF DISTURBANCE / TREELINE 1 • \ \ \\ ` (TO BE MODIFIED) I I I I I - / / ` \ 182150 I I I I I I AREA / \ \ MATCHLINE, SEE SHEET 6 E \ SCALE j„=30- PROPOSED ADJUSTMENT TO EXISTING \DD DIVERSION DIKE FOR SEDIMENT I I I I / / V \ SHEET NO. BASIN B TIE IN CONTOURS O 8 ■ I I I I I issF — — 0 W cn FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACI IS 10% LARGER THAN THE MAXIMUM VOLUME OF STORED, FUEL. c� ■ W a \ \ MATCHLINE, SEE SHEET 11 � °� e \ A ��� ■ I I■ I I■ I I■ I I■ I I I I■ I I■ I I■ I I■ I I■ I I■ I I■ I I■ I I �■ I■ I ■ I■ I ■ �SS ■ — — I PROPOSED PHASE II MASS _ ----- --- --- — — — \ GRADING CONTOURS �LZH o��� U` SCOTT R. COLLINS U Lie. No. 035791,� O�� �� sIONAL E��Z I z I 0 J ■ ■ u ■ ■ ■ ■ ■ ■ ®■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ o U) I O z J O Q s s ® s s / —7 w — H ■ / / / I ■ I Lu DITCH ASSOCIATED WITH ICE RINK / CIO ESC PROJECT, CONVEYS OVERLAND FLOW \ 444 / AROUND PROJECT AND INTO 442 / PHASE II EXISTING STORM SEWER 442 P OSE NEw ♦ SEDIMENT - / MITS F � � I ♦ D STURB NCE BASIN 4 � 446 ■ \ EXISTING 13.08 aC. • °D 0 " I ♦ APPROVED SSF PROPED F WIT IRE OF DISTURBANCE AC 446 / G � ♦ / I ♦ / ♦ TS / IX ROW ♦ / �� I D I ♦ PROPOSED / / t �� I I I ♦ --- EXPANDED LIMITS " OF DISTURBANCE cn II� AREA / / ICE RINK PARCEL PROPOSED UNDER I I / SEPARATE SET OF PLANS — cn ■ / — ----- --- 444 o \ Z w p ■ _ I U�I -- I— 1p D D — D � I ® DD PROPOSED -- ■■■■■■■■■■-■■-■ )ADJUSTMENT TO / \ PERIMETER DIVERSION — MWEEMEENE MEN■ ■ �® ■m Da °D C D ° S -5 —� 5 5 °S ,S 5 ° `D°✓ qq2 SSF PROPOSED I / - I W W W W � W SF WITH WIRE W W�W W W� �W W W W W W W W � B C'ING SALAMANDER i i ssF PROPO STREET / % _ — — � BACKING D ° ° D D D D D n D " B 9 ° D 'B D / \ �\ I ��SSI S _dSS _dSS_dSS _dS � S ASS �\ 456 _T' —_yTy ASS o s s_ ® s ®D I ass ass �� I �XISTING / / SS �`' v A ,q38 ss� Cr A I IC s AL APPROVED LIMITS 15 ao ( so � OF DISTURBANCE / I' IIEXISTING \\ KEY 3 PE ILT FENCLTC REMAIN N FEETU 1 in = 30 ft. P - — Cn ® Cy �cy)cy.) � N LL Q � N n/ � LJ� W > Q J J J Q _j > O U)2: ci ® L z O T� O u Q 0 z = W C) i--i 2 tww1. F___ C) y U W Lu V) Lu06 /) 0 u L / Zw J O � W U) W Lu _ Lu 0 Q_ J Q 0 - o N w J W r' a Lu � JOB NO. 182150 SCALE 1 "=30' _ SHEET NO. 9 ■ I I I I I / / / \� _---PROPOSED SF / � I WITH WIRE � I I \ \ L 0 ■ I I I I I I I I �� BACKING ■ I I I I I ' / / I I C y _ / N � I O ■III I I III __--� ,� � / � /� I IIII\ � \ �� �� I I I I y� _ \: �� �o SCOTT R. COLLINS'� PROPOSED TREE PROTECTION \\ I U Lie. No. 035791 FENCING TO BE INSTALLED V \ V 'n ALONG LIMITS OF DISTURBANCE ■ I I I I I I I I I I I _ / / �� LINE TO PROTECT PROPOSED SIONAL E TREELINE � ■ I I I I I I I I I I I I I / / / � / � \ \ \ \. \ N \ A \ MATCHLINE, SEE SHEET 10 7I ■I �Ii�■I i■ili II■Ai, t-' I ■I ■I ■I MEN ,� y ■ I I I I I00�. ■IIII II III I II ,— ,— � ,--- � \ \ I., ,, �� ■I I II III I III ,� �F ss • ■ I I I I I I I I I� /ems ■ ■ I I I I SF ssF ■s��� I I I I J) _ PROPOSED EXPANDED ��IIIII I II ��V \\ \ \ \ \ O ���� ---SUMP AROUND STORM INLET DISTURBANCE mottos PROPOSED UNDER SEPARATE SET LIMITS OF woman o co J J ccl so STING, APPROVED XIS G STORM STRUCTURES \ \ \ \\\, `\ \ U-' 1 A \ \ \ SUP S=-NCE TO F APPROVED WPO PLAN TO REMAIN\ � ---RE EXISTING STORM INLET RECEIVES FLOW FROM \ \ \ \ O W 1 EXISTING DIVERSION \ \ \ \ \ _ / \ D KES AND CONVEYS TO V \� \ \ \ SSF ISTING SEDIMENT 1 / 442 440 � \\ ASIN #4 n � \ SF440 442 - - 1 O — \ r \ \ S ■ \ \ \ O XISTING, APPROVED LIMITS OF \ \ I I I V 1 I � W N DISTURBANCE LINE � � QR4 ♦%♦ \ \ _372� _ e P o � 444 n 446 DD. 1 / \ \ \ \ / 1 JI WETLANDS, P. co D- EXISTING 1 1 1 1 I I I I I I / I O I I y y(D ♦ / o ♦ / APPROVED \ I I I I / ' y y 0) ♦ y yy� Z C z DIVERSION DIKE I \ I I N II II I ��) ❑ yy I ,� � � a o D • ♦ � I I I I � \ _,� % / —/ o �• I I ■ \ \ 1 ICI N N (� // U�1DER \ l l I I \ v� Q z _ ICE RINK PARCEL PROPOSED UNDER ' / / / / / / / / / / \ I . ` > � Z S / I P se SEPARATE SET OF PLANS � � � / / / / / / / � � . � J w � ♦ \ � \ IIII I I � � 11 / / � / � 1 \ • \ �\ t o� ■■■ ■. \ \ III I I I I j I I o I / / \ • \— \ — L ~ T I I I I I I I I o \ • I ,__, z 1 W \ TS EXISTING, \ • \ I \ \ L9 Q O APPROVED \ • J V D C \ I I I I I I I I I SEDIMENT \ \ • \ \ \ La I \ I I I I I I I I I I I I I I \ \\ \ BASIN #4 \ • :. \ Q 1� \ I I I I I I \ \\ \ • z n 1 1 I I I I I \\ \\ \ ZOw \ I I I 11\I \ \ \ \ • � \ � I I II I II I1 \ \\ \\ \ \ ■ 4 — 1 D • � I I 1 1 \ \ \ \ \ \ \ — — \ \ • \ \ w Cn ' �►• I \ \ \ \ \ \ \ \ \ \ \ \ \ L u 06 � e ° to ��� I I I \ \ \ \ \ \ _ -- � _ � � ■ :.r � \ \ ♦ \ � �(nz I / / / /♦� \ \ \ \ \ \ \ \ \ — i y O \ \ w J (n ♦ I / / / �♦ I \ \ \ \ \ \ \ \ \ �i/ ♦ \ w J O i �, J \ \ \\ \ ♦ I \ / I \ 107 w ARAINIS IWAi ■ ssF ssFF ss� / / / / �j �% I \ V� �� I ♦ - w Lr) Z" / I �•L O SSF l / l l / i SSF PROPOSED SALAMANDER / / // I I CD/ / / / / / / s / / \ \ ) o SF WITH LIRE STREETBACKIN J Lu O z GRAPHIC SCALE D 1 I / / / / / / / 380 s V A 0 /O cos No. I / y V`� _ 30 0 15 30 60 120 �--�� -- KEY 182150 / / O SCALE SSF DING rr IN FEET � � -- ROVED SUER _— — �TP EXISTING / 1 inch = 30 ft. \ I I I I l SILT FENCE ---, - -- \_APPROVED TREE ��o \ SHEET N0. \\ ---------- PROTECTION � \ FENCING 10 �H /A�� GRAPHIC SCALE / . \ \� O SCOTT R. COLLINS 30 0 15 30 so io \ \ \ ��\ \ U Lie. No. 035791,1--, I/� % PROPOSE - \ _ / /I TP TREE PROTEC ION ,, \ / \ \ \ — _ — / o \ / \ / FENCING �\ ( IN FEET) \ \ \ \ / / \ �SSIONAL 'F' / 1 inch = 30 ft. \� \ \�S \ \ \ PROPOSED NEW \ \ LIMITS OF A ss DISTURBANCE \ \ASS ASS \ iSS I — \\ \ \ SS PROPOSED -- A V A SF WITH WIRE U�V y BACKINGcn \� (10 �\ a ♦ P6 / �/ cn co in Ln \ / — SF WITH 100 STREAM \ \ L \� — V� V\� PROPOSED LIDS OF Lu ® \ ♦ �� n WIRE BUFFER \ — DISTURBANCE SSFBACKING TYP• I� REAM, TYP. V• \ PROPOSED FLAT VDOT CLASS Al COARSE AGGREGATE � IJ, � OUTLET PROTECTION w/ GEOTEXTILE FILTER FABRIC /� ` ui 0P UNDERLAYMENT. FABRIC TO BE KEYED INTO EX. GROUND 9" \ SS 35S�����V MIN. AT ENDS & ALONG PERIMETER. FABRIC TO OVERLAP A RR Q \ _ 3SS \ ASS V ) MIN. OF 9" L=33', W1=4', W2=15', D=18" MIN. \ \ \ / v A \ A �s� ■�■■■ ■�■■■�■■■�■WAS ■■■i \ \s \ � � \ �• � � \ � - \ � • � � ��SS ASS � �\ � � \� S \ �■ v --- A �� V \ \ \j ■ \ \� V A V \ R SE 8' ASS L \ �■ \ \ \ \ \ \ \ \ \ \ \ DD D RS T CT ♦��I■ ■■■!■■ I I \ \ �� �— o \■ I \ \ \, AL NS E SI E 1 \ \ \\ \ N ■ \ \� \ \ \ \ SL I AI AI D. I■ \ \ \ \ \ \ BE S LL \ \ \ I \ \ \ \ ZE S�BC T \ 1 I �� t x ■�■■�■■■� STEP IN ST . \ 1 I■ \ ■ PROPOSED PHASE II MASS PROPOSED 18" - \\ \ \ \ DD DIVERSION. CONTRACTOR GRADING CO TOURS — SHALL ENSURE POSITIVE SLOPE IS MAINTAINED. SHALL BE \ V / � -r, r STABILIZED AS A FIRST / I \ - - CM STEP IN DISTURBANCE. �. \ ®RA v /� v i N 1 /Xz X CY) 0 CONTRACTOR SHALL INSTALL A \ I -- \ ------ LLN RWD R/W DIVERSION ACROSS THE V � � � � I O \ \ � CONSTRUCTION ENTRANCE. PROPOSED PAVED \ \ \ — \ CE CONSTRUCTION ENTRANCE \ \ \ \ \ \ (12'x70' MIN.) w/ WASH RACK �, / j V Q z \ I & DOWN GRADIENT DIVERSION & SEDIMENT TRAPPING DEVICE Lu C� a_ I ° W W \ - z -�--- --- - \ O �♦ V A\-- _ - z 0 w ° a SED I I I I I •� CONTRACTOR \ ESC \ \ \ PROPOSED STOCKPILE , / / \ W W I I D •. LOCATION OF CRS PARKING & \ PHASE II \ SUSROUNEDIE BY / uj ou I PORTA-POTTIES STAGING AREA \ I ♦♦ \ SEDIMENT - \ E \ / �/ - z (n z I ♦ \ BASIN B 1 \ // JLO OCATION OF 15cy 11.27 aC. V \ \ / C� W (fi \ DUMPSTER \ W I I A i► �I '-' w il ICI � _ i L0 THE FUELING TANK SHALL BE COMPLETELY \ EXISTIN�,�Af�PROVED SEDIMENT TRAP 4C y A V V / \ W ! (DRAINS TO PROPOSED SEDIMENT BASIN B)- - - SURR UN0 < DED BY A 2 DEEP, 2 WIDE EARTHEN BERM / y WITH HEAVY MIL POLYETHYLENE LINING, OR BE �► LOCATION OF PLACED IN AN IMPERVIOUS OPEN -TOP DUMPSTER. S D FUELING AREA / / / / / �j (D � THE PROPOSED BERM OR DUMPSTER SHALL CONTAIN �-- \ / / / �_ � W � � FUEL IN THEE SPILL. CONTRACTOR SHALL U �- — — / / / / Q _71ENSURE VOLUME CAPACI IS 10% LARGER THAN THE - - — \ / rJ M Q MAXIMUM VOLUME OF S ED FUEL. 71 . Lu J°D D° / \ \ ■ MATCHLINE, SEE SHEET 9 KEY SS \ ■ — PROPOSED PHASE II MASS ° D` F ---- ---- — - -- — GRADING CONTOURS Lu r' w JOB NO. 182150 SCALE 1 "=30' SHEET NO. 11 zH �� � � ♦ / \ O � \ \ \ yyyy\y \ O ♦ � \ I I I I / �v °�� / — / O O 0 \ I ^� 6/ / \ I \ 1SCOTT R. COLLINS Z' �j I \ c \ / \ \ \ I I I \ \ \ U Lie. No. 035791,� WO-10 am.a � � — I 1 / \ \ \ \ \ / / / � �► � � I I `\ �SSIONAL Fl�G MAPPED -------- FLOODPLAIN / u TYP. - I GRAPHIC SCALE y y y y\ �n 30 0 15 30 60 120 y y \ C/) / O / / �/ ( IN FEET y y\ y \ \ p O \� \� y \ 1 - - � / � � = �€t. y y yy S \ � Q � 1 inch 30 O � O — \y y \` OI \ UO o y \ y O w 0\ IR M, P. �, — ✓ V — A J — \ y yy \ PRESERVED STEEP SLDPES, P. _ -- — A / v\ v 0 0 y y W — — y / LL 10' WIDE TOP / OF DAM _ y y ELEV.=398' \ ���� — v �� — y A \ O� \ \ yy yy y yy y y \ �co s PROPOSED 175.66' PROPOSED 100' WIDE VDOT CL. AI RIPRAP �/ / / / '— _ — -� \\\ • OF 015" CL. III RCP LINED EMERGENCY SPILLWAY CRESTaalkk � i � \ \y 1.14% w/ VDOT ELEV.=396.75'. SPILLWAY TO HAVE 4:1 �� - �� ASS\ \ \ w rlj o is ss STD. EW-1 _ SIDE SLOPES FOR VEHICULAR r� ss�— �s o s TRANSITION I � ��'� S��SS�� SS>c�s SS \ \ \ ' ` o N - -mma l -�� / v _ s \ _ r v I \ �� � PROPOSED SUPER - � \ - \�\ T FENCENow as \ --- / \ \ O 1 O DA-2.35 AC. \ \ S \ y y y 950 L F SSF \ y � A �.'A1 L.F. / 0.25 AC / � / / / \ \ v \ ss \ _� �� \ — y v s�� / \ L9 v O \ I I O ti r \ \ I M s y , \ y (D 0 s CY) C6 N H� I PROPOSED VDOT STD. B (048" REINFORCED CONCRETE OPENING) \ \ \ \ \ \ \ \cy)TO SERVE AS 048" ESC RISER STRUCTURE. RISER TO INCLUDE ACONCRETE U FOUNDATION &IWASHRACK SPECIFICATIONS. SEE SHEET 13 FOR VDOT STD. B-1 DETAIL & VDOT STD. MH-1 DETAIL FOR THE ESC RISER I 1 s \ \ \ I y y N CONVERSION. ESC RISER RIM ELEV. WITH DEWATERING I I I 1 \ \ I y I d� C:) ORIFICE AT 392.3'. SEDIMENT BASIN CLEANOUT ELEVATION= 390.98'. \ I 1 h I 1 \ \ I N -, WNW PROPOSED 2 WIDE PROTECTIVE SWM BARRIER AROUND THE RISER TO BE I I I I J CONSTRUCTED AT THE TIME OF THE RISER STRUCTURE s CONVERSION TO A > Q \ PERMANENT SWM RISER. E THE SWM PLAN FOR SWM BARRIER DETAILS. I I I I I I I SESw�_j — — — PROPOSED SAFETY FENCE, . INSTALL SIGNS "WARNING I QUICK SAND, KEEP OUT" ~ �� I O I I ' > O Lu I I I I I I I o L90 I' II I I I #1•■in O 1 I I I I \ I I / I I �I .I � 1 0� z� .■,O z s \ I I I I I I w ' � O♦ I � I I I I O I I I I � — _ -LL \ II I 1 I II I ILLI w cn � �..�--� as LI. v v / / I I O I \ 5 O z U) w L w o ----- \ \ / / J I PROPOSED / 1 I I I % I I \ LIMITS OF / 1 I � O � � I I I I 1 \ \ \ C� � DISTURBANCE LL.I / I I 1 I I \ \ Lu 0 Q O \ \ / �� / Q Q I I / / �\ I \ \ oC ■ I I I I I I I I I I I — ROPOSED SF ■ I I I I / O / / / WITH WIRE S, F \ I ■II I I III / / 00 ■ I I I I I I / / BACKINGLu \ \\ I ■I I I I II I II II --,— // �O / / / I I1�1 y / ■ I I I I I I I I I I / / / / / �� PROPOSED TREE PROTECTION I I I \\ \ _ U'-u w ■ I I I I I I — — — _ / / FENCING TO BE INSTALLED ! _\ \ ■ I I I I I I I I I / — / / / �/ ALONG LIMITS OF DISTURBANCE I \� �\ a cn ■ I I I I I I / / / / �� LINE TO PROTECT PROPOSED \ \ \� JOB NO. I / TREELINE \ ■ I I I I I I I I I I I I — // / 182150 ■ I I I I _ — / / / ' / ` \ O \ MA SEE SHEET 10 E \ � � ■ I I I I I I III I I I _ — / / \ \ \ \ SCALE ■ I I I I I I _ / / / i _ — � � I %I I � I I � I I � I I � I � III I I � I I � I �i�l � I � I � I � I � I I� _ 1 =30 ��� to / SHEET NO. ■ I I I I I I III I I I I I // i55� -- \ I \ N 12 ■ I I I I I I issF HO \ O .I Sediment Basin 'B' Design drainage area (acres) 11.27 basin volumes: (using 2' contour intervals) elevation (ft) contour area (sf) volume(cy) 387 786 0.0 388 1,387 39.7 390 3,568 217.0 391 5,310 380.3 392 8,605 635.6 394 13,155 1435.6 396 18,066 2587.1 398 23,607 4126.0 wet storage: wet storage required (cy) (67*DA) dewatering orifice elevation (ft) wet storage provided at this elevation (cy) available volume before cleanout (cy) (34*DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> 1') dry storage: dry storage required (cy) (67*DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of flexible tubing (in) (orifice+2") runoff: C (use 0.45 for bare earth) tc (min) I2yr 5.2 Q 2yr 125yr 7.5 Q 25yr principle spillway: available head (ft) diameter riser (in) spillway capacity, Qp (cfs) diameter trash rack (in) barrel length (ft) head on barrel through embankment (ft) diameter of barrel (in) APPROVED 'WET POND 4' PLAN SCALE 1"=30' APPROVED RIPRAP LINE INLE CHIANNELPROTECTION \ 7 APPROVEDFOREBAY \ \ \ \ \ BOTTOM / ELEV.=360.0' Z� \ \ \ / / // I�� U, / C I I I I I IIQD MANAGED STEEP I I I AP ROVEDIPOWD I SLOPES, TYP. BOTTO E41EV.=358.0' PPR,OV�D 1Q' WIDE SAFETY BENCH RANGING IN ELEVATION BETWEEN 3 636f.20"IPER'IWP� 26''11701037 1I 1 \ \ \ / / I I I \ APPROVED iz' WIDE TOP OF DAM ELEV.=372.0' AP ROVED 10- WIDE AQUATIC BENCH, \ / ANGING IN ELEVATION BETWEEN -�' 3 4.5' I 366' PER WPO'201700037. APPROVED 36' WIDE 1 1 \ \ \ J RIPRAP LINED EMERGENCY SPILLWAY CREST ELEV. 370.20 (WPO 201700037). APPROVED'STM X-02'/DRAINAGE STRUCTURE (RIM=372.20, INV I14=362.80, � INV. OUT=362.70 (LOW -FLOW), INV. APPROVED 'STM X-01' (POND 4 072" RISER) OUT=363.60 (PRIMARY FLOW, 60"). A / RIM=369.80 STRUCTURE TO SPLIT FLOW TO PROVIDE' / INV OUT=363.30 (060" RCP) ADDITIONAL DOWNSTREAM WATER / 06" LOW -FLOW ORIFICE INV.- -366.00 QUALITY TREATMENT. SEE WPO / (TO BE REPLACED WITH NEW 03 ORIFICE, INV.=366.00) 201700037 FOR DETAILS. / 09" MID -FLOW ORIFICE INV.=367.25 (TO BE REPLACED WITH NEW 08" ORIFICE, INV.=368.75) 00 / I I \ / 1 GREENWAY,- TYP. �STRE \ Y I TYP. APPROVED 69.11' OF 060" RCP AT1.59%WITH CONCRETE -� CRADLE TO SERVE AS WET POND 4's BARREL (WPO 201700037). �/\ / / APPROVED 30' LONG CLASS I I RIP -RAP OUTLET PROTECTION / UNDER WPO 201700037. APPROVED VDOT STD. ES-1 UNDER WPO 201700037. n OD I / j w DESIGN HIGH WATER (25-YR. STORM ELEV.) MIN. V WI SPILLWAY CREST OF EMERGENCY 2' WITHOUT SPILLWAY kRISER CREST WATERI NGICE 755 design high water 396.66 392.30 top of dam (ft) 398.00 755 top width of dam (ft) 10.0 383 bottom of basin (ft) 387.0 390.98 approx. bottom dimensions: 87'x36' 1.3 upstream face slope: 5:1 downstream face slope: 3:1 755 baffles: NO 395.66 length of flow, L (ft) 215 1610 effective width, We (ft) 80-01395 8.0 L / We (baffles required if < 2) 2.7 10.0 collars: YES depth of water at spillway crest (ft) 9.66 0.45 slope of upstream face (Z:1) 5 5 slope of barrel (Sb) 1.14% 26.4 length of barrel in saturated zone (Ls) 91.09 41.8 number collars required 2 dimension of permanent collars 6.6'x6.6' 1.00 emergency spillway: YES 48 required capacity (Q25-0p) (cfs) 0.0 40.0 bottom width (ft) 100 72 slope of exist channel (%) 1.4% 175.66 minimun length of exit channel (ft) 48 10.7 crest of spillway (ft) 396.66 15 9-1. B-2 PROPOSED LEVEL II 'WET POND B' DETAIL SCALE 1"=30' I I I O PROPOS;ED FLAT VDOT CLASS Al COARSE AGGREGATE OUTLET / \ PROTECTION w/ GEOTEXTILE FILTER FABRIC I UNDERLAYME T. FABRIC TO BE KEYED INTO EX. GROUND 9" MIN. AT ENDS ALONG PERIMETER. FABRIC TO OVERLAP A MIN. OF 9" (L=33', \ W1=4', W2=15', D=18"MIN.)', 1 �c_? ITS 0 TREAR -TYP. j\ CD i� Z.. •. 110' WIDE TOP OF DAM ELEV.=398' � - o PROPOSED 175.66' OF 015" CL. III RCP @ 1.14% w/ VDOT STD. EW 1 co I \ A G S E 11 � wEER HOLE [AS ;?EoID 1 STEPS (AS REQ'D_: iR I L, Lu 1 _ Lq w o LEI: W STEPS !fAS REWDA r r 4 I I ■ 6" W5,5 x V5,5 WELDED WIRE FABRIC OR EQUIVALENT AREA MONOLITHIC 7 4" FOOTING D+8"+2)( J F' DOGHOUSE WITH FOOTING (VOTES: 1. SEE GENERAL 44TE5 FOR ADD ITIONfLL IWORMATION ON WEE IF HOLE5,57F-= 7ELIUIrEUENT5, "H" [LIN. FT. FOR WANHOLESI DZEINSIONS, ETC. 2. ALL BASE UNITS ARE TO BE IN ACCORDANCE WITH THE RE01,, CEMENTS OF AASHTO M195. �3- CONCRETE SHALL BE 400Q PSI. 4 WHEIE OPENINGS ARE REQUIRED FOR PIPE.THEv SHALL E1E FORMED, DRILLED. OR NEATLY CUT AS AJPPOVED B1' THE ENGINEER, THE CONTPACTOR SHALL FURNISH THE PjaPICATOR WITH THE ANGLES BETWEE1J CENTER LINES, THE INVERT ELEvATIONS. A U THE SIZE OF ALL PIPES TO ENTE4 THE MnAHOLE. HOLES PRE TO BE A MINIM4,N OF 4" TO A MAXIMUM OF 8" LARiGER THAN THE vUT51DE DIAVETER 4F THE PROPOSED FIFE, 5. DIMENSIONS SHOWN ARE MINIMUM. ACTUAL DIMENSIONS MAY VARY WITH MANUFACTURER. 6- "Di" 15 W )MINAL ()IAMETER_ 7, IN THE EVENT THE INVERT OF THE QUTFALL PIPE 15 HIGHER THAN THE BOTTOM OF THE STIRUGTUrRE. THE INVERT OF THE STRUCTURE SHALL BE SHAPED WITH CEMEWr MORTAR TO PREVENT STANDING OR 1PONDING OF WATER IN THE STRUCTURE, S. TONGUE AND GROOVE JOINT APE TO 9E OF FAORICATOR'S QE51611 MEETING VOOT APPROVAL_ HOLE U5 REQ'P,] 1 �n �Lj . J La O zi PROPOSED 100' WIDE VDOT CL. Al RIPRAP LINED f \ \ EMERGENCY SPILLWAY CREST ELEV.=396.66'. s 1 ^ 'SP,LLLWAY TO HAVE 4:1 SIDE SLOPES FOR VEHICULAR � \ ��• � V � �' � � � TRANSITIONS. 1 �< V� 3 � , ,q a_ SS 4-ASS --_- iss --�\ -- \---�--- -- ALTERNATE JOINT DETAL DIMENSIONS D X MININUM Y WIP41MUM SWO17=10 YAK- PIPE SIZE A15❑LUTE VAxI1Al,V yf �k 361, a" 6" 1 ' 2" 48" 511. 16„ 24" 27'' 60" O,. a„ 3b 4211 72" F?" in„ 54 ° 7" a., gyp„ M.. 96" 8,. all 66.. 721, 10811 gI I all 7811 1201, 1011 611 9011 1291, 1O all 96.. 144" 12" 8" lj$" JOINTS ARE TO BE SEALED WITH MORTAR, 0-RINI0 CASKETS, OR BUTTL RU60ER, 44 UEPTH "H" OF -36" VIAMETER RASE UNIT RESTRICTE4 TO 4'-0" MAXIMIUM. ONE THROUGH PIPE ON11-1 (ONE PIPE ENTERING AND ONE PIPE EXITING STRUCTURE) DOT A COPY OF THE ORIGINAL $EALED ANND SfiiNED VIRAVYIING IS ON FILE* IN THE C'EIN�TRI,ALL OFFICE- ;,I'E, 11`1; -TK;'. EO�AD AND BRIDGE STANDARDS STANDARD PRECAST BASE E U I V I I EFE ;E' I: E ..HEFT 1 OF 1 REVISION DATE YIR^In IA DEPARTwEwT cF TR+d+4STATI4N ;- 3 103-11 O8f 17 .-�. PROPOSED VDOT STD. B-1 (048" REINFORCED CONCRETE OPENING) TO SERVE AS 048" ESC RISER STRUCTURE. RISER TO INCLUDE A CONCRETE \ FOUNDATION & TRASHRACK. SEE SWM DETAIL SHEET FOR FOUNDATION & TRASHRACK SPECIFICATIONS. SEE i THIS SHEET FOR VDOT STD. B-1 DETAIL & VDOT STD. MH-1 DETAIL FOR THE ESC RISER CONVERSION. ESC RISER RIM ELEV.=395.66' WITH DEWATERING ORIFICE �AT 392.3'. SEDIMENT BASIN CLEANOUT ELEV.= 390.98'. PROPOSED 2' WIDE PROTECTIVE SWM BARRIER AROUND THE RISER TO BE CONSTRUCTED AT THE TIME OF THE RISER STRUCTURE'S CONVERSION TO A PERMANENT SWM RISER. SEE THE SWM PLAN FOR SWM BARRIER DETAILS. PROPOSED SAFETY FENCE, INSTALL SIGNS "WARNING QUICK SAND, KEEP OUT" _ SEE ETA.NDARAD 13L-1 FOR APPLICABILITY OF SAFETY SLABS. 5TAP,D1147 MII 1 NOTE! FRP4.1F & S :F'rF3 THE TOP OF MASONR'~' IS TO BE LEFT SUFFICIENTLY LOW TO PERWIr PROPER ADJUSTMEMT OF C'DVER AND FRAME TO CRCADE BY THE USE DF MORTAR OR BRICK A5 DIRECTED BY THE ENGINEER. a �U w Po FLAT SLAB TOP AS RETAILED ON STANDARD T-MN-1 MAY By .. SUEISTITUTE❑ FOR TAPER10 SECTION WHEN APPROVED BY - THE ENGINEER_ ST'p- ST-1 ' *2" 6^ ,4A C.W.. -.. w 4 "k BEVEL 4S' OW 'r �i961f/lVA M�� PSII1= :®cry Miiiiiiiiiiiiiim�� 1MIIIIIIIIIIIIMM■ r ram*_wxrw M===M . . !'�9li�'�S 1����■ OW..e+ AV,1MMM ■ HALF PLAN VIEW WHO I HALF SECTION A -A (1111TH FRAME AND COVER REMOVED) BRICK CONCRETE NOTES: 1. CYUANTITIES 5HDWN ARE FOR MANHOLE YeITHQQT PIPES. THE AMOUNT I)ISPLACEQ BY PIPES MUST BE DEOUCTE❑ TO TABLE OF QUANTITIES DEPTH BRICK MANHOLE CCNCRETE MANHOLE 6RI Ok CONCRETE CONCRETE =EIET THOUSANDS CU. YARDS CU-WARDS + 0.5 4.70 1.437 5 0.7 0.785 1 1.599 fi 0.9 0.785 1.961 7 1.0 0.765 2.223 a 1.2 0.765 2,40S 9 1.4 0-755 2.747 10 1_6 0.755 J.D013 11 1_$ 4.9i4 �.455 17 2.2 0-970 3.017 19 2.3 0-970 4-179 14 2,8 0-970 4.541 I� 3A 0_910 4.90.3 1$ 3-4 1 4.974 1 5,265 17 1 4.0 1 "_•73 6.032 INGREMEHT 4-4� 08TA" TRUE OUAHTITIES. 2. A BASE THICKNESS DF 911 WAS USED IN COMPUTING CONCRETE QUANTITIES- 3,INCREMEN15 TD BE ADDED FOR EAGH ADDITIONAL FOOT OF DEPTH- 4. MATERIALS MAY BE BRICK- CONCRETE C4 APPROVED CONCRETE MANHOLE 61-4CK. 5. IF BLOCKS ARE L15EO THE M NI%' V THICKNESS OF SAME IS TO B- OTHER THICKNESSES ARE TO CC:AFC'RH TO WALL THICKNESS SHOWN FOR CONCRETE_ 6.l+LL CONCRETE TO BE CLPSS A3. 7. WHEN SPEGIFIED ON P-LANS THE INVERT IS TD BE SHAPED IN ACCORDANCE W ' I I "TANGAR❑ IS-1- THE COST ^ =JPN THING AND PLACING ALL uATE.Ri;,L`,i '4(:ULh1AL ro THE SHAPING IS Tf' RF _NCLUDED IN THE BIC PRICE FOR -'IL S'RUCTLIRE- SPECIFICATION REFERENCE MANHOLE FOR 1 " - 48" PIPE CULVERTS ROAD AND EIRIDGE STANDARDS 3132 VIRGINIft DEPARTMENT DF TRANSPORTATION REVISION DATE SHEET 1 4F 5 146 -41 2D16 ROAD & BRIDGE STANDARDS SCOTT R. COLLINS'� U Lie. No. 035791 � �0�wks__IONAL z O J a ZU � w CIO in U) OJ ozQ �■■� in Z z w H W W 0 00 CY) �CY)IMIL cy.) C) LLN WN(D N LLi L11 > J < J W W O z z w OLLI V LU LU U Q LU 2 �� U) v J u--I j LU NWN O IIIIIIIIIJ WN Ld_ O 0 0 N w J w 0 w a � JOB NO. 182150 SCALE AS SHOWN SHEET NO. 13 �-- — "� 1 \� °= PRE- AND POST -DEVELOPMENT SUBAREA AND OUTFALL SUMMARIES \ yy A :. vTH o� S _ IIII I I I I I Pre-Dev. Subarea Post-Dev. Subarea Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 cV (Point of Interest) (Point of Interest) Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection ' \ �� I I II III 41 �/� \ �-� - - - \ \ O 1THIS PORTION OF STELLA LANE IS COTT TREATED UNDER WPO 201 THIS 00 [] r- 8008e s U Lic. No. 035791 1 I I I II� PLAN IS CURRENTLY UNDER REVIEW AND O J I 1 III I I IIII NO MODIFICATIONS ARE PROPOSED T= - THIS AREA &ITS TREATMENT. � � LL ITHIS AREA (BLOCK 4B) RECEIVES STORMWATERQUANTITY J QUALITY TREATMENT UNDER APPROVED WPO D20 800051. NO MODIFICATIONS ARE PROPOSED TO THIS AREA & ITS STORMWATER QUANTITY TREATMENT. THE I I I WATER QUALITY TREATMENT WILL BE SLIGHTLY � IMPACTED WITH THE REMOVAL OF LS-1 � � V� 1 I � I IIII 0 I II 1 1 Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.a (10-yr Peak Flow is Confined within pond) Section C.3.c (Outfalls to mapped Floodplain) 2 2 Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C. (10-yr. Post Flow < Pre Flow) N/A (10-yr. Post Flow < Pre Flow Satisified) O� 9 I F G MAPPED FLOODPLAIN, Do r _ o PROPOSED CONCENTRATED- _— _\\ sty OUTFACE #2 TO POI #2 O \ 17 1 OI #2/p o .. owl \ / I 100' OF OLF w� ELEV.=1.5' � / �I � � /�� \ � � � � � �' � _ _ '� �4�g j 160' OF CONC. FLOW w/ ELEV.=2' 425' OF CHANNEL FLOW 0 J V00 U PRO D �� OO ° LU m PRE-DEV. LOCATION OF PROPOSED �- �- ET P ND ' WET POND B' TO REPLACE Z Q SUBAREA B .i -- _ _ ° 0 7.20 ac. � � UPSTREAM ST-4C ��� � � � � � � � r - �- �z � � Z Tc=0.27 hrs. ( �����LU PROPOSED EXPANSION OFCC THE APPROVED LIMITS OF APPROVED �/ �� / OO DISTURBANCE UNDER WPO ST-4C 201700037, AMENDMENT #1 00 /i, _ LU// L—o� . NOTE: DAPPROVED 0 IVERSION � � � � I II I II /� �/ � 0 � \ THIS PLAN PROPOSES TREATMENT-- REATMENT THE LIMITS OF DISTURBANCE ASSOCIATED WITH THE FUTURE � FOR THE FUTURE DEVELOPMENT �� I I� I I // �, TOWN CENTER, APPROVED BLOCK 5 &APPROVED SALAMANDER OF THE TOWN CENTER. I I / / O \\ 1 I i STREET= 35.98 acres. THIS AREA COVERS THE REQUIRED HAUL \ \ 1 ROADS, BUT EXCLUDES BLOCKS 8A, 8B & 4A SINCE THESE AREAS RECEIVE WATER QUALITY TREATMENT UNDER SEPARATE VSMP ) / PLANS. THIS 35.98 ac. LIMITS OF DISTURBANCE BOUNDARY OO DEFINES THE VRRM BOUNDARY FOR WATER QUALITY` REQUIREMENTS ASSOCIATED WITH THIS PLAN (i.e. THE FUTURE TOWN CENTER, BLOCK 5 & SALAMANDER STREET). APPROVED LIMITS OF 454 „ . - OOO 0 STURBANCE UNDER WPO 201700037, AMENDMENT #1 — - - -----/ C:) LU 100' OF OLF w/ A EL =1.5 WETLANDS, /� \ 950' OF CONC. FLOW w/ A LEV. 10'`� ��e OF CHANNEL FLOW DOWN THE E lIBANKMENT � ERENNIAL �STREAM, TYp , i 1 I03 I I I PRE DEV. I _ © m SUBAREA aa I I I I/ I I \ G �- A� �� �� III II p I ■ ��I I II i I n I 8 I I SOUTHERN & WESTERN PERIMETERS CN=60 I I I I I I 00\ \�� 1 1 II I III OF SUBAREAS A & B ARE DEFINED Tc=0.41 hrs.�� VI BY APPROVED WPO 201900004. I \L■'` ��`�\ aA ������� II II I /� M / � �, ...:..... .. _�: / / �/ \ \\ �_ �/ � � �\'NJ \ \\�� .'L;..... �� _.....� \ \\ \ 398 ^� I / /� /� � I I I \ I I � — ii� ����� �� v y v�� ���� , �i�// J IIII 11 ` I �� I I V I77W - �i o A\ J I I Z IF— \�THI� co w R�U \ \\ S AREA (BLOCK4A) RECEIVES STORMWATER A�� �\�vo��1�a 1 I I IIII I I III III ;I — -- �w Y \NQUANTITY AND QUALITY TREATMENT UNDER APPROVED WPO 201800051. NO MODIFICATIONS ARE PROPOSED TO THIS AREA & ITS X STORMWATER QUANTITY TREATMENT.T WATER QUALITY TREATMENT WILL BE SLIY QIPROPERTY IMPACTED WITH THE REMOVAL OF LSGHT0I#1 LIMITS, TYP. Z0 ::-.�.�: _ N APPROV D POND 4 \ �� \ \� O �8 o �� �w _ -- a, I 3g2 CONCENTRATED �� �A A '` ®� OO �\ \ 111 �— z OUTFALL TO POI #1 �� Oa u �� o V / I I ®. \ �� N I 11 II I I I \ \ ■ - / / �/ I �/ \ _ �\ W N LU I � I IIIII � \ � �■ � � ; � __ � � � / / / I I �' I � / � 11 � I � w� � a� �\ � � �-:::y�� � � y � � � I � ,,:�::�=�=� �� � � � �� : = Q � III LU I 1 \ I MANAGED STEEP SL�vO�P�\ES,T\�YP. ��` `'�'o\�p ���S\L.2O, P�ES, T—YP. v�\w vv���\�� g�\�� ;, �� �����y.� �\\� � \ I�, � \�.... , Co�° o Io ����oA� v\\ ? o \� f ��o o s(pJI IF�j)I- V—o � a��1�� ��i/•':N ��:�a.::: : 1/ ���—�����vDo�— O�o �i� J61 ' i— L>�U PRESERVED STEEP �7^ O40(4 / /)) \ .l GREENW TYP_ AY, THIS AREA (BLOCK 8A) RECEIVES STORMWATER LUQQNL.� QUANTITY AND QUALITY TREATMENT UNDER°00°34 s O °O APPROARDD PROPOSED TOWPO OTHIS AREAD& IFICAITSTIONS -� ti \ \ \ Oo �� L9 STORMWATER QUANTITY TREATMENT. THE WATER QUALITY TREATMENT WILL BE SLIGHTLY III I I II \V-�a1 IMPACTED WITH THE REMOVAL OF LS 11. j 4u' I I I �� \ _ O� / � \ � � I,,, � \ ��� A �\ � -vim 4_� ,r THIS AREA (BLOCK 8B) STORMWATER QUANTITY AND X �� _� ��� ' �� �� �—� LU QUALITY TREATMENT UNDER Gam'% L APPROVED WPO 201800080. NO ��A ��/ F 6� o �� MODIFICATIONS ARE PROPOSED ������� �� ����� O v� _ Uj 9 _4Qo TO THIS AREA & ITS TREATMENT. ��—��� 1 v LU Ul �- III 11 V� I � � — — �\ �/i i� \� �� Lu J �� I \ — W 6 \�� �, � � // � � j \ � PN :. _ H oA\� _° / w�o�� ��% �� L� u) Z w A �� ''� III II \ II ��� � ���_ ��1 �' �- �_ — — = 8T = _ /®� �� r �,, III 1 II I � � ■ — �'') � I 1 \� I I I I I �' �.� �' ,. � I � � � � � � �� � � — _ ,, / �� � �� w 1 PRE -DEVELOPMENT SWM NOTES: LU 1. APPROVED POND 4 PROVIDES SWM TREATMENT FOR BOTH THE TOWN - I puNa� / CENTER (CONCEPTUALLY SHOWN ON THE NEXT SHEET) AND THE APPROVED BLOCK 5 &SALAMANDER STREET SHOWN ON THIS SHEET (WPO 201800050). 2. APPROVED 'POND 4' WAS OVER DESIGNED FOR ITS WATERSHED (WHICH p ILL INCLUDES BLOCK 5 & SALAMANDER STREET) SO THAT IT COULD ALLOW FOR 0 O FUTURE DEVELOPMENT TO DRAIN TO IT. THIS PLAN SIMPLY CONFIRMS APPROVED 'POND 4' CAN ADEQUATELY HANDLE THE ADDITIONAL FUTURE 1\ LU TOWN CENTER CONCEPTUALLY SHOWN ON THE NEXT SHEET. 3. BECAUSE APPROVED 'POND 4' TREATS THE FUTURE TOWN CENTER BLOCK 5 & I EVEL SPREADER (LS-11) ORIGINALLY APPROVED UNDER � W �c �WP0 201700037 AND REVISED WITH WPO 201800013. \ / \ \_/ lU S SALAMANDER STREET, THERE ARE NO PRE -DEVELOPMENT IMPERVIOUS AREAS DRAINING TO APPROVED 'POND 4' IN THIS PLAN's PRE -DEVELOPMENT ANALYSIS. THE IMPERVIOUS AREAS SHOWN ON THIS SHEET DEPICT THE APPROVED PLANS, BUT ARE CONSERVATIVELY NOT TABULATED IN THE PRE -DEVELOPMENT ANALYSIS OF SUBAREAS A & B. SUBAREAS A & B WERE ANALYZED WITH A 25% WOODS & 75% GRASS LAND COVER TO REFLECT PRE -CONSTRUCTION GROUND COVERS. 4. SUBAREAS A & B WERE USED IN THIS PLAN's CHANNEL & FLOOD PROTECTION ANALYSES FOR THE FUTURE TOWN CENTER, APPROVED BLOCK 5 & APPROVED SALAMANDER STREET. LU w JOB NO. 182150 I SCALE 1 =120I SHEET NO. 14 4^ II \ II I I --28 16 411 41 \ �� I I II \• ash , ' THIS PORTION OF STELLA LANE IE \ � I -� TREATED UNDER WPO 201800086. THIS � � �A� PLAN IS CURRENTLY UNDER REVIEW AND NO MODIFICATIONS ARE PROPOSED TO -� J II I I III ��- �, THIS AREA &ITS TREATMENT. !!1 I \ ITHIS AREA (BLOCK 4B) RECEIVES STORMWATER J QUANTITY AND QUALITY TREATMENT UNDER I II APPROVED WPO 201800051. NO MODIFICATIONS ARE PROPOSED TO THIS AREA &ITS I I I VASTORMWATER QUANTITY TREATMENT. THE WATER QUALITY TREATMENT WILL BE SLIGHTLY IMPACTED WITH THE REMOVAL OF LS-1 1. Al/ 50 - _\l - I f` � I IIII 4' --- �� 454 \ l lI I I Ih 11 I I V / I r II III I ._ IIII �� 11 �I THIS AREA (BLOCK 4A) RECEIVES STORMWATER III III \ \ QUANTITY AND QUALITY TREATMENT UNDER APPROVED WPO 201800051. NO MODIFICATIONS I I I I II 1 ARE PROPOSED TO THIS AREA & ITS WATER QUALITY TREATMENT WILL BE SLIGHTLY IIII \I II I I��I Irr m II I IMPACTED WITH THE REMOVAL OF LS-11. � I 1. � � III 111 II � I IIIII \ \ ■'� I III III I III I Jill, I I� \\\� 1 9.�, I I v� ■ � - / % �' II��\ II I \\ \III I \v III THIS AREA (BLOCK 8A) RECEIVES STORMWATER QUANTITY AN D WPOD QUALITY TREATMENT UNDER APPROVED NO MO IF CATIONS III �� II II ARE PROPOSED TO THIS AREA & ITS STORMWATER QUANTITY TREATMENT. THE WATER QUALITY TREATMENT WILL BE SLIGHTLY IMPACTED WITH THE REMOVAL OF LS-11. \y y 432 e 0 0 �4° •,a�.���� 7 - �\ w o, 1 0 � \ ,l APPROVED LS-11 (NOT YET I CONSTRUCTED) IS PROPOSED TO BE \ \\\\ I✓ JI II \ REMOVED WITH THIS PLAN. SEE THE I / I STORMWATER MANAGEMENT NARRATIVE: ".:...:.::.. z OVERVIEW: THIS PROJECT IS PART OF THE BROOKHILL DEVELOPMENT, AND STORMWATER TREATMENT IS / / PROVIDED TO MITIGATE THE IMPACTS FROM THE PROJECTS PROPOSED AND FUTURE IMPROVEMENTS ��� THE STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB SWM REQUIREMENTS. �1 THIS PLAN MEETS TWO PRIMARY OBJECTIVES. THIS PLAN PROPOSES TO PROVIDE STORMWATER Sc�TT R. cOLLINs� o �- QUALITY AND QUANTITY TREATMENT FOR THE FUTURE DEVELOPMENT OF THE TOWN CENTER, AS WELL AS TO PROPOSE THE REMOVAL OF AN APPROVED LEVEL SPREADER (LS-11) THAT HAS NOT BEEN Lie. NO. 035791, � \ o I �' CONSTRUCTED. AT THE TIME OF LS-11's APPROVAL, THE FINAL LAYOUT OF BROOKHILL WAS UNCERTAIN. HOWEVER NOW THAT IT IS MORE ACCURATELY DEFINED AND THE UPLAND AREAS ARE PREDOMINANTLY TREATED WITH MORE RECENTLY APPROVED SWM FACILITIES, ITS NEED HAS DIMINISHED. ALSO THE INSTALLATION OF A LEVEL SPREADER THAT RECEIVES BYPASSED RUNOFF A\\ \\ A �� _ A \ \\ \ FROM A PERENNIAL STREAM IS NOT IDEAL. THIS CONFIGURATION WILL BE DIFFICULT TO INSTALL AND - MAPPED FLOODPLAIN, WILL LIKELY RESULT IN CONTINUED MAINTENANCE CHALLENGES WITH FREQUENT WASHOUTS. TYP. WATER QUALITY SUMMARY IT IS ENVISIONED THAT THE FUTURE TOWN CENTER WHICH IS CONCEPTUALLY SHOWN ON THIS PLAN WILL GENERATE A REQUIRED PHOSPHOROUS REMOVAL RATE F 29.94 I . THIS PHOSPHOROUS �a -� PROPOSED CONCENTRATED o s E U0 bs r 0 - _ 1 Q/ Y -__ ,. �. � � \ \ 1 \ \ � LOADING WILL BE MITIGATED VIA THREE BEST MANAGEMENT PRACTICES. THE APPROVED POND 4 AND OUTFALL #2 TO POI #2 \ \ \ �� - : •, \ \ \ \ I \�� ITS LEVEL SPREADER HAVE BEEN EVALUATED WITH THIS PLAN's CURRENT/CONCEPTUAL TOWN CENTER . __� \ \ \ 1 AND HAVE BEEN CONFIRMED TO BE ADEQUATE. THE APPROVED POND 4 AND ITS LEVEL SPREADER 01 #2WILL REMOVE 25.70 Ibs/yr OF PHOSPHOROUS. ALSO, A NEW LEVEL II 'WET POND B' WILL REMOVE AN 1 ADDITIONAL 8.53 Ibs/yr OF PHOSPHOROUS. THIS WILL GENERATE A PHOSPHOROUS CREDIT OF 4.29 Ibs/Yr (25.70+8.53-29.94). o ER, THIS IONAL n IN ADDITION TO THE AFOREMENTIONED FUTURE TOWN CENT IS PLAN REQUIRES ADDITIONAL _ SUBAREA B�, _ A V \ PHOSPHOROUS REMOVAL FROM THE ELIMINATION OF THE LEVEL SPREADER, LSQ--11. PER THE APPROVED WPO PLANS ANALYZING LS-11, A PHOSPHOROUS DEFICIT OF 2.21 Ibs/yr. IS GENERATED FROM THE REMOVAL OF LEVEL SPREADER LS-11. 0' OF OLF wl A ELEV.=14' \ z 30' OF CHANNEL FLOW DOWN \, A `� IN TOTAL, THIS PLAN MEETS MINIMUM WATER QUALITY REQUIREMENTS WITH A SURPLUS OF 2.08 O o Q O i � THE EMBANKMENT A �l �����! Ibs/ r PHOSPHOROUS 4.29-2.21 . THIS 2.08 Ibs/ r PHOSPHOROUS CREDIT WILL BE APPLIED TO .- % -■•., �;;� /;,; , ul BLOCKS 9-11 CURRENTLY UNDER REVIEW (WP0201800086), WHERE ITS BLOCK 11 IS LOCATED Cr I � I � I i 7 �� �, / � ��'"� � � � � ° IMMEDIATELY ADJACENT TO THIS PLAN's WET POND 'B'. � w � v �, o Z) WATER QUANTITY SUMMARY \ sU J o THE PROPOSED IMPACTS ASSOCIATED WITH THE FUTURE TOWN CENTER ARE TREATED THROUGH THE O O Q o Ii �o ATTENUATION IN WET PONDS. APPROVED 'POND 4' TREATS SUBAREA 'A' AND 'WET POND B' TREATS U \ N-9 _ a SUBAREA 'B'. BOTH SWM FACILITIES HAVE CONCENTRATED OUTFACES, WHICH ESTABLISHES THE > POINTS OF INTEREST (POI). APPROVED 'POND 4' DRAINS TO POI #1 AND 'WET POND B' DRAINS TO POI w / PROPOSED EXPANSION OF (A � �` �j `-. � ,"' ^/` � � ° THE APPROVED LIMITS OF #2. CHANNEL PROTECTION COMPLIANCE IS MET FOR POI #1 &POI #2 VIA 9VAC25-870-66, DISTURBANCE UNDER WOO SUBSECTION B.3.a (i.e. THE ENERGY BALANCE CALCULATIONS). FLOOD PROTECTION FOR POI #1 IS �. ,,. 201700037, AMENDMENT #1 MET VIA 9VAC25-870-66, SUBSECTION C.2.a WITH A LIMITS OF ANALYSIS SET BY SUBSECTION C.3.c �� o(i.e. APPROVED POND 4 CONTAINS THE 10-YEAR DESIGN STORM AND ADEQUATELY RELEASES THE �' RUNOFF THROUGH MANMADE PIPES & RIPRAP TO A MAPPED FLOODPLAIN). FLOOD PROTECTION FOR W ' POI #2 IS MET VIA 9VAC25-870-66, SUBSECTION C.2.b (i.e. WET POND B RELEASES A 10-yr _ \\ h - - - - - POST -DEVELOPMENT FLOW LESS THAN THE 10-yr PRE -DEVELOPMENT FLOW). � v � NOTE: THE LIMITS OF DISTURBANCE ASSOCIATED WITH THE FUTURE TOWN CENTER APPROVED BLOCK 5 &APPROVED SALAMANDER FROM STORMWATER QUANTITY TANDP INT THE REMOVAL F LEVEL SPREADER L -11 DOES NOT as I r s ER O 0 U S 0 0 O S S O S O Q , STREET= 35.98 acres. THIS AREA COVERS THE REQUIRED HAUL IMPACT ANY OF THE APPROVED WPO PLANS ANALYZING LS-11. CHANNEL AND FLOOD PROTECTION I �1 I I ROADS BUT EXCLUDES BLOCKS A B 4 / I O 8 8& A SINCE THESE AREAS I \ COMPLIANCE FOR LS 11's AREAS HAVE ALWAYS BEEN MET SEPARATE FROM THE LEVEL SPREADER IN RECEIVE WATER QUALITY TREATMENT UNDER SEPARATE RY THE APPROVED WPO PLANS. IN ACCORDANCE WITH THE MOST RECENT APPROVED WPO 201900004's PLANS. THIS 35.98 ac. LIMITS OF DISTURBANCE BOUNDARY DEFINES THE VRRM BOUNDARY FOR WATER QUALITY SHEET C-901, CHANNEL PROTECTION IS MET FOR LS-11's AREA (POI-11) VIA 9VAC25-870-66, SECTION REQUIREMENTS ASSOCIATED WITH THIS PLAN (i.e. THE FUTURE B.3.a (i.e. THE ENERGY BALANCE CALCULATION) AND FLOOD PROTECTION IS MET VIA 9VAC25-870-66, TOWN CENTER, BLOCK 5 & SALAMANDER STREET). SECTIONS C.1 & C.3.c (i.e. RUNOFF IS ADEQUATELY CONVEYED THROUGH THE STORM SEWER APPROVED \� o o� 7 NETWORK TO A MAPPED FLOODPLAIN). THEREFORE THERE ARE NO PROPOSED STORM WATER QUANTITY DISTURBANCE LIMITSUNDEF CHANGES, OR ADDITIONAL REQUIREMENTS, ASSOCIATED WITH THE REMOVAL OF LS-11 . POST-DEV. / Oo 0 201700037, AMENDMENT #1 _ _ p - W N SUBAREA A �� OO� �I _) 17.04 ac. / I� �� J Q tD CN=86 WETLANDS, c Tc=0.10 hrs. A O P I I N . I II' I I \ �� STREAM L A \ -� a' \ I II IIIIIII� I ��1�11 11 11 I II �0 SOUTHERN &WESTERN PERIMETERS I I III II ° 00 SOT A &BARE DEFINED \� I V I I I I I BY APPROVED WPO 201900004. 100' OF OLF w/ A ELEV.=22' , L9 145' OF CHANNEL FLOW DOWN I l THE EMBANKMENT\_ / ..-.. \ \\ Al! 11! JL! 1! 1! 1! 1 j� L! L! L! L! 1! L11 � ". � �� I NX� \ \ \ I I \ __: � �/ / ♦ y I7 t. Z _:...... ... '/ \// /� • ■ ■ IIIII, � IIIII, � • � £ � � i .1 �y�/) . �. � 1 � \ 39P � � � I �, w •' � w w w / � / / / // i i i � \ � / � � , " Oo � I � � � � � I I I � I V I \ PROPERTY LIMITS, TYP• \ \ \ 0 392 CONCENTRATED �� \\\ A '` ®� �, �_ \-- OUTFACE TO POI #1 o / I :: ® \ \\ - _ N LzLj MAN SLOPES, TYP.P� i . / / I PRESERVED STEEP \ \� O \\ / \ \ I � `���\ o ,� � ; �".\✓::'r � \ ��� / �f �� � _ Q z SLOPES, TYP. Oo �� J 'W o GREEN WAY, I i \ TYP. w o-LLI sL9ue Q -- z 39 y U Ln THIS AREA (BLOCK86) RECEIVES �� \ �\ \\\ A \\� / \ ����_v�� U STORM WATER QUANTITY AND \ \ \ - ��QUALITY TREATMENT UNDER�JA� 3 APPROVED WPO 201800080. NO \ �_ \ / MODIFICATIONS ARE PROPOSED /6 W AREA &ITS TREATMENT. � � w O III ,�� J C LLI Post -Development Impervious Area Summary LU Subarea A LU 0 �oLo G ouNa� / \ , Roads & Parking Lots 277,975 sf 0 Buildings 163,225 sf J Q O 0- Sidewalks 59,875 sf •. ,. o 0 o e a \/ %/% 501,075 sf O , o o o e� ��� , � III N 00 Post -Development Impervious Area Summary LU Subarea B � WATERSHED SUMMARY FOR SUBAREA A Roads &Parking Lots 140,225 sf Buildings &Pool Area 69,475 sf L w Area, 1-year Flow, 2-year Flow, 10-year Flow, o w CN Sidewalks 5,975 sf _ ac. cfs cfs cfs DA A (Pre-Dev.) 60 16.25 2.83 6.07 20.62 215,675 sf JOB No. DA A (Po st-Dev.) 86 17.04 0.34 2.17 54.09 182150 ,7 j i Overall Acreage Summary \\ II I I I SWM NARRATIVE ON THIS SHEET FOR ADDITIONAL INFORMATION. -- / �\ 1 w / -LEVEL SPREADER (LS-11) ORIGINALLY APPROVED UNDER Pre -Development Post -Development Area, ac. Area, ac. DA A 16.25 17.04 DAB 1 7.20 1 6.41 WATERSHED SUMMARY FOR SUBAREA B Area, 1-year Flow, CN ac. cfs DA B (Pre-Dev.) 60 7.20 1.52 DA B (Post-Dev.) 1 90 6.41 0.20 VRRM Post -Development Impervious Area Summary (Boundary defined by this Project's Limits of Disturbance) 2-year Flow, cfs 10-year Flow, cfs Roads & Parking Lots 421,925 sf Buildings & Pool Area 239,350 sf Sidewalks 58,725 sf 3.32 1.04 11.31 11.18 720,000 sf I SCALE 1 =120I SHEET NO. 15 WET POND CONSTRUCTION NOTES: FACILITY PLANTING SPECIFICATIONS: 1. THE CONTRACTOR SHALL ESTABLISH AND MAINTAIN A VEGETATIVE COVERAGE IN THE POND AND ITS BUFFER. 2. THE CONTRACTOR SHALL ALSO INSTALL THE WETLAND SHELF AND AQUATIC BENCH PLANTINGS, AS REQUIRED, AND USE NUTRIENT RICH SOIL IN THESE AREAS TO PROMOTE HEALTHY GROWTH AND ROOT DEVELOPMENT. 3. PLANT SELECTION SHALL PROMOTE DIVERSE WILDLIFE AND WATERFOWL USE WITHIN THE STORMWATER WETLAND, AQUATIC BENCH AND BUFFERS. 4. WOODY VEGETATION MAY NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THE TOE OF THE EMBANKMENT NOR WITHIN 25 FEET FROM THE PRINCIPAL SPILLWAY STRUCTURE. 5. A VEGETATED BUFFER SHALL BE PROVIDED THAT EXTENDS AT LEAST 25 FEET OUTWARD FROM THE MAXIMUM WATER SURFACE ELEVATION OF THE WET POND. PERMANENT STRUCTURES (E.G., BUILDINGS) SHALL NOT BE CONSTRUCTED WITHIN THE BUFFER AREA. EXISTING TREES SHALL BE PRESERVED IN THE BUFFER AREA DURING CONSTRUCTION IF POSSIBLE. 6. THE SOILS IN THE STORMWATER BUFFER AREA ARE OFTEN SEVERELY COMPACTED DURING THE CONSTRUCTION PROCESS, TO ENSURE STABILITY. THE DENSITY OF THESE COMPACTED SOILS CAN BE SO GREAT THAT IT EFFECTIVELY PREVENTS ROOT PENETRATION AND THEREFORE MAY LEAD TO PREMATURE MORTALITY OR LOSS OF VIGOR. AS A RULE OF THUMB PLANTING HOLES SHALL BE THREE TIMES DEEPER AND WIDER THAN THE DIAMETER OF THE ROOT BALL FOR BALL -AND -BURLAP STOCK, AND FIVE TIMES DEEPER AND WIDER FOR CONTAINER -GROWN STOCK. 7. AVOID SPECIES THAT REQUIRE FULL SHADE, OR ARE PRONE TO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OF TREES AND SHRUBS IS STRONGLY RECOMMENDED AS A MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS. CONTRACTOR REQUIREMENTS: 1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS. 2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION. THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE SPECIFICATIONS MANUAL (COPIES ARE AVAILABLE FOR A FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS). 3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERY STOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005. 4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN. 5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY 1-800-552-7001 BEFORE ANY EXCAVATION). 6. REFER TO THE APPROVED CONSTRUCTION PLANS FOR ANY DETAILED SITE INFORMATION. 7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES. 8. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE BARK, BUDS, BRANCHES, STEMS, OR OVERALL SHAPE OF THE STOCK. CONTAINER GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE BEEN GROWN. 9. ALL PLANT MATERIAL UNLESS OTHERWISE SPECIFIED SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL BE HEALTHY, VIGOROUS, AND FREE FROM DEFECTS, DECAY, DISEASES, INSECT PEST EGGS, AND ALL FORMS OF INFESTATION. ALL PLANT MATERIAL SHALL BE FRESH, FREE FROM TRANSPLANT SHOCK OR VISIBLE WILT. PLANTS DEEMED UNHEALTHY WILL BE REJECTED. 10.ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL. CONTAINER STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED. 11.PLANTS NOT INSTALLED ON THE DAY OF ARRIVAL ON SITE SHALL BE STORED AND PROTECTED BY THE CONTAINER. OUTSIDE STORAGE AREAS WILL BE SHADED AND PROTECTED FROM THE WIND AND SUN. PLANTS STORED ON SITE SHALL BE PROTECTED FROM ANY DRYING AT ALL TIMES BY COVERING THE BALLS OR ROOTS WITH MOIST SAWDUST, WET BURLAP, WOOD CHIPS, SHREDDED BARK, PEAT MOSS, OR OTHER SIMILAR MULCHING MATERIAL. 12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS MUST BE APPROVED BY THE DESIGNER. 13.MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBALL AND UTILITY CONFLICT). MAJOR ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER. 14.NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN. 15.PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOTSTOCK. 16.THE CONTRACTOR SHALL MAINTAIN A ONE (1) CALENDAR YEAR 90% CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE FOR ONE CALENDAR YEAR. 17.THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING ON A DAILY BASIS. 18.THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE CONTRACTOR'S CONTROL. FACILITY CONSTRUCTION: 1. THE CONTRACTOR SHALL USE THE WET POND AS AN E&S CONTROL STRUCTURE, IF SHOWN IN THIS MANNER ON THE APPROVED ESC PLANS. IF APPLICABLE, THE WET POND SHALL SERVE AS A SEDIMENT BASIN DURING PROJECT CONSTRUCTION. IF THIS IS DONE, THE VOLUME SHALL BE BASED ON THE MORE STRINGENT SIZING RULE (EROSION AND SEDIMENT CONTROL REQUIREMENT VS. WATER QUALITY TREATMENT REQUIREMENT). INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED DURING THE CONSTRUCTION PHASE, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION WET POND IN MIND. THE BOTTOM ELEVATION OF THE WET POND SHALL BE LOWER THAN THE BOTTOM ELEVATION OF THE TEMPORARY SEDIMENT BASIN. APPROPRIATE PROCEDURES SHALL BE IMPLEMENTED TO PREVENT DISCHARGE OF TURBID WATERS WHEN THE BASIN IS BEING CONVERTED INTO A WET POND. 2. WET PONDS SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE POND IS COMPLETELY STABILIZED. IF THE PROPOSED POND SITE WILL BE USED AS A SEDIMENT TRAP OR BASIN DURING THE CONSTRUCTION PHASE, THE CONTRACTOR SHALL DE -WATER, DREDGE AND RE -GRADE THE SEDIMENT CONTROL FACILITY TO DESIGN DIMENSIONS AFTER THE ORIGINAL SITE CONSTRUCTION IS COMPLETE. 3. THE CONTRACTOR SHALL ASSEMBLE CONSTRUCTION MATERIALS ON -SITE, MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT STAGING AREAS WHEN POSSIBLE. 4. THE CONTRACTOR SHALL CLEAR AND STRIP THE PROJECT AREA IF REQUIRED TO THE DESIRED SUB -GRADE. 5. THE CONTRACTOR SHALL INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION PRACTICES. ALL AREAS SURROUNDING THE POND THAT ARE GRADED OR DENUDED DURING CONSTRUCTION MUST BE PLANTED WITH TURF GRASS, NATIVE PLANTINGS, OR OTHER APPROVED METHODS OF SOIL STABILIZATION. 6. THE CONTRACTOR SHALL ALSO EXCAVATE THE CORE TRENCH AND INSTALL THE SPILLWAY PIPE. 7. THE RISER AND APPLICABLE OUTFLOW STRUCTURES SHALL BE INSTALLED, AND THE CONTRACTOR SHALL ENSURE THE TOP INVERT OF THE OVERFLOW WEIR IS CONSTRUCTED LEVEL AT THE DESIGN ELEVATION. 8. THE CONTRACTOR SHALL CONSTRUCT THE EMBANKMENT AND ANY INTERNAL BERMS IN 8- TO 12-INCH LIFTS, COMPACTION SHALL BE COMPLETED IN LIFTS WITH APPROPRIATE EQUIPMENT. THE CONTRACTOR SHALL ALSO ADHERE TO THE CLAY LINER SPECIFICATIONS OUTLINED IN TABLE 14.4 BELOW: rage 14.4. Clay r joeF Specrl+carions Property TestMethud Unit S cifcation Permeability ASTM D-2434 CmJsec 1 x 1p Plasticity Index of Clay ASTM D-423M24 % Not less than 15 Liquid Limit of Clay ASTM D-2216 % Not less than 30 Clay Particles Passing ASTM D-422 % Not less than 30 Clay Gom action ASTM D-2216 0/u 95% of standard proctor dens it source: Vlr{Jmla S10rmwater Management Handl)ooK (19I:9) 9. EXCAVATION AND GRADING TO THE APPROPRIATE ELEVATIONS AND DESIRED CONTOURS SHALL BE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE POND. 10.THE EMERGENCY SPILLWAY SHALL BE CONSTRUCTED IN CUT WHERE POSSIBLE, OR IN STRUCTURALLY STABILIZED SOILS. 11.THE OUTLET PIPES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION, SHALL BE INSTALLED. 12.EXPOSED SOILS SHALL BE STABILIZED WITH TEMPORARY SEED MIXTURES APPROPRIATE FOR THE POND BUFFER. ALL AREAS ABOVE THE NORMAL POOL ELEVATION SHALL BE PERMANENTLY STABILIZED BY HYDROSEEDING OR SEEDING OVER STRAW. 13.THE POND BUFFER AREA SHALL BE PLANTED WITH A VEGETATIVE GROUND COVER AND THE CONTRACTOR SHALL THEN INSTALL THE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS. 14.ALL CONSTRUCTION SHALL ADHERE TO THE VIRGINIA DEQ POST CONSTRUCTION BMP CLEARINGHOUSE REQUIREMENTS SET FORTH IN DESIGN SPECIFICATION NUMBER 14. FACILITY MAINTENANCE: MAINTENANCE OF THE WET POND(S) IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE POND. DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER: 1. MEASURE SEDIMENT ACCUMULATION LEVELS IN THE FOREBAY. 1. MONITOR THE GROWTH OF WETLANDS, TREES AND SHRUBS PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE. 2. INSPECT THE CONDITION OF STORMWATER INLETS TO THE POND FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING. 3. INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY. 4. INSPECT POND OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, ETC. 5. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES. 6. INSPECT CONDITION OF ALL TRASH RACKS OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION OR OTHER FAILURES. 7. INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. 8. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE POND FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING, AND MAKE NEEDED REPAIRS IMMEDIATELY. 9. REPAIR AND REPLACE AS NECESSARY. 10.PLEASE SEE THE TABLE BELOW FOR ADDITIONAL MAINTENANCE MEASURES: TablI 14.6. Typicar We Pond Womi-enarlce Tasks and Frequency Maintenance Items Frequency + Mowing - twice a year Quarterly or aft er major stone s + Rernave debris and blockages (}1 inch of rainfall) * Repair undercut, eroded. and bare sail areas + Mowing Twice a year + Shoreline cieanupto remove trash. debris and foatahles + Afull maintenance inspection Annually + Open up the riserto access and test the valves • Repair broken mechanical components; I needed One time --during the + Pond buffer and aquatic ben-ch reiInto ri,_ement plantings second yearfoilowin construdw + Forebay Sediment Removal Every 5 to 7 years + Repa it pi s. the riser ands it Iwo , ns needed From 5 to 25 years FACILITY INSPECTION: MULTIPLE INSPECTIONS ARE CRITICAL TO ENSURE THE BASIN(S) ARE PROPERLY CONSTRUCTED. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO INSTALLATION. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR, WITH THE ENGINEER AND INSPECTOR, DURING THE FOLLOWING STAGES OF THE WET POND'S CONSTRUCTION PROCESS: 1. PRE -CONSTRUCTION MEETING 2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) 3. EXCAVATION/GRADING (E.G., INTERIM/FINAL ELEVATIONS) 4. WET POND INSTALLATION (E.G., INTERIM AND FINAL ELEVATIONS) 5. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPILLWAY, AND THE OUTLET STRUCTURE(S). 6. PLANTING AND VEGETATIVE STABILIZATION PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT) 7. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) STORMWATER MANAGEMENT FACILITY GRADING Elevation (ft) Area of Forebay Cell Contours (sf) Volume (cf) 386 428 0 388 864 1,267 390 1,442 3,548 391 1,785 5,159 392 2,164 7,130 394 - - 396 - - 398 - - Elevation (ft) Area of Main Cell Contours (sf) Volume (cf) 386 5 0 388 523 386 390 1,908 2,673 391 3,013 5,112 392 5,559 9,334 394 - - 396 - - 398 - - VA DEQ STORMWATER DESIGN SPECIFICATION NO. 14 Elevation Area of Wetland Volume (ft) Cell Contours (sf) (cf) 386 - - 388 - - 390 218 0 391 512 355 392 882 1,043 394 - - 396 - - 398 - - Elevation (ft) Total Facility Area Contours (sf) Volume (cf) 386 433 0 388 1,387 1,730 390 3,568 6,516 391 5,310 10,927 392 8,605 17,818 394 13,155 39,418 396 18,066 70,509 398 23,607 112,059 .SECTION -1: TYPICAL DETAIL +,115aEFI SHE] F WIET-A&D I')_ VM 25 EILANDGElL INPLOW FROM FOREBAY k+a+ QV DGDLILFIFIL-I lAAY TVOEFTH - 12' FARE BIN r tF1E FER TO TABLE 14.2 FOR VOLUME (REFEFTOTABLE FIEgU1RIEMENITSI fi�T� 9B►#GFi 14.2 FOR)AXIUME PEO.L_AFIE h,1EM'9} r] HFnH FLOW LA NDSCAPING (FEE FEFi TO TA ItF 19.2 FOR Li AhPI P1011 IEM61.IT&) POND AERATIflM 111C 9Emii TY EENCH E MP PL AWMEW SER VVET POND FL0W PATH AND FK)O L 4EOMETFIY OqEF6R TO TABLE -14.2 FOR L-i AND L2 R6LIUIREMENTS� FI RII TO TABLE 14.2 AND 002174aPEC NIB. 13 bON9T'RJr_TL WRTLAN6 E6aT1ON 6 FOR Li AND L2 VCL_L"E .AND ETORA6E 13EPTH CRITEFLb. 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Net Yong' Nsfgn 50onarics 0 1 wino plated :gook 1 aktached wLLh 3r &• raekener e -1;'t1' dip. holes I.S'iomctric t IPe 1/4' HDPE pAl,a (opl.icnai) culvelt tikssr"�' -ro `I HnPF si.r43Ci.li rl=l PIUSkiC i i w.h 2-1/a" I'SGIC9 and 1/£" Ohio nzanu=eo-Lurod by PLax-ia 3oludona rnc. or equal l 00 00 .t3s " r ✓a�s,r '= ¢"' ehoxn -With aptiQnal plat% Hr]PF tL-urI,,,rW r,lr YlAn ,r11k.1-1 2-1,f9" holes and 1/4- plati vCC L1011 manufactured by Plastic !3DI. 4ions Lno. or equal 3IB" dia hold D O 41) f 0 a I 0 t ,I r single B]dP PLASTIC P.q. Bns ta�q� DFB'RIS C A L F SOLUTIONS iYinci es�IL1 r va 22MI INC. 877-877-5727 rrw.ple�ic-eol�.:��eom 100-yr PE, 10-yr PE, 2-yr PE, 1-yr PE, 415 PROPOSED LEVEL II 'WET POND B' DETAIL WET POND'S' DESIGN & REQUIREMENTS: SCALE 1"=30' \ Treatment Volume, Tv (VRRM) 18,130 cf \ Minimum Treatment Volume Required for Level II Basin 27,195 cf Treatment Volume Provided at MWSE 17,818 cf ' Minimum Percentage of Tv Provided at MWSE 50 % ' Percentage of Tv Provided at MWSE 66 % \ / Ponding Depth Corresponding to Minimum Tv Required 0.9 ft PROPOSED FLAT VDOT CLASS Al COARSE AGGREGAT I ( / / \ \ / Maximum Ponding Depth allowed for Minimum Tv 4 ft OUTLET PROTECTION w/ GEOTEXTILE FILTER FABRIC UNDERLAYMENT. FABRIC TO BE KEYED INTO EX. GROUND 9" ; ' \ / Maximum Percentage of Tv Provided above MWSE 50 MIN. AT ENDS & ALONG PERIMETER. FABRIC TO OVERLAP A -LIMI����� F \ / Percentage of Tv Provided above MWSE 34 % MIN. OF 9" (L=33', W1=4', W2=15', D=18" MIN.) STREAM, T1xP. _ Minimum Forebay Volume Required (15% of Tv) 4,079 cf \ \ / Forebay Volume Provided 7,130 cf \\ �� \r / / Minimum Upper Wetland Shelf Area (10% of Pond Area) 861 sf GREENWAY, -4+00 / �\ TYP. / Upper Wetland Shelf Provided 882 sf tEE THIS SHEET FOR SCALED \ I� 1 PROF S OF THE ALIGNM \ �\ 1 OCATION 'bI FUTURE PIP OUTFALL. � I 1 STORM SEWER ESIGN TO BE PART OF \ I � �THE't\N CENTER's FINAL SITE PLAN. ' O ioWIDE T P OF _ PRESERVED STEEP DAM ELEV.=3' 8' SLOPES, TYP. FLOW PATH > 3:1 V�(FLOW LENGTH=i95'/WIDTH=65') _A '�� � PROPOSED 175.66' OF V / 015" CL. III RCP Qe 1.14% o w/ VDOT STD. EW-i 00 \ \ 12' WIDE ACCESS ROAD TO RISER FOR \ POTENTIAL MAINTENANCE PROPOSED ioo' WIDE VDOT CL. Al RIPRAP LINED EMERGENCY SPILLWAY CREST ELEV.-396.75'. SPILLWAY TO SHORTEST FLOW PATH (175') / / \ \<AVE 4:1 SIDE SLOPES FOR VEHICULAR TRANSITIONS. OVERALL LENGTH (137') > ).8/ INTERNAL BERM LOCATED BETWEEN THE WETLAND CELL & MAIN CELL TO HAVE A TOP OR BA �� \ i �A PROPOSED VARIABLE WIDTH SWM ELEVATION OF 392.0' WITH A 15' WIDE WEIR / CE / �) \ o E « \ \ �& ACCESS EASEMENT, TYP. (CREST ELEV.=391.0'). WEIR TO CONVEY FLOWS FROM WETLANDS CELL TO MAIN CELL. +�� , j ���\P 12' WIDE ACCESS ROAD O. TO RISER FOR POTENTIAL 300s o � ,' � � MAINTENANCE INTERNAL BERM LOCATED BETWEEN THE �� F V FOREBAY AND WETLAND CELL TO HAVE A TOP ELEVATION OF 392.0' WITH A 15' WIDE WEIR (CREST ELEV.=391.0 ). �\ F VA WEIR TO CONVEY FLOWS FROM hhAIN V �� FOREBAY CELL TO WETS S L. �CELL OFSP 1o' WIDE, 12" DEEP AQUATIC BENCH \ A ANA�GED STEE LO S, TYP. \\ 2+ 0 - -_- -_--- CONTRACTOR SHALL USE \ �/ NUTRIENT RICH TOPSOIL FOR THE AQUATIC BENCH & SHALL ENSURE - - - HEALTHY GROWTH OF PLANTINGS 325s PROPOSED VDOT STD. B-i (048" REINFORCED CONCRETE MH BASE) " DURING THE FIRST YEAR (TYP.) �� F PC PROPOSED \ � TO SERVE AS THE ESC RISER. CONTRACTOR SHALL CONVERT THE ESC = MWSE2' 39 � RISER TO A PERMANENT SWM RISER. PERMANENT SWM RISER TO BE A \ \� 57�f �� VDOT STD. MH 1 WITHOUT THE FRAME &COVER INSTALLATION. WITH \ \L \T OF EC \ / THE FRAME & COVER, THE MH-i's RISER OPENING IS 24" IN DIAMETER. \ \ RISER TOP TO INCLUDE A TRASHRACK, SEE DETAIL ON THE NEXT SHEET. RISER RIM ELEV.=395.75'• RISER TO INCLUDE (i) ONE 02.33" LOW -FLOW ORIFICE (INV.=392.00) AND (4) FOUR 06" MID -FLOW ------ - - - - - - - - - - ORIFICES (INV. 395.00). AQUA TIC BENCH (ZONE 1) PLANTING SCHEDULE FORSWM FACILITY -- ------- PROPOSED 2' WIDE PROTECTIVE BARRIER AROUND THE RISER TO BE SYM BOTAN ICAL COMMON NAME SZE SWM FACILITY _ - CONSTRUCTED OF GABION BASKETS FILLED WITH STONE. QUANTITY COVEPAGE (Sf) --__ DIVERSION TOP TO EXTEND i' ABOVE THE MWSE. STONE FILLED GABION BASKETS TO EXTEND BELOW GRADE, TO THE RISER BASE OR ZONE 1 PLANTINGS TO A POINT OF ADEQUATE ANCHORING. SEE GENERAL SWM NOTE #5 ON THIS SHEET. PC PONTEDERIA PECTINATUS POND WEED - - 650 \ - - - - --------------------- VALISNERIAAMERICANA WILD CELERY - - 650-----____----- --------------------------------- EC ELODEA CANADENSIS WATERWEED - - 575 _- 415 PROPOSED VDOT STD. B-1 04 8" REINFORCED CONCRETE MH BASE TO EXISTING SERVE AS THE ESC RISER. CONTRACTOR SHALL CONVERT THE ESC RISER GRADE TO A PERMANENT SWM RISER. PERMANENT SWM RISER TO BE A VDOT STD. MH-1 WITHOUT THE FRAME & COVER INSTALLATION. WITH THE FRAME & COVER, THE MH-1's RISER OPENING IS 24" IN DIAMETER. RISER 41 0 TOP TO INCLUDE A TRASHRACK SEE DETAIL ON THE NEXT SHEET. RISER RIM ELEV.=395-75'. RISER TO INCLUDE (i) ONE 02.33" LOW -FLOW ORIFICE (INV.=392.00) AND (4) FOUR 06" MID -FLOW ORIFICES (INV. 395.00). PROPOSED 2' WIDE PROTECTIVE BARRIER AROUND INTERNAL BERM LOCATED BETWEEN THE THE RISER TO BE CONSTRUCTED OF GABION BASKETS WETLAND CELL &MAIN CELL TO HAVE A TOP FILLED WITH STONE. DIVERSION TOP TO EXTEND i' ELEVATION OF 392.0' WITH A 15' WIDE WEIR ABOVE THE MWSE. STONE FILLED GABION BASKETS (CREST ELEV.=391.0'). WEIR TO CONVEY FLOWS TO EXTEND BELOW GRADE, TO THE RISER BASE OR TO FROM WETLANDS CELL TO MAIN CELL. A POINT OF ADEQUATE ANCHORING. SEE GENERf'tO5 / 3WIV-1 III INTERNAL BERM LOCATED BETWEEN THE CONTR CTOR HALL I STALL FOREBAY AND WETLAND CELL TO HAVE A TOP EMBANKMENT IN A 0 DANCE wl TH DESIGN SHOW ELEVATION OF 392.0' WITH A 15' WIDE WEIR ON (CREST ELEV.=391.0'). WEIR TO CONVEY FLOWS THESE PLANS. FROM FOREBAY CELL TO WETLANDS CELL. 400 io' WIDE TOP OF DAM ELEV.=398.0' -PROPOSED 395 �� o, GRADE395 �C) h' P� C� R-0PO� A, A M SE= 392 0' -io' WIDE, 12" DEEP 390 AQUATI BENCH 390 \K WSE 397.00 \K WSE 396.27 -51 INV= PROPOSED 175.66' OF 015" \K WSE 395.27 0 y \K WSE 394.93 �� 38000 CL. III RCP Qa 1.14% INV- PROPOSED & DEEP FOREBAY 384.00 (FLOOR ELEV.=386') TO PROVIDE 385 PRETREATMENT UPLAND OF MAIN - CELL & WETLAND CELL. FOREBAY PERMANENT POOL HELPS FURTHER REDUCE THE RISK DEPTH=6' (FLOOR TO PREVENT FLOATATION THE RISER BASE OF CLOGGING IN THE LOW -FLOW ELEV.=386.o') AND BARREL CONNECTION SHALL BE ORIFICE. SEE GENERAL SWM NOTE FIRMLY EMBEDDED 6" INTO AN PROPOSED RIPRAP TO EXTEND TOE #5 ON THIS SHEET. 8'Lx8'Wx18"D REINFORCED CONCRETE STREAM BANKS, AS SHOWN. 0 FOUNDATION. THE CONC. FOUNDATION CONTRACTOR SHALL NOT DISTURB 380 SHALL BE BURIED BELOW GROUND. THE STREAM AND WETLANDS >> J J N� 00 O O O� � O _LC) 00 0-)O O W W Ln Cp O O O O N 0C 0 0' r7 00 :4 r 7 0) :400 M r7 0') r7 0') 17 � 00 r7 W 0+50 1 +00 1 +50 2+00 2+50 3+00 3+50 4+00 WET POND B SECTION GENERAL SWM NOTES: 1. STATE APPROVED TRASH RACKS AND ORIFICES SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE DETAILS ON THIS SHEET & NEXT SHEET, OR EQUIVALENT, FOR INSTALLATION. 2. CONCRETE FOUNDATIONS SHALL BE INSTALLED ON ALL RISER STRUCTURES MEETING MINIMUM VESCH 3.14 SPECIFICATIONS. 3 CONTRACTOR SHALL HIRE A THIRD PARTY GEOTECHNICAL ENGINEER TO ENSURE THE EMBANKMENTS ARE STRUCTURALLY SOUND. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON THE NEXT SHEET. ALL EXISTING AND PROPOSED FILL MATERIAL AND PROPOSED CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS, AND PRESENT DURING THE CORE SAMPLING. 4 THE DOWNSTREAM EMBANKMENT SLOPES OF ALL PERMANENT FACILITIES SHALL HAVE A MAXIMUM 3:1 SLOPE. 5. STONE DIVERSION TO SLOW THE INFLOW OF WATER TO THE RISER, AND TO PROVIDE FURTHER SEDIMENT FILTRATION. IN ADDITION TO THE LOW -FLOW ORIFICE's TRASHRACK, THE STONE DIVERSION RING SURROUNDING THE RISER PROVIDES A 2ND LAYER OF PROTECTION TO REDUCE THE RISK OF CLOGGING IN THE LOW -FLOW ORIFICE. 6. THE PROPOSED LEVEL II WET POND SHALL INCLUDE AN AERATOR. SEE DETAIL ON THE NEXT SHEET. PROPOSED too' RIPRAP L SPILLWAY CR SPILLWAY TO HAV FOR VEHICUL 10' C ELI PROPOSED VDOT STD. EW-1 - PROPOSED FLAT VDOT CLASS COARSE AGGREGATE OUTLET PROTECTION w/ GEOTEXTILE FI FABRIC UNDERLAYMENT. FABR KEYED INTO EX. GROUND 9" MI ENDS & ALONG PERIMETER. FA OVERLAP A MIN. OF 9" (L=33',1 W2=15', D=18" MIN.) PROFILE SCALES 1"=50' (H) 41 0 41 0 WIDE VDOT CL. Al NED EMERGENCY XISTIN EST ELEV.=396.75. E 4:1 SIDE SLOPES GRADE AR TRANSITIONS. 405 V /IDE TOP FDAM -398 400 400 100' 395 395 \I _TER FROPOSED CTO BE GRADE \L AT 3RIC TO _390 390 J J N O N r r- W W co 06 UJ W CD M O M 17 Lei 0+50 1 +00 1 +25 WET POND B SPILLWAY ' ° 7\1 �� O � SCOTT R. COLLINS'Z Lic. No. 035791 1�, 1�01�.�SIONAL �G4�ZEAn�r) z O J a Z U w U) 0z< O Q wz W W 0 w \ Q t0 N N L9 9r_ (y) Z�z N CY) C) C:) (ne W CII CY) (D W / V) L U) Ln _j zJ l \J / Q U) LU LLI Lu0 ~ 0 z w Q O 2 LLJ U I --I Q W Z LU LU U Q w Ul V) v) LU Q LU z O Jw L.f_ O J O f� V O 0 O N LU J � w O w a � JOB NO. 182150 SCALE AS SHOWN SHEET NO. 16 0 AIR FLO 3 DIFFUSED AERATION SYSTEM SPECIFICATIONS PURPOSE: The diffused alr, aeranon manufacturershall provide an underwater aerati.an system desigaed toaerax4e de -strati Fy. and dr€ula-re wak-er without dlstu rb+ng the rUtunal Fsu rMurttiirl gs of the jakR @ nvirb rlmigrlt_ SCOPE: The diffused al r, aeration pack age shall be capable DF beintj insLa lied in lakes deeper [hart 3Ft (I on). PACKAGE_ This aeratEDn package shall ilxlude the fallowing equipment: g, Air cDm Pre ssar Eabi net enrkasura. 70 Ind udt coal pressor(&). cir cu It disconnect, and air flaw balance ng 'calve raalnifold 5- To b•e d esig nod to operate o n eiahe r: i. 6OHit power, 1 15/2081230 volt. single phase 11. 5OH2 pawner, 2 201240 Vo-lt, singire Phase ' h_ ALirfOxr�2t1 disc Lliffus�r marlifoGdS c_ Tu61 ng t �j O 4il 'ILL .� 1 f �ww,0tler�ine.oarldairily� �Ih�dela.ils CABINET/ENCLOSURE Tu61NG: fAwiJaiblta in TOOft ( NlcrWrlrlr&J 0 1 C m fires or Total rL u iced t o bins far 15y5ttm= mpr s nor Feet i m) Non -waighted poryvioyrl chloridt tubing SPECIFY, 11 S vor#s _ISO Hz ------ fee � rn) Weighted pelyreth VIEne € hlo-ride tubing 3WFUSER NIIIA IIFOLW; JE;ngI`e or Dual Nsrj Tubing lengrths per diffusor man Ifold: Qua ntity Type Slrlgfe Disc Mani (Dld (s) � (D feet t) meters} Na n-weighted tubi ng 4 Dual OISC! Marnlfold(-S) T_ El feet �o IM4t,trf) W0_I§httd tub -16t f JST10f1 AIR COMFIAESSOR1 (far Iake� aft (1 mj deep r latgerj The ale C t11pressar )shall #e a 1 /2UP fucking p6ton, Ju a I frequency, ptrmaml � pli IC + itw (p5Q elgi trio motor with Di Iles I uhriC&1i10n, direct drive (no b'el;T. CH-pul leyA), d@Signtd for field service capability. p0lyureihane rust protection, arwd #4 In . ti$e the fnllovAng moist protectlion- rherm all overload pme{ti n, and Intake air filter. The serviGeabile pares_ piston Cups, r4LAin-ar 5crlE ws, cylJnder o-rings, Mead D-rings, vAlve and valve retainers: iFm%ld IaSt two ytars In c*ntlnucus operation. Thom mair1le"xe parts sh-all bQ replJl.C@ ble with cDmrnon tools. Please consult ywr local distribulur if you r-mu ire~ a55i 51 a nt in chap*l ng si zt 5, Or applical ions. A] R COMPRESSOR CABINET ENCLI10SIIR& a. CaNnea body and corer construction shall bt 18-gauge (0_04-13in _t22cm) 344 stainless Smell. am include! EPDlu1 e4ge-grip Seal b. Cabinet 0001ing system to cvn5.Ist of two 1`2) axFml exhaust fans arced vented intake louvers on the boktorn -of dhe cahImet to proridt in aft excharige rate of 410-490 UM c CorMiprc;or-Intake AR to ht! quIck llangp wirldge typafilters .d. e-ab4neltemclosure se'curtd bystalrlless steel Iatchto accpmadate Ioc!Ling mechanism Air Flo 3 DiffawdAt Swsiem 5veaficamiims I Page 1 of F - 4 ? P/N 03-3242 OR APPROVFD EQUAL L� V. 41. J A - -r 1' : r _ f- r _ 33 •,�,�'AIR FL I A DIFFUSED ALR TTON M. No elwrIcal parts in water, safe FDr rccrcat I-D nal u - �' ['xtremirly energy efficienr and cast effective. 12in(35GUMi) dii(s arc COOLLW to ProVidC non -s1i(k mrfacQ and coffer higher efficle-neies thriukighout lif�e}�cle. Operating, depths up to 40Ft+ or 12.2rrl+. 2 Year illl a LrllILIsi vc. warl'iIlvy, x, Co enplete package jaclades CnbiDet %ti i th c omprec.�sor{s), filter Doll ' 1 v maniralds; and dJIFUSer inanirold(s). �► Sal+cty tested and ristted ti-.zth r.rL. & CM-C. cor&uirn Lag Lo UL standards; and carries a 3rd p�91 V b-S t in ° with CF_ S"TEkI Cu.pwn�IL] o`4ac RsI Ls1 p0f�d eel h in VnklA+npntL h�3-lie 1 # 1 Z i 1 h' I.T*D naa.r�a ii9lr2•rr1sP A • rJ11 1 'M1 a �f3 d2 AE3 L22 1 2• # r rrP3 '311 j �4F3-761 An •2e1 rYf3.32# af3 aES•2a2 AFI.162 t i 1 F .� * 71 +a lt+6o .1 >]4l+.rX44 6 -4+}A AO i J 1� � e t 31 5 A F- 4 2, PIN 03-3242 Ln 9 - - "- - _, y LYr.l otx Nrr YWp a •-r C�aR}74rCEbrt[I Argk4r1CMulNld Z� PRi3 DtJCT ILLZlSTRATIONS .4r Flo 3 1r1d4,Wd J.r Sk-m- s-N-Ponln 113mr ;L t o r« dn4 anion cnmrfiiora iiiiMo g ru, cip+Irw drl7M us to wan IN 12R L All W,ra.nimrIiiiiiimth "rdEmma I hn{3° oeldr`c 4 dHlsdeemir.falil ¢Nm3lrw dump w OWus.rr mrdldhao.lirurmememddhigh drnwW pdrednk-tPW*K erW i-iw rmlalla.mdwirrtls For 1l.R1 pnl log or part u•n,rr lnadwhm Enr"Ja Lagrl_M LHL'Hls5MIa NV-Z a sa-sirwi lw 4w mtftbn. ww*m w1R1lr t ap-li-Ii aid rrrglA.d yrwk*ip M Ihmmud 4nf Lew pea Jt aallrW k kprm f rm AN w F4err6 is u Ifina ldirz2�51i 141r 41.f .Ud h¢ -! L.W.-t-Lip%%a nrkr r}a0r a.W tie lhmd clear• i1r pp O F"h'iWLiW iawtr k Nr mopIL a fikilt el ter Q[hmW ad V :tram it22514imspoi'mbgm. YlI rt r1hift1d1 kiaUN:AW CANIK Jbw ror km e.,pa,,km or rmmAw %3 stun--% T' CAdatal6-i__J6*rl6urinmWMhtha O I:m npat. F�f+P I. �rrfrirrlyd, apprar-W al d Ihmd r"Ih nL and EnC.NrdL-mmra.Er ".Aw6pnrr UsasarmyL*su& a,ap'YM.4ri Larry Qi imw [adw Wrywmm npnal" dwh v w ws. War rwoiiiii anrrb" 4.am h limp for prod.rrf.ii ling jr�d 5 prr4prd.�.irL C Fmxwc r spji;u%i :r6m5 amd C-4DT wm be Aumd pmbx 5 OvraNq.6 rmw arherbimaxotm ZF IFwwx a werAlfr.rofm PFROVED EQUAL AIRIOXY-GEN DIFFUSER M.%NIFC}LDS: The air}axygerk disr diffusers shall in€ludo, but not be IImited to. the fallowing materials of CArlsLtdCCA0rr:. d. IN sr type 12 in (# �bnnrn� rrl�rrlbrani* dlffL.Ser5 allow For maximum 1 �CFM and are reslstalix to Ozone and � b, Membrane malrer ial so b t p rtmiurn q L1a11 Ly corroprkL5siort molded EPZhM with a n 0la canteen of less than t 2% i m m raves should have a wbI nirn a rn o if 1 15 5 s.11t er fora<tlons and be at least 70% h dry itic r. Diffuse r o b � p w REI with tenslte strength at 2000 psi d . Dlffuse-t w consist of membrane with Integral gasket, I:ha 5e, retaining rings, Anil air flaw cautr>al orifi[e e± Membrane shall r-vl IapsQ and seal when aerAlibn : ylretm air is ttLrned oFf f. Seallng method of retaining device ShalI generate a minirnum of 50 pounds per inch/59 Kq/ern Gf bFCL1Mfere nCE of the Stall Mg gasktt 10 p rovide a long term positive Seal a nd to prevent al r escape g. alffustr base and retain ling Fing to be constructed of poly,propylerle with wg;jnic UV stabliizers and a tensile 5i#rength of 5000 psi h . Diffuser to. have cme 314i rL (2_ Fhcrm) ron n-cal on method LoM manifold i. Each diffuser!s all irLdude a manifold that w1II can rltct up to two (2) air -discs; to the al suppty tubin-g j. Marsifold ba$e Shall fit construemd of high -density polyethylerse plastic and Iwicarporate ballast charinel-s foe leve I sulking of pads -du ring in:stallati-on WEIGHTED PQLYVINTL �11L�RIDE TU�INli� TubInq �hA1I to win5tfidue� 4f My f rRUIve b4r4'i+llflLfp°IWirl'1'I chloride (PVC) materkal. The PUC tubing sFLall he 112' f 1 effFo with a rnirLirnuFn wall thickness of 1 f4" (.64 Cm), Pressuro rating shalt 1j4 225 psi as 70o F 1 D C7. C4A1 lengths shall be 100' (30 m), with a weight per 100' (30 rn) of 43lbs (2O kg). Tubing shall be Self-gillki ng, Ile ad dree, and conLai In ca rhon falack far U V p rotertinn. Flt-aSt borlsu It ytmr local distrihutor for addlzlonal Inforrrlati6ri. NON -WEIGHTED POLYETHYLENE TUBING: The po"thylene tufting shralI be rJ21n flcrn)with a rtlinfmLim wall thickness of _136in tl _:5mrn). Pressure ratl nq shall b-e 100 ask at 23 F (22 C). Coil lengths shall be 100' f30 rn), tivM a Weight per 1QQft (30M)-of 11 Ihs (5 kg)_ Tubing shall eanain 2% carbon hlmk for long mrm UV pratectlem. Please consult ylxur Iaml dis-Wbutor for add ltIcmid information, INSERT FITTimil -. Insist t SLtIngs are used to repatr, adapt, or canrlect with the p-alwethyle ne tubing, Fittings mi IaM n shall Intl ude lime size cou plings . mWe adapters, and el brows. T-ESTIHC: A. Saftty • The aerator system shall be tested and approved a5 a unit. 5.eparate cwponent testing not aLlovred. Unit rnu 5# be terIE d 6V E 11, ETL-C, CE, UL or oth er arer edlied tes ring fa6l iries. 6. Performance - Um It must Kipe I.nd�I &hd-w otgkimann t,artlmg pro ld13d byGSEL MANUFACrUMER: The dilTwsed air, aeration system shal I be Air FIo 3 Sy5tern* _-_- as rniknvFarkure4 by Otterbint Ear@ho. Inc.,3840 WMN ROAD LkST Emirnavii, PA 1 B[49. U_SA FH. (610) 965-601 E. or approved equal. F-or app•-Qved equal status, supplier sh al I provide~ the Wicalrlg informtlorl #o Cho Rrgjq-ct OtOgmr, within I D Oay5 4f the hid nptrting date, for written approval. wARRANFr.'Tht aeratlw wstcm shall include a twucyear uramantycin Lhe air cam pressor, air diffuser and f�• ' 3P orscs per Pad -N Qlsc hfa]t}AFnpJ]i2 pdr 5Yi11im • , - 9 115?4.1' 2 30?2.5,-%fs0 220rZAISO 4 SYSTEM r,f Diffd$er CerLnRr�ssor{s) Pad(s) AF3-IZ I 3 I 1 2 t AF3-131 AF3-141 AF3-112 # 11F3 122 AF3.241 1 4 I E ;1 2 2 4 _- $ I 4 1 16 I 1 1$ 1 11 sea.9j49 4 23014.7}60 E 12 CIF12E1 AF S-�$ I ,Af i ,222 AF3-242 IsF 2ti2 underwalter tubing. F - 4 ' PIN -0- 242 OR AP PROVED FIQUAL - AAr FEG 3 Iiffui ed Xr 5Vscei n Sp e•clrecarlona I rage a of 2: EMBANKMENT NOTES: AFTER AN INVESTIGATION OF THE SITE's SOILS, SITE VISITS, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY AND AN EXAMINATION OF VA DEQ APPENDIX A: EARTHEN EMBANKMENT, THE APPLICANT HAS PROVIDED A COMPREHENSIVE EMBANKMENT DESIGN THAT DOES NOT NEED A GEOTECHNICAL STUDY AT THIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY EMBANKMENT DESIGNS PROPOSED. A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED BELOW, MANDATING THE CONTRACTOR MEETTHESE REQUIREMENTS AT A MINIMUM. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING & THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM OF 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL AND CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS. SECTION A-9: IVPICALA GRAFEICAL DE I _AIL � Hbc'a'1��erreo'us fill 4 fir. t off trench-C below s4table mrn'#�rrol Soil nr rock LT------� TYPICAL HOMOGENEOUS EMBANKMENT �p 1 e Outlet Coarse fir PedgMted WIVGtar QF'otJ� 310M FoundcSw drain FOUNDATION DRA PN ddrn Sand, trod! rock _11drCin of mt kne �klransiW filter CHIMNEY DRAIN IfrJFISI:tIon fill ,Rork or gr`alrel Eki nket drain SLANXET -DRAIN Bock or gravel IFa1n Tron: ition filter TOE D-RAI N Sovr-€1e: SCS EVinee n?r ,T Stud Manual F igul-e A -la . Hom-ogeir1 ecrr s Eimb T;irkw ejas tr,r Se epa a Con trals APPROVED TOND 4' DESIGN CHECK: Treatment Volume for Block 5 & Village Center, Tv (VRRM) 43,680 cf Minimum Treatment Volume Required for Level II Basin 65,520 cf Treatment Volume Provided at MWSE 62,816 cf Minimum Percentage of Tv Provided at MWSE 50 % Percentage of Tv Provided at MWSE 96 % Ponding Depth Corresponding to Minimum Tv Required 0.1 ft Maximum Ponding Depth allowed for Minimum TV 4 ft Maximum Percentage of Tv Provided above MWSE 50 % Percentage of Tv Provided above MWSE 4 % Minimum Forebay Volume Required (15% of Tv) 9,828 cf Forebay Volume Provided 11,003 cf STORMWATER MANAGEMENT FACILITY GRADING Elevation (ft) Area of Forebay Cell Contours (sf) Volume (cf) 358 - - 360 422 0 362 1,155 1,517 364 2,193 4,810 365 3,074 7,431 366 4,095 11,003 368 - - 370 - - 372 - - Elevation (ft) Area of Main Cell Contours (sf) Volume (Cf) 358 3690 0 360 5,293 0 362 7,160 12,406 364 9,290 28,810 365 11,258 39,068 366 14,199 51,768 368 - - 370 - - 372 - - Elevation (ft) Area Contours (sf) Volume (cf) 358 3690 - 360 5,715 0 362 8,315 13,949 364 11,483 33,662 365 14,332 46,543 366 18,294 62,816 368 29,044 109,742 370 33,823 172,548 372 38,733 245,049 General Construction notes for Stormwater Manaaement Plans 1. All dams and constructed fill to be within 95% of maximum dry density and 2% of optimum moisture content. All fill material to be approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. 2. Pipe and riser joints are to be watertight within stormwater Management facilities. 3. For temporary sediment traps or basins which are to be converted to permanent stormwater management facilities; conversion is not to take place until the site is stabilized, and permission has been obtained from the erosion control inspector. Stu rm RaX Thf ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD 60 INCH RACK SHOM DIMENSIONS IN INCHES PLAN SturmilaxTM' Round Series for Concrete Manhole Part No. DTm A Dim B Dim C Min ID Min OD R,r24 17Y4 14Yi 28 - 24 30 Ar36 21 Y4 14 h 403+i 36 43 RS 4$ 27 Y, 19 54 48 57 RSS-60 27 18Y 66% 60 70 Plastic Solutions, Inc. CUSTWER PO Box 4386. 1VLndxstfs, VA 2.2b04 M McChee Rd, Wlndws&r, VA 72 3 tt37P187T-5727 phmw PROJECT- (5401 722-2219 fwx httpcffvrvr'w.plast7c-solutlan,eaam C WET POND 4 MODIFICATIONS: �\ �%� \�� APPROVED 'WET POND 4' PLAN 1. THIS PLAN ONLY PROPOSES ONE CHANGE TO THE X \ SCALE 1"=30' APPROVED 'WET POND 4'. THIS PLAN PROPOSES TO 'APPROVED RIPRAP LINED PERMANENTLY PLUG (WATERTIGHT) THE TWO APPROVED CHANNEL PROTECTION SWIMORIFICES, AND REPLACE THEM WITH TWO NEW SWIM ORIFICES (NEW 03" LOW -FLOW ORIFICE INV.=366.00 & SIX (6) NEW 08" MID -FLOW ORIFICE INV.=369.25'). gppROV/ 2. THE PROPOSED CHANGE DESCRIBED ABOVE SHALL GENERATE MINIMAL EARTH DISTURBANCES. _ \ / 3. ALL OTHER REMAINING 'WET POND 4' APPROVED DESIGNS ED FOREB'4Y \ \ SHALL REMAIN. THIS PLAN SIMPLY SHOWS THE BOTOM ELEV.=360.0' \ \ ADEQUACIES OF THE APPROVED 'WET POND 4' WITH THE i FUTURE TOWN CENTER &BLOCK 5. SEE ORIGINAL WPO APPROVED PLAN FOR DETAILS (WPO 201700037). \ 4. AN ASBUILT SURVEY OF'WET POND 4' IS REQUIRED�� I I FOREBAY \ \ \ BEFORE THE FULL RELEASE OF THE SWIM BOND. / CELL T �� �g0 APPROVED �ABIO � --� BASKET, STABILIZED / OVERFLOW SPILLWAY, CREST ELEV.=367.0' o 61 �0 YR /PEAK WSE 370.9 / 0 YR PEAK S379.46 2-Y PEAK /WS - 5 b/ 1-Y PEA W E= 6917 I I / / / I I I I III / I I I I MAIN CELL ENOM ASSINGWE POND APPROVED) PER WP 2 170 03 . j MWSE=366.00 I / a - MANAGED STEEP I � z- I\ AP ROVED POrUD / _� SLOPES, TYP. BOTTO E EV.=358.0' I % II PP I OVI D 1I TIDE �AFETY BENCH R E 0' V1f N J RANGING IN ELEVATION BETWEEN / 3 6' & 366.20'TER�WP� 20� 700037 APPROVED iz' WIDE TOP APF?ROVED 10- WIDE AQUATIC BENCH OF DAM ELEV.=37z.o' RANGING IN ELEVATION BETW EN "� 3 4.5' & 366' PER WPO 017000 7. _/ 11 IAPPiROVED 3 ' WIbE J / 35' l RIPRAP LINED EMERGENCY I SPILLWAY CR ST ELEV.=,� APPROVED iz' WIDE 370.20 (WPO 201700037). ACCESS ROAD TO POND 4/ /FOR I MAINTENANCE APPROVED'STM X-02' DRAINAGE AL / I ;_ \ STRUCTURE (RIM=372.20, INV IN=362.80, INV. OUT=362.70(LOW-FLOW), INV. / / APPROVED 'STM X-01' (POND 4 072" RISER) OUT=363.60 (PRIMARY FLOW, 60"). /,' / RIM=369.80 STRUCTURE TO SPLIT FLOW TO PROVIDE �J INV OUT=363.30 (060" RCP) ADDITIONAL DOWNSTREAM WATER / / 06" Ee ' r QUALITY TREATMENT. SEE WPO ti (TO BE REPLACED WITH NEW 03 ORIFICE, INV.=366.00) 201700037 FOR DETAILS. 09" "" FLOW ^Rr r INV. - `ems REPLACED WITH (6) SIX NEW 08" MID -FLOW LLORIFICES, INV.=369.25) T w (TO BE / I 7� 0 I A PROVED LOW -FLOW PIPE %% 0 1 (8 56' a01 5%) DIRECTING A GREENWAY -- �STREA , TYP. APPROVED 69.11' OF 060" RCP A AT 1.59% WITH CONCRETE 4 CRADLE TO SERVE AS WET POND 4's BARREL (WPO 201700037). � APPROVED VDOT STD. ES-1 - UNDER WPO 201700037. 8� H1DRE9TRLICTuwu PVSnC13Y PLASTIC IHC_ 4UMTER SECnOH REMOVABLE FORAOCESS SOMETRl CONCRETE STRUCTURE DIMENSION INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILABLE OPTIO145 CROSS IS RACING FOR OVERHANG Ha PE ANTI -VORTEX PLATE DATA DRMN r- AMa err: DEMIL P RTION OF THE RUNOFF TO / TYP. PP ROVED LEVE LSPREADER PER WPO 201700037. / APPROVED LEVEL SPREADER, PER WPO 201700037. CONSERVATION EASEMENT PER WPO 201700037. r APPROVED 30' LONG CLASS I / RIP -RAP OUTLET PROTECTION UNDER WPO 201700037. W-OO CO UIsITF LBE �IARLE I)epartrwnt of Corninunity D-eve lopment Construction record Draw wigs As -built) for VSMP z D o The following is a list of infornnation required on construction record drawings for stormwater facilities (reference W ater Protection Ordinance 17-422). It is preferable heat the construction record dra wing be prepared by someone ogler than hike designer. Please do riot provide design drawings as construction record drawings. �LZH o��� SCOTT R. COLLINS'� U Lie. No. 035'791 � ��ssloNaL E��� z U J Q af ZU Z) U-) co o Ln Oz< o Q z w H W L Li W W A. A signed and dated professional sea] of the preparing engineer or surveyor. B. The riatue and address of the firm and individua] pre pari ng the drawings on the title sleet. Ln IC. The constructed ]ocation of all items associated with each facility, and the inspection records to verify proper dimensions, materials and installation. The items include, but are not limited to the follo ing: 1. Inspection 1 ecords and photographs for pipe trenchycs and bedding, including underdrains. 2. Video Pipe Inspection for any pipes 'Which are not aocessi ble or viewable. . Updated Location with geo-coordinates of all facilities. 4. Verified Drainage Area neaps for the drainage area treated, and for drainage to the facilities. 5. Current physical and topographic survey for all earthen structures. Ponds should include a survey ofthe pond bottom. Surveys should verify pond volumes are per design. Corrections niay be required J for alterations from the design. 6, P1;llit5, location and type. 7. Plans and 1lrofiles for all culverts, Pipes, Riser&, Weirs tend Dr. -linage S Ilruetnres - Display the installed type of drainage structures, culvert/pipe size, weirs, materials, inlets or end treat inerLt(s), inlet and outlet protection, alignment and invert elevations cornered to design. - 9. Computations; For significant deyiations from design, provide sea]ed computations verifying that the as -built condition is equivalent or better than design. 9. Ditch Lines- Display the constructed location of a]1 ditch lines and channels, including typical sections and linings. 10. EnSenlenIS - Show a]1 platted easements with dead book references labeled. Facilities and drainage must be within platted easements. Provide copies of recorded documents. 11. Ouardrail, fences or other safety provisions - Display the constructed location of all safety provisions; fences, guardrail, including the type, length and applied -end tmatmentsr compared to design. 12. Material Iayers- b iofil te r med ia, stone lagers, sand lagers, keyw ays and cores inust be verified as ttr material types and depths. Include inspection reports, boring or test pit reports and materials certifications. Biofilter media must be an approved mate mix. 13. Access road c; - &how location of access roads, surface Iraealment, drainage, etc, as appticable, 14. Compaction reports are required to verify fill compaction in darns. 15. Manufacturers certifications for proprietary BMP* s certifying proper installation and functioning. cyi N co I 0 N N \Q LLJ J_ LU I- 0 Q 2 U 1 Uj - 5 U) LU Lu U) Lij ly- !Q V 0 N z 0 Q oc QLr) J a W z z w OZ --- < w U Q w� V) w J Q J � � O F- 0 0 m W J W '-' w a � JOB NO. 182150 SCALE AS SHOWN SHEET NO. 17 PROP71\ISERVATI EASEME 10 5 2.5 0 10 LEVEL SPREADER DETAIL (LS-11) (WITH BUBBLED REVISIONS) APPROVED LEVEL SPREADER & 15" BYPASS /SPLITTER FLOW PIPE SHALL NOT BE CONSTRUCTED PER THIS PLAN. THIS ELBOW AS PLAN REMOVES THE INSTALLATION OF THESE STRUCTURES. PROP. EW.1 - - z QL" TW 351.55 r BW 351.55 o l TW 352.00 BW 350.10 G 349.98 Aso 349.68� 'yD STM O A01.1� APPROVED 'STM A01.1' ' (TO BE MODIFIED) RIM=358.00 (TO REMAIN) c 048" INV. IN=350.33 (TO REMAIN) � TW 354.00 � BW350.60 015 INV. OUT=350.23 (TO BE REMOVED — OR SEALED WATERTIGHT) sTM 048" INV. OUT=351.23(NEW INV.=350.23)� T J '`-PROP. EW-A TW 351.00 t QQ BW 351.00 1 W �� -VAATt 1� �SWIM FACILITY EASEMENT ROP. 6.5 LF G 349.89 PROP. 20 LF ASS Al RIP RAP CLASS Al RIP RAP G 350.30 G 350.26 / / P VETCH 3349.68 yj: ? PROP. LEVEL SPREADER \ ROP. 8" SPREADER LIP \ PROP. T STONE LAYER G 350.26 G 350.20 lw PROP. CONSERVATION EASEMENT 10 O;.V 14 SCOTT R. COLLINS'Z Lie. No. 035791 1�, ZONAL E z O J d Z w Z) 0 U) O z Q O -, z w W w L9A� 1 M Cz N cy) 0 cy) W 04 N (D W i V) J LLI V) Q J �+ J < Lu > 0 U F-- ® Lu z 0 Lu Lu '—' i 0z = O z U I --I Q W� lln� Lu u Lu w ul U � Q J � ZLu J 0 � Jw 0 O J O Q 0 N w J L0 Lu W a U") JOB NO. 182150 SCALE AS SHOWN SHEET NO 18 B ookhill S ormwat Quality Summary Table Section Block Common Name SWM Facility ID Type of Facility Phosphorus achieved w/pro (Ib/yr emoval osed plan Ian # Amo Credits nt of Offsite Amount of Offsite Created Credits Purchased Ib/yr) (Ib/yr) Offsite Percent of Total Development Credits (%) Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (Ib/yr) Plan # Amount of Offsite Credits Purchased (Ib/yr) Percent of Total Development Offsite Credits (%) 1 4A Apartments Pond 11 Wet Pond 4.01 WPO 01800051 0 1.27 3.7% 5 16 TBD TBD TBD TBD TBD TBD TBD 1 4A Apartments DP-4A Detention Pond w/Underground Storage - WPO 01800051 5 17 TBD TBD TBD TBD TBD TBD TBD 1 4A Apartments CDS-4A CDS nit (Manufactured Device) 1.60 WPO 01800051 5 18 TBD TBD TBD TBD TBD TBD TBD 1 4A Apartments LS-11 Sheet flow to open space REMOVED - WPO 01800051 1 4B Apartments Pond 11 Wet Pond 0.18 WPO 01800051 Section 5 Master Plan Comparison 1 4B Apartments UD-4B Isolator Row (Manufactured Device) 3.38 WPO 01800051 Section SWM Facility ID Phosphorus Removal proposed w/master plan (Ib/yr) Phosphorus achieve Removal w/proposed plan (Ib/yr) Anticipated Amount of Offsite Credits Purchased (Ib/yr) Anticipated Percent of Total Development Offsite Credits (%) Amount of Offsite Credits Purchased (Ib/yr) Percent of Total Development Offsite Credits (%) 1 4B Apartments Pond 4B Extended Detention and 0.79 WPO 01800051 1 4B Apartments LS-4B Sheet flow to opens ace 0.74 WPO 01800051 1 - ROW Pond 11 Wet Pond 0.18 WPO 01800013 0 1.09 3.2% 1 - ROW LS-11 Sheet flow to open space REMOVED - WPO 01800013 5 Pond 14A Treatm nt Total nt Total nt Total nt Total Total Total Treatment Total 5 Treatment Total 4.81 6.42 5.16 5.14 11.75 2.1 1.43 36.81 TBD TBD TBD TBD TBD TBD TBD TBD 1 - ROW LS-11 Sheet fl w to open space REMOVED - WPO 01800013 5 Pond 14B Treatm 1 8B ROW and Iock8B Pond 10 Wet Pond 5.91 WPO 01800080 0.68 1.53 2.5% 5 Pond 15ATreatm 1 - ROW LS-10 LS-10 REMOVED - WPO 01800013 5 Pond 15B Treatm 1 - ROW LS-10 LS-10 REMOVED - WPO 01800013 5 Pond 16 Treatment 1 3 Section 1 Mass Grading Pond 4 Wet Pond 20.56 WPO (Amendment 01700037 #2) 0.46 0 1.4% 5 Grass Channel Treatment 5 Sheet Flow to Open Space 1 3 Section 1 Mass Grading LS-4.1 Sheet flow to opens ace 5.14 WPO (Ame 01700037 dment #2) Section Section 5 Nutrient Credits Total 6.8 3.87% TBD TBD 1 3 Ice Rink ROW Pond 11 Wet Pond 0.38 WPO 01800050 01800050 0.08 0 0.2% 1 3 Ice Rink ROW LS-11 Sheet flow to open space EMOVED - WPO Overall Treatment Total 141.28 52.12 1 3 Ice Rink ROW Pond 4 Wet Pond 0.89 WPO 01800050 01800050 01800050 01800050 0.68 0 2.0% Overall Nutrient Credits Purchased 34 19.37% 5.99 17.62% 1 3 Ice Rink ROW LS-4.1 Sheet flow to open space 0.67 WPO SWM Master Plan 175.56 1 3 Ice ink Pond 4 Wet Pond 2.20 WPO Anticipated Treatment Total With 1 3 Ice ink LS-4.1 Sheet flow to open space 1.79 WPO Notes: 1. Even though we are currently only proposing to purchase 34 Ib/yr or 19.37%, the total offsite credits available for purchase are 25% of the total 175.56 Ib/yr required for the development, or 43.89 Ib/yr 2. Actual credits purchased to date are 2.3 lb/yr. 3. Credit amount approved to be purcased with Block 8B, but not yet purchased, is 1.53 Ibs/yr. of phosphorous (WPO 201800080). 1 8A Senior Living Facility Pond 11 Wet Pond 3.70 WPO 01900004 01900004 0.01 0 o.o°r° 1 8A Senior Living Facility LS-11 Sheet fl w to open space REMOVED - WPO Section 1 aster Plan Comparison Section SWM Facility ID Phosphorus Removal proposed w/master plan (Ib/yr) Phosphorus Removal achieved w/prop (Ib/yr) sed plan Anticipated Offsite Amount of Credits Purchased (Ib/yr) Anticipated P Total Developm Credits rcent of nt Offsite tl%,) Amount Credit (Ib/yr) of Offsite Purchased I Percent of Total Development TH 0 SCOTT R. COLLINS'� Lic. No. 035'791,� ZONAL E� z O a M m Z w o U) O z O Q wz H W 0 W N Q N N I � ti W J N m ~� M Q LJJ Q U O LL Q I W N (D J �L 0 O uj U J � � J w C) z w = O U C� ' G w U o ~ LU V) J I U I W J w 0 ~� 0 U) m Jw J 0 Q J Q 0 rn w v � � 0 0 O N w J U ~ w w O w � _ a- U) FMJOB NO. 182150 SCALE NONE SHEET NO. 19 O(D W < (n ffsite OLU ffsite One ffsite