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Home My WebLink AboutSW3230302_Plansheet - SCM Detail_20230627 i WET POND OPERATION AND PEAKED TRASH RACK WITH ANTI VORTEX PLATE 100 YR ELEV:559.48' - - - - - - - - - - - TOP OF BOX ELEV:557.50 () MAINTENANCE PROVISIONS PAINTED BLACK I I Z Z 2:1 SLOPE,WITH =2'x T HINGED HATCH I I ALIGN WITH STEPS INSIDE ;r' ,I,\��,\ TOP OF BOX ELEV:557.50 . . - - - - a SCM • - • - problems: • • '• problems:problem: problem: SECURE HATCH WITH CHAIN & LOCK ,y;� I I i (CONTRACTOR SHALL PROVIDE& INCLUDE WITH I I I Z The entire SCM Trash/debris is present. Remove the trash/debris. bi An annual inspection by an SHOP DRAWING SUBMITTAL) \�� I I 2'X6"WEIRELEV:557.00 I I - appropriate professional shows Make all needed repairs I I h 1 t1 that the embankment needs immediately. 4"WQ DRAW DOWN 555.50' i`J 1J Regrade the soil if necessary to repair. (SEE DETAIL THIS SHEET) --1 remove the gully,plant ground TOP OF BOX ELEV.557.50 y Areas of bare soil and/or 1"RUNOFF VOLUME I I The perimeter of the wet pond cover and water until it is 'I erosive gullies have formed. established. Provide lime and Clean out the outlet device and ��F I I ELEV.556.9' a one-time fertilizer application. Clogging has occurred. dispose of any sediment in a L I • I gg g location where it will not cause I I The outlet device impacts to streams or the SCM WEIR IN BOX mum Unclog the pipe. Dispose of �"I STEPS 1'-2"O/C The inlet pipe is clogged(if the sediment in a location 2.0'WIDE X 6"FROM TOP ir or replace the outlet @ELEV.557.00 �� applicable). where it will not cause impacts The outlet device is damaged Repa ? DRAINAGE STRUCTURE STEPS I I ALIGN W/OPENING to streams or the SCM. device. Weeds or volunteer trees are The inlet pipe is cracked or Remove the weeds or trees. PRECAST CONCRETE STRUCTURE The inlet device otherwise damaged(if Repair or replace the pipe. Floating wetland island(if growing on the mat. TINDALL UV4848 OR EQUAL ��/ \ /i' �� 36"O RCP applicable). applicable) 48"X 48"INSIDE DIMENSIONS ` I I The anchor cable is damaged, Restore the anchor cable to its (MIN.6"WALL THICKNESS) I I O-RING JTS. I I (704) 439-6521 Regrade the swale if necessary disconnected or missing. design state. I and provide erosion control a 8"DEWATERING PLUG VALVE 550' FIRM #P-1884 1 I Erosion is occurring in the - I 36"Q RCP swale if applicable). devices such as reinforced turf 1 1 THE VALVE SHALL BE AN M&H STYLE -• -<- r ( matting orri ra to avoid future Erosion or other signs of Repair the damage and -�1 = I I WWW.PLOTTHOUNDENGINEERING.COM 9 rip rap 6"PVC 4"ORIFICE \ \ 820 X-CENTRIC VALVE OR APPROVED -a- . erosion pro damage have occurred at the improve the flow dissipation _ ." - P outlet. structure DRAWDOWN .- 36" RCP \ \ / EQUAL.THIS VALVE SHALL BE IN _; INVERT=555.50' �\ i ` ` � ACCORDANCE WITH AWWA C-504 SEC 1_ -° O 36"QJ RCP OUTLET PIPE Search for the source of the The receiving water SEE TURNDOWN PVC ° ' `, sediment and remedy the Discharges from the wet pond ( = `/ - 5.5,AND SHALL BE OPERABLE FROM INV. ELEV:550.00 a" __ a \ Sediment has accumulated to a are causin erosion or Contact the local NCDEQ DETAIL THIS SHEET) THE TOP OF THE OUTLET USE WATER TIGHT BOOT TO SEAL PIPE b \ `, C/� problem if possible. Remove g = =;_ a \\\� `` RQ depth greater than the original sedimentation in the receiving Regional Office. POND A CONNECTION ASTM C923 =; 4 c - \ ,.• """ •., / the sediment and dispose of it 9 g STRUCTURE VIA , design depth for sediment water. (LINKSEAL OR APPROVED EQUIVALENT) storage. in a location where it will not ;s __ - _ _ cause impacts to streams or a SIDE ELEVATION The forebay the SCM. 5'x 5'x 14"CONCRETE POND A OF STRUCTURE - SEDIMENT BASIN CONVERSION NOTE: 8"DEWATERING _° __ NOT TO SCALE Provide additional erosion DEVICE Q; 4' ° 4�`- ANTI-FLOATATION BLOCK = 042�77 _ protection such as reinforced ALL AREAS ABOVE THE PERMANENT POOL SHALL BE PREPARED&SEEDED TO PERMANENT GROUND COVER SPECFICATIONS. INVERT=550.0' a _a_a NOTE: FRONT ELEVATION 2ZZ Erosion has occurred. turf matting or riprap if needed .1 w/��/�3 to prevent future erosion NOT TO SCALE problems. THE PERMANENT WET POND SHALL NOT BE CONSTRUCTED UNTIL THE CONTRIBUTING DRAINAGE AREA IS STABILIZED.ANY SEDIMENT THAT PROVIDE TRASH RACKS FOR ALL OPENINGS ON THE RISER. TYPICALLY THESE ARE REBAR /'' ACCUMULATES WITHIN THE POND SHALL BE REMOVED AND THE FINAL GRADE REESTABLISHED TO THE PROPOSED CONTOURS SHOWN. WELDED TO ANGLE IRON. TRASH RACKS SHOULD PROJECT OUT 6" FROM FACE OF RISER AND i,yAN LIN��\�`x Remove the weeds,preferably EXTEND 6" BELOW WEIR CREST OPENINGS. MAX SPACING BETWEEN BARS IS 3" ////IIIIIIM1��\\\ by hand. If pesticide is used, ° Weeds are present. wipe it on the plants rather than THE PROPOSED STORMWATER MANAGEMENT BMP IS TO BE CONVERTED FROM SEDIMENT AND EROSION CONTROL BASINS. THIS CONVERSION spraying. SHOULD BE COMPLETED AFTER THE ENTIRE DRAINAGE AREA IS STABILIZED AND APPROVAL GIVEN FOR THE LOCAL&STATE AUTHORITY. WET POND OUTLET STRUCTURE Best professional practices THE CONVERSION TO A PERMANENT STORMWATER BMP SHALL BE ACCOMPLISHED BY REGRADING THE BASIN CONTOURS TO THOSE SHOWN ON NOT TO SCALE show that pruning is needed to Prune according to best maintain optimal plant health. Professional practices. THE PLAN AND INSTALLING FILTER MEDIA/UNDERDRAIN PIPING. Determine the source of the ANY SEDIMENT LADEN WATER WITHIN THE SEDIMENT BASIN SHALL BE DRAWN DOWN BY USE OF PUMPS AND DISCHARGES THROUGH A'BLADDER, problem: soils,hydrology, TYPE SYSTEM OR DISPOSED OF OFFSITE IN AN APPROVED SYSTEM. disease,etc. Remedy the Plants are dead,diseased or problem and replace plants. 562 - - - - 562 The vegetated shelf dying. Provide a one-time fertilizer ALL SEDIMENT REMOVED SHALL BE PLACED IN A DESIGNATED SPOIL PILE AND ADEQUATELY PROTECTED WITH EROSION CONTROL MEASURES TOP OF DAM application to establish the AND PERMANENTLY STABILIZED WITH PERMANENT SEEDING. ELEVATION=560.50 ground cover if a soil test 561 - - - - 561 indicates it is necessary. CONTRACTOR IS RESPONSIBLE FOR SUBMITTING CITY OF MONROE FORMS 1-04A(PRE-CONSTRUCTION CERTIFICATION FORM- EMERGENCY SPILLWAY Remove the weeds,preferably POST-CONSTRUCTION STORMWATER BMP)AND 1-04B(FINAL CONSTRUCTION FORM-POST CONSTRUCTION STORMWATER BMP). 560 -ELEVATION=559.00 - 100 - - 560 Weeds are present. by hand. If pesticide is used, (SEE PLAN FOR LOCATION) 100-YR 6-HR PEAK STAGE=559.48 50 O wipe it on the plants rather than spraying. PreBay Main Pond Total 559 - ®s.�_' 50YR 6-HR PEAK STAGE =559.08 10 z5 v� 559 25-YR 6-HR PEAK STAGE =558.83 Search for the source of the Inc. Total p 10-YR 6-HR PEAK STAGE=558.45 1 �Q OQ sediment and sible. emthe Contour Area Avg.Area Volume Volume Area Avg.Area Inc.Volume Total Volume Cum.Volume 558 6' LITORAL 1YR-24HR PEAK STAGE=557.93 - - ^ v - 558 Sediment has accumulated to a problem if possible. Remove TOP OF BOX:557.50 depth greater than the original the sediment and dispose of it E lev ac aC aC-ft ac-ft ac aC aC-ft ac-ft aC-ft � SHELF design sediment storage depth. in a location where it will not ) ) ) ) ) ) ) ) Q cause impacts to streams or 550 0.028 0.000 0.000 0.000 0.030 0.000 0.000 0.000 0.000 557 CO y� 1" RUNOFF VOLUME(53,470 CF)=556.9 - - 557 the SCM. *. 4-6"TOPSOIL The main treatment area 551 0.053 0.040 0.040 0.040 0.374 0.200 0.200 0.200 0.240 556 TOP OF LITTORAL SHELF=556.0 _ _ - - 556 Algal growth covers over50% Consult a professional to 552 0.079 0.070 0.070 0.110 0.418 0.400 0.400 0.600 0.710 __ __ ___ ____PERMANENT POOL ELEVATION =555.50 ___________________- remove and control the algal BOTTOM OF LITTORAL SHELF=555.0 of the area. growth 553 0.107 0.090 0.090 0.200 0.464 0.440 0.440 1.040 1.240 PRECAST CONCRETE BOX - 554 0.137 0.120 0.120 0.320 0.512 0.490 0.490 1.530 1.850 555 - -TYRDAT-AT T8-7 497MS16E61M�� 555 Cattails,phragmites or other Remove the plants by wiping 555 0.168 0.150 0.150 0.470 0.560 0.540 0.540 2.070 2.540 SEE DETAIL,THIS SHEET WATER QUALITY DRAWDOWN �? invasive plants cover 50%of them with pesticide(do not 554 - - 555.5 0.178 0.170 0.085 0.555 0.610 0.590 0.295 2.365 2.920 -STRUCTURE N 554 co the basin surface. spray). SCHEDULE 40 PVC N , 556 0.000 0.080 0.080 0.550 0.866 0.710 0.710 2.780 3.330 Shrubs have started to grow on _ - -(SEE DETAIL,THIS SHEET) O J Remove shrubs immediately. 557 0.000 0.000 0.000 0.550 0.946 0.910 0.910 3.690 4.240 553 FOREBAY 553 the embankment. fn rl 558 0.000 0.000 0.000 0.550 1.029 0.990 0.990 4.680 5.230 MAIN POND '; � Consult a professional to 559 0.000 0.000 0.000 0.550 1.112 1.070 1.070 5.750 6.300 552 - - 552 Evidence of muskrat or beaver 36"RCP 61 LF OF 48"RCP The embankment remove muskrats or beavers activity is present. 560 0.000 0.000 0.000 0.550 1.197 1.150 1.150 6.900 7.450 and repair any holes or erosion. (O-RING JOINTS) �� TO DI Al PROP. RIPRAP APRON 560.5 1.234 1.220 0.366 7.266 7.266 551 - - 36" RCP - - O-RING 551 A tree has started to grow on Consult a dam safety specialist the embankment. to remove the tree. ' INV. =550.0 - U0 WIDTH AT OUTLET. 9 550 - - - - -� 550 Z APRON LENGTH: 30' - (SEDIME3\1T)-` oSEpIMENI9_.- - BOTTOM 54 0 BOTTOM'54 0 LLI 549 WIDTH AT END: 33' 549 - - - - - - D50 = 10 INCHES J Z ANTI-SEEP COLLARS 2 MINIMUM . THICKNESS - 22 INCHES COLLARS TO PROJECT 24"FROM WET DETENTION POND SECTION _ 0 z O YY Y 6' AQUATIC SHELF OUTSIDE OF PIPE. MAINTAIN 24" NOT TO SCALE FROM 555' TO 556' @ SPACING FROM PIPE JOINTS. PROP. 11 LF (SEE DETAIL,THIS SHEET LU O 5 36 6:1 SLOPE AROUND � � 12„ CLASS III O-RING RCP PERIMETER OF -� �- _ \\ \\11\ ', �� _ _ _ - - @ 1.74% (JOINTS PERMANENT POOL a" _ O u G �11 \ \,\1 \\��,\ WRAPPED IN - d " GEOTEXTILE FABRIC \ -- � MIN. 10' WIDE DAMS AT ELEVATION 560.50 < - _ _ 1 ---- `� 1 ,-- THE FOLLOWING PARAMETERS APPLY TO MATERIALS USED TO CONSTRUCT EMBANKMENTS: - a" Sg9 �t�__JI PROP. 20' SPILLWAY BORROW MATERIAL SHALL BE CLASSIFIED AS ML, MH, SC, SM, CL OR CH SOILS ACCORDING TO THE 547 FOREBAY BERM 5 _____� AT ELEV. 559.0' TOP: 555' UNIFIED SOIL CLASSIFICATION SYSTEM (ASTM D2487) OR ANY MIXTURE OF THESE SOILS. NOTES: BORROW MATERIALS SHALL HAVE A LIQUID LIMIT (LL) BETWEEN 40 AND 60 AND A PLASTICITY INDEX(PI) USE SIDE WALLS AND BOTTOM OF TRENCH AS FORM _ WIDTH: 50 BETWEEN 15 AND 30 (ASTM D4318). COMPACT OVER-EXCAVATION TO 95/o DENSITY(PER NCDOT CLASS 'B' RIPRAP ON ASTM D-698) • MATERIALS SHALL BE FREE OF TOPSOIL, ORGANIC MATERIAL, ROOTS, STUMPS, BRUSH, ROCKS LARGER GEOTEXTILE (MIRAFI FILTER THAN 3 INCHES, SUBSOIL, DEBRIS, VEGETATION, AND OTHER FOREIGN MATTER. CONCRETE SHALL BE 3,000-PSI ALL MATERIAL CLODS WILL BE BROKEN DOWN WITH TILLERS AND/OR DISCS TO PROVIDE A HOMOGENEOUS WEAVE 700 OR APPROVED CONCRETE ANTI-SEEP COLLARS 55 --_ _ = SOIL THAT IS FREE OF CLAY CLODS GREATER THAN 3 INCHES IN DIAMETER. 2 � \ EQUIVALENT) TYPICAL SECTION 550, EW NOT TO SCALE k`^56p,`X a \ 6 TYPE P PVC LUG 560 \ \ 556 6" PVC 5 ` � _` \\ 6" PVC TEE '`� � � l J J Z cV `l\ \ '�� \� - _ SS3 \k 5sg \ g\�` MAINTAIN 10"D50 RIPRAP USED p WS TOP OF SPILLWAY DURING EROSION CONTROL PHASES ,J U > 04 @ ELEV.559.00 00 m > � W \ \ I PERM. POOL ELEV: 555.50 Q o 1-- TOP OF DAM Z - j Q \ _ W 0 0 @ELEV.560.50 -�� INSTALL FILTER FABRIC 3-1 UNDER RIPRAP MAIN POND -- -r \ PERMANENT POOL _ _ - _ - - _ - �x RIPRAP APRON ELEV. 555.50' - - - \x o I i -�\ /�� \ _ S _ \ " LENGTH: 26' I I I I I I I I I I I I I I N o \\�1 , \\ \�� I -- /557 SO - I WIDTH @END: 30' N WIDTH @DISCHARGE: 12' Ci r� f _ - -- FOREBAY \ m d50. 11"; dMAX: 16" 1 - co 553_\ THICKNESS: 24" 6" PVC CAP WITH EMERGENCY SPILLWAY ELEVATION 4"ORIFICE NOT TO SCALE w w "' �\ PRECAST 48"X48" ID \\ I \ \\/ / \ \ \\\\ _ 555 y56 �n -� - ----- -560_ \ - a o - s 48" RCP WATER QUALITY o 0 U \ RISER STRUCTURE � \\ , \ \\ \ / _-_\ s \ DRAW DOWN STRUCTURE T@OP OF DAM � TOP OF RISER: 557.0 \ \\\ � \\ l� \ \ 56p�-- ,\\ 65,.E O-RING JOINTS o o U ELEV.560.50 4.0" DRAWDOWN `\ \i \`� I \ \\ \ / - - - - - \ - X 55�- NOT TO SCALE W CY \ \/ _ - - - TOP OF SPILLWAY w w w ORIFICE: 555.50 \ ' \ 56`' _ -, - - - ` \ PROP. V VINYL ELEV.559.00 MAINTAIN 10"D50 RIPRAP USED Z a a a \ / \- @ DURING EROSION CONTROL PHASES z ❑ ❑ 8.0" UNDERDRAIN PIPE: \ \ \ \ , ---- --I -- \ I `\ o w W 550.0 I I COATED CHAIN LINK � U) D \\? �\ �x i/ '` \ _---- I ' � \ \ FENCE AROUND w r Of fy ss� / \ PERIMETER OF WET DIRECTION OF 3 3 r N M N\ �� I -_\ \\ I \\ --" FLOW --- 36" RCP WITH \. \ `\ \\ ) / '� \ I \ / � \, - - " POND 1 � -_-__ __= _--------;•,,\� 1 WATER-TIGHT O-RING THIS DRAWING IS THE PROPERTY OF PLOTT \\ HOUND ENGINEERING AND IS NOT TO BE JOINTS INV. OUT: 550' ` \ \\ \ r7 /^ \ /� \ 3 I \ 5 \ 5 I I - REPRODUCED OR COPIED IN WHOLE OR IN \ \ / PART.IT IS NOT TO BE USED ON ANY OTHER PROJECT AND IS TO BE RETURNED \Y\ \\ \\ \ 1 k �' �� ___ \\ I �\ - ` �i UPON REQUEST. IV =\. �\\\\� \\\ -�\ \ / \� \ --- I I I 4 / 6 , - _ sad � SECTION THROUGH SPILLWAY n r NOT TO SCALE PROJECT NUMBER \ \ \ \ \ I _=a �.� _ _\�_ SCALE: 1 = 40 / \ . . ,.: 42" RCP - "� -�" • \ \\\\ \ \' ' \ \�� 21 .27.008 , 40 20 40 80 160 IMPORTANT NOTE TO CONTRACTOR O-RING JOINTS - -- -" -" -"-" ------ __ AS-BUILTS MUST BE APPROVED BEFORE ISSUANCE OF FINAL PLAT �.j� - 564__------ _ _ \� IN FEET) AND/OR CERTIFICATE OF OCCUPANCY (C.O.). C417 �- _ I inch = 40 ft. OUTLET STRUCTURE 48"x 48"CONCRETE STRUCTURE NOTE: �] SAND FILTER OPERATION & MAINTENANCE PLAN TOP: 578.0' Z z INV. OUT: 574.4' (24" RCP) INSTALL 3"OF ALL SLOPES DRAINING TO SAND FILTER AREAS SHALL BE STABILIZED PER THE NORTH CAROLINA STATE EROSION TOP OF DAM WASHED#3 OR CONTROL &SEDIMENT CONTROL PLANNING & DESIGN MANUAL BEFORE MEDIA IS PLACED. O 0� SAND FILTER MAINTENANCE IS THE RESPONSIBILITY OF THE TENANT AND/OR IT'S DESIGNATED PROPERTY ELEV: 581.0' 44 CRUSHED bi MANAGEMENT ASSOCIATION. STONE OVER DRAINAGE AREA MUST BE STABILIZED BEFORE FILTRATION CONTROLS & FILTER MEDIA ARE INSTALLED. ANY SILT 3:1 SIDE SLOPES FILTER MEDIA CLEANOUT � Z IMPORTANT MAINTENANCE PROCEDURES: (TYPICAL AT ALL BENDS, TOP OF BERM: 578.0 THAT ENTERS THE FACILITY SHALL BE REMOVED BY THE CONTRACTOR AND DISPOSED OF OFFSITE. 6" ABOVE GROUND SECURED a 0 THE DRAINAGE AREA WILL BE CAREFULLY MANAGED TO REDUCE SEDIMENT LOAD TO THE SAND FILTER. 581 EMERGENCY SPILLWAY DAM WITH WATER TIGHT CAP) - 581 _j �7..1 THE SEDIMENTATION CHAMBER OR FOREBAY WILL BE CLEANED OUT WHENEVER SEDIMENT DEPTH EXCEEDS SIX ELEVATION =579.00 - - - - INCHES ONCE A YEAR,SAND MEDIA WILL BE SKIMMED. 580 (SEE PLAN FOR LOCATION) 50 100 580 SEDIMENT BASIN CONVERSION NOTE: 579 - - - - - - - 100YR-6HR PEAK STAGE578.74' 25 - - 579 THE SAND FILTER MEDIA WILL BE REPLACED WHENEVER IT FAILS TO FUNCTION PROPERLY AFTER MAINTENANCE. 50YR-6HR PEAK STAGE-578.58' 10 25YR-6HR PEAK STAGE=578.41' ALL AREAS ABOVE THE PERMANENT POOL SHALL BE PREPARED &SEEDED TO PERMANENT GROUND COVER THE SAND FILTER WILL BE INSPECTED BY A PROFESSIONAL ANNUALY AND WITHIN 24 HOURS AFTER EVERY STORM 578 10YR-6HR PEAK STAGE=578.08' 1 578 SPECFICATIONS. EVENT GREATER THAN 1.0 INCHES. RECORDS OF OPERATION AND MAINTENANCE W2ILL BE KEPT IN A KNOWN SET SAND _ LOCATION AND WILL BE AVAILABLE UPON REQUEST. 577 - - - 1" '� 577 FILTER FOREBAY THE PERMANENT SAND FILTER SHALL NOT BE CONSTRUCTED UNTIL THE CONTRIBUTING DRAINAGE AREA IS INSPECTION ACTIVITIES SHALL BE PERFORMED AS FOLLOWS: ANY PROBLEMS THAT ARE FOUND SHALL BE REPAIRED 576 - - - - V WQ PEAK STAGE 9,843 cf -576.2- 576 STABILIZED. ANY SEDIMENT THAT ACCUMULATES WITHIN THE POND SHALL BE REMOVED AND THE FINAL GRADE IMMEDIATLEY. ( )- (704) 439-6521 575 - - - 575 REESTABLISHED TO THE PROPOSED CONTOURS SHOWN. FIRM #P-1884 BMP ELEMENT: POTENTIAL PROBLEM: HOW I WILL REMEDIATE THE PROBLEM: WWW.PLOTTHOUNDENGINEERING.COM MEDUMAGcoNbiTroNEosoi� " THE PROPOSED STORMWATER MANAGEMENT BMP IS TO BE CONVERTED FROM SEDIMENT AND EROSION ENTIRE BMP TRASH DEBRIS PRESENT REMOVE THE TRASH/DEBRIS 574 - _ (MEDIUM AGGREGATE CONCRETE - - 574 - SANDASTMC33 _ _ _ CONTROL BASINS. THIS CONVERSION SHOULD BE COMPLETED AFTER THE ENTIRE DRAINAGE AREA IS STABILIZED ADJACENT PAVEMENT SEDIMENT IS PRESENT ON THE REGRADE THE SOIL IF NECESSARY TO K-- '" (IF APPLICABLE) PAVEMENT SURFACE REMOVE THE GULLY,AND THEN PLANT A 573 1 - - 573 AND APPROVAL GIVEN FOR THE LOCAL &STATE AUTHORITY. \\\��IIIIIII////��/ GROUND COVER AND WATER UNTIL IT IS INV.OF 24"RCP OUTLET \\`\\\�� C Q RO //i ESTABLISHED.PROVIDE LIME AND A ELEV.574.4 `\ �'' ` 572 - @ - CLASS B RIPRAP BERM FACED - 572 THE CONVERSION TO A PERMANENT STORMWATER BMP SHALL BE ACCOMPLISHED BY REGRADING THE BASIN Q�OFESS/ ONE-TIME FERTILIZER APPLICATION. WITH#57 WASHED STONE CONTOURS TO THOSE SHOWN ON THE PLAN AND INSTALLING FILTER MEDIA/UNDERDRAIN PIPING. li , VEGETATION IS TOO SHORT OR TOO MAINTAIN VEGETATION AT AN 571 - - (3:1 SIDE SLOPES) - 571 LONG. APPROPRIATE HEIGHT. ANY SEDIMENT LADEN WATER WITHIN THE SEDIMENT BASIN SHALL BE DRAWN DOWN BY USE OF PUMPS AND = ` 042077 - PERMEABLE NON-WOVEN 570 - - 6" PVC DRAIN 1% SLOPE - 570 � •••. �v/15/23 :• FLOW DIVERSION STRUCTURE THE STRUCTURE IS CLOGGED. UNCLOG THE CONVEYANCE AND FILTER FABRIC ABOVE, BELOW DISCHARGES THROUGH A BLADDER TYPE SYSTEM OR DISPOSED OF OFFSITE IN AN APPROVED SYSTEM. &SIDES OF SAND LAYER (2 PER RIP-RAP SECTION OF .� •. �. DISPOSE OF ANY SEDIMENT OFFSITE. 569 BERM -SEE PLAN VIEW) 569ALL SEDIMENT REMOVED SHALL BE PLACED IN A 'NGINv- THE STRUCTURE IS DAMAGED. MAKE ANY NECESSARY REPAIRS OR 6" MIN. UNDERDRAIN GRAVEL BED ERGS ON CONTROL MEASURES AND PERMANENTDLY SITABI IZED WITH PERMANENTGNATED SPOIL PILE AND OSEED NG UATELY PROTECTED WITH ,��Pyq'Nii��N�\0�\\\ REPLACE IF DAMAGE IS TOO LARGE FOR NOTE. REPAIR. A PUMP MAY BE REQUIRED TO DE-WATER THE SAND FILTER FOR MAINTENANCE WRAPPED IN FILTER FABRIC(#57 WASHED STONE)WITHIN 4'WIDE FOREBAY OR PRETREATMENT SEDIMENT HAS ACCUMULATED TO A SEARCH FOR THE SOURCE OF THE TRENCH. AREA DEPTH OF GREATER THAN SIX SEDIMENT AND REMEDY THE PROBLEM IF INCHES. POSSIBLE.REMOVE THE SEDIMENT AND PROP. SAND FI LTERSTABILIZE OR DISPOSE OF IT IN A PERFORATED 6" DIA. UNDERDRAIN PIPE o.5o°i° MIN. SLOPE THE FOLLOWING PARAMETERS APPLY TO MATERIALS USED TO CONSTRUCT EMBANKMENTS: LOCATION WHERE IT WILL NOT CAUSE (SCH. 40 PVC OR DOUBLE WALL HDPE. IMPACTS TO STREAMS OR THE BMP. PERFORATIONS SHOULD BE$" DIA. SPACED 6" TYPICAL CROSS SECTION ON-CENTER ALONG 2 LONGITUDINAL ROWS BORROW MATERIAL SHALL BE CLASSIFIED AS ML, MH, SC, SM, CL OR CH SOILS ACCORDING TO THE EROSION HAS OCCURRED. PROVIDE ADDITIONAL EROSION UNIFIED SOIL CLASSIFICATION SYSTEM (ASTM D2487) OR ANY MIXTURE OF THESE SOILS. PROTECTION SUCH AS REINFORCED NOT TO SCALE SPACED MIN. 10'@ 90-APART) TURF MATTING OR RIPRAP IF NEEDED BORROW MATERIALS SHALL HAVE A LIQUID LIMIT (LL) BETWEEN 40 AND 60 AND A PLASTICITY INDEX (PI) TO PREVENT FUTURE EROSION BETWEEN 15 AND 30 (ASTM D4318). PROBLEMS. MATERIALS SHALL BE FREE OF TOPSOIL, ORGANIC MATERIAL, ROOTS, STUMPS, BRUSH, ROCKS LARGER WEEDS ARE PRESENT. REMOVE THE WEEDS,PREFERABLY BY THAN 3 INCHES, SUBSOIL, DEBRIS, VEGETATION, AND OTHER FOREIGN MATTER. HAND. IF A PESTICIDE IS USED,WIPE IT ALL MATERIAL CLODS WILL BE BROKEN DOWN WITH TILLERS AND/OR DISCS TO PROVIDE A HOMOGENEOUS ON PLANTS RATHER THAN SPRAYING. DESIGN VOLUME: SOIL THAT IS FREE OF CLAY CLODS GREATER THAN 3 INCHES IN DIAMETER. FILTER BED AND UNDERDRAIN WATER IS PONDING ON THE SURFACE CHECK TO SEE IF THE COLLECTOR COLLECTION SYSTEM FOR MORE THAN 24 HOURS AFTER A SYSTEM IS CLOGGED AND FLUSH IF FOREBAY SAND FILTER STORM. NECESSARY. IF WATER STILL PONDS, INC. CUM. INC. CUM. REMOVE THE TOP FEW INCHES OF ELEV AREA AREA VOLUME VOLUME ELEV AREA AREA VOLUME VOLUME -- FILTER BED MEDIA AND REPLACE. IF WATER STILL PONDS,THEN CONSULT AN FT SF AC AF AF FT SF AC AF AF PEAKED PAINTED METAL TRASH RACK WITH ANTI } EXPERT. VORTEX PLATE BOLTED TO CONCRETE STRUCTURE 575 6224 0.1429 0.0000 0.0000 575 1334 0.0306 0.0000 0-0000 2:1 SLOPE,WITH=2'x S HINGED HATCH z_ OUTLET DEVICE CLOGGING HAS OCCURRED. CLEAN OUT THE OUTLET DEVICE. 576 7192 0.1651 0.1540 0.1540 576 1812 0.0416 0.0361 0.0361 ALIGN WITH STEPS INSIDE DISPOSE OF THE SEDIMENT OFFSITE. SECURE HATCH WITH CHAIN&LOCK o THE OUTLET DEVICE IS DAMAGED. REPAIR OR REPLACE THE OUTLET 577 8210 0.1885 0-1768 0.3308 577 2353 0.0540 0.0478 0-0839 N - w DEVICE 578 9279 0.2130 0.2007 0.5315 578 2958 0.0679 0.0610 0-1449 I�II � V, 1 IEJ RECEIVING WATER EROSION OF OTHER SIGNS OF CONTACT THE NC DIVISION OF WATER I" _ DAMAGE HAVE OCCURRED AT THE QUALITY 401 OVERSIGHT UNIT AT TOP OF BOX ELEV.578.0 DRAINAGE STRUCTURE STEPS - Total Volume= 0.5315 AF Total Volume= 0.1449 AF a OUTLET. 919-733-1786. - 23,154 CF 6,311 CF I - � LL = L-111 • - -T \ 6"x36"ORIFICE Lij NOTE: INV.@ ELEV.577.5 to PRECAST CONCRETE STRUCTURE w FOREBAY(SEDIMENT CHAMBER) OF SANDFILTER B IS OVERSIZED FOR STORAGE. TINDALL UV4848 OR EQUAL OUTLET STRUCTURE •• •• I Q 48"X 48"INSIDE DIMENSIONS I U WQv IS 9,843 CF. MIN. VOLUME OF EACH CHAMBER IS 50% OF WQv (4,922 CF) I (MIN.6"WALL THICKNESS) I 92" 12" V z ' LLI OUTLET PIPE J O 1"WQ ELEV.576.2 / I :%'� I \\ 0/ z 1 3500 PSI CONCRETE ANTI-SEEP COLLAR TYP. ,1 LU NOTES: rn LL LL USE SIDE WALLS AND BOTTOM OF TRENCH AS FORM `� + _ 7� \ / \ COMPACT OVER-EXCAVATION TO 95% DENSITY(PER ASTM D-698) b 0- z z / \ \ CONCRETE SHALL BE 3,000-PSI N RIPRAP APRON ___ \ BOTTOM ELEV.575.00 \ FLGP CONCRETE ANTI-SEEP COLLAR WIDTH @ END: 26' L\ a4 \ "'�= -� }__ � - _ --� '•- i ss�� I ;- _- III III III III III-III �' I I STANDARD DETAIL WIDTH @ DISCHARGE: 10' \ \ �� - �-_i - _ T \ I 1 - - \ \ P =_--;-� °, ==�= ss I I I air �� `/ NOT TO SCALE d50: 11', dMAX: 16" THICKNESS: 24" / s == "` .•� 5 s8 _ ,s _,�=_- y B1 RIPRAP APRON LENGTH: 16' \/ 6"UNDERDRAIN WIDTH @ END: 19' p`b CONNECTION 6" PVC UNDERDRAINS @WIDTH @DISCHARGE: 8' 1 INVERT-574.5' a -'q=z»=. ,'_-_- / I I d 6"; d 9" / / TOP OF SPILLWAY CONCRETE ANTI-SEEP MIN. 0.5/a SLOPE �. 50 MAX- / \/ / INV.OF 24"RCP OUTLET @ELEV.579 MAINTAIN 10"D50 RIPRAP USED ( ) \\\ \\ 1 (THICKNESS: 14" \ M 2 / \ / @ ELEV.574.4 OUTLET STRUCTURE COLLARS TYP. \ NOT TO SCALE DURING EROSION CONTROL PHASES INSTALL FILTER FABRIC I - TOP OF DAM �� 580 57 I I I i I I UNDER RIPRAP @ ELEV.581.0 PRECAST 48 X48 ID \\ - RISER STRUCTURE �� 3:1 2p' 3:1 TOP OF RISER: 578.0' WATER QUALITY VOL: \ \ e= t PROP. SAND Co \ \ - s � _ \` N\ \\� \ ''=s =.Y FILTER BMP \ \ �� I , m N 9,843 CF \ , : NCDEQ,STD. C-6\ \ \ `\ z N WQ ORIFICE: 576.3 \\ \\ �� FOREBAY \ o 24" RCP WITH \\ \a\\>\�\ \ \\ 01 5S� SSE B15 RIPRAP APRON h EMERGENCY SPILLWAY ELEVATION z 0" Q LENGTH: 16' \ \ ` 24" XX" 24" 12„ NOT TO SCALE LU 0 I, WATER-TIGHT O-RING \ --_\ \ \ \ \ �5 \ \ \ FACE OF OUTLET STRUCTURE JOINTS INV. OUT: 574.4' WIDTH @END: 18' WIDTH @ DISCHARGE: 6' \• `d 1 / '575- \_� \.\\ \ 5 \ _ _ �\ \\ d50: 6"; dMAX: 9„ I • ORIFICE SAND FILTER \ \ \,`\ \ \\ F E �gR� \ \ THICKNESS: 14" \\ -- y °- a :a- - TOP OF DAM N N`\ \ \ N �' \ \ \� BARREL °- y TOP OF SAND ELEV: 575.0 �� `\ \ ` \ \ '�\�6 - I a`_ - @ELEV.581.0 N a a \ \ - SDE \ _ \ \ 451, �°-- N N iri TOP OF SAND AREA: 1,000-SF 576 ----__ _ \ \\\� \ \ \ \ \\ \ \ \ � \ •� \ \\ _ \ - ` 9 ` _ ° TOP OF SPILLWAY MAINTAIN 10"D50 RIPRAP USED N. - U) 1 ---577--- ___-__ \\ ` \ \ \ 1•17 \ \ - - z Z w \\ - - \ \ \ \ ` \ \ L ° - @ DURING EROSION CONTROL PHASES LLj LLI _ � \ \ 5'GRASSED -- \- s `\ \ \ \\ \\ \\ \ `\ _ 0 _ \ __ \\ �- a \\\ �,�\ \\ \\ \\ \� NOTES: 4 0 o LEVEL \ `\ \\ \� USE SIDE WALLS AND BOTTOM OF TRENCH AS DIRECTION OF _,� 3 � 0 a CONTRACTOR TO CUSTOM FABRICATE HOOD 3 - - --- - --- =�� z z w �I SPREADER _ - _----- / \`�^ \ ` `\ _\ \� `\ 1 \ \ \ `\ `\ / \ \ FORM FROM PERFORATED SHEET METAL OR EQUIV. MATERIALS FLOW - -- - - - 1 � � U\ \ \ \ \ 1 � o s> \\ 1 - `\ \\ \\ \ `\ - _ \ `\ \ COMPACT OVER-EXCAVATION TO 95% DENSITY ATTACH AS NECESSARY TO OUTSIDE OF OUTLET STRUCTURE I I I I I � � z (PER ASTM D-698) TO COVER ORIFICE TO 6"BELOW INVERT. I I I - I�\�� w w CONCRETE SHALL BE 3,000-PSI I - a a COLLARS TO PROJECT 24" FROM OUTSIDE OF PIPE. O_ W w w \ -___ \\ \- \- \ \• \\ \ l! - MAINTAIN 24"SPACING FROM PIPE JOINTS. > `n \ °� _ \ �:,-\ '-,_ _ \ . ORIFICE HOOD DETAIL w W w SECTION THROUGH SPILLWAY w � fy NOT TO SCALE Z - N co NOT TO SCALE NOTE: THIS DRAWING IS THE PROPERTY OF PLOTT HOUND ENGINEERING AND IS NOT TO BE PROVIDE TRASH RACKS FOR ALL OPENINGS ON THE RISER. TYPICALLY THESE REPRODUCED OR COPIED IN WHOLE OR IN ARE REBAR WELDED TO ANGLE IRON. TRASH RACKS SHOULD PROJECT OUT 6" PART.IT IS NOT TO IS USED E ANY OTHER PROJECT AND IS TO BE RETURNED FROM FACE OF RISER AND EXTEND 6" BELOW WEIR CREST OPENINGS. MAX UPON REQUEST. SPACING BETWEEN BARS IS 3" IMPORTANT NOTE TO CONTRACTOR 40 o zo 4o so Iso PROJECT NUMBER AS-BUILTS MUST BE APPROVED BEFORE ISSUANCE OF FINAL PLAT 21 .27.008 SCALE: 1" = 40' AND/OR CERTIFICATE OF OCCUPANCY (C.O.). (IN FEET) AS-BUILT SAND FILTERS PRIOR TO MEDIA BEING PLACED OVER C418 I inch= 40 ft. UNDERDRAINS. OUTLET STRUCTURE NOTE: a SAND FILTER OPERATION & MAINTENANCE PLAN TOP OF DAM 48"x 48"CONCRETE STRUCTURE Z z ALL SLOPES DRAINING TO SAND FILTER AREAS SHALL BE STABILIZED PER THE NORTH CAROLINA STATE EROSION ELEV: TOP: CONTROL &SEDIMENT CONTROL PLANNING & DESIGN MANUAL BEFORE MEDIA IS PLACED. � 3:1 SIDE SLOPPESEE INV. OUUT:T: 549.50' (24" RCP) O W SAND FILTER MAINTENANCE IS THE RESPONSIBILITY OF THE TENANT AND/OR IT'S DESIGNATED PROPERTY Z bi MANAGEMENT ASSOCIATION. DRAINAGE AREA MUST BE STABILIZED BEFORE FILTRATION CONTROLS & FILTER MEDIA ARE INSTALLED. ANY SILT Z IMPORTANT MAINTENANCE PROCEDURES: THAT ENTERS THE FACILITY SHALL BE REMOVED BY THE CONTRACTOR AND DISPOSED OF OFFSITE. 3"OF THE DRAINAGE AREA WILL BE CAREFULLY MANAGED TO REDUCE SEDIMENT LOAD TO THE SAND FILTER. 558 EMERGENCY SPILLWAY INSTALL 558 ,J z ELEVATION =556.00 DAM WASHED#3 OR CLEANOUT CL Ljj THE SEDIMENTATION CHAMBER OR FOREBAY WILL BE CLEANED OUT WHENEVER SEDIMENT DEPTH EXCEEDS SIX 557 (SEE PLAN FOR LOCATION) #4 CRUSHED - (TYPICAL AT ALL BENDS, - TOP OF BERM: 553.0 557 INCHES ONCE A YEAR,SAND MEDIA WILL BE SKIMMED. STONE OVER 6" ABOVE GROUND SECURED 556 - - - - FILTER MEDIA WITH WATER TIGHT CAP) - - - - 556 SEDIMENT BASIN CONVERSION NOTE: `� THE SAND FILTER MEDIA WILL BE REPLACED WHENEVER IT FAILS TO FUNCTION PROPERLY AFTER MAINTENANCE. M-W�- 2 100YR-6HR PEA STAGE=554.57' 555 ALL AREAS ABOVE THE PERMANENT POOL SHALL BE PREPARED &SEEDED TO PERMANENT GROUND COVER THE SAND FILTER WILL BE INSPECTED BY A PROFESSIONAL ANNUALY AND WITHIN 24 HOURS AFTER EVERY STORM 555 - 10 50YR-6HR PEAK STAGE=554.40' EVENT GREATER THAN 1.0 INCHES. RECORDS OF OPERATION AND MAINTENANCE W2ILL BE KEPT IN A KNOWN SET 25YR-6HR PEAK STAGE=554.22' SPECFICATIONS. LOCATION AND WILL BE AVAILABLE UPON REQUEST. 554 - - - - - - - 10YR-6HR PEAK STAGE=554.08'554 THE PERMANENT SAND FILTER SHALL NOT BE CONSTRUCTED UNTIL THE CONTRIBUTING DRAINAGE AREA IS INSPECTION ACTIVITIES SHALL BE PERFORMED AS FOLLOWS: ANY PROBLEMS THAT ARE FOUND SHALL BE REPAIRED 553 - - - - 553 STABILIZED. ANY SEDIMENT THAT ACCUMULATES WITHIN THE POND SHALL BE REMOVED AND THE FINAL GRADE IMMEDIATLEY. SAND 3 REESTABLISHED TO THE PROPOSED CONTOURS SHOWN. FIR 439-65 4 552 - - - FILTER � FOREBAY 552 FIRM #P-1884 BMP ELEMENT: POTENTIAL PROBLEM: HOW I WILL E TRASH/DEBRIS THE PROBLEM: THE PROPOSED STORMWATER MANAGEMENT BMP IS TO BE CONVERTED FROM SEDIMENT AND EROSION WWW.PLOTTHOUNDENGINEERING.COM ENTIRE BMP TRASH DEBRIS PRESENT REMOVE THE TRASH/DEBRIS 551 - 1"WQ PEAK STAGE(6562 CF)=551.2' 551 ADJACENT PAVEMENT SEDIMENT IS PRESENT ON THE REGRADE THE SOIL IF NECESSARY TO CONTROL BASINS. THIS CONVERSION SHOULD BE COMPLETED AFTER THE ENTIRE DRAINAGE AREA IS STABILIZED (IF APPLICABLE) PAVEMENT SURFACE REMOVE THE GULLY,AND THEN PLANT A 550 - - 550 AND APPROVAL GIVEN FOR THE LOCAL &STATE AUTHORITY. \\��\��IIIIII///////� GROUND COVER AND WATER UNTIL IT IS 't°i� Tras.�;k --_ �� C Q RQ ESTABLISHED.PROVIDE LIME AND A 549a`` `'�' �`" -` - > _ 549 THE CONVERSION TO A PERMANENT STORMWATER BMP SHALL BE ACCOMPLISHED BY REGRADING THE BASIN ONE-TIME FERTILIZER APPLICATION. CONTOURS TO THOSE SHOWN ON THE PLAN AND INSTALLING FILTER MEDIA/UNDERDRAIN PIPING. q VEGETATION IS TOO SHORT OR TOO MAINTAIN VEGETATION AT AN 548 - - 548 = _ LONG. APPROPRIATE HEIGHT. 547 CLASS B RIPRAP BERM FACED 547 ANY SEDIMENT LADEN WATER WITHIN THE SEDIMENT BASIN SHALL BE DRAWN DOWN BY USE OF PUMPS AND = ` 042077 - - - - - - - - - = FLOW DIVERSION STRUCTURE THE STRUCTURE IS CLOGGED. UNCLOG THE CONVEYANCE AND WITH#57 WASHED STONE DISCHARGES THROUGH A'BLADDER' TYPE SYSTEM OR DISPOSED OF OFFSITE IN AN APPROVED SYSTEM. (11513 DISPOSE OF ANY SEDIMENT OFFSITE. 546 - - - (3:1 SIDE SLOPES) 546 /�'ii� �'FNGINV- THE STRUCTURE IS DAMAGED. MAKE ANY NECESSARY REPAIRS OR PERMEABLE NON-WOVEN ALL SEDIMENT REMOVED SHALL BE PLACED IN A° EROS ON CONTROL MEASURES AND PERMANENTDLY SITABI IZED WITH PERMANENTGNATED SPOIL PILE AND QSEED NG UATELY PROTECTED WITH N114Nii��N�O��\�� REPLACE IF DAMAGE IS TOO LARGE FOR FILTER FABRIC ABOVE, BELOW (2 PVC DRAIN 1 /° SLOPE /// \\ REPAIR. &SIDES OF SAND LAYER B PER RIP-RAP SECTION OF FOREBAY OR PRETREATMENT SEDIMENT HAS ACCUMULATED TO A SEARCH FOR THE SOURCE OF THE NOTE: BERM -SEE PLAN VIEW) AREA DEPTH OF GREATER THAN SIX SEDIMENT AND REMEDY THE PROBLEM IF A PUMP MAY BE REQUIRED TO DE-WATER THE SAND FILTER FOR MAINTENANCE 6" MIN. UNDERDRAIN GRAVEL BED INCHES. POSSIBLE.REMOVE THE SEDIMENT AND WRAPPED IN FILTER FABRIC(457 STABILIZE OR DISPOSE OF IT IN A WASHED STONE)WITHIN 4'WIDE THE FOLLOWING PARAMETERS APPLY TO MATERIALS USED TO CONSTRUCT EMBANKMENTS: LOCATION WHERE IT WILL NOT CAUSE TRENCH. IMPACTS TO STREAMS OR THE BMP. PROP. SAND FILTER BORROW MATERIAL SHALL BE CLASSIFIED AS ML, MH, SC, SM, CL OR CH SOILS ACCORDING TO THE EROSION HAS OCCURRED. PROVIDE ADDITIONAL EROSION PERFORATED 6" DIA. UNDERDRAIN PIPE 0.5D% MIN. SLOPE UNIFIED SOIL CLASSIFICATION SYSTEM (ASTM D2487) OR ANY MIXTURE OF THESE SOILS. PROTECTION SUCH AS REINFORCED (SCH. 40 PVC OR DOUBLE WALL HDPE. • BORROW MATERIALS SHALL HAVE A LIQUID LIMIT (LL) BETWEEN 40 AND 60 AND A PLASTICITY INDEX (PI) TURF MATTING OR RIPRAP IF NEEDED s TO PREVENT FUTURE EROSION PERFORATIONS SHOULD BE s DIA. SPACED 6" BETWEEN 15 AND 30 (ASTM D4318). PROBLEMS. TYPICAL CROSS SECTION ON-CENTER ALONG 2 LONGITUDINAL ROWS MATERIALS SHALL BE FREE OF TOPSOIL, ORGANIC MATERIAL, ROOTS, STUMPS, BRUSH, ROCKS LARGER WEEDS ARE PRESENT. REMOVE THE WEEDS,PREFERABLY BY NOT TO SCALE SPACED MIN. 10'@ 90°APART) THAN 3 INCHES, SUBSOIL, DEBRIS, VEGETATION, AND OTHER FOREIGN MATTER. HAND. IF A PESTICIDE IS USED,WIPE IT a ALL MATERIAL CLODS WILL BE BROKEN DOWN WITH TILLERS AND/OR DISCS TO PROVIDE A HOMOGENEOUS ON PLANTS RATHER THAN SPRAYING. SOIL THAT IS FREE OF CLAY CLODS GREATER THAN 3 INCHES IN DIAMETER. FILTER BED AND UNDERDRAIN WATER IS PONDING ON THE SURFACE CHECK TO SEE IF THE COLLECTOR COLLECTION SYSTEM FOR MORE THAN 24 HOURS AFTER A SYSTEM IS CLOGGED AND FLUSH IF STORM. NECESSARY. IF WATER STILL PONDS, REMOVE THE TOP FEW INCHES OF FILTER BED MEDIA AND REPLACE. IF WATER STILL PONDS,THEN CONSULT AN PEAKED PAINTED METAL TRASH RACK WITH ANTI EXPERT. VORTEX PLATE H BOLTED TO CONCRETE STRUCTURE z OUTLET DEVICE CLOGGING HAS OCCURRED. CLEAN OUT THE OUTLET DEVICE. 2:1 SLOPE,WITH=2'x T HINGED HATCHALIGN WITH STEPS INSIDE DISPOSE OF THE SEDIMENT OFFSITE. SECURE HATCH WITH CHAIN&LOCK o THE OUTLET DEVICE IS DAMAGED. REPAIR OR REPLACE THE OUTLET I�I,IG� Cj DEVICE IEJ IJ RECEIVING WATER EROSION OF OTHER SIGNS OF CONTACT THE NC DIVISION OF WATER DAMAGE HAVE OCCURRED AT THE QUALITY 401 OVERSIGHT UNIT AT TOP OF BOX ELEV.554.00 DRAINAGE STRUCTURE STEPS - OUTLET. 919-733-1786. L-111 ° - -T 12"x24"ORIFICE I \ w INV.@ ELEV.553.00 I / ` 1 DESIGN VOLUME: OUTLET STRUCTURE 1 Io PRECAST CONCRETE STRUCTURE I W �� TINDALL UV4848 OR EQUAL 48"X 48"INSIDE DIMENSIONS _ _ FOREBAY SAND FILTER I (MIN.6"WALL THICKNESS) 0.50" I 1-2" 1-2" / z L.L INC. CUM. INC. CUM. - �I~ �� LIJ ELEV AREA AREA VOLUME VOLUME ELEV AREA AREA VOLUME VOLUME I - - - - - - J = a = a 0 W FT SF AC AF AF FT SF AC AF AF OUTLET PIPE O 550 3670 0.0843 0.0000 0.0000 550 912.5 0.0209 0.0000 0.0000 i I \ z J 551 4989 0.1145 0.0994 0.0994 551 1309 0.0301 0.0255 0.0255 1 1 3500 PSI CONCRETE ANTI-SEEP COLLAR TYP. a - LL 552 6411 0.1472 0.1309 0.2302 552 1776 0.0408 0.0354 0-0609 W i \ I 553 7937 0.1822 0.1647 0.3949 553 2221 0.0510 0.0459 0.1068 / I NOTES: LL LL. 1"W rn ELEV.551.2 / I i USE SIDE WALLS AND BOTTOM OF TRENCH AS FORM `� + _Total Volume 0.3949 AF Total Volume 0.1068 AF � COMPACT OVER-EXCAVATION TO 95% DENSITY(PER ASTM D-698) b 0- z z = = I - \ \ o 17,204 CF 4,652 CF CONCRETE SHALL BE 3,000-PSI N U) NOTE: BOTTOM ELEV.550.00 \ CONCRETE ANTI-SEEP COLLAR 0 FOREBAY (SEDIMENT CHAMBER) OF SANDFILTER B IS OVERSIZED FOR STORAGE. IIIIIIIIIIIIIII-III ) ) WQv IS 6,562 CF. MIN.VOLUME OF EACH CHAMBER IS 50% OF WQv(3,281 CF) 0 2 STANDARD DETAIL C) `%F ! `� NOT TO SCALE 19 18 f- y 17 A 15 16 / a 1 1 / 1�'F j o i' 6"UNDERDRAIN " / / � CONNECTION � �I �i� �i' j/ / INVERT=549.5' INV.OF 24"RCP OUTLET TOP OF SPILLWAY 1 I i , / / 560 @ ELEV.549.50 1 I 1 13 i / / @ELEV.556.0 MAINTAIN 10"D50 RIPRAP USED 12 ,' ,' ; / PROP. - \�� SAND ' / OUTLET STRUCTURE DURING EROSION CONTROL PHASES �10 �� SAND FILTER 559 ,i �1' FILTER C ,' NOT TO SCALE INSTALL FILTER FABRIC TOP OF DAM .�\ TOP OF SAND ELEV: 550.0 �i 1�3, 555/ ° / ,� �` UNDER RIPRAP @ ELEV.558.0 TOP OF SAND AREA: 740-SF ' 3as/ /i' / 3:1 3:1 / 20 fN 5 ' sD ti yam; = J J Z N LLJ :v EMERGENCY SPILLWAY ELEVATION ------- - � � 36"WALL AT CENTER has _ ' i�i TO PREVENT FILL / XX" 24" FACE OF OUTLET STRUCTURE NOT TO SCALE w LO Cl -3`------ ' s INTO THE BUFFER 24" 12�� Fri � - ---- E_ 58 5 �' �� °_ =_ ORIFICE C1 RIPRAP APRON LENGTH: 13' / die_ j I- a TOP OF DAM N co N N CD WIDTH @ END: 16' \BARREL J a<°- ;a _ @ELEV.558.0 N N _ - WIDTH @ DISCHARGE: 6' - - / = _ = _ N r -_ __-- 50 MAX: C PRECAST 48 X48 ID _ a a TOP OF SPILLWAY MAINTAIN 1-IT0"D50 RIPRAP USED U) - - THICKNESS: 11" RISER STRUCTURE - a a - ° °P - @ ELEV.556.0 DURING EROSION CONTROL PHASES z Ljj TOP OF RISER: 554.0 Z _ ---- / - ' 4 W '--- WATER QUALITY VOL: NOTES: _ ' o 0 0 DIRECTION OF -- - - U U = q - USE SIDE WALLS AND BOTTOM OF TRENCH AS CONTRACTOR TO CUSTOM FABRICATE HOOD FLOW 3 _ __-__--� -__-- -�� 3 Uj Uj -- / 6,562 CF FROM PERFORATED SHEET METAL OR EQUIV. MATERIALS � 1 � � 0 FORM 1 .- o / WQ ORIFICE: 551.5' ATTACH AS NECESSARY TO OUTSIDE OF OUTLET STRUCTURE I 1 I I Z GRASSED LEVEL ------ COMPACT OVER-EXCAVATION TO 95% DENSITY TO COVER ORIFICE TO 6"BELOW INVERT. = I- ' I '.� fy _ - SPREADER / CONCRETM TE TE DSHABLL BE 3,000-PSI I I 1 - OZ 0- 24" 0 0 I co w w w RCP WITH W Uj W COLLARS TO PROJECT 24" FROM OUTSIDE OF PIPE. u) LO �Q WATER-TIGHT O-RING MAINTAIN 24"SPACING FROM PIPE JOINTS. ORIFICE HOOD DETAIL w w w CONCRETE ANTI-SEEP / JOINTS INV. END: 549.0' SECTION THROUGH SPILLWAY w fy COLLARS (TYP.) / NOT TO SCALE NOT TO SCALE r N _7 / NOTE: THIS DRAWING IS THE PROPERTY OF PLOTT HOUND ENGINEERING AND IS NOT TO BE PROVIDE TRASH RACKS FOR ALL OPENINGS ON THE RISER. TYPICALLY THESE ARE REBAR REPRODUCED OR COPIED IN WHOLE OR IN C OF RIPRAP APRON WELDED TO ANGLE IRON. TRASH RACKS SHOULD PROJECT OUT 6" FROM FACE OF RISER AND PART.IT IS NOT TO BE USED ON ANY OTHER PROJECT AND IS TO BE RETURNED LENGTH: 15' EXTEND 6" BELOW WEIR CREST OPENINGS. MAX SPACING BETWEEN BARS IS 3" UPON REQUEST. WIDTH @ END: IMPORTANT NOTE TO CONTRACTOR WIDTH @DISCHARGE: 6 6'' 40 o zo 40 so Iso PROJECT NUMBER d5o: 6 dMAX: 9" AS-BUILTS MUST BE APPROVED BEFORE ISSUANCE OF FINAL PLAT 21 .27.008 THICKNESS: 14" SCALE: 1" = 40' AND/OR CERTIFICATE OF OCCUPANCY (C.O.). (IN FEET) AS-BUILT SAND FILTERS PRIOR TO MEDIA BEING PLACED OVER C419 I inch= 40 ft. UNDERDRAINS. WET POND OPERATION AND \ /' MAINTENANCE PROVISIONS _� =_=--� 40 o zo 40 so Ibo EMBANKMENT REQUIREMENTS 0 o Z NOTES: THE FOLLOWING EMBANKMENT SPECIFICATIONS APPLY TO ALL BMPS WITH EMBANKMENTS THAT ARE _ PotentialSCM element: problems: How to, _` \\ ;�\ \\� 37� DESIGNED TO HOLD WATER,EVEN IF THE EMBANKMENT IS DESIGNED TO HOLD WATER ONLY DURING \ - ** A STORM EVENT. MDC - THE VEGETATED SHELF SHALL HAVE A MAX. SLOPE OF 6:1 AND Z W The entire SCM Trash/debris is present. Remove the trash/debris. \\\ \\ \ \\ IN FEET) EMBANKMENT FILL MATERIALS Regrade the soil if necessary to \ \\ \\ \ BE VEGETATION AT A MINIMUM DENSITY TY OF 50 PLANTSPER 200 SQ. THE FOLLOWING PARAMETERS APPLY TO MATERIALS USED TO CONSTRUCT EMBANKMENTS: - \ \ \� � �O�— I inch 40ft. remove the gully,plant ground \� �� '' FEET OF SHELF AREA. Areas of bare soil and/or \ \ � t The perimeter of the wet pond cover and water until it is _ \ \ • BORROW MATERIAL SHALL BE CLASSIFIED AS MIL,MH,SC,SM,CL OR CH SOILS ACCORDING TO THE J erosive gullies have formed. \\ established. Provide lime and \ \\\\ \\ cjJ� UNIFIED SOIL CLASSIFICATION SYSTEM(ASTM D2487)OR ANY MIXTURE OF THESE SOILS. 0- Ld a one-time fertilizer application. ` \ \ \ * • BORROW MATERIALS SHALL HAVE A LIQUID LIMIT(ILL)BETWEEN 40 AND 60 AND A PLASTICITY INDEX `rid \\\\ �\ FRONT AND REAR EMBANKMENT (SIDE SLOPES), AS WELL AS THE TOP (PI)BETWEEN 15 AND 30(ASTM D4318). Unclog the pipe. Dispose of \ $$� • MATERIALS SHALL BE FREE OF TOPSOIL,ORGANIC MATERIAL,ROOTS,STUMPS,BRUSH,ROCKS The inlet pipe is clogged(if the sediment in a location \\\\\\ •� �J� —A- U� OF DAM, SHALL BE PLANTED WITH NON-CLUMPING PERENNIAL TURF LARGER THAN 3 INCHES,SUBSOIL,DEBRIS,VEGETATION,AND OTHER FOREIGN MATTER. applicable). where it will not cause impacts \ \SS X k • ALL MATERIAL CLODS WILL BE BROKEN DOWN WITH TILLERS AND/OR DISCS TO PROVIDE A to streams or the SCM. \\\\\�` \k 555 SCALE: 1" = 40' GRASSES, SUCH AS HYBRID BERMUDA OR CENTIPEDE. HOMOGENEOUS SOIL THAT IS FREE OF CLAY CLODS GREATER THAN 3 INCHES IN DIAMETER. The inlet pipe is cracked or \\ \\\\\\\\ k\k r* EMBANKMENT CONSTRUCTION The inlet device otherwise damaged(if Repair or replace the pipe. �\ \ \ �� ^5g0 CONTRACTOR MAY AMEND LAYOUT AND SUBSTITUTE PLANTING applicable). \\\\ \ - r ' "" ""` �",r THE FOLLOWING STEPS APPLY TO CONSTRUCTION OF AN EMBANKMENT: _ �k MATERIALS AS LONG AS MDC STATED PREVIOUSLY IS FOLLWED Regrade the swale if necessary \\\ ` " •" 98 ;`�^'• \ \ a \ k STEP 1:SUBGRADE PREPARATION: and provide erosion control \ $$ 704 439-6521 Erosion is occurring in the \ \ � � 7 X ;'- ( ) devices such as reinforced turf \ Swale(if applicable). \ \ matting or riprap to avoid future \ x ��^��,,,;;• COMPACT SUBGRADE TO DENSITY REQUIREMENTS FOR SUBSEQUENT FILL MATERIALS. FIRM #P-1$$4 erosion problems. WATER QUALITY POND NOTES CUT OUT SOFT AREAS OF SUBGRADE NOT CAPABLE OF COMPACTION IN PLACE. WWW.PLOTTHOUNDENGINEERING.COM SCARIFY SUBGRADE SURFACE TO DEPTH OF 6 INCHES. `S.3 �•� '� k PROOF ROLL SUBGRADE TO IDENTIFY SOFT SPOTS;FILL AND COMPACT Search for the source of the � \ \ $$� ^-� � S$g ALL AREAS ABOVE THE PERMANENT POOL SHALL BE PREPARED&SEEDED TO PERMANENT sediment and remedy the ��\ — k \ Sediment has accumulated to a � � GROUND COVER SPECFICATIONS. depth greater than the original problem if possible. Remove \\ \ k ` STEP 2:SEEPAGE KEY PLACEMENT the sediment and dispose of it design depth for sediment \ ` THE PERMANENT WET DETENTION BASIN SHALL NOT BE CONSTRUCTED UNTIL THE CONTRIBUTING U A 0 n a location where it will not SS , \ C� R storage. cause impacts to streams or \ 0� Jr k �r DRAINAGE IS STABILIZED.ANY SEDIMENT THAT ACCUMULATES WITHIN THE POND SHALL BE SEEPAGE KEY TRENCH WILL BE LOCATED BETWEEN EMBANKMENT ABUTMENTS. \\\ •'' the SCM. \ \ 55 PERMANENT POOL " " Sg \ \ SEEPAGE KEY SHALL EXTEND TO MINIMUM DEPTH OF 4 FEET OR AS REQUIRED THROUGH OF The forebay 0 �� REMOVED AND THE FINAL GRADE RE-ESTABLISHED TO THE PROPOSED CONTOURS SHOWN. GEOTECHNICAL SEEPAGE ANALYSIS.A MINIMUM BOTTOM TRENCH WIDTH SHALL BE 10 FEET AND THE Q Provide additional erosion \�\ \ �' ELEV. 555.50' \ r TRENCH SIDEWALLS SHALL BE SLOPED OR BENCHED TO PROMOTE STABILITY AND BONDING �\ THE PROPOSED STORMWATER MANAGEMENT PONDS ARE TO BE CONVERTED FROM SEDIMENT BETWEEN THE SIDEWALL SOILS AND SEEPAGE KEY FILL. protection such as reinforced `� $$5 r T AND EROSION CONTROL BASINS. THIS CONVERSION SHOULD BE COMPLETED AFTER THE ENTIRE _ Erosion has occurred. turf matting or riprap if needed \ - J�s� �S = 042077 = to prevent future erosion DRAIN AREA IS STABILIZED AND APPROVAL GIVEN FROM THE LOCAL&STATE AUTHORITY. �v115/23 p \ k STEP 3: EMBANKMENT FILL PLACEMENT problems. ♦ z7 i� k` i \�_1� 550` k` x THE CONVERSION TO A PERMANENT STORM WATER BMP SHALL BE ACCOMPLISHED BY INSTALLING . EMBANKMENT FILL SHALL BE CONSTRUCTED AT 3(HORIZONTAL):l(VERTICAL)OR AS SHOWN ON THE '` Remove the weeds,preferably / \ �� THE PERMANENT OUTLET STRUCTURE AND RE-GRADING THE BASIN CONTOURS TO THOSE SHOWN DRAWINGS.DEMONSTRATION OF APPROPRIATE SAFETY FACTORS AGAINST FAILURE THROUGH ////�iQ G I N�' Q\\\\\ by hand. If pesticide is used, \ / 5 FOREBAY \ I ON THE PLAN. /// yA \\ Weeds are present. wipe it on the plants rather than 50\ w GEOTECHNICAL ANALYSIS SHALL BE REQUIRED FOR SLOPES STEEPER THAN //, NI ILIN\\\\\\ 0 3(HORIZONTAL)A(VERTICAL). spraying. � / / —$$4 N ANY SEDIMENT LADEN WATER WITHIN THE SEDIMENT BASIN SHALL BE DRAWN DOWN BY USE OF • FILL SOILS SHALL BE PLACED IN LOOSE LIFTS NOT TO EXCEED 8 INCHES IN THICKNESS AND BE \ 551 555 o5a \ PUMPS AND DISCHARGES THROUGH A'BLADDER'TYPE SYSTEM OR DISPOSED OF OFFSITE IN AN COMPACTED TO A MINIMUM OF 95 PERCENT OF THE SOILS STANDARD PROCTOR(ASTM D698) Best professional practices \ APPROVED SYSTEM. MAXIMUM DRY DENSITY,OR AS SPECIFIED ON THE DRAWINGS. show that pruning is needed to Prune according to best professional practices. �\ � iP _ COMPACTED MOISTURE CONTENT SHALL BE BETWEEN 3 PERCENT BELOW AND 3 PERCENT ABOVE maintain optimal plant health. \ \ Jc ALL SEDIMENT REMOVED SHALL BE PLACED IN A DESIGNATED SPOIL PILE AND ADEQUATELY �•'°" �\ � THE OPTIMUM MOISTURE CONTENT FOR ALL FILL PLACED,OR AS OTHERWISE APPROVED BY 60' kA t f ! PROTECTED WITH EROSION CONTROL MEASURES AND PERMANENTLY STABILIZED WITH ENGINEER. Determine the source of the ` \ \ �' \ ,yam,. \ PERMANENT SEEDING. FILL SOILS SHOULD BE PLACED IN CONTINUOUS,HORIZONTAL LAYERS FROM ABUTMENT TO problem: soils,hydrology, yy► \ ABUTMENT.EXISTING SLOPES GREATER THAN 4 HORIZONTAL 1 VERTICAL SHALL BE BENCHED TO \ / \ ( ): (VERTICAL) disease,etc. Remedy the , \ �� Sg Plants are dead,diseased or problem and replace plants. ` \ �� PROMOTE BONDING OF NEWLY PLACED FILL WITH EXISTING SOILS.BENCHING SHALL BE PERFORMED The vegetated shelf dying. Provide aone-time fertilizer \ \ j — — — — _ _ \ \ c AT MAXIMUM OF 2 FEET VERTICAL INTERVALS AND SHALL EXTEND A MINIMUM OF 4 FEET \ I\ iP application to establish the \ 1 3 0 X HORIZONTALLY OR AS SPECIFIED ON DRAWINGS. ground cover if a soil test \y \\ WITHIN THE UPPER 12 INCHES OF EMBANKMENT,FILL SOILS SHOULD BE COMPACTED TO 100%OF ITS indicates it is necessary. \ \ STANDARD PROCTOR(ASTM D698)MAXIMUM DRY DENSITY. E FILL AGAINST SUPPORTED STRUCTURES.DO NOT FILL AGAINST UNSUPPORTED STRUCTURES. Remove the weeds,preferably \ / -- 1 I �� ' �� \ o X PLACE FILL SIMULTANEOUSLY ON EACH SIDE OF UNSUPPORTED STRUCTURES UNTIL SUPPORTS ARE by hand. If pesticide is used, / �\ I IN PLACE. Weeds are present. wipe it on the plants rather than / \ _X / -----_ ' ��\ I J \ S > I PLACE A MINIMUM OF SIX INCHES OF TOPSOIL ACROSS DAM EMBANKMENT TO PROMOTE VEGETATIVE spraying. \\ \ /. \ 6j GROWTH. Search for the source of the \ , /\ I I \ STEP 4:OUTLET PIPE FILL PLACEMENT sediment and remedy the \ --_ \4\ I \ is �O� Sediment has accumulated to a problem if possible. Remove \ / f0 -_-- I I \ \ \ �s� FILL OF THE CULVERTS SHALL BE PLACED AND COMPACTED IN 6-INCH THICK LOOSE LIFTS AROUND depth greater than the original the sediment and dispose of it \\ \ 0 /^ i' y \ 3 \� \ 5 \ 5 - THE DROP INLETS AND UP TO 2 FEET ABOVE THE CULVERTS. design sediment storage depth. in a location where it will not / cause impacts to streams or 60� COMPACTION SHALL BE PERFORMED BY HAND TAMPERS OR SMALL HAND OPERATED COMPACTORS. the SCM. I \\ \ \ // ,/ _ I ' �\ I \\ — — _� _ COMPACTION SHALL BE AT A MINIMUM 95 PERCENT OF THE STANDARD PROCTOR(ASTM D698) The main treatment area I \\ \ z - / // - I \\ I MAXIMUM DRY DENSITY.COMPACTED MOISTURE CONTENT SHALL BE BETWEEN 3 PERCENT BELOW Consult a professional to I \ \ \ �- / / \ \ \ ��\ / 6 S� AND 3 PERCENT ABOVE THE OPTIMUM MOISTURE CONTENT FOR ALL FILL PLACED,OR AS OTHERWISE Algal growth covers over 50% \ \ I / rp remove and control the algal \ \ / 4) ` ,-•-•'- - —� J \ � � i _--.• � � APPROVED BY ENGINEER. of the area. \ I / / \ :.: \ growth. \.•a � '.• -.:•- . \ •. �,, � --. ADDITIONAL COMPACTION OF LIFTS 2 FEET OR GREATER ABOVE CULVERTS SHALL CONFORM TO THE ' EMBANKMENT FILL PLACEMENT SECTION OF THIS SPECIFICATION. Cattails,phragmites or other Remove the plants by wiping �� \ -- invasive plants cover 50%of them with pesticide(do not \ \ \\ \ / / ,' �S(� :�::y' �� i' _ STEP 5: FIELD QUALITY CONTROL the basin surface. spray). \� ` \ \\ \ / \ 1\ / +'=�', " \• _ s �- �• LABORATORY TESTING Shrubs have started to grow on \\\\ \\ \\\ � / / \ ` t •.~' •' / _ _ -_ -.-•'� ':',+• \%�� _ Remove shrubs immediately. \ \ \ \ / / '' _ --564 ' •` • PERFORM LABORATORY MATERIAL TESTS IN ACCORDANCE WITH ASTM D422,ASTM D698,ASTM D2216, z the embankment. \ \ \ \ / ;•r _' AND ASTM D4318. Evidence of muskrat or beaver Consult a professional to • TEST AT A FREQUENCY OF EVERY 500 CUBIC YARDS OF EMBANKMENT FILL MATERIAL PLACED,WHEN Q The embankment activity is present. remove muskrats or beavers MATERIALS USING FOR EMBANKMENT FILL CHANGE,AND/OR AS DIRECTED BY THE ENGINEER. and repair any holes or erosion. • SAMPLE SIZE SHALL BE 50-LB. A tree has started to grow on Consult a dam safety specialist IN PLACE COMPACTION AND NATURAL MOISTURE CONTENT TESTS I I I 0— j the embankment. to remove the tree. 1.. PERFORM IN PLACE COMPACTION TESTS IN ACCORDANCE WITH ASTM D1556,ASTM D2922,OR ASTM n U Uj An annual inspection by an D2937 AND NATURAL MOISTURE CONTENT TEST IN ACCORDANCE WITH ASTM D2216. V 7 appropriate professional shows Make all needed repairs FREQUENCY OF COMPACTION/NATURAL MOISTURE CONTENT TESTS: L n that the embankment needs immediately. EMBANKMENT FILL:EACH LIFT AT A MINIMUM FREQUENCY OF 1 PER 2,500 SQ.FT. li repair. VEGETATED SHELF PLANTING LAYOUT o w Q PIPE INSTALLATION:EACH LIFT AT A MINIMUM FREQUENCY OF 1 PER 30 LF OF PIPE. WHEN TESTS INDICATE WORK DOES NOT MEET SPECIFIED REQUIREMENTS,REMOVE WORK,REPLACE � � ` Clean out the outlet device and 6'X34' - 204 SQFT O Q C ) Clogging has occurred. dispose of any sediment in a AND RETEST. ��rt�� V 99 9 location where it will not cause V The outlet device impacts to streams or the SCM 4.0.6.3 ALLOWABLE VARIANCES 1/ z r n t\ EMBANKMENT SPECIFICATIONS MAY BE MODIFIED BASED ON SITE-SPECIFIC GEOTECHNICAL Ld_ > C) The outlet device is damaged Repair or replace the outlet \ 9 INVESTIGATION AND ENGINEERING DESIGN. Uj device. \ ` WATER QUALITY POND PLANTING NOTES LL LL z Weeds or volunteer trees are Remove the weeds or trees. 1. THE LITTORAL ZONE&PROP.WETLANDS SHALL BE FINE GRADED&TOPSOIL APPLIED Floating wetland island(if growing on the mat. &FINE GRADED BY THE LANDSCAPE CONTRACTOR. (OVERALL GRADING BY THE SITE z applicable) The anchor cable is damaged, Restore the anchor cable to its 6' WORK CONTRACTOR). \ > J disconnected or missing. design state. / 2. TOPSOIL SHALL BE NATIVE ON-SITE TOPSOIL REMOVED FROM THE WATER QUALITY < Q 1 Erosion or other signs of Repair the damage and Q POND AREA. LANDSCAPE CONTRACTOR SHALL COORDINATE WITH THE G.C.TO damage have occurred at the improve the flow dissipation i 6� i 6� s i i INSURE THAT EXISTING TOPSOIL IS CAREFULLY REMOVED WITHOUT INTERMIXING Q Q outlet. structure WITH CLAY SUBSOIL&PROPERLY STOCKPILED FOR RE-USE. The receiving water (� (� Discharges from the wet pond II �.l!_� �� 3. IT IS IMPORTANT THAT THE TOPSOIL BE RE-USED DUE TO THE EXISTING NATIVE \ly are causing erosion or Contact the local NCDEQ GeG _ G� G� G� G� G� G - G� V "SEED BANK". PLACED TOPSOIL SHALL BE 9"TO 12"DEEP OVER ENTIRE POND. POND PLANTING LIST FOR VEGETATED SHELVES sedimentation in the receiving Regional Office. 5 water. GG 4. TOPSOIL SHALL BE PLACED TO COVER EXISTING CLAY SUBSOIL IMMEDIATELY UPON COMPLETION OF GRADING TO PREVENT SILTATION OF POND WATER. 34' Plants for Submerged and Partially Submerged Vegetated Sftelves 5. WHERE NECESSARY, PIN PLANTS DOWN UTILIZING 12"BENT WIRE PINS.(SMITH& RICHARDSON Co., 1-800-426-0876)TO PREVENT FLOATING&AID IN ROOTING. PLANT SPECIES COMMON NAME PER 200 SQFT TOTAL FOR BMP #6 6. ALL PLANTED AREAS SHALL BE KEPT MOIST&NOT ALLOWED TO DRY OUT.THIS Botanical Name Common Name MAINTENANCE SHALL BE CONTINUOUS UNTIL POND HAS FILLED TO PERMANENT WATER LEVEL, POND"SYSTEM"HAS STABILIZED&PLANTS ESTABLISHED(ROOTED). Asclepias inoarnata Swamp Milkweed CARER TENERA QUILL SEDGE 34 656 7. LANDSCAPE CONTRACTOR SHALL PROVIDE CONTINUOUS MAINTENANCE OF ALL WETLAND PLANTINGS UNTIL ESTABLISHED(ROOTED),&SHALL REPLACE DEAD OR DYING PLANTS AS NECESSARY DURING THE ONE YEAR WARRANTY PERIOD. Carex tenera quill sedge Cilelone glabra White Turtlehead EUPATORIADELPHUS DUBLUS DWARF JOE PYE WEED 11 221 P PLANTING INSTRUCTIONS Eupatariadelphusdubius Dwarf Joe PyeWeed } N PLANTING TECHNIQUES E u pato riad elp h us fistulosus Joe Pye Weed m N A. INSURE THAT ROOTS, ONCE REMOVED FROM POT, ARE STRAIGHTENED AND FACE _J J Z O j DOWNWARD. 3: N� uJ I B. CREATE PLANTING AREA FOR EACH PLANT AND EXCAVATE PIT. Eupatoriadelphus maculatus Spotted trumpetweed COm Q O C. PLACE PLANTS IN PIT INSURING ROOTS ARE FACING COMPLETELY DOWNWARD. Z Q D. HEEL ITO NEXT PLANTING SACCHARUM BALDWINII NARROW PLUMEGRASS 11 222 E. NEWLYNPLAONTED IL PLAANTTSAROLIONDPLANT NEED TO BEFAND POASTENED TO THE SUBSTRATEECFOR THE Lu ESTABLISHMENT OF NEW ROOTS. Hibiscus coccineus Scarlet rose mallow F. ROOTS SHALL BE SPREAD IN THEIR NORMAL POSITION. ALL BROKEN OR FRAYED ROOTS HALL BE CUT OFF CLEANLY. G. THE DIAMETER OF THE PITS FOR ALL VEGETATIVE STOCK SHALL BE AT LEAST Hibiscus laevis Ha The rdleaf rosemallow TOTAL 56 990 THREE TIMES THE DIAMETER OF THE ROOT MASS. PLANT PIT WALL SHALL BE SCARIFIED PRIOR TO PLANT INSTALLATION. H. SET THE PLANTS UPRIGHT, IN THE CENTER OF THE PIT. THE BOTTOM OF THE ROOT Kosteletzkya virgrnica Seashore Mallow MASS SHOULD BE RESTING ON UNDISTURBED SOIL. I. PLACE THE BACKFILL AROUND THE BASE AND SIDES OF THE ROOT MASS, AND WORK EACH LAYER TO SETTLE BACKFILL AND TO ELIMINATE VOIDS AND AIR POCKETS. WHEN PIT IS APPROXIMATELY 2/3 FULL, WATER THOROUGHLY BEFORE Lobelia cardinalis Cardinal flcwef PLACING REMAINDER OF THE BACKFILL. WATER AGAIN AFTER PLACING FINAL LAYER OF SEEDBED PREPARATION TEMPORARY SEEDING SCHEDULE PERMANENT SEEDING SCHEDULE (DAM EMBANKMENTS) J. BROKENKORLDAMAGED PARTS WILL BE CUT BACK TO UNDAMAGED TISSUE, LEAVING AS MUCH GREEN BASAL TISSUE AS POSSIBLE ABOVE THE ROOTS. IF MORE THAN Lobelia elongata Longleaf lobelia SEEDING DATE SEEDING MIXTURE APPLICATION RATE SEEDING DATE SEEDING MIXTURE APPLICATION RATE FIFTY PERCENT (50%) OF THE PLANT IS DAMAGED THEN CONTRACTOR SHALL 1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER ADVERSE SOIL REPLACE THE PLANT. CONDITIONS, IF AVAILABLE. JAN 1 MAY 1 RYE (GRAIN) 120 LBS/AC AUG 25 - OCT (BEST) TALL FESCUE 200 LBS/AC Lobelia siphilitica Great blue Lobelia KOBE LESPEDEZA 50 LBS/AC FEB - APR 15 (POSSIBLE) CONTAINER STOCK / BARE ROOT 2. RIP THE ENTIRE AREA TO 6 INCHES DEPTH. MAY 1 - AUG 15 GERMAN MILLET 40 LBS/AC A. STOCK SHALL HAVE BEEN GROWN IN A CONTAINER LONG ENOUGH FOR THE ROOT AUG 15 - DEC 30 RYE (GRAIN) 120 LBS/AC SOIL AMENDMENTS SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL TOGETHER ONCE Rhynchospora colorata Starrush whitetop 3. REMOVE ALL LOSE ROCK, ROOTS, AND OTHER OBSTRUCTIONS LEAVING SURFACE FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 4,000 LB/AC GROUND AGRICULTURE LIMESTONE AND REMOVED FROM THE CONTAINER. coREASONABLY SMOOTH AND UNIFORM. SOIL AMENDMENTS 1000 LB/AC 10-10-10 FERTILIZER. B. CONTAINER PLANTS WILL NEED TO BE WATERED REGULARLY AND PLACED IN SHADY Z CONDITIONS UNTIL PLANTING OCCURS. 0 4. PER ONE TIME ONLY, APPLY AGRICULTURAL LIME, FERTILIZER, AND SUPERPHOSPHATE FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 LB/AC GROUND AGRICULTURE LIMESTONE AND C. BARE ROOT PLANTS ARE FOR IMMEDIATE PLANTING, OTHERWISE SEE D) BELOW. Saccharum baldwinii Narrow plumegrassEO UNIFORMLY AND MIX WITH SOIL. 750 LB/AC 10-10-10 FERTILIZER (FROM AUG 15 - DEC 30, INCREASE 10-10-10 FERTILIZER TO 1000 LB/AC). MULCH D. IF BARE ROOTS SPECIMENS ARE NOT TO BE PLANTED WITHIN FOUR (4) DAYS, j 5. CONTINUE TILLAGE UNTIL A WELL-PULVERIZED, FIRM REASONABLY UNIFORM SEEDBED IS APPLY 4000 LB/AC STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, OR A MULCH ANCHORING TEMPORARY HOLDING OF BARE ROOT SPECIMENS ARE TO BE COVERED ENTIRELY BY LU PREPARED 4 TO 6 INCHES DEEP. MULCH TOOL. A DISK WITH BLADES SET NEARLY STRAIGHT CAN BE USED AS A MULCH ANCHORING TOOL. A SUITABLE MEDIUM (ETC. SOIL, SAWDUST, MULCH OR THE LIKE) AND WATERED q APPLY 4000 LB/AC STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, OR A MULCH ANCHORING REGULARLY SO AS TO NOT DRY OUT. 6. SEED ON A FRESHLY PREPARED SEEDBED AND COVER. TOOL. A DISK WITH BLADES SET NEARLY STRAIGHT CAN BE USED AS A MULCH ANCHORING TOOL. MAINTENANCE INSPECT AND REPAIR MULCH FREQUENTLY. REFERTILIZE IN LATE WINTER OF THE FOLLOWING YEAR; USE SOIL PLANT LOCATIONS THIS DRAWING IS THE PROPERTY OF PLOTT A. NEW PLANTINGS SHALL BE LOCATED WHERE SHOWN ON PLAN EXCEPT WHERE HOUND ENGINEERING AND IS NOT TO BE 7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. MAINTENANCE TESTS OR APPLY 150 LB/AC 10-10-10 FERTILIZER. MOW REGULARLY TO A HEIGHT OF 2-4 INCHES. CHANGES HAVE BEEN MADE IN PROPOSED CONSTRUCTION. REPRODUCED OR COPIED IN WHOLE OR IN JAN 1 - AUG 15:REFERTILIZE IF GROWTH IS NOT FULLY ADEQUATE. RESEED, REFERTILIZE, AND MULCH B. NECESSARY ADJUSTMENTS SHALL BE MADE ONLY AFTER APPROVAL BY THE OWNER 8. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEEDINGS WITHIN IMMEDIATELY FOLLOWING EROSION OR OTHER DAMAGE. NOTE: PERMANENT SEEDING SCHEDULE IS FOR SLOPES OF THE BASIN, TOP OF BERM, AND BASIN FLOOR. OR THE OWNER'S REPRESENTATIVE. PART.IT IS NOT TO USED ANY IS THE PLANTING SEASON, IF POSSIBLE. AFTER PERMANENT COVER IS ESTABLISHED. OTHER PROJECT AND S TO BE RETURNED C. ZONES 4-6 SHOULD EMPLOY "RANDOM SPACING" OF THE LISTED PLANT QUANTITY. UPON REQUEST. 9. CONSULT CONSERVATION INSPECTOR ON MAINTENANCE TREATMENT AUG 15 - DEC 30: REPAIR AND REFERTILIZE DAMAGED AREAS IMMEDIATELY. TOP DRESS WITH 50 LB/AC D. THAT PART OF ZONES 4-6 THAT ARE LOCATED ON THE DAM EMBANKMENT SHALL OF NITROGEN IN MARCH. IF IT IS NECESSARY TO EXTEND TEMPORARY COVER BE PLANTED WITH SEED MIXES ONLY. TREES AND SHRUBS SHOULD BE PLANTED AT LEAST 15' AWAY FROM THE TOE OF E. BEYOND JUNE 15, OVERSEED WITH 50 LB/AC KOBE LESPEDEZA IN LATE FEBRUARY SLOPE OF THE DAM AND AT LEAST 25' AWAY FROM PRINCIPAL SPILLWAY PROJECT NUMBER OR EARLY MARCH. STRUCTURES.F. ADDITIONAL INFORMATION IF NEEDED CAN BE FOUND IN THE 21 •27.008 NOTE: USE THE TEMPORARY SEEDING SCHEDULE ONLY WHEN DATE IS NOT CORRECT TO USE THE PERMANENT CHARLOTTE-MECKLENBURG BMP DESIGN MANUAL. SEEDING SCHEDULE. WATER C420 WATER SHALL BE POTABLE AND SHALL NOT CONTAIN ELEMENTS TOXIC TO PLANT LIFE.