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HomeMy WebLinkAboutFDP202000009 Plan - Approved 2020-08-19CONSTRUCTION PLANS FOR INFLATABLE CREST GATE REPLACEMENT - RFB NOm 371 SUGAR HOLLOW RESERVOIR DAM VIRGINIA ALBEMARLE COUNTY, VIRGINIA DUNE 30, 2020 THE CONTRACTOR SHALL CONDUCT WORK IN ACCORDANCE WITH THE REQUIREMENTS OF APPLICABLE REGULATIONS OF THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA) AND ALL LOCAL, STATE AND FEDERAL RULES AND REGULATIONS. PLANS PREPARED FOR (PERMITTEE): RIVANNA WATER AND SEWER AUTHORITY 695 MOORES CREEK LANE CHARLOTTESVILLE, VA 22902 PLANS PREPARED BY: SCHNABEL ENGINEERING, LLC. 6445 SHILOH ROAD, SUITE A ALPHARETTA, GEORGIA 30005 ENGINEER CONTACT: J.R. COLLINS, P.E. CELL: (678) 935-8454 EMAIL: jcollins@schnabel-eng.com Sheet List Table Sheet Number Sheet Title 01 COVER SHEET 02 SITE ACCESS PLAN 03 EXISTING CONDITIONS SITE PLAN 04 PROPOSED WORK AREA AND LAKE ACCESS 05 MISCELLANEOUS DETAILS 06 EROSION AND SEDIMENT CONTROL PLANS 07 EROSION AND SEDIMENT CONTROL NOTES &DETAILS APPROVED by the Albemarle County Community Development Department Date 08/19/2020 File FDP202000009 0 z z w 0 0 m r J J z ry 111 N CO mZ ma told cZLL VZ yLU H- Z L1J L1J Q Q () El Z (If � > Q LLJ Z o8 0 U W W (If J J U LLJ ry J W m m U Qa J Ll Z w W U) ry O U PROJECT DESCRIPTION THE PROJECT INVOLVES THE REPLACEMENT OF THE EXISTING INFLATABLE CREST GATE AT SUGAR HOLLOW RESERVOIR DAM. CONSTRUCTION EFFORTS WILL CONSIST OF GRADING TO CONSTRUCT A LAKE ACCESS POINT, REPLACEMENT OF THE EXISTING INFLATABLE CREST GATE, REPLACEMENT OF ELECTRICAL/MECHANICAL COMPONENTS, AND SITE RESTORATION. PROJECT: 19C17071.00 DATE: JUNE 30, 2020 SHEET 01 OF 07 Le © Schnabel Engineering 2020 All Rights Reserved I WORK AREA/ LAKE ACCESS (SEE SHEET 04 FOR DETAILS) INTAKE TOWER / GATE HOUSE SUGAR HOLLOW RESERVOIR STILLING BASIN EXISTING DAM w Aftf EXISTING PARKING LOT R A Ak We pin 40 4 ■ rR r n all +Ir �! -4 F/ !,kit q F�OI'V i NSTR TON ROUTE IP 1 1, roPPi VA F 'i � iv "vt ` AT NOTES: t 1. THE EXACT LOCATIONS OF SOIL/ROCK SPOIL `t AREAS WILL BE DETERMINED IN THE FIELD BY y Iti THE ENGINEER. FORMER LOCATION OF GATE KEEPER'S HOUSE *a Arw Lh STAGING, PARK, AND SPOIL AREA' i T ` I If nnn� �. A" .ni r f d mommommo � iv "vt ` AT NOTES: t 1. THE EXACT LOCATIONS OF SOIL/ROCK SPOIL `t AREAS WILL BE DETERMINED IN THE FIELD BY y Iti THE ENGINEER. FORMER LOCATION OF GATE KEEPER'S HOUSE *a Arw Lh STAGING, PARK, AND SPOIL AREA' i T ` I If nnn� �. A" .ni r f d mommommo NOTE: EXISTING TOPOGRAPHIC INFORMATION BASED ON SURVEY BY KIRK HUGHES & ASSOCIATES DATED OCTOBER 1997, AND RECORD DRAWINGS TITLED "SUGAR HOLLOW DAM UPGRADING" BY SCHNABEL ENGINEERING DATED NOVEMBER 26, 2001. rl BM: POINT ON ROCK OUTCROP 1 / ELEV.=990.99 / \ TREE LINE (TYP.) I / I APPROX. LIMITS OF FEMA IF 100-YEAR FLOODPLAIN `I II111 \ \ \\\ \\ \\\\ \ \ 11 111111 11111 1 III \\ \ \ \\\ \ \ \ \1 IIII 111I Ilj \\ \ \ \\\ \ \ \ \1 III\ IIII IIII \\ \ \\ \\\ \ \ 1 1 11 I 1 \\ IIIII IIII 111 11\\\ II I I I I II II 1 \ I I I IIII IIII III11111 I \I \1 ( III IIII IIII II IIIIIII II I� / III I II IIII II II III111 I I l/ I Illl IIII II III IIIII IIII II I ICI II II IIII III. I I l II IIII I1 II II II III I I I I I I I I11 II I I I \\\\\IIII III\ ROCK OUTCROP SUGAR HOLLOW RESERVIOR 4 FLOW EXISTING INFLATABLE CREST GATE • BE REPLACED) _ Ile e - - �III�III�I �= �III�II� ne'�III�III�I �IIIIII nl! __ IIII IVIIIL�I�III� MIL II�IIL Iu�IIL. II@IIL _., a::I1�IIL -�� iIIIY�IIL III�IIIL�� IIIZI IIIAd. IIL�III�'inIYIIIL�III�II_- .Nl�lll wII u...iIIILpI_ EXISTING DAM STILLING BASIN INTAKE DAM 1Q MIF DISCHARGE STRUCTURE RAW WATER _ SUPPLY LINE FLOOD GATE GEAR VAULTS i / / / / SCALE: 1"=30' 0 30' 60' APPROX. LIMITS OF FEMA 100-YEAR FLOODPLAIN 11 I 11 1 I I I � � j �•j I / 1 III IIII 1 /I 11 II II I I l I l/ I I NORMAL POOL ELEV = 975.0 I I I 11• I I l l I� I I I I I II 11 II I 1 1 \1 I 1 I 1\ TREE LINE (TYP.) III 1 \ •\ l \ '\ \ \ \ ///// I I APPROX. LOCATION OF FISH SLIDE (TO BE REPLACED IN -KIND) III \\ \ \\ \\\\ \\\ \\ \ \\ \\ \ \ \ \\\\ \\ \ \\ \\ I I 1 i\ GATE HOUSE 1 I / � I 0 I 1 / 1 1 I _ / I a / c / 1 I / / 1 coo 12-INCH DIA. RCP I\ I I I I I POWER \ 1 POLE I/n" 11 I 1\ I I I I\ 1 -PARKING LOT- i / I 1 1 \ \ �k,I I k 11 1 1 1 11 1 \ o �/ 1 I 1 I I j l ill l I I CONTROL ROOM I I III \\ \ e I 1 ACCESS \ \ \ / \ \ \ I I II 1 111 \ \ \ \ \ \ \ POWER GENERATOR \ \\\\ \\ \\' \\ \ ` II \\ \ \\ \ POLE \ \ \\ \ o\\ \ \ \--/// Q, \ \ \ \ moo\ \ \ \ \ \ \\ \ \ 11 GUARDRAIL ° I \\ \\ s I: O \ \ \ \\ \ I. .1.11.11 I III \ I \\ \\ \ ROCK OUTCROP I I ( / \ \ \\ 1 \\\\\ _� \ \\ \\ 1 \ \\ — \\\ \I \\ \ \ \\ \NN \ \\\ / / I 1 \ \ \ \\ \\ \� \ \\\ \ 1 \ \ \\ � - UNDERGROUND ,, I \ \ \ 1 / \ \ OVERHEAD I I I I \ ( I I I I POWER LINE \ \ \ \\ POWER LINE (TYP.) J \\ \ I I \ I 1 \ I\ I I I I �-•- I\- -1 / / I///// // I I II I 1 1 I j / I I I MARSH/ WET AREA ROCK / OUTCROP (TYP.) I I I I I I R O z z z w 0 0 a z 0 a U y W O mom O (m v Z o W a� o E /�! �Y W ^ 0 U Lu L� rn ax �z aI�N a I 0 VZ m o75 hW U)�� 73 ooL U s N o� 0 L o 0 � L �a z w Voz Cn 0- Z w>> O w w z Z) O Q wow W_jJ U w < _j W Z Q m ¢ J am W z X w PROJECT: 19C17071.00 DATE: JUNE 30, 2020 SHEET 03 OF 07 O Schnabel Engineering 2020 Al Rights Reserved NOTES: i i I i i i i1 1. CONTRACTOR SHALL RETAIN THE SERVICES OF A PROFESSIONAL REGISTERED IN THE COMMONWEALTH OF VIRGINIA TO DESIGN THE CONCRETE BLOCK RETAINING WALL. DESIGN SHALL BE SUBMITTED TO THE ENGINEER FOR REVIEW. CONTRACTOR SHALL OBTAIN ANY VIRGINIA 811 CALL BEFORE YOU DIG DIAL 811 OR CALL 1-800-552-7001 UTILITIES PROTECTION CENTER REQUIRED BUILDING PERMITS FOR THE WA ! / LLS. I I I l I l / / / Know what's below. IT'S THE LAW 2. CONCRETE WALL SHALL BE RED] -ROCK OR AN APPROVED EQUAL. I I I I / / Call before you dig. EXTERIOR FACING SHALL BE A TEXTURED SELECTED BY THE OWNER. I I i / / 3. CONTRACTOR MAY PROPOSE, AT NO ADDITIONAL COST TO THE OWNER, NOTE: CONTRACTOR MUST COORDINATE CHANGES TO THE DESIGNED ACCESS PLAN TO SUIT HIS MEANS AND I / / WORK WITH UTILITY PROVIDERS TO METHODS. IF CHANGES ARE ACCEPTED BY THE ENGINEER, I / MAINTAIN UTILITY SERVICE AND A SAFE CONTRACTOR SHALL OBTAIN A NEW EROSION AND SEDIMENT CONTROL I / WORK SITE. PERMIT FROM THE COUNTY, IF REQUIRED. 1Q 4. CONTRACTOR SHALL MAINTAIN OWNER ACCESS TO THE EXISTING PARKING LOT FOR THE DURATION OF CONSTRUCTION. I I I I PROPOSED STAGING/ TURNAROUND AREA 25 0 \ \ PROPOSED 11 \\ \ �\ / v \ V A \ \ \ CONCRETE BLOCK I �L / \ \ \ \ \ PROPOSED DRAINAGE DITCH RETAINING WALL V \ \ V (SEE TYPICAL ROADWAY \ \ 30'-0' \ \ \ \ \ J \ SECTION ON SHEET 05) 19 A \ \ v' / , v \ V - - - - END FENCING / SUGAR HOLLOW 04 \ \ ` y \\ \ \ \ \ AT TREE LINE / RESERVIOR PROPOSED LAKE ACCESS/ LAUNCH POINT (SEE NOTES) 0+00 _ L1- 0+ \ \ 1 PROPOSED FISH SLIDE 4 / _ L50 (EXACT LOCATION AND CONFIGURATION TO BE DETERMINED IN THE FIELD AND APPROVED BY DWR) 0 1/ / 1 NORMAL POOL / / / / y / / ELEV = 975.0 / / / / / / ---MIN. 3 FEET I I 1 I EXISTING APPROX. LIMITS OF FEMA DAM / 100-YEAR FLOODPLAIN990 PROPOSED GATE (SEE � I HANDRAIL (TO / / / / ! �� DETAIL SHEET 05) 1 BE REMOVED) 1 PROPOSED l I l PROPOSED CHAIN -LINK <a /i HEADWALL / I 1040 _ FENCE (SEE DETAIL SHEET 05) PROPOSED 15' 1030 _ y I WIDE GRAVEL 11 I I ACCESS ROAD l EXISTING 12-INCH MIA RCP / 1 � I 1 \ , \ 1/ / I I 1 1020 i I 1 II 11 II 11 \\ \I I —EXISTING S I G EXISTING POWER i / / II 1 I 1010 PARK POLE (TYP.) EXISTING CONTROL 1 I I / r \ / // I 11 1 11 ROOM ACCESS OIWER�INEERHEAD 1000 1 I I I I I 1 I vv HH 1 /l I I vN vv I I I1 I 990 I 11 1 1 1 I \ V A\ EXISTING I I V I 1 1 \ \ \ HANDRAIL / o I A HE 980 1 11 I 1 I it 1 v v v v v v V \ 970 I EN�� ATQR V A A\ A \ V A \ \ / PROPOSED AV A \ HEADWALL AV A A \ 1 I 0. EXISTING UNDERGROUND A\ V AV A sso 9 1 I I 1 \ \ \ \ \\ \ , I \ \ \ I \ \ \ \ / \ \ \ 950 I I POWER LINE EXISTING / \ I 1 1 \ \ \ \ GUARDRAIL \ \ \\ / / RE -GRADE DOWNSTREAM OF HEADWALL TO ACHIEVE \ \ \ \ 0+00 \ , \ POSITIVE DRAINAGE \\ \\ \\ \ PLAN VIEW SCALE: V=10' 0 10' 20' ROAD CENTERLINE LINE DATA* Line # Length Direction Start Point End Point L1 44.84 S890 08' 47.85"E (-128.71,-44.82) (-83.88,-45.48) L2 64.21 S220 06' 58.24"E (-51.97,-67.30) (-27.80,-126.79) ROAD CENTERLINE CURVE DATA* Curve # Radius Length Chord Direction Start Point End Point C1 35.00 40.95 S550 37' 53.05"E (-83.88,-45.48) (-51.97,-67.30) BASED ON LOCAL COORDINATE SYSTEM AND HORIZONTAL DATUM OF SURVEY BY KIRK HUGHES & ASSOCIATES DATED OCTOBER 1997. 0+00 1+00 1050 1050 1040 1040 NORMAL POOL EXISTING ELEV = 975.0 GROUND LINE 1030 1030 AGGREGATE 1020 BASE STONE 1020 BACKFILL 1010 9" LAYER 1010 z AGGREGATE O BASE STONE I- 1000 ROAD SURFACE 1000 ; LU 990 990 W 980 2 r 980 PROPOSED GROUND SURFACE 970 970 GRASS LINED DRAINAGE 960 DITCH 960 CONCRETE BLOCKS 950 950 0+00 1+00 STATION A CROSS SECTION SCALE: 1 "=20' 0 20' 40' 1+00 STATION ACCESS ROAD PROFILE SCALE: 1 "=20' 0 20' 40' z 0 a U In0 0 z 0 z w Q m o m w a x U N 6 m LLI C o CO � i c C ° u u Q e c m io m `u = a �m J J o Q u C z ° ° mo Q k W 3 lY ,m to (�yvhJ m a o az 1 /�,n (� Z o o W ma C a� E Cc~r W O c p U W iz a� mc_ a, 0 �o tnz W 05 C? Co C xa U = N o mL as 0 H W Q 1+50 1040 U Z w U) � Q 1030 W W w 1020 Of U o 0 CO 1010 _j W �o� 0 w Y z W Q 1000 O W=< co Q W (n J co > J to 990 LU O W z 980 970 960 950 1+50 PROJECT: 19C17071.00 DATE: JUNE 30, 2020 SHEET 04 OF 07 0 Schnabel Engineering 2020 All Rights Reserved POST SCHEDULE POST EMBEDMENT DIAMETER (INCHES) POST TYPE FENCE TYPE ANSI HEIGHT LENGTH DIAMETER SOIL ROCK SCHEDULE VEHICULAR 72" CL. 1 V-2" 4'-6" V-6" 6.0" 4.0" 40 GATE CORNER, END 72" CL. 10'-2" 3'-6" V-2" 5.0" 3.0" 40 OR PULL LINE 72" C.L. 10'-0" 3'-6" 1'-0" 4.5" 2.5" 40 (CIRCULAR) NOTE: ALL RAILS TO BE 1-5/8" 0 SCHEDULE 40 STEEL PIPE LEVEL SECTION END POST OR CORNER POST 9-GAGE 2-INCH MESH COATED IN BLACK VINYL EMBEDMENT 1-INCH TO (SEE POST 3-INCHES J SCHEDULE) d (NORMAL) STRETCH BAR 1/4-INCH x 3/4-INCH EMBEDMENT DIA. SEE POST SCHEDULE (TYP.) DIAGONAL BRACE, 3/8-INCH DIA. ROD (TYP.) 10,-0" STRETCHER BAR GATE RAILS LINE POST, 2-1/2 INCH DIA. NOMINAL PIPE BOTTOM TENSION WIRE, 6-GAGE BRACE RAIL FOR END, PULL AND CORNER POSTS CONCRETE FOOTING (TYP.) CHAIN LINK FENCE N.T.S. 1'-6%" V ° 2 BENT RODS, 3/4-INCH DIA. TIE WIRES, 9-GAGE, 18-INCH O.C. OR HOG RINGS, 18-INCH O.C. (TYP. TOP AND BOTTOM) STRIKE STRAP LATCH ASSEMBLY FOR LOCK 3-INCH MIN. TO 5-INCH MAX. 6-INCH x 4-INCH x 1/2-INCH PLATE V-0%" DIA. GATE WIDTH = 15'-0" GATE TYPE II - VEHICULAR GATE FOR CHAIN LINK FENCE N.T.S. NOTES: 1. SIGNS BY EMEDCO OR APPROVED EQUAL. 2. SIGNS SHALL BE REFLECTIVE ALUMINUM. 3. SIGNS SHALL BE ATTACHED AT 2 LOCATIONS TO FENCE/GATES WITH TOP OF SIGN 4" FROM TOP OF THE FENCE/GATE. SLOPED SECTION TOP RAIL u mom TENSION WIRE BAND CORNER POST, END POSTS OR PULL POSTS (SEE POST SCHEDULE) GATE POST (TYP.) STANDARD CI CONNECT( BRACE RAIL CHAIN LINK FENCE & GATE DETAILS FOOTING N.T.S. NO .,NO TRESPASSING" SIGN TRESPASSING Q ACCES® "AUTHORIZED PERSONNEL ONLY" SIGN AUTHORIZED PERSONNEL NG 0 ® .NO SWIMMING" SIGN SWIMMING SIGNAGE DETAIL N.T.S. BRACE BAND END, CORNER, DR PULL POST BRACE CONNECTION DETAIL N.T.S. EXISTING GROUND LINE 9" LAYER AGGREGATE BASE STONE T-6" 7'-6" 2'-0" J / ROAD SURFACE _ 2 — � 2% 2% 1F" I —► �1 PROPOSED GROUND SURFACE 1 -oll GRASS LINED DRAINAGE DITCH (Z) TYPICAL ROADWAY SECTION 04 N.T.S. CAP CHAIN LINK FENCE 15" DIA. TOP RAIL ( 221' DIA. POST STRETCHER BAR ) CHAIN LINK FENCE 22' DIA. POST TOP OF FENCE SHALL MATCH WITH TOP OF 6-FOOT TALL FENCE TOP OF WALL TENSI N WIRE I a° a1 ° SEE WALL BRACKET DETAIL THIS SHEET END POST NOTES: 1. ALL FENCING AND HARDWARE TO BE INSTALLED IN ACCORDANCE WITH MANUFACTURER'S RECOMMENDATIONS AND SECTION 02830 OF THE SPECIFICATIONS. 2. CHAIN LINK FENCE, RAILS, AND POSTS TO BE PLASTIC COATED. 3. STRETCHER BARS TO BE USED WITH CORNER OR END POST AT ALL HORIZONTAL OR VERTICAL BENDS. 4. CHAIN LINK FENCE FABRIC TO BE PLACED ON OUTSIDE OF POST. 5. REFER TO FENCING SPECIFICATION. 6. FENCING PLACED ON EXISTING RETAINING WALL SHALL HAVE A TOP ELEVATION EQUAL TO THE U-0" FENCING EMBEDDED IN EARTH/ROCK. 10 7. WALL BRACKETS SHALL BE INSTALLED ON THE UPSTREAM (RESERVOIR) SIDE OF THE EXISTING RETAINING WALL. CAP TOP RAIL PASSES THROUGH 1 HOLE IN CAP 1 1g" DIA. TOP RAIL TOP (FF WALL�� TENSION a LV<I aG d`a 36„ ° ,4 \ N / SEE WALL BRACKET DETAIL THIS SHEET INTERIOR POST RETAINING WALL FENCING DETAILS 3" X 3/8" GALVANIZED SIDE MOUNT BRACKET (2 PER POST) FENCE POST — TOP OF WALL N.T.S. 6" TYP. o DRILL/EPDXY 1/2" DIA. STAINLESS STEEL BOLT WITH 6" EMBEDMENT T-0" (4 EACH) DRILL/EPDXY 1/2" DIA. STAINLESS STEEL BOLT o o WITH 6" EMBEDMENT (1 EACH) END CAP (1 PER POST) WALL BRACKET DETAIL J N.T.S. 0 z Q a z w 0 0 a z 0 a U 0 0 m 0, Ya U rr U L^LI LL l < I m m= m I o 1 m J J V� Q 0 Z , ° o Q w om 0 � U w � o i /Oman 0 W Z Lu cw Z VZ yLu r Z W U � Z � (0 C > w w Q W Z U fl� =) O U w O Lu J U Oof = Q LLJ J Q' W 00 Q ((D co Q Q J LL Z v / J Q LIJ 0 O Lu Q J LIJ G PROJECT: 19C 17071.00 DATE: JUNE 30, 2020 SHEET 05 OF 07 u © Schnabel Engineering 2020 All Rights Reserved I I / r Z I / I / I I / / i I / I I \ I l I I I I I I o I I I \ I o \ 1 1 I 1 \ \ \ \ 9'90 \\� TREE LINE (TYP.) \ \ / CDPS \ \ B/M / I —_ CD �0 co I o sso ice! PROPOSED GATE (SEE I DETAIL SHEET 05) \ r \ l I l PROPOSED CHAIN-LINKFENCE E DETAIL SHEET 05) \ CE EXISTING 12 INCH I / I DIA. RCP PROPOSED 15' / WIDE GRAVEL I I 1 \1 1 ACCESS ROAD \ I II —EXISTING CONSTRUCTION I \1 1 I PARKING LOT— _ ENTRANCE I I EXISTING CONTROL I I 1 ROOM ACCESS I II II I I II I // I/ EXISTING OVERHEAD OH / I POWER LINE EXISTING POWER V A N\ \\ POLE (TYP.) I 1 vEXISTING V / \\ HANDRAIL'� / \ HE II I II I 1 11 II A vv (TYP.) I I GENERATOR 1 I I I I 1 1 1 1 \ \ 919, /I I II I 1 1 I 1 I A EXISTING UNDERGROUND POWER LINE \ EXISTING GUARDRAILv \ LIMITS OF DISTURBANCE I I I I I I I I AREA = 9,820 S.F. I I I /• I I I I r l I I X I I Imo' I I I I I I CD / I I I I I,••—.l I � I II II I k / / ••� I \ I Psi I I I CD I I I SF ;< `0 PROPOSED I I � � • 1 � A - CONCRETE BLOCK I A \ RETAINING WALL I A \ \ I II I �\ 1 •� � V A\ \\ I \ SF \\ \,y P \\ SUGAR HOLLOW RESERVIOR_41 P P P / DOUBLE ROW SILT FENCE i / NORMAL POOL / / / / / / / / / PS ELEV = 975.0 B/M / APPROX. LIMITS OF FEMA EXISTING / 100-YEAR FLOODPLAIN DAM LEGEND BJM SOIL STABILIZATION BLANKETS & MATTING CE CONSTRUCTION ENTRANCE CD ROCK CHECK DAM SF SILT FENCE PS PERMANENT SEEDING EROSION AND SEDIMENT CONTROL NOTES: 1. 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 STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 2. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE. 3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. 4. CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN TWO WEEKS OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. 5. CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE. 6. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED. 7. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR 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 PAVED OR PUBLIC ROAD SURFACE, THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER LAND -DISTURBING ACTIVITIES. 8. 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 AUTHORITY. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. O z z z w 0 Q z 0 a U ui 0 m �m x a U_I wm U 11 VJ m= m m J J z 03 Q w =m oE3 Noma CD w, W Z w z V yz W I— z W C)0Z C7 Of 0f�� WW� O 000 ry J J V0Of m W LU W Qom Q � Q J LL z z CW G co oz W J U) a_ zO Q zz 00 OU W PROJECT: 19C17071.00 DATE: JUNE 30, 2020 SHEET 06 OF 07 LM 0 Schnabel Engineering 2020 All Rights Reserved MINIMUM STANDARDS (VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION 4VAC50-30-40) AN EROSION AND SEDIMENT CONTROL PROGRAM ADOPTED BY A DISTRICT OR LOCALITY MUST BE CONSISTENT WITH THE FOLLOWING CRITERIA, TECHNIQUES AND METHODS: 1. 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 STABILIZATION SHALL BE APPLIES WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 14 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 2. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE. 3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. 4. CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE WEEK OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. 5. CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE. 6. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED. 7. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR 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 PAVED OR PUBLIC ROAD SURFACE, THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. 8. 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 AUTHORITY. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. 9. ALL EROSION AND SEDIMENT CONTROL STRUCTURES AND SYSTEMS SHALL BE MAINTAINED, INSPECTED AND REPAIRED AS NEEDED TO INSURE CONTINUED PERFORMANCE OF THEIR INTENDED FUNCTIONS. a. PERIODIC INSPECTIONS ARE REQUIRED BY THE PROPERTY OWNER OR THE PERMITTEE TO ENSURE THAT THE STRUCTURES CONTINUE TO PERFORM AS DESIGNED AND APPROVED IN THE EROSION AND SEDIMENT CONTROL PLAN. A STATEMENT DESCRIBING THE MAINTENANCE RESPONSIBILITIES OF THE PERMITTEE SHALL BE INCLUDED IN THE PLAN. b. ALL DEVICES SHALL BE CHECKED, REPAIRED AND MAINTAINED IMMEDIATELY AFTER ANY RUNOFF PRODUCING STORM EVENT. EROSION AND SEDIMENT CONTROL MEASURES UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, LATEST EDITION. THE MINIMUM STANDARDS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL REGULATIONS SHALL BE SHALL BE ADHERED TO UNLESS OTHERWISE WAIVED OR APPROVED BY A VARIANCE. STRUCTURAL CONTROLS 1. TEMPORARY STONE CONSTRUCTION ENTRANCE (CE) - STD & SPEC 3.02 A STABILIZED STONE PAD WITH FILTER FABRIC UNDERLINER WILL BE INSTALLED AT POINT OF VEHICULAR INGRESS AND EGRESS AS SHOWN ON THE PLANS. IN ADDITION TO THE STONE CONSTRUCTION ENTRANCE, A PAVED WASH RACK WILL BE INSTALLED AS INDICATED ON THE PLANS. 2. CONSTRUCTION ROAD STABILIZATION (CRS) - STD & SPEC 3.03 CONSTRUCTION ACCESS ROADS AND PARKING/STAGING AREAS WILL BE STABILIZED WITH STONE IMMEDIATELY AFTER GRADING AS SHOWN ON THE PLANS. 3. SILT FENCE (SF) - STD & SPEC 3.05 TEMPORARY SEDIMENT BARRIERS WILL BE INSTALLED DOWNSLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT -LADEN RUNOFF FROM SHEET FLOW AS INDICATED ON PLANS. 4. ROCK CHECK DAMS (CD) - STD & SPEC 3.20 SMALL TEMPORARY STONE DAMS SHALL BE CONSTRUCTED ACROSS SWALES OR DRAINAGE DITCHES, AT LOCATIONS SHOWN ON THE PLANS, TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS AND THEREBY REDUCING EROSION OF THE SWALE OR DITCH. VEGETATIVE CONTROLS 1. SURFACE ROUGHENING (SR) - STD & SPEC 3.29 A ROUGH SOIL SURFACE WITH HORIZONTAL DEPRESSIONS CREATED BY OPERATING TILLAGE OR OTHER SUITABLE IMPLEMENT ON THE CONTOUR, OR BY LEAVING SLOPES IN A ROUGHENED CONDITION BY NOT FINE -GRADING THEM SHALL BE PROVIDED TO AID IN THE ESTABLISHMENT OF VEGETATIVE COVER WITH SEED. 2. TEMPORARY SEEDING (TS) - STD & SPEC 3.31 ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF TIME SHALL BE SEEDED WITH FAST GERMINATING TEMPORARY VEGETATION IMMEDIATELY FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR IT IS APPLIED. WINTER STRAW MULCHING SHALL BE APPLIED AT A RATE OF 2 TONS MINIMUM PER ACRE WHEN TEMPORARY SEEDING IS PLACED OUTSIDE OF GROWING SEASON. ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS PLANT DATES SPECIES RATE (LBS./ACRE) SEPT. 1 - FEB. 15 50/50 MIX OF ANNUAL RYE GRASS 50-100 (LOLIUM MULTI-FLORUM) & CEREAL (WINTER) RYE (SECALE CEREALE) FEB. 16 - APR. 30 ANNUAL RYEGRASS 60-100 (LOLIUM MULTI-FLORUM) MAY 1 - AUG. 31 GERMAN MILLET 50 (SETARIA ITALICA) 3. PERMANENT SEEDING (PS) - STD & SPEC 3.32 IMMEDIATELY FOLLOWING FINISH GRADING, A PERENNIAL VEGETATIVE COVER SHALL BE ESTABLISHED ON DISTURBED AREAS BY PLANTING SEED. SEE TABLE 3.32-D BELOW FOR SEEDING MIXTURES. TABLE 3.32-D SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA Total Lbs. Per Acre Minimum Care Lawn - Commercial or Residential 175-200 lbs. - Kentucky 31 or Turf -Type Tall Fescue 95-100% - Improved Perennial Ryegrass 0-5% - Kentucky Bluegrass 0-5% Hieh-Maintenance Lawn 200-2501bs. - Kentucky 31 or Turf -Type Tall Fescue 100% General Slope (3:1 or less) - Kentucky 31 Fescue 128 lbs. - Red Top Grass 2 lbs. - Seasonal Nurse Crop ' 20 lbs. 150 lbs. Low -Maintenance Slope (Steeper than 3:1) - Kentucky 31 Fescue 108 lbs. - Red Top Grass 2 lbs. - Seasonal Nurse Crop ' 20 lbs. - Crownvetch "• 20lbs. 150 lbs. Use seasonal nurse crop in accordance with seeding dates as stated below: February 16tbthrough April ...................... Annual Rye May 1st through August 15th ..................... Foxtail Millet August 16th through October ...................... Annual Rye November through February 15th ................... Winter Rye Substitute Sericea lespedeza for Crownvetch east of Farmville, Va. (May through September use hulled Sericea, all other periods, use unhulled Sericea). If Flatpea is used in lieu of Crownvetch, increase rate to 30 lbs./acre. All legume seed must be properly inoculated. Weeping Lovegrass may be added to any slope or low -maintenance mix during warmer seeding periods; add 10-20 lbs./acre in mixes. 4. SOIL STABILIZATION BLANKETS & MATTING (B/M) - STD & SPEC 3.36 EROSION CONTROL BLANKETS (PROTECTIVE COVERING) OR SOIL STABILIZATION MATS WILL BE INSTALLED OVER SLOPES WHICH HAVE BEEN BROUGHT TO FINAL GRADE AND HAVE BEEN SEEDED TO PROTECT THE SLOPE FROM RILL AND GULLY EROSION AND TO ALLOW SEED TO GERMINATE PROPERLY. 5. DUST CONTROL (DC) - STD & SPEC 3.39 DUST SHALL BE CONTROLLED BY REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING ACTIVITIES AS NEEDED. MANAGEMENT MEASURES 1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE. CONSTRUCTION TRAFFIC SHOULD BE LIMITED TO ACCESS ROADS AND AREAS TO BE GRADED. 2. TEMPORARY SEEDING OR OTHER STABILIZATION MEASURES WILL BE APPLIED IMMEDIATELY AFTER GRADING IS COMPLETED ON THE RESPECTIVE AREAS. 3. AREAS WHICH ARE NOT TO BE DISTURBED WILL BE CLEARLY MARKED BY FLAGS, SIGNS, ETC. 4. RESPONSIBILITY FOR PLAN IMPLEMENTATION SHOULD BE GIVEN TO THE CONSTRUCTION SUPERINTENDENT, AND HE/SHE MAKE ALL CONSTRUCTION WORKERS AWARE OF THE PROVISIONS OF THE PLAN. 5. ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE CHECKED CONTINUOUSLY AND ESPECIALLY AFTER EACH SIGNIFICANT STORM EVEN TO LOCATE AND CONDUCT MAINTENANCE OPERATIONS. MAINTENANCE IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED AFTER A RUNOFF -PRODUCING RAINFALL. THE ENGINEER WILL HAVE A FULL TIME PERSON ON SITE WHO WILL HAVE AS A TASK THE INSPECTION OF THE EROSION CONTROL FEATURES. THE TECHNICAL SPECIFICATIONS REQUIRE THE CONTRACTOR TO INSTALL AND MAINTAIN THE CONTROL FEATURES. THE ENGINEER WILL PROVIDE IN THE DAILY REPORT ANY ISSUES AND CORRECTIVE MEASURES TAKEN FOR THE EROSION CONTROL FEATURES. AFTER ANY SIGNIFICANT RAIN EVENT, SPECIAL ATTENTION WILL BE PAID TO THE OPERATIONS OF THE FEATURES AND WHAT CORRECTIVE MEASURES NEED TO BE TAKEN. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 1. THE TEMPORARY STONE CONSTRUCTION ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOW OF MUD ONTO PUBLIC RIGHT-OF-WAY. 2. BOTH TEMPORARY AND PERMANENT ROADS AND PARKING AREAS MAY REQUIRE PERIODIC TOP DRESSING WITH NEW GRAVEL. 3. THE SILT FENCE BARRIER WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. SEDIMENT DEPOSITS MUST BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES HALF WAY TO THE TOP OF THE BARRIER. 4. CHECK DAMS SHOULD BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EACH RUNOFF -PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHOULD BE MADE TO CONFIRM THAT THE CENTER OF THE DAM IS LOWER THAN THE EDGES. 5. THE SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RE -SEEDED AS NEEDED. STORMWATER RUNOFF THE WORK BEING PERFORM WILL NOT CREATE ANY MEASURABLE ADDITIONAL VOLUME, VELOCITY, OR PEAK FLOW RATE TO THE STREAM BELOW THE DAM. 70' MIN. I J FILTER CLOTif 6" MINI. Al / SIDE ELEVATION GROUND 1 70' MIN. e 12' L VDOT #1 I I � \ POSITIVE DRAINAGE COURSE AGGREGATE 9 TO SEDIMENT TRAPPING DEVICE * MUST EXTEND FULL WIDTH OF INGRESS AND EGRESS PLAN VIEW OPERATION SECTION A -A EXISTING PAVEMENT 5:1 EXISTING PAVEMENT 10' MIN�. N. N. REINFORCED CONCRETE' � DRAIN SPACE SECTION B-B NO SCALESTONE CONSTRUCTION ENTRANCE (WITH WIRE SUPPORT) 1. SET POSTS AND EXCAVATE A 4"X4" 2. STAPLE WIRE FENCING TO THE POSTS. TRENCH UPSLOPE ALONG THE LINE OF POSTS. r FLOW 4 3. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. 100, FLOW EXTENSION OF FABRIC AIIND' FILTER FABRLZ--- \ II 4. BACKFILL AND COMPACT THE EXCAVATED SOIL TIRE INTO THE TRENCH. NO SCALE . - IIF - SILT FENCE CNAI I nW ON SHALLO SLOPES, STRIPS OF NETTING PROTECTIVE COVERINGS MAY BE APPLIED ACROSS THE SLOPE. BERM WHERE THERE IS A BERM AT THE TOP OF THE SLOPE, BRING THE MATERIAL OVER THE BERM AND ANCHOR IT BEHIND THE BERM. ON STEEP SLOPES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. BRING MATERIAL DOWN TO A LEVEL AREA BEFORE TERMINATING THE INSTALLATION TURN THE END UNDER 4" AND STAPLE AT 12 INTERVALS. �.!�, Lr +�•' -+. IN DITCHES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH IF AT ALL POSSIBLE. EROSION CONTROL BLANKET 0 z 0 z w 0 0 a S m om U i U o N d w � C o CO a s c C C ° u u Q m= m c u 3 pp � o m J C J o Q Q u C Z ° ° m0 Q k O3 0 m J 4 Nunn o Z M o W am Um E w =" O C-) W c o z a 3 O a, � o � yLU 0,m� Co w C Y� U IL �o �L �a U) z �- J W Z C) Z 5` W Of � � w am LLl C/) /^J v J coV J 3 rv, w 0 woW Q O LU � 0 ON Q<J vJ LI_ QQ � O � z W O W, PROJECT: 19C17071.00 DATE: JUNE 30, 2020 SHEET 07 OF 07 0 Schnabel Engineering 2020 All Rights Reserved