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HomeMy WebLinkAboutSW7110304_HISTORICAL FILE_20110502STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW_Il/ e:54 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE`J11�j YYYYMMDD d 0 LEGEND N/F WEYERHAEUSER COMPANY DB. 358 PG. 457 - TRACT TWO FORMERLY NORTH CAROLINA PULP COMPANY (J.V BLADES TRACT) MB. 1 PG. 193 ISA 0 VERNe DO�CCEC 72 4� E�ECrRI �E �Qs� o�SrR��cuT fSPA 0 /,:::R ET-CRA EN EMC B. 2749 P 724 — 05, H SL. 25-G 1:7545+/ AC . S ._240 (DA-2) L86.46' ' /J )v/ d o Y 0 'k- (DA-1) N/F W(::: 7 EYERHAEUSER COMPANY DB. 358 PG. 457 - TRACT TWO FORMERLY NORTH CAROLINA PULP COMPANY (J.V BLADES TRACT) MB. 1 PG. 193 cwPA4[y� _ CORM v h S -41 4yll Cq �`� No l I TIME OF CONCENTRATION LINE ,. (D A 1.\.. DRAINAGE AREA 1 (DA-1) �-- PROPERTY.LINE I \ A ) 1.14 ACRES I , @o PROPERTY CORNER R/W DITCH CENTERLINE ROAD CENTERLINE PROPOSED SUBSTATION FENCE CONSTRUCTION LIMIT EXISTING CONTOURS PROPOSED CONTOURS EXISTING OVERHEAD POWER LINES RIGHT-OF-WAY DRAINAGE AREA 2 (DA-2) 0.47 ACRES 5 01_, 1 p0 POBC/\CLASS,s V 2 C R/W RCP J\ rl \.. 22 5 23 �a N/F AARON GOODING DB. 592 PG. 503 > R/ N�.bO �.W ,Sg23p. n f UNf N/F US FORESTRY SERVICE � TRACT 9 s � Ncs3 6 OR2 n N >3?> 4CWU 9 5 \ /V cos " H� 'CHURCH' of uNf � DRAINAGE AREA MAP POST —DEVELOPED SCALE: 1 "=30'-O" PROPERTY AREA = 1.75 ACRES IMPERVIOUS AREA = 0.81 ACRES 30 0 30 60 90 GRAPHIC SCALE - FEET VICINITY MAP NTS DRAINAGE AREA 1 (DA-1) DRAINAGE AREA = 1.28 ACRES TIME OF CONCENTRATION (Tc) = 2.4 MINUTES LENGTH = 205' AVERAGE SLOPE = 0.0100 (ft/ft) DRAINAGE AREA 2 (DA-2; DRAINAGE AREA = 0.47 ACRES NOTES: 1. THIS PROPERTY IS SUBJECT TO ANY AND ALL EASEMENTS, COVENANTS, RESTRICTIONS, RIGHT-OF-WAYS OF RECORD, GOVERNMENTAL ORDINANCES AND/OR REQUIREMENTS WHICH MAY EXIST AND LIMIT THE USE OF THIS PROPERTY. 2. THIS PARCEL IS NOT LOCATED WITHIN A FLOOD HAZARD AREA ACCORDING TO FEMA FLOOD INSURANCE RATE MAP (3720646000K PANEL 6460) BOUNDARY AND TOPOGRAPHIC SURVEY PERFORMED BY: JAMES C. SIMMONS, JR. - PLS # 3992 JAMES C. SIMMONS AND ASSOCIATES PROFESSIONAL LAND SURVEYORS 603 WEBB BOULEVARD HAVELOCK, NC 28532 (252) 447-1509 SEASONAL HIGH WATER TABLE 1. S.H.W.T ELEVATION = 6" (INFORMATION BASED ON SOIL BORINGS PERFORMED BY GEOTECHNOLOGIES, INC. AND FIELD OBSERVATIONS BY BOOTH & ASSOCIATES, INC.) REFERENCES GRADING & EROSION CONTROL PLAN/DETAILS STORMWATER MANAGEMENT PLAN DRAINAGE AREA MAP - PRE -DEVELOPED APPROVED NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION DIVISION OF WATER QUALITY 202 3086836GR1 (GR1 OF 2 / GR2 OF 2) Sto mv:a!er PrrmR Nab=�� I I J" `1 3086836SM1 (SM1 OF 2 / SM2 OF 2) 3086836DAl (DA1 OF 2) MAI? U 3 "ill l l 30R68._iRDA1 LEGEND N N/F WEYERHAEUSER COMPANY DB. 358 PG. 457 — TRACT TWO FORMERLY NORTH CAROLINA PULP COMPANY (J.V BLADES TRACT) MB. 1 PG. 193 TZ_�J M :CARTERET—CRAVEN EMC DB. 2749 PG. 724 PC: H SL.- 12b—G 1.7545+/-AC_ 25.5 24,Q N/F WEYERHAEUSER COMPANY DB. 358 PG. 457 — TRACT TWO FORMERLY NORTH CAROLINA PULP COMPANY (J.V BLADES TRACT) MB. 1 PG. 193 23 5 . . 23.0 N (DA-1) . L2. e o. c�2 s ' LOW, WET AR 5� . . . . N/F AARON GOODING co CIV .,._ 3 DB. 592 PG, 503 OV eRNf o �Q��FCTR/CLOW, ,WET ARE�i . . . . . . CU/T ti4C Q�STRIBUTeS . . . . . . . \IERo CIT S Fj TQ QN u .t roa,PN \� As\ w J \ , OF g Sf T a T TNfla fARK 2qp• I LOW. WET tH � \ 7 u a EDGE GF 2,15 ie Pal \.>. . . . . . . . � v 23.0 TIME OF CONCENTRATION LINE PROPERTY LINE PROPERTY CORNER DITCH CENTERLINE ROAD CENTERLINE EXISTING CONTOURS PROPOSED CONTOURS EXISTING OVERHEAD POWER LINES RIGHT—OF—WAY DRAINAGE AREA 1 (DA-1) \35 ?D. R�� r \.2S 10 3 �a 5 lool U8C1 R/W 2 o 220 2.g 23 SPA 'M \ 7 /b0 00.W �2'30' Af UNf / N/F US FORESTRY SERVICE TRACT 9 5 IV 740, w,a 3 W � \cs3 B OR2 n \ N¢C7-0 lvc W\3 S.0\HO \ f� NCGS CHURCH' R2 DRAINAGE AREA MAP PRE —DEVELOPED SCALE: 1 "=30'-0" PROPERTY AREA = 1.75 ACRES IMPERVIOUS AREA = 0.00 ACRES 30 0 30 60 90 GRAPHIC SCALE - FEET VICINITY MAP NTS DRAINAGE AREA 1 (DA-1) DRAINAGE AREA = 1.75 ACRES TIME OF CONCENTRATION (Tc) = 49.8 MINUTES LENGTH = 330' AVERAGE SLOPE = 0.0074 (ft/ft) NOTES: 1. THIS PROPERTY IS SUBJECT TO ANY AND ALL EASEMENTS, COVENANTS, RESTRICTIONS, RIGHT—OF—WAYS OF RECORD, GOVERNMENTAL ORDINANCES AND/OR REQUIREMENTS WHICH MAY EXIST AND LIMIT THE USE OF THIS PROPERTY. 2. THIS PARCEL IS NOT LOCATED WITHIN A FLOOD HAZARD AREA ACCORDING TO FEMA FLOOD INSURANCE RATE MAP (3720646000K PANEL 6460) BOUNDARY AND TOPOGRAPHIC SURVEY PERFORMED BY: JAMES C. SIMMONS, JR. — PLS # 3992 JAMES C. SIMMONS AND ASSOCIATES PROFESSIONAL LAND SURVEYORS 603 WEBB BOULEVARD HAVELOCK, NC 28532 (252) 447-1509 SEASONAL HIGH WATER TABLE 1. S.H.W.T ELEVATION = 6" (INFORMATION BASED ON SOIL BORINGS PERFORMED BY GEOTECHNOLOGIES, INC. AND FIELD OBSERVATIONS BY BOOTH & ASSOCIATES, INC.) REFERENCES GRADING & EROSION CONTROL PLAN/DETAILS STORMWATER MANAGEMENT PLAN DRAINAGE AREA MAP — POST —DEVELOPED 3086836GR1 (GR1 OF 2 / GR2 OF 2) 3086836SM1 (SM1 OF 2 / SM2 OF 2) 3086836DAl (DA2 OF 2) APPROVEDS 1> NORTH CAROLINA ENVIRONMENTAL. MANAGEMENT COMMISSION DIVISION OF WATER QUALITY Data — 20_� i `,it G '? 2011 N 3nR6R.3RDA1' N 0 co 7- 0 U 2 a o 0 ""•� CARTERE -CRAVEN EMC t. GRASS -LINED CHANNEL 1 v m DB. 49 PG. 724 •g, PC. SL. 125-G Lo 231.7 45+/-AC t S 7Z5637-f N/F WEYERHAEUSER COMPANY DB. 358 PG. 457 - TRACT TWO FORMERLY NORTH CAROLINA PULP COMPANY (J.V BLADES TRACT) MB. 1 PG. 193 CAUTION - ENERGIZED OVERHEAD ELECTRIC LINES CCEC 12.47kV DISTRIBUTION 24, 0 N/F WEYERHAEUSER COMPANY DB. 358 PG. 457 - TRACT TWO FORMERLY NORTH CAROLINA PULP COMPANY (J.V BLADES TRACT) MB. 1 PG. 193 3� a. ' • • •2 a . `�„yr�usz.. K K p.. ♦ • • .: .y . . K K K A ^ a :a • . ' : •..y .. '� 'a' • • a ... K A '1AA • V. a ' aP. tl • y`.a' f : : '. a" :'.a^� ;.y�+<%i ya=''..y+'r a u: :. .' ° kk • • .., , d .. r, d'a N Ak ��.. ', N } ® �,. + .•. a ,P .. (V A i1 w A ,� Q •'.0 ° $ I a s ® <' TEE {PHASE Q Et -GR2FOR INVER tl �N N-,p aka •.� : + ..:q .. �r:tq..Pq -;,.> ��=.._.� ,4\'`Fyn ,' ANZOCR7C f'1 "Ear 2� `G '•., ,, , x - � y 'ram � '2�1.. ''a. �'a.. y. s.ryp "�'-+, 'vY "mr` _� »" d .iA 5 r ° v Y , • O ' •' ki' a �r I tub, - at Q19 INST 18.0 Au wASNEp 914ft EO�f a l oo PLIi ��FCT9 pRO C f ��CpN� v"CYr 0 LEGEND P- PROPERTY LINE RIPRAP FOREBAY Qo PROPERTY CORNER WASHED STONE R/W DITCH CENTERLINE ROAD CENTERLINE PROPOSED SUBSTATION FENCE EXISTING CONTOURS PROPOSED CONTOURS EXISTING OVERHEAD POWER LINES RIGHT-OF-WAY per FILTER INLET PROTECTION PROPOSED ELECTRIC STRUCTURES VEGETATIVE SHELF CULVERT 1 18'0 X 50'L CLASS-5 RCP INSTALL WASHED STONE FILTER INLET PROTECTION INLET INVERT = EL 21.1 OUTLET INVERT - EL 21.0 MAINTENANCE ACCESS DRIVE RIPRAP FOREBAY N/F AARON GOODING DB. 592 PG. 503 ::�) VEGETATIVE SHELF CAPPED 6*0 PVC DRAIN PIPE EMERGENCY SPILLWAY W/ GRASS FILTER STRIP STABILIZED W/ STRAW AND NETTING CAUTION - ENERGIZED -OVERHEAD ELECTRIC LINES CCEC 12.47kV DISTRIBUTION �3 0 /Af +Nf 1g5�Rj �.,._<,'".. '•�-..,," 220 AfGNf SUS FORESTRY SERVICE 18. � X �, �.,.. 22.0 / TRACT 9 A � 22. s M' �IFpS��' R P"mar 220 n�CP \\ 3 s PA \ N Ari 377�C�RC 2 E U f 1q"W 39$, NC 2\ f0 wr •c Ra ' of LINE � SUBSTATION GRAVELLED AREA CLASS B RIPRAP STORMWATER MANAGEMENT PLAN POST -DEVELOPED SITE SCALE: 1 "=30'-O" PROPERTY AREA = 1.75 ACRES IMPERVIOUS AREA = 0.81 ACRES 30 0 30 60 90 GRAPHIC SCALE - FEET VICINITY MAP NTS DISCHARGE (Q) GRASS -LINED CHANNEL 1 Q1.5" = 0.34 cfs Q2 = 4.66 cfs Q10 = 9.19 cfs CULVERT 1 Q1.5" = 0.24 cfs Q2 = 4.66 cfs Q10=9.19cfs NET DETENTION BASIN OUTLET INFLOW AREA = 1.28 ACRES Q1.5" = 0.01 cfs Q2 = 0.06 cfs Q10 = 0.40 cfs VEGETATIVE SHELF PLANTING SCHEDULE: PERMANENT POOL (ELEVATION 20.0 TO 20.5) 1. SHALLOW WATER PLANT SPECIES' - IRIS VIRGINICA (SOUTHERN BLUE FLAG IRIS), ZIZANIOPSIS MILIACEA (GIANT CUTGRASS), PONTEDERIA CORDATA (PICKEREL WEED). 2. QUANTITY - 500 PLANTS (167 PLANTS OF EACH SPECIES LISTED ABOVE) 3. SIZE - MINIMUM OF 4 CUBIC -INCH CONTAINER 4. SPACING - 1.5 FEET ON CENTER (RECOMMENDED) 2.0 FEET ON CENTER (MAXIMUM) PLANT SPECIES MUST BE ALTERNATED IN EACH ROW. TEMPORARY POOL (ELEVATION 20.5 TO 21.0) 1. SHALLOW LAND PLANT SPECIES* - ASCLEPIAS INCARNATA (SWAMP MILKWEED), CAREX TENERA (QUILL SEDGE), CHELONE GLABRA (WHITE TURTLEHEAD). 2. QUANTITY - 500 PLANTS (167t PLANTS OF EACH SPECIES LISTED ABOVE) 3. SIZE - MINIMUM OF 4 CUBIC -INCH CONTAINER 4. SPACING - 1.5 FEET ON CENTER (RECOMMENDED) 2.0 FEET ON CENTER (MAXIMUM) PLANT SPECIES MUST BE ALTERNATED IN EACH ROW. • CONTACT LOCAL LANDSCAPER TO VERIFY PLANT APPROPRIATENESS AND AVAILABILITY. ALTERNATE NCDENR APPROVED SPECIES CAN BE FOUND IN THE NCDENR STORMWATER BMP MANUAL, PAGE 9-19, CHAPTER REVISED 07-10-09. IF A SPECIES IS RECOMMENDED AND IS NOT ON THE APPROVED LIST, CONTACT THE ENGINEER PRIOR TO INSTALLATION. NOTES: 1. THIS PROPERTY IS SUBJECT TO ANY AND ALL EASEMENTS, COVENANTS, RESTRICTIONS, RIGHT-OF-WAYS OF RECORD, GOVERNMENTAL ORDINANCES AND/OR REQUIREMENTS WHICH MAY EXIST AND LIMIT THE USE OF THIS PROPERTY. 2. THIS PARCEL IS NOT LOCATED WITHIN A FLOOD HAZARD AREA ACCORDING TO FEMA FLOOD INSURANCE RATE MAP (3720646000K PANEL 6460) 3. THERE ARE NO JURISDICTIONAL WATERS, INCLUDING WETLANDS, ON THE SITE. BOUNDARY AND TOPOGRAPHIC SURVEY PERFORMED BY: JAMES C. SIMMONS, JR. - PLS # 3992 JAMES C. SIMMONS AND ASSOCIATES PROFESSIONAL LAND SURVEYORS 603 WEBB BOULEVARD HAVELOCK, NC 28532 ('252) 447-1509 SEASONAL HIGH WATER TABLE hPrluvr0 ' 1. S.H.Wi ELEVATION = 6" (INFORMATION BASED ON SOIL BORINGS PERFORMED BY NORTH CAROLINA ENVIRONMENTAL GEOTECHNOLOGIES, INC. AND FIELD OBSERVATIONS BY BOOTH & ASSOCIATES, INC.) MANAGEMENT COMMISSION DIVISION OF WATER QUALITY REFERENCES 1�tt I! Date 20 GRADING & EROSION CONTROL PLAN/DETAILS '3081 (1 OF 2 / GR2 OF 2) I1 = Sto.,.;:,•,,•1;. PeintNe.=` t STORMWATER MANAGEMENT PLAN 3086836SM1 (SM1 OF 2) ~ DRAINAGE AREA MAP - PRE -DEVELOPED 3086836DAl (DA1 OF 2 / DA2 OF 2) .APR 2 5 2011 3f)868._isl;M1 LEGEND 0 N/F WEYERHAEUSER COMPANY DB. 358 PG. 457 — TRACT TWO FORMERLY NORTH CAROLINA PULP COMPANY (J.V BLADES TRACT) MB. 1 PG. 193 0 VeRNF 00 LE COeC 12 40 F�ec � CUIT ti4KV OISrRIBUTe S ON \ s r , 2R4NE Oli ^.,„ F -�� 4\= i, ro21, z� 0 -z' a 0 i 0 El }� N/F �WEYERHAEUSER C COMPANY rn DB. 358 PG. 457 — TRACT TWO m �h9~` " FORMERLY NORTH CAROLINA PULP COMPANY 0 p' (J.V BLADES TRACT) MB. 1 PG. 193 0 0 4 0 Qp S 12 6 37. SIT v� 0 2i0 LOW, WET AR C CARTERET—CRAVEN EMC DB. 2749 PG. 724 PC. H SL. 125—G 1.7545+/—AC 235 '1,3, `^•..... MSC WET AREAED h s �.t. OF PA �E \ es N 00 0 W ?86 \ NAG\ s\ �i 100 POBUO\Rlw \ Sl7g SE SEr 47C pMgRK 25. 0'" 23 5 23.0 NR 3�00„w S5230 . \/w n�uN£ STORMWATER MANAGEMENT PLAN ED PROPERTY LINE PRE —DEVELOPED SITE SCALE: 1"=30'—O" Q PROPERTY CORNER PROPERTY AREA = 1.75 ACRES IMPERVIOUS AREA = 0.00 ACRES DITCH CENTERLINE 30 0 30 60 90 ROAD CENTERLINE GRAPHIC SCALE - FEET R/W EXISTING CONTOURS PROPOSED CONTOURS EXISTING OVERHEAD POWER LINES RIGHT—OF—WAY N/F AARON GOODING DB. 592 PG. 503 N/F (:':/ US FORESTRY SERVICE � TRACT 9 40 34 W � Nc \ 3 OHUC? 77CC/E� 74"7-0 W 3 6 �N R2 n f\N *CHURCH' f VICINITY MAP NTS DISCHARGE Q1.5" = 0.14 cfs Q2 = 2.26 cfs 010 = 4.49 cfs SOIL TYPE Ly — LYNCHBURG FINE SANDY LOAM (ENTIRE SITE) :REFERENCE USDA NRCS SOILS REPORT IN EXHIBIT 8 OF THE STORMWATER MANAGEMENT PLAN NOTES: 1. THIS PROPERTY IS SUBJECT TO ANY AND ALL EASEMENTS, COVENANTS, RESTRICTIONS, RIGHT—OF—WAYS OF RECORD, GOVERNMENTAL ORDINANCES AND/OR REQUIREMENTS WHICH MAY EXIST AND LIMIT THE USE OF THIS PROPERTY. 2. THIS PARCEL IS NOT LOCATED WITHIN A FLOOD HAZARD AREA ACCORDING TO FEMA FLOOD INSURANCE RATE MAP (3720646000K PANEL 6460) 3. THERE ARE NO JURISDICTIONAL WATERS, INCLUDING WETLANDS, ON THE SITE. BOUNDARY AND TOPOGRAPHIC SURVEY PERFORMED BY: JAMES C. SIMMONS, JR. — PLS # 3992 JAMES C. SIMMONS AND ASSOCIATES PROFESSIONAL LAND SURVEYORS 603 WEBB BOULEVARD HAVELOCK, NC 28532 (252) 447-1509 SEASONAL HIGH WATER TABLE 1. S.H.W.T ELEVATION = 6" (INFORMATION BASED ON SOIL BORINGS PERFORMED BY GEOTECHNOLOGIES, INC. AND FIELD OBSERVATIONS BY BOOTH & ASSOCIATES, INC.) P DPROVED NORTH �,-.ROLINA ENVIRONMENTAL MANA3EMENTCOMMISSION - DIVISION OF WATER QUALITY REFERENCES Dare 20i 1 SRADING & EROSION CONTROL PLAN/DETAILS 3086836GR1 (GR1 OF 2 / GR2 OF 2) STORMWATER MANAGEMENT PLAN — POST —DEVELOPED 3086836SM1 (SM2 OF 2) DRAINAGE AREA MAP 3086836DAl (DA1 OF 2 / DA2 OF 2) 3 2011 .-inmR.3RSM1 2� Os a z' �o 0 i 0 0 c m El A � p6 Qom• "' O y. � p1 a 07 Q CARTERE -CRAVEN EMC SI vim' s DB. 49 PG. 724 Q PC. SL. 125-G - S 70 ��� �.?•_ 1.7 45+/-AC / 7256,37"F N LEGEND VICINITY MAP NTS N/F WEYERHAEUSER COMPANY DB. 358 PG. 457 - TRACT TWO FORMERLY NORTH CAROLINA PULP COMPANY (J.V BLADES TRACT) MB. 1 PG. 193 CAUTION ENERGIZED OVERHEAD ELECTRIC LINES CCEC 12.47kV DISTRIBUTION ��RCINE DIiCN "'`+. 'i OF T \ \ 0( \ GRASS -LINED CHANNEL 1. (PHASE 1) 46' a -.. a• " �` AA s .♦. �' $' .• �'. A A .•. �• si: T' 4 t A ,•.� N • i �� • • .' ar N A • N9 190k: SEE GR2. FOR INVER 4 d ..d : .9LO; a 571E H N' A c BEr �C J M a ♦ "a T N A Rk A p 0 .f t ry `. \ IN, a Eql, Z\ /8 0 n INST Wq��SS`5 C 1?0 ECC- r � PNA l) �- PROPERTY LINE SS LINED CHANNEL NTAH STRAW & NETTING Qo PROPERTY CORNER R/W DITCH CENTERLINE ROAD CENTERLINE SILT FENCE PROPOSED SUBSTATION FENCE CONSTRUCTION LIMIT EXISTING CONTOURS PROPOSED CONTOURS EXISTING OVERHEAD POWER LINES RIGHT-OF-WAY TEMPORARY BAFFLES Cb WASHED STONE FILTER INLET PROTECTION PROPOSED ELECTRIC STRUCTURES 4 4 A A 4 4 4 A A A A A ". 4 ®d .'a . = ?r _ a N/F WEYERHAEUSER COMPANY DB. 358 PG. 457 - TRACT TWO FORMERLY NORTH CAROLINA PULP COMPANY (J.V BLADES TRACT) MB. 1 PG. 193 A ^A E _A A CULVERT 1 IWO X 50'L CLASS-5 RCP (PHASE 1) INSTALL WASHED STONE FILTER INLET PROTECTION INLET INVERT - EL 21.1 OUTLET INVERT - EL 21.0 MAINTENANCE ACCESS DRIVE RIPRAP FOREBAY (PHASE II) (SEE GR2 FOR LOCATION) TEMPORARY BAFFLES (PHASE 1) (SEE GR2 FOR LOCATION) VEGETATIVE SHELF (PHASE 11) SKIMMER DEVICE PHASE I (SEE GR2 FOR INVERTS) EMERGENCY SPILLWAY W/ GRASS FILTER STRIP STABILIZED W/ STRAW AND NETTING (PHASE 1) 22 CAUTION ENERGIZED x OVERHEAD ELECTRIC LINES ' CCEC 12.47kV DISTRIBUTION N/F AARON GOODING DB. 592 PG. 503 3\NR�lw O0" W 552.3p. nE -4-1 g5-KT \ 220 UNf N/F ',, •.:,;, US FORESTRY SERVICE /^gs� X SO � - 22 0 TRACT 9 PROre, OIvE �� (PyA Nam\ NO 63. HO 2 4CwU3 5, 0'C S �>\ NC(M CHURCH' 4' yORP2 �E N f v 1. •r '.. mow; y'• -• '•�• VEGETATIVE SHELF ^'. CONSTRUCTION "'' ENTRANCE SUBSTATION GRAVELLED AREA CLASS B RIPRAP ADDITIONAL BASIN DEPTH TO BE DUG DURING PHASE II OF CONSTRUCTION GRADING AND EROSION CONTROL PLAN SCALE: 1"-30'-0" PROPERTY 4REA = 1.75 ACRES APPROXIMATE DISTJRBED AREA = 1.76 ACRES IMPERVIOUS AREA = 0.81 ACRES 30 0 30 60 90 GRAPHIC SCALE - FEET REFERENCES NOTES: TEMPORARY SEEDING: 1. a) SEED MIXTURE (MAY TO AUGUST) - USE 401b/ACRE GERMAN MILLET. b) SEED MIXTURE (JANUARY TO MAY, AUGUST TO DECEMBER) - USE 1201b/ACRE RYE (GRAIN). 2. LIME - APPLY 20001b/ACRE GROUND AGRICULTURAL LIMESTONE AND 7501b/ACRE 10-10-10 FERTILIZER. 3. MULCH - APPLY 40001b/ACRE STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, OR MULCH ANCHORING TOOL. PERMANENT SURFACE STABILIZATION: 1. SEED MIXTURE - USE 2001b/ACRE TALL FESCUE, 101b/ACRE RYE (GRAIN) 2. LIME - APPLY 40001b/ACRE GROUND AGRICULTURAL LIMESTONE AND 10001b/ACRE 10-10-10 FERTILIZER. 3. MULCH - APPLY 40001b/ACRE STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, ROVING, OR NETTING. 4. SEEDBED PREPARATION AND MAINTENANCE - LOOSEN SOIL JUST PRIOR TO SEEDING BY DISKING, RAKING, HARROWING, OR AN EQUALLY SUITABLE METHOD. ALL SEEDED AREAS WILL BE FERTILIZED, RESEEDED AS NECESSARY AND MULCHED. 5. INSTALL APPLICABLE E&S CONTROL MEASURES PRIOR TO ONSET OF ANY DEMOLITION OR LAND DISTURBING ACTIVITIES. DISTURB ONLY WHAT IS NECESSARY TO INSTALL APPLICABLE E&S CONTROL MEASURES. VEGETATION TO BE ESTABLISHED ON SLOPES OR OTHER AREAS WITHIN 21 CALENDAR DAYS OF COMPLETION FOR ANY PHASE OF GRADING ACTIVITIES. INSTALL PERMANENT GROUND COVER FOR ALL DISTURBED AREAS WITHIN 15 WORKING DAYS OR 90 CALANDER DAYS (WHICHEVER IS SHORTER) FOLLOWING COMPLETION OF CONSTRUCTION DEVELOPMENT. VEGETATIVE SHELF PLANTING SCHEDULE: PERMANENT POOL (ELEVATION 20.0 TO 20.5) 1. SHALLOW WATER PLANT SPECIES* - IRIS VIRGINICA (SOUTHERN BLUE FLAG IRIS), ZIZANIOPSIS MILIACEA (GIANT CUTGRASS), PONTEDERIA CORDATA (PICKEREL WEED). 2. QUANTITY - 500 PLANTS (167 PLANTS OF EACH SPECIES LISTED ABOVE) 3. SIZE - MINIMUM OF 4 CUBIC -INCH CONTAINER 4. SPACING - 1.5 FEET ON CENTER (RECOMMENDED) 2.0 FEET ON CENTER (MAXIMUM) PLANT SPECIES MUST BE ALTERNATED IN EACH ROW. TEMPORARY POOL (ELEVATION 20.5 TO 21.0) 1. SHALLOW LAND PLANT SPECIES' - ASCLEPIAS INCARNATA (SWAMP MILKWEED), CAREX TENERA (QUILL SEDGE), CHELONE GLABRA (WHITE TURTLEHEAD). 2. QUANTITY - 500 PLANTS (167t PLANTS OF EACH SPECIES LISTED ABOVE) 3. SIZE - MINIMUM OF 4 CUBIC -INCH CONTAINER 4. SPACING - 1.5 FEET ON CENTER (RECOMMENDED) 2.0 FEET ON CENTER (MAXIMUM) PLANT SPECIES MUST BE ALTERNATED IN EACH ROW. • CONTACT LOCAL LANDSCAPER TO VERIFY PLANT APPROPRIATENESS AND AVAILABILITY. ALTERNATE NCDENR APPROVED SPECIES CAN BE FOUND IN THE NCDENR STORMWATER BMP MANUAL, PAGE 9-19, CHAPTER REVISED 07-10-09. IF A SPECIES IS RECOMMENDED AND IS NOT ON THE APPROVED LIST, CONTACT THE ENGINEER PRIOR TO INSTALLATION. CONSTRUCTION SEQUENCE: 1r OBTAIN PLAN APPROVAL AND OTHER APPLICABLE PERMITS. 2. INSTALL STORMWATER INSPECTION BOX WITH RAIN GAUGE, STORMWATER INSPECTION REPORT, AND A COPY OF ALL PERMITS. PHASE I 3. FLAG CONSTRUCTION LIMITS AND CLEAR WHAT IS NECESSARY TO INSTALL SILT FENCING. 4. INSTALL CONSTRUCTION ENTRANCE AND ROADSIDE CULVERTS WITH INLET AND OUTLET PROTECTION. 5. CLEAR WHAT IS NECESSARY TO INSTALL THE GRASS -LINED CHANNEL, CULVERTS, TEMPORARY SEDIMENT BASIN. THE TEMPORARY SEDIMENT BASIN SHALL BE DUG TO AN ELEVATION DEPTH OF 20. ONCE THE BASIN IS DUG, INSTALL SKIMMER DEVICE, RISER BOX, AND TEMPORARY BAFFLES. THE PVC FITTING ON THE CONCRETE RISER BOX IS TO REMAIN CAPPED AND OFF-LINE UNTIL PHASE II. 6. ONCE THE TEMPORARY BASIN SEDIMENT A G - E S AND GRASS -LINED CHANNEL IS STABILIZE D AND OPERATIONAL, COMPLETE THE REMAINDER OF THE SITE CLEARING. TOPSOIL AND DEBRIS SHALL BE TEMPORARILY STOCKPILED WITHIN THE CONST RUCTION LIMITS. THE STOCKPILE LOCATION SHALL BE SURROUNDED N DE 0 THREE (3) SIDES BY SILT FENCE WITH ONE (1) SIDE OPEN TO EARTH MOVING EQUIPMENT. THE OPEN SIDE SHALL BE ORIENTED IN A DIRECTION THAT DOES NOT ALLOW RUNOFF TO ESCAPE THE SILT FENCING. LIMIT STOCKPILE TO A MAXIMUM HEIGHT OF TEN (10) FEET WITH A MAXIMUM SIDE SLOPE OF 3:1. REMOVAL OF THE STOCKPILE SHALL BE TO A NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES (NCDENR) PERMITTED LOCATION. 7. COMPLETE GRADING AND VEGETATE AND MULCH IMMEDIATELY. 8. FINALIZE THE INSTALLATION OF THE ACCESS DRIVES AND STABILIZE ALL DISTURBED AREAS BY SEEDING AND MULCHING. 9. ALL EROSION AND SEDIMENT CONTROL PROPERTIES WILL BE INSPECTED WEEKLY AND AFTER EACH SIGNIFICANT RAINFALL EVENT. NEEDED REPAIRS WILL BE MADE IMMEDIATELY WEEKLY AND AFTER EACH SIGNIFICANT RAINFALL EVENT. 10. AFTER THE SUBSTATION SITE IS STABILIZED, HAS BEEN STONED BY OTHERS, AND HAS NO MORE DISTURBANCE EXPECTED, REMOVE ALL TEMPORARY SEDIMENT CONTROL MEASURES. THE TEMPORARY SEDIMENT BASIN WILL BE CONVERTED INTO A PERMANENT WET DETENTION BASIN. REMOVE THE COIR-MESH BAFFLES. REMOVE ACCUMULATED SEDIMENT AND DIG BASIN TO AN ELEVATION DEPTH OF 16. REMOVE THE SKIMMER DEVICE FROM THE 6" PVC PIPE AND CAP THE PIPE. INSTALL THE VEGETATIVE SHELF AND THE RIPRAP FOREBAY. THE VEGETATIVE SHELF WILL BE PLANTED WITH THE SPECIES NOTED IN THE OUTLINED VEGETATIVE SHELF NOTES ABOVE. ALL ACCUMULATED SEDIMENT WILL BE REMOVED OFF SITE TO A (NCDENR) PERMITTED LOCATION. STABILIZE ANY DISTURBED AREAS APPROPRIATELY AND INSTALL PERMANENT VEGETATION AS NECESSARY. THE PERIMETER SILT FENCING SHALL REMAIN UNTIL PERMANENT VEGETATION IS ESTABLISHED. 11. ESTIMATED TIME BEFORE FINAL STABILIZATION - FIVE (5) MONTHS. GRADING AND BACKFILL MATERIAL: 1. PROPOSED CONTOURS REPRESENT SUBGRADE ELEVATIONS. 2. ALL GRADED AREA WITHIN NEW FENCE SHALL RECEIVE 6" OF STONE (3" CRUSHER RUN AND 3" OF 1 1/2" WASHED STONE), TO BE PROVIDED BY OTHERS. 3. ALL VEGETATION AND DEBRIS SHALL BE REMOVED FROM THE CONSTRUCTION AREA, SUBGRADE SOILS SHALL BE FREE OF ORGANIC MATERIAL AND COMPACTED PRIOR TO THE PLACEMENT OF FILL MATERIAL. 4, ALL FILL MATERIAL USED AT THE SITE SHALL UTILIZE A LOW PLASTICITY SOIL (LIQUID LIMIT LESS THAN 50, PLASTICITY INDEX LESS THAN 25), FREE OF ORGANIC MATERIAL OR DEBRIS. 5. THE GRADING CONTRACTOR SHALL BE RESPONSIBLE FOR HIRING A REPUTABLE GEOTECHNICAL ENGINEERING FIRM, APPROVED BY THE OWNER OR ENGINEER, TO PERFORM LABORATORY AND FIELD TESTING OF BACKFILL MATERIAL AT THE CONTRACTOR'S EXPENSE. 6. A STANDARD PROCTOR COMPACTION TEST SHALL BE PERFORMED BY THE APPROVED GEOTECHNICAL ENGINEERING FIRM ON THE MATERIAL TO BE USED AS BACKFILL. 7, ALL FILL MATERIAL SHALL BE PLACED IN LIFTS NOT TO EXCEED 12". 8 FIELD COMPACTION TESTS SHALL BE TAKEN BY THE GEOTECHNICAL ENGINEERING FIRM FROM EACH FILL VOLUME MEASURING 2000ft2 MAXIMUM x 12" DEEP. 9. ALL FILL AREAS SHALL BE COMPACTED TO AT LEAST 95% OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY. 10. CONTRACTOR IS RESPONSIBLE TO VERIFY LOCATION OF UNDERGROUND FACILITIES PRIOR TO CONSTRUCTION. GRADING & EROSION CONTROL DETAILS 3086836GR1 (GR2 OF 2) STORMWATER MANAGEMENT PLAN 3086836SM1 (SM1 OF 2 / SM2 OF 2) DRAINAGE AREA MAP 3086836DAl (DA1 OF 2 / DA2 OF 2) BOUNDARY AND TOPOGRAPHIC SURVEY PERFORMED BY: JAMES C. SIMMONS, JR. - PLS # 3992 JAMES C. SIMMONS AND ASSOCIATES PROFESSIONAL LAND SURVEYORS 603 WEBB BOULEVARD HAVELOCK, NC 28532 (252) 447-1509 SEASONAL HIGH WATER TABLE 1. S.H.W.T ELEVATION = 6" (INFORMATION BASED ON SOIL BORINGS PERFORMED BY GEOTECHNOLOGIES. INC. AND FIELD OBSERVATIONS BY BOOTH & ASSOCIATES, INC.) APR 2 5 2pi1 N.C.D.O.T. NOTES CCEC HAS CONTACTED AND RECEIVED APPROVAL FROM THE NCDOT TO IMPROVE THE ROADSIDE DITCHES IN THE RIGHT-OF-WAY. 30868.3fiGRl EL. 23 STEEL FENCE �.EL.20.5--------- 0 (41 X 4'W X 4-H) CONCRETE RISER BOX WITH TRASH GUARD TOP INLET EL. 22 BOTTOM EL. 18 47.0' 47.0' 3AFFLE SPACING) (BAFFLE SPACING) 4" PVC TEE 1\ W/1.5"0 AP C PVC EL 20.; TEMPORARY POOL VC CAP - --- PERMANENT POOL -r - --EL.20.5 --- ELI IPRAP FOREBAY TO BE INSTALLED//\�//\�//\�/��/�C�/•<i "" - " "'" ' DURING PHASE / CROSS SECTION TEMPORARY SEDIMENT / WET DETENTION BASIN N.T.S. TEMPORARY SEDIMENT/WET DETENTION BASIN DESCRIPTION # DESCRIPTION # DESCRIPTION / LENGTH ®EL. 20.5 (FT) 164 EMERGENCY SPILLWAY LEVATI N 22 RISER BOX LENGTH (FT.) 4 WIDE 0 EL. 20.5 (FT) 36 ELEVA11ONM 23 RISER BOX WIDTH (FT.) 4 BASIN BOTTOM ELEVATION 16 PERMANENT POOL RISER BOX HEIGHT (FT.) 4 PERMANENT POOL EL. 20.5 SURFACE AREA (FT� 5,904 BARREL DIAMETER (IN) 12 TEMPORARY POOL EL. 22 STORAGE VOLUME (FT3) 13,085 FOUNDATION BLOCK LENGTH (FT.) 4 RISER ELEVATION 22 TEMPORARY POOL FOUNDATION BLOCK WDTH (FT.) 4 PVC TEE 0 (IN) 4 SURFACE AREA (FT� 9,360 FOUNDATION BLOCK HEIGHT (FT.) 1 PVC CAP HOLE 0 (IN) 1.5 STORAGE VOLUME (FT3) 12,159 FOREBAY RIPRAP HEIGHT (FT.) 4 "MAINTENANCE' INSPECT TEMPORARY SEDIMENT BASINS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (1/2" OR GREATER) RAINFALL EVENT AND REPAIR IMMEDIATELY. REMOVE SEDIMENT AND RESTORE THE BASIN TO ITS ORIGINAL DIMENSSION WHEN IT ACCUMULATES TO ONE-HALF THE DESIGN DEPTH. PLACE REMOVED SEDIMENT IN AN AREA WITH SEDIMENT CONTROLS. CHECK THE EMBANKMENT, SPILLWAYS, AND OUTLET FOR EROSION DAMAGE, AND INSPECT THE EMBANKMENT FOR PIPING AND SETTLEMENT. MAKE ALL NECESSARY REPAIRS IMMEDIATELY. REMOVE ALL TRASH AND OTHER DEBRIS FROM THE RISER AND POOL AREA. UPSTREAM END OF STORM DRAIN WASHED STONE FILTER ACROSS PIPE INLET HARDWARE CLOTH WASHED STONE FILTER INLET PROTECTION FOR STORM DRAIN UNDER CONSTRUCTION N.T.S. OVERFLOW 1/3 PIPE DIA. VEGETATIVE SHELF 10:1 MIN. SLOPE TOP EL 21.0 EL. 23.5 BOTTOM EL. 20.0 CLASS-B RIPRAP CHANNEL -BERM ELEVATION FROM GRl OF 2 10.0' PLUS 6" FOR SETTLEMENT* EL.22 GRASS BUFFER W/ STRAW AND NETTING INLET INVERT ,� EMERGENCY EL.20 JI� �.���`�`�`)'��`•,`"�'`)")"`%Y `Y EL. L 22Y BLOCK BOTTOM EL.17 o TRASH GUARD 4" PVCW NTEMPORARY PLUG POOL EL. 22---�---- PERMANENT POOL a zo EL.20.5- - -I------- " o m ulm 4" PVC wo 0 n m EL.20 ------- - - X w TEMPORARY SEDIMENT BASIN BOTTOM - (PHASE 1) EL.23 i EL.20 ; INVERT EL19.5 --- -------�L.22- - - - - --EL.20.5--EL.21- _--_-_-_-_- EL. 23.5 OVER FILL 6" FOR SETTLEMENT CLASS B RIPRAP _ EMERGENCY SPILLWAY SECTION SKIMMER DEWATERING DEVICE - - --- EXISTING - ROAD SIDE DITCH SKIMMER DEWATERING DEVICE INSTALLATION INLET EL.205RT WET DETENTION BASIN BOTTOM (PHASE II) N.T.S. *NOTE* ONCE THE TEMPORARY SEDIMENT BASIN IS CONVERTED TO A WET -DETENTION BASIN THE SKIMMER DEWATERING DEVICE WILL BE REMOVED FROM THE 6"0 X 451 SCHEDULE 40 PVC PIPE AND THE PIPE SHALL BE CAPPED. SUPPORT POST, SUPPORT ROPE TO 24" INTO BOTTOM WIRE PTO PREVENT OR SIDE -j BAFFLE =Mrr -7 STAKE TO SUPPORT WIRE IRGYVfIGU IIY IV [JVI IVM VIA JNC *MAINTENANCE* INSPECT BAFFLES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REPAIRS IMMEDIATELY. BE SURE TO MAINTAIN ACCESS TO THE BAFFLES. SHOULD THE FABRIC OF THE BAFFLES COLLAPSE, TEAR, DECOMPOSE, OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY. REMOVE SEDIMENT DEPOSITS WHEN IT REACHES HALF FULL TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE BAFFLES. TAKE CARE TO AVOID DAMAGING THE BAFFLES DURING CLEANOUT. SEDIMENT DEPTH SHOULD NEVER EXCEED HALF THE DESIGNED STORAGE DEPTH. AFTER THE CONTRIBUTING DRAINAGE HAS BEEN PROPERLY STABILIZED, REMOVE ALL BAFFLE MATERIALS AND UNSTABLE SEDIMENT DEPOSITS, BRING THE AREA TO GRADE AND STABILIZE IT. EL.22 VEGETATIVE SHELF 10:1 SLOPE o 0 INLET INVERT = EL.20 BARREL 45' X 12"0 RCP 4" PVC CAP EL.20. m� EL.18 W/1.5"0 HOLE nro 4'X4'Xt' EL.17 MIN 50 � 2"-3" COARSE y AGGREGATE ')t �p 'r ".d' ° _ 'O•y. *.' STABILIZE d • WITH GRASS � ra • 0 cl GEOTEXTILE NON -WOVEN FABRIC \° d 18"dia. X 50'L CLASS-5 RCP CULVERT ' \\/ *MAINTENANCE* - MAINTAIN THE GRAVEL PAD IN A CONDITION TO PREVENT MUD OR SEDIMENT FROM LEAVING THE CONSTRUCTION SITE. THIS MAY REQUIRE PERIODIC TOPERESSING WITH 2-INCH STONE. AFTER EACH RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP SEDIMENT AND CLEAN IT OUT AS NECESSARY. IMMEDIATELY REMOVE ALL OBJECTIONABLE MATERIALS SPILLED, WASHED, OR TRACKED ONTO PUBLIC ROADWAYS. PUBLIC ROAD CONSTRUCTION ENTRANCE/EXIT DETAIL N.T.S. Ku CONCRETE ANTI -FLOTATION BLOCK RISER -BOX SECTION 12" BED OF COMPACTED CRUSHER RUN ---\ WIDTH/2 BAFFLE DETAIL N.T.S. OUTLET INVERT EL.19.5 OUTLET INVERT EL.19.5 6"0 X 45'L SCHEDULE 40 PVC PERSPECTIVE VIEW ENCLOSURE 1TER ENTRY UNIT PVC ELBOW 2" SCHEDULE 40 PVC END PVC PIPE CAP - WATER SURFACE - PVC END PVC TEE CAP 1.5" ORIFICE PLATE PVC TEE 1.5" SCHEDULE 40 PVC PIPE SUBGRADE PVC PIPE ELEVATION 1/2" HOLE IN WIDTH/2 UNDERSIDE 1�.v1/�,v13ib END VIEW FRONT VIEW 6 OZ. NON-WOVEW,//<' COMPACTED GEOTEXTILE FABRIC UNDER NATIVE SOIL CRUSHER RUN *MAINTENANCE* INSPECT CONSTRUCTION ROADS AND PARKING AREAS PERIODICALLY FOR CONDITION OF SURFACE. TOPDRESS WITH NEW GRAVEL AS NEEDED. CHECK ROAD DITCHES AND OTHER SEEDED AREAS FOR EROSION AND SEDIMENTATION AFTER RUNOFF -PRODUCING RAINS. MAINTAIN ALL VEGETATION IN A HEALTHY, VIGOROUS CONDITION. SEDIMENT -PRODUCING AREAS SHOULD BE TREATED IMMEDIATELY. GRAVEL ACCESS DRIVE GEOTEXTILE NON -WOVEN FABRIC REFERENCE MAINTENANCE REQUIREMENTS IN THE PLAN BOOK HIIIIIIIIIIIIII M\\ V BOTTOM SURFACE SKIMMER DEWATERING DEVICE N.T.S. N.T.S. GRADING AND EROSION CONTROL DETAILS SCALE: N.T.S. MIN. 10 GA. LINE WIRES REFERENCES GRADING & EROSION CONTROL PLAN 3086836GR1 (GR1 OF 2) STORMWATER MANAGEMENT PLAN 3086836SM1 (SM1 OF 2 / SM2 OF 2) DRAINAGE AREA MAP 3086836DAl (DA1 OF 2 / DA2 OF 2) 1. SET STEEL POSTS 2'-0" DEEP AND EXCAVATE 3. ATTACH THE SILT FENCE GEOTEXTILED A 4" X 8" TRENCH UPSLOPE ALONG THE LINE FABRIC TO THE SECOND WIRE FROM OF POSTS. THE TOP ON THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. 2. ATTACH WIRE FENCING TO 4. THE END OF THE SILT FENCE NEEDS THE POSTS. TO BE TURNED UPHILL 5. BACKFILL AND COMPACT THE EXCAVATED SOIL. 8' / PLASTIC OR WIRE TIES / / MIN. 12-1/2 GA. / / INTERMEDIATE WIRES --mac El III = I �, "�•:� •:::::., -I I1=1I I- EXTENSION OF FABRIC AND 8-MIN. WIRE INTO THE TRENCH-il ;f•.'.;: III=III- I' M�tJ• STEEL POST IFILTER FABRIC *MAINTENANCE* =1- INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK .- AND AFTER EACH RAINFALL. MAKE ANY REQUIRED BACKFILL TRENC/ \ REPAIRS IMMEDIATELY. SHOULD THE FABRIC OF A AND COMPACT / SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE OR THOROUGHLY BECOME INEFFECTIVE, REPLACE IT PROMPTLY. REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE FENCE. REMOVE ALL FENCING MATERIALS AND UNSTABLE SEDIMENT DEPOSITS AND BRING THE AREA TO GRADE AND STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED. CONSTRUCTION OF A SILT FENCE N.T.S. TEMPORARY LINER; STRAW MULCH HELD IN PLACE WITH PLASTIC OR JUTE NETTING N.T.S. T s."-• �z � �r� ..�•«Z��•Zd•O�g• OPE E:D E: GRASS -LINED CHANNEL DIMENSION CHART CHANNEL # T D B E SLOPE 1 11' 2' 3' 4' 2:1 *MAINTENANCE* DURING THE ESTABLISHMENT PERIOD, CHECK GRASS -LINED CHANNELS AFTER EVERY RAINFALL. AFTER GRASS IS ESTABLISHED, PERIODICALLY CHECK THE CHANNEL; CHECK IT AFTER EVERY HEAVY RAINFALL EVENT. IMMEDIATELY MAKE REPAIRS. IT IS PARTICULARLY IMPORTANT TO CHECK THE CHANNEL OUTLET AND ALL ROAD CROSSINGS FOR BANK STABILITY AND EVIDENCE OF PIPING OR SCOUR HOLES. REMOVE ALL SIGNIFICANT SEDIMENT ACCUMULATIONS TO MAINTAIN THE DESIGNED CARRYING CAPACITY. KEEP THE GRASS IN A HEALTHY VIGOROUS CONDITION AT ALL TIMES, SINCE IT IS THE PRIMARY EROSION PROTECTION FOR THE CHANNEL. GRASS -LINED CHANNELS WITH STRAW AND NETTING N.T.S. APR 2 5 2011 IN 30868.36(lR1