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Home My WebLink About3---2021-01-04-PLD-ESC-PlansTRIANGLE QUARRY �,5q0 RDU COUNTY AIRPORT LINE UMSTEAD STATE LAKE SITE PARK CRABTREE EXIST QUARRY NC-54 NORTH VICINITY MAPNTS PROJECT NARRATIVE THE PURPOSE OF THIS CONSTRUCTION ACTIVITY IS TO CLEAR THE SITE (WEST OF CRABTREE CREEK) TO ACCOMMODATE THE MINING OPERATION, AND TO IMPROVE THE EXISTING MINING ROAD (EAST OF CRABTREE CREEK). NPDES NOTES: I. SEDIMENT BASIN OUTLET STRUCTURES: SEDIMENT BASINS AND TRAPS WITH DRAINAGE AREAS OF ONE ACRE OR GREATER SHALL USE OUTLET STRUCTURES THAT WITHDRAW WATER FROM THE SURFACE. - RDU EXPANSION EROSION CONTROL PLAN WAKE COUNTY, NORTH CAROLINA / ell /�/�%/I (/+Illllr 1i11JO1\i� \ \ \ \ (/lI // I � _ �\\Q\O� \\� 1 �\� K \ I l - �1111 Uj�� i//IJI1\ I � //�� xxt�'9, ��✓ill /�'lll ! J ---�� \_ \illll(�I(( Illlll(�\\\\\�\ \ I \ �\ IJ � \lll( J�l((lrl/� (\\\1\Illlt� I \��lJ\1\\�\2 �\\��\� ��_,�� i, �I /� rrqyxn��\\\\ \ `TRIANGLE QUARRY (I \\\ EXPANSION 11111 JIIJ<<z�� EXISTING QUARRY ROAD lj/r &\\��=�1\l\\Ili\ IMPROVEMENTS / EXISTING QUARRY;;;;; / NEW QUARRY EXPANSION CONSTRUCTION SCHEDULE PHASE 1 1. OBTAIN LAND -DISTURBING / MINING PERMIT. 2. IMPROVE EXISTING ENTRANCE FROM OLD REEDY CREEK ROAD AS ILLUSTRATED ON APPROVED PLAN FOR EQUIPMENT AND MATERIAL ACCESS. 3. REMOVE TIMBER ONLY AS NEEDED FOR ACCESS AND INSTALLATION OF EROSION CONTROL MEASURES AND FOR CONSTRUCTION OF PROPOSED SECURITY FENCE. INSTALL TEMPORARY DIVERSIONS WITH LINERS AS SPECIFIED ON THE CHART ON THE DETAIL SHEET, SILT FENCE, SEDIMENT BASINS OR OTHER MEASURES AS SHOW ON THE APPROVED PLAN. CLEAR ONLY AS NECESSARY TO INSTALL THESE DEVICES. SEED TEMPORARY DIVERSIONS, BERMS AND BASINS IMMEDIATELY AFTER CONSTRUCTION. MAINTAIN DEVICES AS NEEDED. * CONSTRUCTION OF THE DIVERSION CHANNEL WITH REQUIRED LINER ON THE EASTERN SIDE, ADJACENT TO CRABTREE CREEK, SHALL BE CONSTRUCTED IN AN EXPEDIENT MANNER, AND VEGETATION ESTABLISHED IMMEDIATELY AFTER CONSTRUCTION. ENSURE SILT FENCE AT TOE OF SLOPE IS INSTALLED AND FUNCTIONING AT ALL TIMES. 4. PROCEED TO PHASE 2. PHASE 2 5. RELOCATE THE CONSTRUCTION ENTRANCE AS SHOWN ON PLAN. 6. BEGIN CONSTRUCTION OF PERMANENT BERM. INSTALL RCP CROSS PIPES AS SHOWN ON PLAN. 7. STABILIZE BERM AS AREAS ARE BROUGHT UP TO FINISH GRADE WITH VEGETATION. SEED AND MULCH DENUDED AREAS PER GROUND STABILIZATION TIME FRAMES. 8. ALL REMAINING PERMANENT EROSION CONTROL DEVICES SUCH AS VELOCITY DISSIPATERS SHOULD BE INSTALLED NOW. 9. ONCE PROPOSED ACCESS BRIDGE IS CONSTRUCTED, BEGIN CLEARING AND GRUBBING. LOG TRUCKS WILL LEAVE THE SITE VIA THE EXISTING QUARRY ENTRANCE 10. MAINTAIN DEVICES AS NEEDED. RELOCATE EROSION CONTROL DEVICES AS NEEDED TO ACCOMMODATE CONSTRUCTION. 11. NO EROSION CONTROL MEASURES SHALL BE REMOVED WITHOUT THE APPROVAL OF THE ENVIRONMENTAL ENGINEER. 12. NCDEQ OR NCDEMLR RESERVE THE RIGHT TO REQUIRE THE PERMITTEE TO PROVIDE ADDITIONAL EROSION CONTROL MEASURES SHOULD THE PLAN OR ITS IMPLEMENTATION PROVE TO BE INADEQUATE. 13. STABILIZE SITE AS AREAS ARE BROUGHT UP TO FINISH GRADE WITH VEGETATION. SEED AND MULCH DENUDED AREAS WITHIN (21) CALENDAR DAYS OF COMPLETION OF ANY PHASE OF CONSTRUCTION. PERMANENT GROUND COVER SHALL BE INSTALLED ON ALL DISTURBED AREAS WITHIN 15 WORKING DAYS OR 90 CALENDAR DAYS (WHICHEVER IS SHORTER) FOLLOWING COMPLETION OF CONSTRUCTION OR DEVELOPMENT. 1 r VICINITY MAP SCALE: 1 " = 500' EXISTING QUARRY ROAD IMPROVEMENTS CONSTRUCTION SCHEDULE PHASE 1 1. OBTAIN LAND -DISTURBING / MINING PERMIT. 2. PROCEED WITH TIMBERING OPERATIONS. NO STUMP REMOVAL IS ALLOWED. INSTALL TEMPORARY DIVERSIONS, SILT FENCE, SEDIMENT BASINS OR OTHER MEASURES AS SHOWN ON THE APPROVED PLAN. CLEAR ONLY AS NECESSARY TO INSTALL THESE DEVICES. SEED TEMPORARY DIVERSIONS, BERMS AND BASINS IMMEDIATELY AFTER CONSTRUCTION. 3. BEGIN CLEARING AND GRUBBING. MAINTAIN DEVICES AS NEEDED. 4. PROCEED TO PHASE 2. PHASE 2 5. BEGIN EXPANSION OF EXISTING QUARRY ROAD. INSTALL CONCRETE BLOCK WALLS WHEN REQUIRED AS FILLING OCCURS. STABILIZE AS AREAS ARE BROUGHT UP TO FINISH GRADE WITH VEGETATION. SEED AND MULCH DENUDED AREAS PER GROUND STABILIZATION TIME FRAMES. 6. ALL REMAINING PERMANENT EROSION CONTROL DEVICES SUCH AS VELOCITY DISSIPATERS SHOULD BE INSTALLED NOW. 7. MAINTAIN DEVICES AS NEEDED. RELOCATE EROSION CONTROL DEVICES AS NEEDED TO ACCOMMODATE CONSTRUCTION. 8. NO EROSION CONTROL MEASURES SHALL BE REMOVED WITHOUT THE APPROVAL OF THE ENVIRONMENTAL ENGINEER. 9. NCDEQ OR NCDEMLR RESERVE THE RIGHT TO REQUIRE THE PERMITTEE TO PROVIDE ADDITIONAL EROSION CONTROL MEASURES SHOULD THE PLAN OR ITS IMPLEMENTATION PROVE TO BE INADEQUATE. 10. STABILIZE SITE AS AREAS ARE BROUGHT UP TO FINISH GRADE WITH VEGETATION. SEED AND MULCH DENUDED AREAS WITHIN (21) CALENDAR DAYS OF COMPLETION OF ANY PHASE OF CONSTRUCTION. PERMANENT GROUND COVER SHALL BE INSTALLED ON ALL DISTURBED AREAS WITHIN 15 WORKING DAYS OR 90 CALENDAR DAYS (WHICHEVER IS SHORTER) FOLLOWING COMPLETION OF CONSTRUCTION OR DEVELOPMENT. f� NORTH BRIDGE CONSTRUCTION SCHEDULE SITE DATA 1. DEVELOPMENT NAME: TRIANGLE QUARRY - RDU EXPANSION 2. WAKE COUNTY P.I.N.s: PORTION OF 0767-32-4317 PORTION OF 0766-80-9143 3. WATERSHED: NEUSE RIVER BASIN 4. DISTURBED AREA 5. FEMA INFORMATION 6. DEVELOPER: DRAWING INDEX 1*41i=1=42611 THE PROPERTY CONTAINS FEMA 100-YR FLOOD PLAIN PER FLOOD INSURANCE RATE MAP 3720076600J, PANEL 0766 EFFECTIVE DATE MAY 2, 2006. WAKE STONE CORPORATION PO BOX 190 KNIGHTDALE NC 27545 PHONE: 919-266-1100 SITE 1 COVER SHEET SITE 2 OVERALL EROSION CONTROL PLAN SITE 3 NOT USED SITE 4 NEW QUARRY EXPANSION - PHASE 1 EROSION CONTROL PLAN SHEET 1 OF 2 SITE 5 NEW QUARRY EXPANSION - PHASE 1 EROSION CONTROL PLAN SHEET 2 OF 2 SITE 6 NEW QUARRY EXPANSION - PHASE 2 EROSION CONTROL PLAN SHEET 1 OF 2 SITE 7 NEW QUARRY EXPANSION - PHASE 2 EROSION CONTROL PLAN SHEET 2 OF 2 SITE 8 EXISTING QUARRY ROAD IMPROVEMENTS SHEET 1 OF 2 SITE 9 EXISTING QUARRY ROAD IMPROVEMENTS SHEET 2 OF 2 SITE 10 DETAILS SITE 11 DETAILS SITE 12 DETAILS 1. FLAG CLEARING LIMITS FOR BRIDGE APPROACHES, END BENTS, AND WING WALLS. 2. CLEAR AND GRUB FLAGGED AREA FOR BRIDGE APPROACHES, END BENTS, AND WING WALLS. 3. INSTALL PERIMETER SILT FENCING/REINFORCED SILT FENCING/SILT FENCE OUTLETS AND TEMPORARY BASINS #3 (AND ASSOCIATED CULVERT AND DIVERSION CHANNELS) AND #7 AS ILLUSTRATED ON THE E&SC PLAN SHEETS. 4. EXCAVATE AREA REQUIRED FOR FOUNDATIONS/FOOTINGS. REMOVE SPOIL TO SUITABLE STORAGE AREAS. 5. INSTALL DRIVEN HP 12 X 53 STEEL PILES TO REFUSAL. 6. INSTALL FORMS FOR PLACEMENT OF CONCRETE FOUNDATIONS/FOOTINGS. 7. PLACE CONCRETE IN FOUNDATIONS. 8. REMOVE CONCRETE FORMS FROM FOUNDATIONS ONCE CURED. 9. INSTALL FORMS FOR PLACEMENT OF CONCRETE IN END BENTS, POUR END BENTS, AND STRIP FORMS ONCE CURED. 10. INSTALL FORMS FOR PLACEMENT OF CONCRETE IN WING WALLS, POUR WING WALLS, AND STRIP FORMS ONCE CURED. 11. BACKFILL APPROACH AREAS BEHIND END BENTS AND WING WALLS. 12. SET PRECAST CONCRETE BEAMS. 13. FORM, POUR, AND STRIP CONCRETE BRIDGE DECK. 14. FORM, POUR, AND STRIP CONCRETE BARRIER RAILS AND MEDIAN BARRIER. 15. FORM, POUR, AND STRIP EAST END AND WEST END APPROACH SLABS. 16. GRADE FINAL APPROACHES TO PROVIDE POSITIVE DRAINAGE TO THE DEPLETED TRIANGLE QUARRY PIT. 17. INSTALL PERMANENT SEEDING/ESTABLISH GROUND COVER ON DISTURBED AREAS. PREVENTION OF SEDIMENT LOSS TO CRABTREE CREEK: TEMPORARY BASIN #3, TEMPORARY BASIN #7, AND ASSOCIATED DIVERSIONS AND CULVERTS WILL BE CONSTRUCTED PRIOR TO BRIDGE CONSTRUCTION. ONCE THE END BENT AND WING WALLS ARE COMPLETE ON THE SOUTH END (EAST SIDE OF CRABTREE CREEK) OF THE BRIDGE, THE APPROACH AREA WILL BE FILLED AND COMPACTED TO FINAL GRADE TO PROVIDE DRAINAGE TO TEMPORARY BASIN #7 DURING THE REMAINDER OF BRIDGE CONSTRUCTION. ONCE THE PERIMETER RETAINING WALL ON EITHER SIDE OF THE BRIDGE IS COMPLETE, THE ENTIRE PERIMETER AREA, INCLUDING THE BRIDGE APPROACH, WILL BE GRADED TO PROVIDE POSITIVE DRAINAGE TO THE EXISTING QUARRY PIT. ONCE THE END BENT AND WING WALLS ON THE WEST SIDE OF CRABTREE CREEK ARE COMPLETED, THE APPROACH AREA BETWEEN THE WING WALLS WILL BE FILLED AND COMPACTED WITH A -0.5% GRADE FROM THE END BENT BACK TO TEMPORARY BASIN #3 FOR THE FOR THE REMAINDER OF BRIDGE CONSTRUCTION. ONCE THE BRIDGE DECK AND BARRIER RAILS ARE COMPLETED, THE APPROACH AREA ON THE NORTH END (WEST SIDE OF CRABTREE CREEK) OF THE BRIDGE WILL BE BROUGHT TO FINAL GRADE TO PROVIDE POSITIVE DRAINAGE ACROSS THE BRIDGE TO THE EXISTING QUARRY PIT. HOWEVER, ALL AREAS NORTH OF THE WING WALLS WILL BE GRADED TO PROVIDE POSITIVE DRAINAGE TO TEMPORARY BASIN #3 UNTIL SUCH TIME AS PIT DEVELOPMENT IN THE EXPANSION AREA ALLOWS FOR CAPTURE, TREATMENT, AND DISCHARGE TO THE EXISTING PIT. PERMANENT GROUND STABILIZATION TIMELINE Table 3: Required Ground Stabilization Timeframes Stabilize within, Site Area this many calendar Timefranie Variations Description days after ceasing land disturbance (a) Perimeter dikes, 7 swales, ditches, and perimeter slopes .................... 7 (b) High Quality Water (HQW) Zones 7 (c) Slopes steeper than 3A None None ■ if slopes are 10'or less in length and are not steeper than 2:1, 14 days are allowed 7 days for slopes greater than SO'in length and vvi Lh slopes steepE`r than 4:1 14 ■ 7 days fir perimeter dikes, swates, ditches, (d) Slopes 3,1 to 4:1 perimeter slopes, and HQVV Zones ■ 10 days for the Falls Lake Watershed ■ 7 days far perimeter dikes, swal es, ditches, 14 perimeter slopes, and HQW Zones (e) Areas with slopes ■ 10 days For the Falls Lake Watershed unless flatter than 4:1 there is zero slope. AFTER THE PERMANENT CESSATION OF CONSTRUCTION ACTIVITIES ANY AREAS WITH TEMPORARY GROUND STABILIZATION SHALL BE CONVERTED TO PERMANENT GROUND STABILIZATION AS SOON AS PRACTICABLE BUT IN NO CASE LONGER THAN 90 CALENDAR DAYS AFTER THE LAST LAND DISTURBING ACTIVITY. TEMPORARY GROUND STABILIZATION SHALL BE MAINTAINED IN A MANNER TO RENDER THE SURFACE STABLE AGAINST ACCELERATED EROSION UNTIL PERMANENT GROUND STABILIZATION IS ACHIEVED PIEDMONT LAND DESIGN, LLP 8522-204 SIX FORKS ROAD RALEIGH, NORTH CAROLINA 27615 919.845.7600 PHONE 919.845.7703 FAX ENGR. FIRM LICENSE #F-0843 a z � J �Z YU a 0 W I C1 Z UW < >- Z .ja. a V% � Zw w� M �o °a H � o oc ISSUED: 16 MAR 2020 REVISIONS: 10 30 SEP 2020 PER NCDEQ COMMENTS DRAWN BY: MILS CHECKED BY: MILS PROJECT: WSRDUQ COVER C, DWG. NO. SITE 1 - - I - - - - . . I � . . . . . . - . . - - I . - - - . -- . . . . . . - - . . � - - - . . . . � .. .... - - - - - - - .. . . .... . I . - . 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THE DISTURBED AREA BETWEEN THE PRIMARY EROSION AND -- , , __ - ,,, " I ;--- ,-, ,�;,�,, /� �_ \K I ,_�\ 101\1\1111 �/�_:�' �:� -,-��,-;�--_, / \ "" \ I P/ � I , :_!_1_1� - I � ///' 1_' I _��, ��_ I, I, I �',, \ SEDIMENTATION CONTROL MEASURES AND THE DIVERSION DITCH , I Ssan"mv, � - I/ __-) I I / I I I \\� \\ - ", \ - �� - __ ) . /(/�,,�//, . - f \,\� - I I / '11�z �11*1 ii$\ Y ) ��, \ � \ ,_ I ,,M�,, �Mll D MULCHED IMMEDIATELY. , ,_ / ::��;�,��_ I - , (I \/1 I � � It � "t KA 2. UPON CONSTRUCTION OF ALL BASINS, IMMEDIATELY STABILIZE ALL \,� , l I I I Ili ( I I , I �,�a , � - � �, , _�_�Z��, / I \_�-) / 2�-�:�,�� , \ / it \, I I 111,1111i , p \�,",�--, - 1� \\A�l I, " �-� , � , _,e - , "' SIDE SLOPES WITH SEED AND MAT SIDE. \ � N- /I - -1. ( 7�_ 1) I \11�:�) �� ,,, --- --\ 'i ( Ill / ) ))) \p __\ /I \ / ,\m� t,4, / , ,t\&,� ,_ -, � __ , ----- , , I r-, /�/g , ',',z',,,, I / / / � ,� I 11 1 3. SEE CHART ON DETAIL SHEET FOR TEMPORARY DIVERSION DITCH I K - __ - - �. 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HATCH // / / --v \VAA� \% LINER AS N❑TED ON PLAN \ I V A � A A 1 I I I I 1 / / � � A /l co 1 V AINDICATES AREA THAT WILL / / / _ - V AA 1 i \ \ \ I \ I \ � \ NOT BE CLEARED - / / / / -\ \ \ �w I A v /-V \ I I 1 v / A / � FO 1 I / ) / // --v v vv \ SF _ SILT FENCE I I\ AV A \ A A j // II II II III / /� I) // / v_-v vv\ / \ II�� I I /� A\ /� �`�� O / // / BEUMPS GRNDEIDLANDMUIN OR SED AS� /// //�/// \\\V A� SILT FENCE OUTLET II / ) I I I I I / / I I / \ \ V vv I (/ / '*�l o, \ I � <, O // f /// // / // I I I 1 ( \ �\ \ / \\I / I \I\ )/ \ I I O F�� / / MULCH FOR GROUND / . - \ / I vv � 1 / v h / / / / / / / I I I III I 1 / I \ \\ I I `" , / � / / \ 1 �0� I CD /// / / OVER. / I I I / A ,6 v vv / v / `L C''J / / / / / / // / / / / CHECK DAM 1 / � \I / / / /vv l \ I III I 1 / / / �` �'V v � � � X vv \v �v �� // 1 � I I �I I //// / // �// // /// � �/ / // /// //� / / / v A 1 I IIII I\ I\ 1 I I vvv v� // I I \ I I I� // / / / /// /// // //// (\ / �/ /// / / / / 1 \ \ — \ \ \� / I / / / / \ / / W��]NEUSE RIVER BUFFER Z❑NE 1 \ I I 1 I \ \ I / / / / EROSION CONTROL NOTES: , ^ , \ \ I \ \ I \ \ � ; I / / / / / // / / / \ / / / / / / \ \ ♦ / / 1 I \ \ \ \\ I \ \ \ \ \\\ \ \\ r / / 1 I I //// / // /// // /// / \ - // // / /// 1. THE DISTURBED AREA BETWEEN THE PRIMARY EROSION AND / / \ 1 I I I I \ \ \ - \ \ m\ \ I I / I / / / / / // / / / //- ) // / / / NEUSE RIVER BUFFER Z❑NE 2 \ \III 1 I I \ \ -- - Q' \ \ / / / SEDIMENTATION CONTROL MEASURES AND THE DIVERSION DITCH / / I 1 \ \ -\ -\ 40\ \ 1 \ \�-/ I / / I / / / / // / / / / / / // / / ////// / / / A �' �' I I I 1 V �v v `� v\ v - - I / / / / / / / / // / / / SHALL BE SEEDED AND MULCHED IMMEDIATELY. / \ \ \ \ \ \ \ \ \ - / I / / / / / / / I / _1 I I I I I I) / / \ \ \ v v v v vv vvv �-- v I _ I I / // / / / / // // / / / / / / / / / / / // / / 2. UPON CONSTRUCTION OF ALL BASINS, IMMEDIATELY STABILIZE ALL / / I I I \ \ \ \ \ \ \ \ - - \ I I C� / / / / PROPOSED SECURITY FENCING, / I I I I 1 \ \ \ ----- \ \ \ / \ \ \ - \J / / / / / / / / // / / / / / / / / / / / / / / SIDE SLOPES WITH SEED AND MAT SIDE. / / I I III 1 \ \ \ \ \ \ \ \ \ \\ -\ \\ \ �� \\ \\ I I O X / / / / / / // / / // // //// // / / / / / /// ///// HATCH INDICATES AREA THAT 3. SEE CHART ON DETAIL SHEET FOR TEMPORARY DIVERSION DITCH , ( I \ \ \ \ \\ \ \ \ \ \ \ \ \ \- \ \ \ \ \ < \ - \ \ ) / / / // NORTH 4. SEE CHART ON DETAIL SHEET FOR ENERGY DISSIPATER \ \ \ \ \ \ - - _ c / / / / / / / / / / / / / / / / / / / WILL NOT BE CLEARED MINIMUM DIMENSIONS AND LINER REQUIREMENTS. I \ \ \\\\ \ \ \\ \\ \ \\ \ \\\ -- \ \ � \ \ \\ \\ \\\\ � -- - /' � / , / / / / / / / // / / / / / ( / �///// / / / STUMPS WILL REMAIN ❑R BE (\ \ \ \ \ \ \ \--- - - \ - DIMENSIONS AND REQUIREMENTS. A A \ \ \ \ V A V v - 1 v \ v v - / / / / / / // // // / / / / / // / / / GRINDED AND USED AS MULCH / ) \ \ \ \ \ \ \ \ \�/- \ \ \ \ / \ \ \ -- / / / / / / / / / / / / 5. SEE CHART ON DETAIL SHEET FOR SEDIMENT BASIN DIMENSIONS / \ \ \ \ \ \ \ \ \ \ \ \ \ - / / / / / / / / / / / / / // 0 60 120 180 FOR GROUND COVER. I \ \ \ \ - \ - / / / / / / // / \ \ \ \ V v v v v V A / / / / / / // / / / / / / / / / / // / AND DESIGN DATA. < \ \ \ \ \\ \ I I 1 \ \ \ \ \ \\ \ \ \\\ \ \ �� /' / // / / / / // // / / / / / / / / / / / vvA V V\\III I I I ( \ A \ v � v - /�v - vv vv v- vvA v / // / / // / // / / / / / / / / \ \ \III Il \ \ \ \\ \ \\ " - / _ - \\"I\ \ - \ \--/ / // / ///� //// / / / / / // / // /// SCALE IN FEET 1 "=60' RBANRAIIEKN1..1.1 8522-204 SIX FORKS ROAD RALEIGH, NORTH CAROLINA 27615 919.845.7600 PHONE 919.845.7703 FAX ENGR. FIRM LICENSE #F-0843 Q Z o.j } QO w O w w Q Z YU QO W= D� III �_ cf w w Z UO WQ >.Z ..j(L o CD X Lu = Z W w CD < =) w M of w 0 J Q 11",mlx Ow I SSU ED: 16 MAR 2020 REV I SI ON S: 1� 30 SEP 2020 PER NCDEQ COMMENTS DRAWN BY: MLS CHECKED BY: MILS, PROJECT: WSRDUQ NEW QUARRY EXPANSION PHASE 1 EROSION CONTROL PLAN 10172 DWG. NO. 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" / / / / / ( \i / / / 1 / // / III V v vv v ` vv v\\ \\\ �wvvvvv \ v A\vvv v� vv 1 �Av �i /�� - / - / / A� \ \ 1 l \ \ \ /// �v - __ o ,_--_ TEMPORARY DIVERSION DITCH / --�/ // / �/ / / / /// / I I I A A VAV A \\ VAA v�VA\V�A\�A ^� yvA\\AAA A\� A`�� VA / /// — — / / / / / / - -- I \ V A \\ov vv vv vv v A \\ V \ i�//// --_ _ , �/ - 3. SEE CHART ON DETAIL SHEET FOR TEMPORARY DIVERSION DITCH / / '� / / / ' STREAM 6 / \ _ -' \VAV A V A\ VVA V\ \`AV �� \�\V A /� \� v �A �A //v i� %// - � _ � _ — //� / / / / / I / / // / \ \ \\ \ \VA �A A\ V AV\� A \ / - __ �� /ice --- i /-- /� / / / 1 \ VA \v \ \ \ \V A\ \_ Av v VA \\ \/�/ // — v v —v--- _ _ _ / / / V I I / / 1 / V A�\ \ vv \ \ A ) \\\\ v_� v VA O// / - > > y��-- ate` -� --� /��i� --- i MINIMUM DIMENSIONS AND LINER REQUIREMENTS. "I 11/ / /// j / / / / / I / / /� / / \ \\ \- \ \��\ 1\� 1\\\\ \� \ I \ \\\\ \\ 1 \\\ \ \\ \ j��i///// ��=_- � __ = - ///'-/�-� 4. 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- / // �/ / \\ \\ \ \ / / / I /r - --- A I I / / / / /' /- / / / F -- - - �� / /� / v A STA B R I / v\ \\III - � _- � i RAP ENERGY DISSIPATER I i / I ------ \ \ / / / / / / L G / / / / - - \ 1 I I / / / / / // / // / �`� s / _—� // - - _ /,'___--�' �� I AT BASIN ENTRANCE �� s� \\ 1 - 100' UNEXCAVATED -\--\ I / / / / / �� F \ / - I \ / / _ _ \\ 15'Lx4'Wx18" THICK 1 1 I / ,( / / /ENE GY DIS PAT€R cs --- \� �_ / /// // �'��''' - - I I \ ( ) / /1 / ,-1 BUFFER - -- \�\ I / / / / / CLASS B RIP -RAP �' F �- - // / - ` / ' --- - \ / / / / / ! / c- �� -- - \ \_ / � / / ---- o I I / / / / / / / 1 - --- ---- \ / / / // // / �4L x tW)c 18 TF{ICK// / T2 �?—� \\ / /7////,// / //� �� - X / I / / / / / / c� // I / 25' UNDISTURBED - \ / / / / / / / / �G / \ \ \\\� \ \ \ \ \ / /// /EN RE GY DISSIPATER _----- -- / 1 / / / / / / �ri 1 / - ---BUFFER \\ \ I / / / / // / WEIR LOCA�ION \ / /_--- .�\\ -\ �\ \ \ \ \ �' / / � -_-- \ I / / / / / / \ / �-�__ - � \ I� ) I / / // // /'� / / i I / l / // --\ � \y\ // / "ICLASS B RIP -RAP �_�-,--------- - \ ( I I / / / / / / o -- \ I \ / / / 1.5"O SKIMMER / / / / /--- \ \ // // / /4'L x 4W x,18"TICK _--_ \ / / / 1 - -- -- ` I vv I l // / I / 11 �/ /W, 1.0"0 0 IFICE / 5 //�/ ---- - vvv v v v A \ /// / // / /// WAR LOC�ATION�- -_ ------ vv A \\ j // / // / / w -I - I / / / - v v v v - / - - / / / - 11 I --- �- \I \ I /J // / I/ /-/ / // /'� � / G�91� BAF S / � Fo /I / / \ v v / / /� i / / --- V A I / / / / / _ - I / / / / / / i 5� /-- -\ \\ \ \ \ / / // -- \ / / / / / - v / / / v - v I / / / / '� -� - - v I 1 / / / / / (-- // //15" SLOPE DRAIN. � / / � � ,--- ///// �/ ` vv vv` `\ 11 l / i1.5"fb SKIMMER �� v \ 1 / / / // / / / / � - - \ / -1 —� \ \ I / / / / - 1 --_ v v \ \ / / I // / / / \. / / / / / \ v\ V A / / I / /� 0.8" ORIFICE /--- ---v I / / / // / // / / // �I �'� -LIMITS a� v A ( I / / � � I NSTALL CLASS B RIP RAP / / / �/ / � ��-�`' / / / � v V v_ V / / / / / /� � / // � v A V A I / / ��%� - I DISTURBAN�- \ \ I I I� ENERGY DISSIPATER AT - / / /-� v A� 15 SLOPE DRAIN. v A \ / -.-- __ - - v v A I I D/IVER�ION ( DITC �A. / / / / / / / / A \ I / / / / / / / - I I I ll \ v SLOPE DRAIN OUTLET (PER / / / /� - / / / / A V v \ \ � I / / / INSTALL CLASS B RIP RAP ENERGY - - v \ I / / / / / / / �/ \ \ \ �1 I \ \ \ \ J \ \ \ ` / - / / / / / / \ \ \ \ \ \ \ \ I I I ( / / / / / DISSIPATER AT SLOPE DRAIN OUTLET - ` \ \ I � / / / / / ( / / /� , / V ) I A \ v \ V A v - V CHART ON DETAIL SHEET) _�/- _--- / / v v A \ I I / \ �1 / / / / / //, ----f- ----v \V A 11 / I I A A\ vv `V A V , v vv / I / IL /'� "' � ��--' _ / // // '---- vv \ \V A 1 1 \ � I // � / / (PER CHART ON DETAIL SHEET) vvA / 1 / / // // /I \ I \ \ \ \ \ \ I / DIVERSION- DITCH 1A. \ \ \ \ 1 / I I / / / / / \ / // //� 4F � ------ v� \( / l I \ V \ I ( /INSTALL ASSS B RIP --- -'�/ /--- // / v\ \ 1� I I / / v / / / / 1 vv v v v �/ v v Av v vv - -v vv v v -- - _ --- vv v vvv / I I I / / / - v / / / c - v V A \ 1 COIR BAFFLES v A / / / / / / / \ I RAP ENERGY DISSIPATER / �--_ \ \ V A V A v v A \ I AT BASIN ENTRANCE _ _ / __ v A \ \ V / I I I I I 1 / / / / -- / / / / / / / I ---�------ _ -v\ \ \ V A V A V A 1 V v � � I I I 15'Lx4'Wx18" THICK -_- � ----' �---- --� , A \ \ \ \\ \\\ / 1 I I I I 1 I I I / / / /� /I - - /, �v ` I I / / / / / / / I / - I' _\ \ \ v ` v \V A j I I /l / I I I /I v ;'' -' --- �// v `\ \� A \ V A AI\I III / I I I I I 1 �/ -_ AV / // // / / / // -_/ \ I I I I I RRR / v V // / I - - - ---} \ \\ \ \ \ / - `, \\ \I I I I //// // /l I I l /I /I ///% -- _ _--- — - � -- _- __-- y v / / / / �,-' - v v v v AI `v \\ 11 / I I / / // / / / / / I / / _ _------- `� ►-- \ - / I �� v `\ \\ \\ / --v _ A I // I / / / � j/ / // / I // / / -- TEMPORARY BASIN #6 SDO-10 t� \ / / / / / / / / / / / / / /' BOTTOM ELEV=276 �� PROPOSE SEC�JRIT�( E CING. / / / / / / / / / , - > HATCH INDICATES AREA THAT WILL / // / / / / / // / / / / / I/ // / _ SPILLWAY=10 LONG ® ELEV=278.0 V A V 1 1 \ \\� 1 / / I 1 IV/ SI N QITCH 1 B \ V / / / / vI v IIIv vy`� i / I I Ill/i i i j/ 9 / / /, v v v / l / l // / / / '/ �� / 1 - I\ I I I \1\V A I // 1 // STALL CLASS B RIP vV I I I I I I / l 1 1 / / / /� / i//; 1 / I A A / / / / RAP ENERGY DISSIPATER I I I / / / / / / / //� i I// I I V A l / 1 / / / / / // / / / AT BASIN ENTRANCE / / / / / / / I I 1 / / // / / / 15'Lx4'Wx18" THICK \� I I I I I / / / / / / / � , / -- /%/iii/ / / / I / / / I I ( ) �� / / /// _ / / / J/ / / / / / / _ _ / BERM=280.0 _ - 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rF - - - I l / / / / / / J / / // / / / / / / / / / / SPILLWAY=85' LONG ® ELEV 270.0 / / / / / / / / I ' / / / / / / // / /// / / \ / / / / // / // / / - \ \\ \ \\ \ --/// / / / � / / / / / �/ / / / / / / / - - v v v v / / / -- --- - - �v A / / �'/// / -/ /, // / / / / / / BERM=272.0 1 / / / / / / / / / (�c�'/ // // i / / / / / / / / -----_ v - vv v -- / / v / l _/ / / // �/// / / / I l II I/ 11 -- \ \ \ \\ ' / ------ \ \ I / / / / / / / / / / / / / / / / / / _ - - - - _ - \ - \ \ \ \ \ \ - / / / / - - \ / / / / / / / 36' CMP RISER - CREST ELEV=269.0 / / / / / I I F1ENC)r / / / -- \\ \ - \- ��// / , - --- \ \ \ END DIVERSION DITCH 1A, / / / _ -- i // ///// / / / / / 60 LFf 36" CMP OUTLET BARRELL: / / / / / / I50' I I T II 11 11 /lll ( , / / / / - -----' - --� v v - v / / -- v A / / // / / / /T / / / / III 11 11/ //l /// /// - v - v / / / / / / / N SE I I I / / - - - \ - \ \ - / / / START DIVERSION DITCH 1 B �� - / / / / / // / / / / / INV IN=263.2 / / / / / V R I / / III - - - - \ \ - - / / / / / / I 1 III 11 Il l 1 /l I l / l / l / -- -� �� - - v / / / -- -v A �- - /�// / / / / // / / / INV OUT=262.0 / / I l l/ 11 11 / ( -- - - - - \\\ \ / _-------- \� I I _ // / / / / B F ER I I 11 11 I l l � I I v, / -- -v '------ - -v '-- v� v v v v-,/ / / ---- vv A \ V 'I I 'I ' v�/- ��- / /� // / Z/ / /DESIGN STORM=25 YR / / / / / / I I I /1 I /I / ll/ N/1 _ _ _ - / / / / / III 1 �\ v __ vv -- __--'---1- v v \ v v� // ---- - '-v ` v A \ v\ v A VA \ - � // / / /- / / / / / / 1 / / I I / II II,II I III IIII I v - - v \� _ // / / / / / v / / / / / / / / / 1 I 1 I 1 I I �� / I III III III III III I v v - �v v -- v v A A / - _-_ v v V A DIVERSION DITCH B _-- // / // / / / / v � / I I / I I I � I I I I III, I I v _ - - �v \ v _ -v v v \ _/ - / / / / I / / I I , m I II II II I v - - v /--- / / / x / I II II , \ - ----_--__ \ \ / ,------ \ \ \ I I 1 \ / / / / / r - / \ WEI'R LOCATION I II \ I I v �' - -\ --- \V A A \ V A \ // / / _ - A\ ` \ \ 1 I \ \ // �- ,- / / / / / \ � I I I / / / / I I 1 1 / / III II III 1111 IIII IIII 11 /VERSION DITCH - 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vv --- - --- --- - v A 1\ I / / / / V I I I I I I / / of l/ j11 I I / I I --- v v- -v `v v vv v v / / I I I I I I I I I 1 I / I l l IIII lI II I I _ -- v -- ---- --v `v v v_ v vv \ �- -- -- - -- -v `v \ -' /� // // / / // // �� I I I I I / // / // 11 1 1 II j I j III 11 \ - \ \ \ \ \_�--- _ - - - -\ \ \ \ _ / / / / '� 1 I I I I I I I I / / / �/ I // / / I 11 II II Ili III ,- \� / / // / / I I / / / / / / I I I I I li v ---- v----v��_�� v v `v v A _---- v \ \\ \ / / / / / / / 1 I I I I I I 1 I / / / / I I / // // I I 1 III IIII 111 I _ - \ \ \ \-_--- \ \ \ / / � I � I I I I / / / / / / II I / _ 1 / 0 '-v- '-v _-------v_ vv v vv v � --v vv v vv v v v vv v v v �� ----v I // / / // 0 X I I I I / / / / / I / / I l l 111 I I I I 1 I - v \ �� _ v v \ \ V A \ \ \ v / M II II II / / // / / / I / l l I I l / I I 1 III III I I I / I -v v - v V A ----- - v V A / _ v / / r I I / / / / / I / I l /11 I I III II I I / \ \ _ _---- ` \ \ \ \`--�/ ,_ _- __ \\ \ \ \ \ \ \ \ \ \ \ \-� /� -_- -\ J J / / / � / / RISER/OUTLET I I / / / / / / � 1 �I / / I/ / j11 III 1 IIII IIII / I / \ \ \\ \\\ \ \\ \---------- \ \ \\ \ \\ \\ \\ 1 \\ \\ \\ // / ,----\ `-/I / / / / - 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THE DISTURBED AREA BETWEEN THE PRIMARY EROSION AND I \ 1 I / - I ` / / - - _ / A )I I\\ V A\VA \ \l 11 11\ \ 1 / VAV v� _ - ;� - / 1 / � 1 I I /// / / / J / / / / I / \ I \ \ \\ o IV \\\ \\ 1 \11 \1 \ \ \ \\ (i - - \- / / �� \ / I \ \ V A\ V A\\ \I - \\\VA VA v / 1I A AVA \ v v� - / ISEDIMENTATION CONTROL MEASURES AND THE DIVERSION DITCH / / / I /\ /) / // / / / f / _// )T s� \ I A \ vv n\VAA V AVl A\\ \\ vv Al V A\\ A - \\ \\ \ \ \\ \ / _ 1 SHALL BE SEEDED AND MULCHED IMMEDIATELY. i / / lI / / / / / / \ \ \ \ \ \ \ \\ 1 �\\\ \` \ \"`\ \ \� \ \ \\ �\ \\ \ \��\\ \ l i/ - - _ - 2. UPON CONSTRUCTION OF ALL BASINS, IMMEDIATELY STABILIZE ALL / 1 // / / I / ,� I / ".'T 1 o \ \\ \ I \\ \\\ \\\\\\\\ \� \ \ \ \\\ \\\ \ I \\" \ \ \ J / / / / / Z�/ i / / / / // � \\ \ \ \ \\ \\ \ \\\\ \\� \ \\ \ \\ I \` \ 1\\\ Dig/i�i - �\ -�, _ / / 1 / / / / / / / A _ vv A \\V A\ vvAV A v \ VA\vv \ l v� Vv \ \ v ///j w� o i ,- - _ - SIDE SLOPES WITH SEED AND MAT SIDE. - - I \ A \ \VAV A V \ vvvv \\ \ VA \ \\ % ////// v -- �- _ / / / V A \\l VA\ ovvv AV\\ =_ - _ / - , / / / / / / / / I I V A vA v A \\ vvv vv vv vvv v L \ v \ - �� - _- - _-_ - - - %� _ - - -- - 3. SEE CHART ON DETAIL SHEET FOR TEMPORARY DIVERSION DITCH / / / / / / i /---V / / / / I I \ V A \ \A \V AA \ \ \VA v - AA \ %�/////// ��-- �_--- i/�----�r- / �/ / / / / / / / I / \ VA \ \V VA V AVA�V v� V A\ — STREAM 6, v I / // / v V A vvvvv. \\\ V Avv v \ / _ - �� - - --- / / / / v v A\\V v /� v� ��/�///- v ��'��- ��---/�/_=_=_-- �/ MINIMUM DIMENSIONS AND LINER REQUIREMENTS. _ _ _ \\ i / // / / / I / / // / / \ \\ \- \\� �\ 11 I\\\\ \\ I \ \\ \ \l \//iii�/ /------ \ --- s _---� �// % 4. SEE CHART ON DETAIL SHEET FOR ENERGY DISSIPATER / / / / \ \ \ l 1 \"\` \"`\ `\\\ \ '��/// / / - \ - / - //� \ DIMENSIONS AND REQUIREMENTS. / _ / / / / / -STREAM 1 I / / / / /i \' I , \ \ \ \ \ \ \\\\ \11\ \\ \\\ \\\\\ \ \� \\ //ice// /i , --- ,I / I v v v v vv l vv vvv vvv vvvv v vvv V I v vvv vv >� /i //� / - =� - - 5. 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'__.-� / F - \\ \\ \ 11\ \\\ \\ V \ - / / / / - ' / DISSIPATER PATER�AT SLOPE DRAIN OUTLET \ \ \ \ \\ \ \ / / / / I / \ I \ \\ \\ \ \ \ _ _ / / / / I/ - / �/ / � \ \ \ \ \ \ \ SEE SHEETS 8 - 9 / / \ \ / - - \ V A \ \ \ \\ �i / 1� l / �/ - v A \ \ V A \ / / / _ / / V �v vv V A V \ \ -� \ J ( / �/ A \ �y --v / / // PER CHART ON DETAIL SHEET \ \ \ �� // \ \ - * \\ / / / L4q F FR \ \ \ \\ \ %// / I / / / // 15" SLOPE DRAIN. / \ DIVERSION DITCH �/ \ \ \ ` \ \ I l / / / / / �l I _-- / / / \ /TC S/O \ \ � /* / / - N \ \ \ \ / / / INSTALL CLASS B RIP RAP ENERGY V A \ V A� 1 // �� // v - / 1g V v A \ - - /� / / 50' BUFFER FROM / A \ v V / \/ Q. i v A / i DISSIPATER AT SLOPE DRAIN OUTLET \ \ \ \ \ � � / / / / �_ - \ \ / POND WETLAND j �/ , �� PER CHART ON DETAIL SHEET \ \ \ \ \ \ 13 R - - \ /_ i / /' / / / �/ 2�2+ - \ \ \ \� 1 / \ \ \ V A \ N �/ / l \ A v A / FRINGE , �� // i�-� - // - �v AI \ v Av A\\ \ �V AA \ \ % \V - � /� V � /�/ // / // � vv v v vvv v \ `1\ 100 y � i I -In — __ - / - - - / / - -TEMPORARY BASIN 3 SDO-2) \_ v ` v V A \ \ \ \ v -- - _ / - - - v \ v v v v - - G = //�� / �� \ vPROPOSED BRIDGE \ V A V A \ � _ / �� / � / v v - � A -- i : /%/ BOTTOM ELEV=264.0 \ V A A V A \ �c, �� - // �� /j/ vv v v v v v A v� ---/ - - - , / - - - - - _ / ` BYFOT ER PLANS \ ----_ � 1 /��' SPILLWAY=13' LONG @ ELEV=266.0 -- / / \ \ \ -_' --/ _ v vv H S v vvv v v v�, v\ I - / I/ /® -----_ v �v / BERM 268 0 \ ti / / / \ \ \ \ \ \ _ �Q / - / --- /-- v v A \ \ V Q2 04 \ r 0 *# g�,, / / / / \ \ \ `\ I i / / / _ - - DESIGN STORM=I YR \ - V A \ V A A \ F 0 I- v w / / / / / / V A v v v V`'f v � / v v \ \ v F. I I o _ I"� / i/ /-_ --- V A \ \ // / ------ \ \ \ / �� !� - / - - _ \ -DIVERSION SWALE TO \ \ \ \ \ ,%� - ' / / \, ` \ \ // _ ---�- - / __------/ \ \ - BE PIPED WHEN \ \ \ 4 � / \ ��`/ � / �/ / \ \ \ \ \ \\ \\ _, ,- / / /' V A BRIDGE IS INSTALLED A V A \ / / ---- A \ v v \ \ �� ;� - - / / v \ / \ v V A V A\ ////---- / / // DIGERSIO�ICH 6B- v A vv \ v v v v \ V AN _ / / v v V A v \� \ ----_// /i - - ------ - _ - // /-------- \ \ \ \ vv A A A \ V A V - / / / / / v A V A v \ \ \ \ �� A _ �/ - -----v A v A \ V A / \ A \ V A �1' \ w \\\ --- /// // , , I ----- ----- � ----- \ \ \ \ \ `\ \ \ \ I `\ // / I �, /// \ \, / , \ \ \\ \\ \ \ \ \ \\\\ -/�// / �_f ___---' __ v � V A V \ V A I I � _ i / � // / - A \ v v vv \ \\\\ _ __---------- - ---- ` v I I I / / / �/ ', / // / \ \ \ op - / vv \ ` \ _- ///// _____ END- -- -- -- -- v v v I v I I / / / �� // /� / / /�/ / \\ \\ \ II 1 vv / / / - vv vv \v A V A //' --DIVERSION DITCH 6A ----_ \\ �\ \ I � / STREAM 2 / / / _ ► - -. _ / / I \ / - / \ ' \ / / \ v v A \ \ / - / / LINE DIVERSION WITH RIP RAP v V I / / / / / /� - /// 00 - / / A I v x____ / 1 v A / / / / i - � // j� _ _ / / /' / / / _ A \ V A \ / J-- -GREEN C350 PERMANENT LINER I I \I / // / START DIVERSION // // / /� oo - // /////// /// / vv v vv vv \\ `V A\ DIVERSION \ I /-- d50=12" OR NORTH AMERICAN \ /I / / / / / v // / / v END / \ / / DITCH 1 B I 1 / --- \ \ / / / __ / -�OR APPROVED EQUAL) -_-- \ I / / /DITCH 1A / / O . _ --- / / _�/ / / / / / \ \ \ \ / / /� -- A I l / / / / / / __ / _I / // / /// // / A \ V A \ V A I l \\ \ / / I l / / // / LFG : / y i / _¢_ I - _ 100' UNEXCAVATED \\ \ I / / / / / / / / / / Q I - -\ \\ �� / / /'//� / \ \ \ / / 1 / - - I / / / / / / / - / I INSTALL CLASS B RIP / / / _ / BUFFER - \ \ I / / / / / �- \ - / / / / / / RAP ENERGY DISSIPATER ` // / / / / v I / / / / / / / / �, / / / 1 / / / / / , v / / // ! � / / / / / / — / — I / / / / / / / i G Z / v / / / �� -vvv vV / / // / / / / / ( / / / / / / / nG v� A // / / / / �// AT BASIN ENTRANCE / / / / I / 25' UNDISTURBED I / / / I / / - - G , v v v \ / / \ \ ) / / / / / / \ \ \ \ / \\ \\ \ \ \ \ / / j' ------ -- (15'Lx4'Wx18" THICK) ) / ----' 1 -- -BUFFER vv / / / / // / / \ 1 / / �`� / // / - �v v v v A / / HERSVONE N vv / / / / / ---- -� l / / / // /' / / / \ / I / l / / // // / .� \ \y\ // // / D\ 18---------- \ I / / / I V v / / / / / / _ / / / / ------ -v / / - / / / / I //- / / / D - \ / / / o \ \ \ / / / / / / / / / / / / / / / / \TCH z�2 / / / _� ----_ I v / / / / ;�� / / / / / -- - vv v A \ / / / / --- A / / / l / / / / /� - v \ \ \ \ / / / +2 5 / / So v v v v / / ---v -vv � I \ / / / / /- / / // / / / / // / ---DIVERSION bITCH�IA vv vv, \ \ V I / / // 2/ - -_--- vv \\ \j / / / / / // / // // / 4 _ _ vvv I v I / / / / // / // / //// / / / / / / — /� - v N \ v,� / / +2�3 - / / / / / / / / / / / / / 1 / / / �- / / _ - / �/ / / / �, A go -� vv A V A I / / / / �/ A --/ - - - vv vv A A / / / I / / //- // // / / / 0 _� / / r / / / / / / / / / / / / / v I I // / �/ / / / _/ / / / A \ / / / / v V I I l l / �v I / / / / / /-- � -- vvvv vvv `\ I I I I ! A I \\ v Ay/--y///�////'� //' ////��v \ /l/// / /l / l / v \ 1 \ \ \ �,\ \ v v v / / / / / / V I I I I --- v \ \ , / / / / ,___A[-v v / I A \ v \ v A v v V A � - _/ / / / I I I I - / / / / / / � \V A 1 ( I I A A\ vv \ \ V v v / / / /i /-- - //.. - - V IIII / / I IIII / 310 `v \ / / / / / / / / A I I I \ \ v v v v vv v 1 / / / \ / - - \ V 1 1 I I I I I/ / I I I I I / / / / / / v A \ I 1 / / / / // / / // /� / /, v\ v 1 / I I \ v � A \ V I / / / 1) _----//' / \ 111 I I I l / / / v 1 I / / / / w 10 — o A \ V (/ V A V A\ v —\ A A \ V A I I / / // ---_ — — / / 300 \ \ V A A I / I I I I I I / / / // /—__ V% / / / / v / / --- v v V A \ V A \ \ -v v \ A 1 I / //� -- �/ v \ V A A \\ \\\ / I IIII III I l / / / v v / // / / / / / / / �� I \ \ \ \ \ \ \ \ 1 \ \ I I I /�%^-_-`� _ - _ - -\ \ ` \ \ \ \ \\ / III IIII I / / / / \ / / ® / / l v v A \ 1 I 1 l \ \ V A 0 IIII // I I I I I 11 / // ` I I // // // / /� �- -� \ \ ` V 1 v \ V I I I \ I / I / I 1 -/ �- _ --- / END DIVERSION DITCH 1A, \ \ I I I I / / / // / / / / I V / /� V ` \ v A V I / / / / I / I I / --' - 1 V A 1 I I I1 \\� 1 / III I I I I I / / / / / / �,� / / -/ / /// - V A \ \ " V A I l / / / l I l III / ----- - START DIVERSION DITCH 1B I \\ I I I I / 1 / / / // --- \ / / / / / / / / / I / // //1 v V A \ V A I / / / / / / / I / _ -- I `\ 1 I VAJ 1 I l l /l /l // // � \ / / l / / / / - / / �, M \v -v 1 I // //// ---- —, V \ 11 I 11\ I I I / / I I / � A I - / /� / v v I I / / / / 1 I \ I II ( l II / \ l / / / O v v A v V 1 / / / / I - / / / I / / / / v v/ / / / / - / - I I I I I // 1 I I / / / / / / / / / �' / /, / / v v v v �Ic \1 II / j / / -� / /---' _---'/// I / / / / / / / // / // / �� / / / / // �� , / / 1/ \ \ \ \ \ / I / / I I // I I I I I I\\ 1 / // / / // // 1 / / / //� v \ / / / 1 - �� I I 1 V 1 )/ I/ / / // // /// / / / / / / / / / j // — / / \ > / / / / / / ✓ / J l I l \� / l //// / PROPOSE SEC�JRIT�()1EI G. / / / / / / / / / / / / / / / _ _ / / / / _ / / / I / / / / / / / / I / �\ / / / / / / //// / / / HATCH INDICATES AREA THAT WILL / // / //// / / // / / / / / / // // /// // / / / / // // 11 % l l / I I I / / / / / / / // // i //i///// //, / / I NOT BE CLEARED - STUMPS WILL / / / / \ / / / I / / / \ / // /-- _-- -- - / // / // // II I // / / //// / /// I I I / / / / / / / / /// / ////I / / - / / / / / / / / I / REMAIN OR BE GRINDED AND USED / / / / / / /A / / / / / / / / / / / / � / / / \ / / / � / / / / / ,__---- _ -- / / / / / / / / / / I / / / / / / 3so S MULCH .FO GROUND COVER. / / / / / / / / / // // / / / / / / / / / / / / / / / / / / \ I / / l / I / /ll // ////// / ( _ / / / \ / AS CONSTRUCTION OF THE PHASE 2 / / / / / // / / / / / / / j I / / / /// / // 1 / / / // / / / / � / / / / /// / / / /` /// / - DIVERSION REACHES THE AREA THAT / / / / / / / / / /// / / ,_ -�/ / / / / / _ _ / / / / TEMPORARY BASIN 4 SDO-1) I / / / / // / / /// - / / - / / / _ -- --- REQUIRES FILLING, ENSURE PHASE 1 // / / / / / / \ /- / // // / / / / / /�� / / / / / N / // / / /// // / // i / - / - - _ / / / BOTTOM ELEV=267.0 1 / / REMOVE TEMPORARY DIV�RSION / \ i ( / / // - - DIVERSION IS DIRECTING WATER AWAY // / / / / I / // // / // / / / / - / / / // / / / �I ' / / // I / /////////// / / \ DITCH WHEN CONSTRUCTION OF / - - \ �� \ \_/ / -----/ /-- FROM THE FILL AREA. ONCE THE PHASE // / / / ///i/ / // // / // / // / / \ SPILLWAY=85' LONG ® ELEV=270.0 / / / / / / / / ' / / / (/ I / //////////// v v v v v / // / --� / // / /// / / V 1 BERM=272.0 / / / / / / / / / i // // //////////// / BERM BEGINS. ENSURE SILT \ \\ --// /// -- / / - / // / / / / / (� / / / /� / FE C IS IN LAC AS SHOWN. _______� I - \ \ \ \ \ / \ 2 DIVERSION IS COMPLETE, THE PHASE 1 / / / / / / / // / j// / / / / / / / \ ' 36" CMP RISER - CREST ELEV=269.0 / / / / I / / / / / / /// / l i Fj P �_ \ \\ \ \ / / / ------ DIVERSION AND BASIN MAY BE REMOVED. // / -/ / // / / / \ i / / / ---- - v v v / /---- / / / / / / I / / / I / ( / / / / ` - - - \ \ \ - \ \ \ \ \ v / / " / � _ __ - - _ \ COORDINATE WITH INSPECTOR. / 11 / / / - / / / / 60 LFf 36 CMP OUTLET BARRELL: / / / // I 50' 1 I I q I I I I I I l l , llll/ ////l / / / / ( -- ------ v vv vv� v �v 11 '_1 / / / — --- I / �_ / / / / // / / / // / / / / / / / - / / / / / / / SE I / 1 �\ v v / / __ A \ \ I INV IN=263.2 / l / l / / / / V R III I I I / I l // I 111 /// ( � v- vv vv v �v v v v / / _ --- --- v \ V A I I I I I I ---- / // /// / // / // / I I ,INV OUT=262.0 / / / / / / / / t B F ER 1 II I I II /Il/ I/lI I/// 111/, / I \ \� / / \ / / / DESIGN STORM=25 YR / I I I 11 I l l / / / - / i III I / / / / I / / I ---- vv vvvv v vv v / / _- v \ V v /v / / 1 /n I II III I I II I 1 // \ ` - --- \ \ \ END DIVE SION DITCH 1A. ��//// // / \START DIVERSION DITCH 1B. / / / / / I / _n / II I (I I Ill /I I /V A vv vv v----_- v �vv vv v v /// - - v v A V A \ SEE DIVERSION DITCH CHART ON DETAIL // / / / / / \ l l / / / l l I / I I III III I III III I11 I 1 I \ `v v v v v _ -- _ v v \ ` \ `/ / / / / - - v ` \ \. S EET , FOB DIMENSIONS LINER. _ / / / _ _ / SEE DIVERSION DITCH CHART ON DETAIL / / / / / / I I I I // I I I I I I I I I vv v V A \ // v vv v A �D / / / / / / 1 1 I I I II II II rl v -- vvv ��v-- --__- - v v A \ V �/ / /---- -_-_ - V A-� _-' '////// / y -// //SHEET FOR DIMENSIONS AND LINER. 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/ �DISS ER AT SL E DRAIN OUTLET / I i // v v v v A A ♦ --- \\ V A 1 I I I I\ V A -� /--'--' -_--_- A v- v v V A A \ V A V �Q �F-� o A - - � /i / ti- ' � ///® --- -- v v v � V AVvv --- i VV\VA I I I I I \\ I I \\ --- - SEE SHEETS 4 - 7 \ \ \ \ J \ \ - (P R CHART DETAIL SHEET, TYP // o ,, .ram \ \ \ \ \ \ I I \ - - / / - \ v - v v v \ \\ v v\ v v FF , p yr- o �-- / / / ` v v v v� vy \ v �A V A \ V A V I I I I \ \ \ � WEIR LOTION APT BOTH" ENDS OF BASIN) / / / // / \ v v A -( - A \ V I I VA / --- -----� \ v - v A \ - CAR BAFFL /� \ / / / / - V A \ v A v� //CAI V A\ 1 \ \ \ --/ - \ \ \\ \ \ \ I /�/ // \ A v I \ �1\\ \ \V A\\ VAVA ---- v A v - v A V v. v - /; / A \ v \� \ \ A \VA\ V A \\ \ V A \ \\ v V �� A \ \ V A \ V A v �� 1.5"0 IMM /i / / / ----- v A \ \�� \ \VA AVA � A VAA v - A A A r / / / v V A \---- A\VA \' \\VA V\ VA \ v A A v A A \ V A \ _' cv 1.2 ORIFICE �/ / / / v \ \ -_----- A V A \ V A \ \ \ ca /� i / / / / A \\ �1V \\V A��\�A�AA A1111 A� AA� / -- A v \ V v \ \ \ V \ � �- -�x�� ENERGY DISSIPATER i / I / / / y v V ♦ A\\ \\VA v� \11 II 1 \ , v \ V A A \ I A V cat _ I / // /// \ \ A \� A\VA vvv VA\ 1 1 1 V A \ -------- \ \ \ \ \ \ \ \ I CLASS 4 WRxP 18APT K� • / / / --- TRIANGLE QUARRY \ \ \ \ \\ \\ \\ 11 \ \ \ v \ V I \ V A I I I \ ) - � /�/'/ 1 /' / / /v / �\ \ \ ��, �� \\\V\vvv\ VA\VAA\ �A \ VA - �r ♦ - ♦ / EXPANSION \ \ ) / / / / / / _ SEE SHEETS 4 - 7 \ I x \ \ \ --__ -\ �\ I 1 / / 00 / / / / �, \ \ \\\ II11\\\\\ \\ \ \ _ / --- ♦ \1 II \\ \ \\ \ v vv v I / / / / � �� v / / / I w vA\1 I1v VAvv V / S I ` - 00 - v-- / - / / I / 100 �\\_\1\1 \\\\ 1\ \\\\\ \� v A I / / / / / /am - / // 0 / / / m \ / - ', J� / � / / A V V I \ A\\ \ \\ \ — � \ \ I / // // // // // // // v� — /v / / \ \ \ \ \ "i � / / / / // // // / / / - — _ 00 - v 0 \ I �v � - 14 II11 \VAVA v � vvv. - :j- -_-- \ I / / / / // / - / / -/ / \ \ \ \ I' / \ 11 IIII11\\ \\\ 11 \ v \ ! / I Vv 1 v IIVVA\VA \v v\ \� / // // // // /'/ // / _ 1 \\ vV A J A\\ \ \ / / / / // / // / /// I -- / // - I \\ ) . 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I A / / / / / / ( \ V \ \ / /In ,/ v v- - \ V / / -------------- I J / / ' / / / 1 / \ \ \I 11\ V / / / / / / \ \ // / I v v v / / / // N v I I I I / / / / A\\ I \ I l / / // // v' v / / /�\ / \/1 / l / / $ // \y\ // // / /� ---------_ v I I l I l l /� / // / / 1 / I IIII ///I I\ I vv / / / / i /v // / / - / / l / / 2a / / / �/ /// // ------ _'__� \ 1 / I l l / / / / / I \ I I I I I II(l A \ v 1 / / /l / // / / // a ---- / / / ---v v 1 / / l I III \ / / / / // /' / / / // / / a - vv vv v A\\\ \ \ / // / // $o - \op / / �/, / 2 v v v / // / 2/ ' V A I I / / // // / // / /// // // / 11 III/ I\\ II I / / / / / � / / / / / v v v vvvN �\ \ \ V I / / / / -- -_ V A I 1 / / / / / / / / / I / I I I V / / / / / / / // � / / / / v v� v v/ / v / / / / v 1 \III I V Ill A / / / I /_ / / ,-- o -� A I I I / / / I / // �/ /� / / $° �/ �� --- l l / / / / / / / v 1 /� 1 I I I I IIII / v \ / // / �/ //- /y// // // //// 2 /// �.-� /IIII /v N 280 �v \ l // IIII // // l l/ l 1 / I I 1 1 IIII 1 __ / 3p0 vv / r/ / / / l l / 1 // I I IIII IIII 11 / / / / / / / I \ ) \ < / _—/ / / / // — / / v v / / / I I / \ � �_ / / �/-�_-- -- / \ I I � / I / / /l IIII I \/ 1 I EROSION CONTROL LEGEND / / / I I 1 1 V,�, vv \\ \ \ - v1 v� v v\� / / / V III I I I \ v v v l/' / - - y 28p /, - /' z90 . 111 V A I III / J I l j I / / / 3�0 � / / / / I l ( / / / / 111 I 111 \ II \ \\ \ \\\\ \\� \ \ 1 I / / / I \ / - \ V v v \ V I / / / / )) _---_///� - A V 1 V I IIIII / I I / / / / // \. \� A AV � v vv v �-,�A\ \ \,A � i ! i/ //_ �//�— - �/ --� ��, A \\ \� \\ \AA\\\\V\ \I\\� I / I � � I I i � � I � I /I/ / // ,/ // v'- EROSION CONTROL NOTES: 1. THE DISTURBED AREA BETWEEN THE PRIMARY EROSION AND SEDIMENTATION CONTROL MEASURES AND THE DIVERSION DITCH SHALL BE SEEDED AND MULCHED IMMEDIATELY. 2. UPON CONSTRUCTION OF ALL BASINS, IMMEDIATELY STABILIZE ALL SIDE SLOPES WITH SEED AND MAT SIDE. 3. SEE CHART ON DETAIL SHEET FOR TEMPORARY DIVERSION DITCH MINIMUM DIMENSIONS AND LINER REQUIREMENTS. 4. SEE CHART ON DETAIL SHEET FOR ENERGY DISSIPATER DIMENSIONS AND REQUIREMENTS. 5. SEE CHART ON DETAIL SHEET FOR SEDIMENT BASIN DIMENSIONS AND DESIGN DATA. - - PROPERTY LINE/PERMIT B❑UDARY LIMITS OF DISTURBANCE TEMPORARY DIVERSI❑N DITCH LINER AS N❑TED ❑N PLAN —SF---TrSILT FENCE SILT FENCE OUTLET CHECK DAM NEUSE RIVER BUFFER Z❑NE 1 NEUSE RIVER BUFFER Z❑NE 2 / // // / / ## ( / /�vl l///�//I III / III/ / / /a V1, I/,// / /////�1 / / �i'i /i (I .x . NORTH 0 60 120 180 SCALE IN FEET : 1 "=60' RBAq1AAIB@lljUP 8522-204 SIX FORKS ROAD RALEIGH, NORTH CAROLINA 27615 919.845.7600 PHONE 919.845.7703 FAX ENGR. FIRM LICENSE #F-0843 Q Z o.j } QO w Ow OC Z Y v QO w= D- w�_ cf (l) w w Z UO wQ >. Z .J0 o 0% CD X w = Z W w CD < =) ww of w 0 J Q 1111"MIx Ow I SSU ED: 16 MAR 2020 REV I SI ON S: 1� 30 SEP 2020 PER NCDEQ COMMENTS DRAWN BY: MLS CHECKED BY: MILS, PROJECT: WSRDUQ EXISTING QUARRY ROAD IMPROVEMENTS 1 OF 2 DWG. NO. SITE 8 vv � -----vv-------— _ — \�---- ——--—--- — _ / 1 1 111 III I I I — l ll ll Ill/ \ \\\\ \\ � — ^\ I // I r / ------ -- oor—� v ch / / / � // / / / // / � / � — v v vvvv vvv _ v v�ovv v� v v I / I I i � � \. \------- ,/ ./ i i / i / / / / / � / /�� / ./ / ,\\�\ /l i �✓,l.l.//�/./i .r//iii / // /�/ / (l/ i / \��\a \ \\��\\��\�.\�� \ \\ \� � �� ---�ii%ll (///./ I / I i / / // // // / ///l l l / / IIIII /�/��--------------------� �/� / i �/ / / /// /� j// /��_— \\ \ \✓/ ////j%/ 10 / l I I / J 1 � X — I I I I I / (( 1 1 1 I III I / got � � / / / el I I III 1 \ \\ 1 1\ 1 1 40 cif` i / / _� \)1 0 \ Il / l /// / PREVIOUSLY APPROVED -- // / // / /// /////' //i=-------- ---� / / / / \%/ )I LIMITS OF DISTURBANCE — NEW CONCRETE i% BLOCK WALLS TYP /// l SPECIAL SILT FENCE PER NEW / /i/�%/ �/ll//l/ / � /� DETAIL ON DETAIL SHEET � — // / / /// / / / / // / / / / / / / -- � ♦ \`_ \ \ \\ \�\�\� \\\ \\\\��D�\�\\\( \\ems\\ \ / , 2�= / / / / �/� _ ///��//!' � ♦ \\\ � III\ \\\ \\�\ �\ \\ \ ////�/ l / / I // Iljllll// /11 ,_ � ��\\\\\\\ \ \ / �� \\\\ w X \\\� �\�\\\\\��\\\�\�\\� �1►'= � � I lI ill/ //// //'\ 1 \ \\\ \\\� /// / / / / III / JI I((( /// / \ �vVw vvvvv v\ v // v �vv�vvv v vvv vvvvv�vv� v �v �v ♦ / I l /(/ Ill /// v� �v ,�// / / / //ll / /II IIIII//t �/ \ \\\\ �� \\ \\� // �\� � � \ \\\ \\\\\ �\\\\\ \ �\\ ♦ I \ vl 11\I �\\\\\ \\\ \\ '4W/�'\_— \ \\`;—\—� /�\� \\ \ \\\\\ \\ \\\\\\ \\�\— � ♦ \ \ � \\\\ \ \ \ ( /\\\ \ / �• /// //// // /III / —� \ \— \\\� \\�\�— �\\\\ — \\�\\� \\\\ \\ �\ \\ \\\\\\ \\\ \\\� �\ \ m \ \ \ \ \ \\ \ \ \ \\ \ \ / NOTE•----- / NEW DRIVEWAY TO BE GRADED TO \\\ — — —\\\� � — \\ �� \�`"�= �`� \ \\\\�J �\ �\\\\ — 1--�� \� \ \\ �\\ �\ \ \ \ — , -- � /// /// i //�/�/// �///j'- \\\\\� \ \\�—\ � \ \ \ a�\tom \ — \ \/ \✓\ \ \\\ //-� \\�� \\ \\ �� \ \ Q\��\ �\� \ \ -- I / / � \ � \\\\ \---__ �-- � i /t0 ��//ll/////// /// \��%l \ — / Vvvvv \V �= _�� --v\ vvv�vvvvvvv �vAVAVA v�Vvv vv v _�-VAA1 1 \V\A\vvvVA\ vvv �AVA�� Avvvvv� VAAw ��/,!��/j / rn / VAS I — \\ — �/ '/ � / (ll /// /l 1 /vvVA V v J///i v vwavvvvv_v v11A\vw vv\ vvvvvv vvv 1 Vv�� vvv v vvvvvv�VAvV 1 VA\ �v�IIIII vvv ll\ vvv V A � V A v V ,— v Vv /V � _/ l \Vw��ie�; _ --- _ / v — \_— \ vvv A�v \ vvv � \ \ vV A00v vvvvv � vvv \ vvv vvv vvvvv \ � V A v A vvvv VA ��vvv —� v vv �vvvvvvvv v v /� �-'- = v— vVv v A \\ vv v V A \ v A \\ \V A v AA\ \V \ v A v v v vv AV A\ v v co A Go x X co \\ \ \\\ \\\\\ \\\\\\ \ \ \\\\\\ \\ \\ \\\\\\ \` �\ \�\\ \\\\\ \\ \ \\ \\ \\ \ v— vvvw X v v�v�vvevv \VAA vvvvvvv � vv A\ v A //A vvy -,- vv y v� v _ vvv \ v vvv — vvv vv v vv� vv vvv vv vv vv v vv vvv -, 1 \ I I v v v vvv v\ vv � vv vv v v 1 �v \ v v � v v v v vv v vv v v vvv v v v vvv v I vvv v-- �yv\V AVAv v _�vVvvv 1vv\\\v 1 \\\Vv l\ v w v vVA\II vv�A �vvwvv vvvv vv ��vv vv��vvv vv vvv vv v vvvv vvvv I ��vvvv�v v �v�� lA�vvVAAVA \ V A 1 I I\ VAVA VA ) m i v�v�vvvvvv �v�vvvv � v�vvvv�vv vv�vov vvv vvvv vvvvv�vvvvvv�vvvvv� Vv IIIII III _—___ — ��j—=-- �\ \\\ \ \VAvvv vvv v�111 ) v 111111(I(\ (Illlll l � X� (/ I \ 1 \ 1 \ \ v f I v 0 \ I v 1 1 \ 1 v I 1 \ VA\V�v�A�V A\\1 vvv\VAVA )) Avvv 11)/V A� 11A1�11V IlllllVA� vv IIIVA1AA11 11 / � )1\vsvww A�Allf/I A 1111111111( VI\II�Aw1)Il�w�vVAIIII/ll\\VA\V � V A\\VA\VA\ v� v \ v�v�v\\\1 A 0\\1 1 A � )� / /j II \vv v VA I � 1 � 11 AIII II 111AAVA\\ v III) I / � �vv AV IIIIIIIIIII 1 I IIIII Ih /III\VA\VAvl1 VAv w��rJ) I I (llV v vvv A A \\V I vvv v �� v�AV1\((VA\V I\ �\u/�/ /IIV� vvv II lJ ) I VI 111 II AIIIIA1 /l V 111 /lI //Ill/ 4 vvv //l v wvVv\\\ Illjll / / IIIIIIIIII VA\\VI IIII vAA/ //ll vvvv v v \ I A\VA � � 1\\ \ I l l I1 // 1 VA VA 111 � / / /�1 I I I III I JJlI) 1 / l l l I °D X 00 X to I I ll ll iiiJl 1\ \ vvv \\ to X X o 111�/// l ) l I h 111/Ill / I l/ 11 I I 1 Illllglll Illll/ l IIIII/�///ii// h\\\\ \ \\\�\ \\\\ \\\\\\ �\ \\� \� \\\ \ \\\\\\ � �\ / IIIII//// / ((t \\\ \\\\ \\�\\\\\\\\\\�1 \ \\\\\\\\ \\\ � M ATCH L I N E- SEE SHEET 1 OF 2 FOR CONTINUATION EROSION CONTROL NOTES: 1. THE DISTURBED AREA BETWEEN THE PRIMARY EROSION AND SEDIMENTATION CONTROL MEASURES AND THE DIVERSION DITCH SHALL BE SEEDED AND MULCHED IMMEDIATELY. 2. UPON CONSTRUCTION OF ALL BASINS, IMMEDIATELY STABILIZE ALL SIDE SLOPES WITH SEED AND MAT SIDE. 3. SEE CHART ON DETAIL SHEET FOR TEMPORARY DIVERSION DITCH MINIMUM DIMENSIONS AND LINER REQUIREMENTS. 4. SEE CHART ON DETAIL SHEET FOR ENERGY DISSIPATER DIMENSIONS AND REQUIREMENTS. 5. SEE CHART ON DETAIL SHEET FOR SEDIMENT BASIN DIMENSIONS AND DESIGN DATA. EROSION CONTROL LEGEND — — PROPERTY LINE/PERMIT B❑UDARY LIMITS OF DISTURBANCE TEMPORARY DIVERSI❑N DITCH LINER AS NOTED ON PLAN SF SILT FENCE SILT FENCE OUTLET CHECK DAM NEUSE RIVER BUFFER ZONE 1 NEUSE RIVER BUFFER ZONE Z NORTH 0 60 120 180 SCALE IN FEET : 1 "=60' 8522-204 SIX FORKS ROAD RALEIGH, NORTH CAROLINA 27615 919.845.7600 PHONE 919.845.7703 FAX ENGR. FIRM LICENSE #F-0843 Q QO O Q OC Z � U QO w= u. Z UO wQ }Z Q Z w w CEOF Q� w � Q OC 0 � Q � OC O oC I SSU ED: 16 MAR 2020 REV I SI ON S. 10 30 SEP 2020 PER NCDEQ COMMENTS DRAWN BY: MLS CHECKED BY: MILS PROJECT: WSRDUQ EXISTING QUARRY ROAD IMPROVEMENTS 2OF2 DWG. NO. SITE 9 35 % of basin surface area I st Cell 2nd Cell 25%ofbasin� 25%ofbasin surface area surface area INLE ZONE OUTL 15%of ILi basin surface area 11 FENCE AND FABRIC BURIED IN TRENCH STEEL POST I 6"X6" TRENCH, BACKFILLED AND COMPACTED NOTES: 1. BAFFLE MATERIAL SHOULD BE SECURED AT THE BOTTOM AND SIDES USING STAPLES OR BY TRENCHING AS FOR SILT FENCE. 2. MOST OF THE SEDIMENT WILL ACCUMULATE IN THEIST BAY, WHICH SHOULD BE READILY ACCESSIBLE FOR MAINTENANCE. 3. PROVIDE 3 BAFFLES (USE TWO IF LESS THAN 20 FEET IN LENGTH). PROVIDE EXISTING 5 BAFFLES FOR DRAINAGE AREAS GREATER THAN 10 ACRES. 4. BAFFLE SHALL BE 700 G/M2 COIR EROSION BLANKET. ROADWAY 5. TOPS OF BAFFLES SHOULD BE 2 INCHES LOWER THAN THE TOP OF THE BERMS 6. INSPECT BAFFLES FOR REPAIR ONCE A WEEK AND AFTER EACH RAINFALL CROSS SECTION SUPPORT ROPE SUPPORT POST TO WIRE TO 24" INTRO BOTTOM PREVENT SAGGING OR SIDE COIR MESH OR SIMILAR, STAPLED OR TRENCHED INTO BOTTOM OR SIDE STAKE TO SUPPORT WI_ STANDARD BAFFLES DETAIL \ \ \ 03 / / / CLASS 1 RIP RAP (SEE SECTION THRU BASIN BELOW) N J \ INVERT � RIP RAP HEADWALL i / I #5 WASHED STONE. 1'-O" THICK x S-O" HIGH MINIMUM sE�� ////llllllllllllll�'% MENT STORAGE AREA IPERSPECTIVE VIEW / NO SCALE / SEDIMENT STORAGE AREAS TO BE DISTURBED RIP RAP (CUT, FILL, ETC.) FLOOD STORAGE ZONE HEADWALL Ci \ PIPE NATURAL GROUND "tow 1 INVERT \� 1.5' 3' ----------------------- --FLOW CLASS 1 RIP -RAP MAXIMUM SEDIMENT DEPTH #5 WASHED STONE (CLEAN OUT POINT) SECTION THRU CATCH BASIN, FILTER AND CULVERT PIPE NO SCALE STANDARD HORSESHOE INLET PROTECTION -- TOP ELEVATION OF STORMWATER #5 WASHED I - STONE EXISTING SLOPE 1' #1 RIP -RAP VARIES RAP FRONT VIEW NOTE: REMOVE SEDIMENT ACCUMULATION FROM BEHIND CHECK DAMS TO PREVENT DAMAGE TO CHANNEL VEGETATION. FLOW SHOULD BE MAINTAINED THROUGH THE DAM. STANDARD CHECK DAM GROUND STABILIZATION AND MATERIALS HANDLING PRACTICES FOR COMPLIANCE WITH THE NCGO1 CONSTRUCTION GENERAL PERMIT Implementing the details and specifications on this plan sheet will result in the construction activitybeing considered compliant with the Ground Stabilization and Materials Handling g P g sections of the NCGOl Construction General Permit (Sections E and F, respectively). The permittee shall comply with the Erosion and Sediment Control plan approved by the delegated authority having jurisdiction. All details and specifications shown on this sheet may not apply depending on site conditions and the delegated authority having jurisdiction. Required Ground Stabilization Timeframes Stabilize within this Site Area Description many calendar Timeframe variations days after ceasing land disturbance (a) Perimeter dikes, swales, ditches, and 7 None perimeter slopes (b) High Quality Water 7 None (HOW) Zones (c) Slopes steeper than If slopes are 10' or less in length and are 3:1 7 not steeper than 2:1, 14 days are allowed -7 days for slopes greater than 50' in length and with slopes steeper than 4:1 -7 days for perimeter dikes, swales, (d) Slopes 3:1 to 4:1 14 ditches, perimeter slopes and HQW Zones -10 days for Falls Lake Watershed -7 days for perimeter dikes, swales, (e) Areas with slopes ditches, perimeter slopes and HOW Zones flatter than 4:1 14 -10 days for Falls Lake Watershed unless there is zero slope Note: After the permanent cessation of construction activities, any areas with temporary ground stabilization shall be converted to permanent ground stabilization as soon as practicable but in no case longer than 90 calendar days after the last land disturbing activity. Temporary ground stabilization shall be maintained in a manner to render the surface stable against accelerated erosion until permanent ground stabilization is achieved. GROUND STABILIZATION SPECIFICATION Stabilize the ground sufficiently so that rain will not dislodge the soil. Use one of the techniques in the table below: Temporary Stabilization Permanem Stabilaation + Temporary grass seed cwerec Wthstraoror +Pe"errcgrassseejcweredwi[hstra Ur other mukhesandtackifiers othermulches andtackifias + Hfdresecding • Geotertilef�ricssudlaspermancrKsoil + Rolled erosion control prndurtswith or reinforcement matting v thouttamporary grass seed F;+droseeding + Appropriaely applied straw or other mulch + Shrubs or other pamane L plantings covered « Plastic sheeting withrnulch • Uniform and &EnNdixribucedgraundcover suffi ci ert to restrain erosion « Structurd mLthodssu:h asco-ncreite, wphdtcr retai ningw A I s • Rolled erosion control productswith gFass seed POLYACRYLAMIDES (PAMS) AND FLOCCULANTS 1. Select flocculants that are appropriate for the soils being exposed during construction, selecting from the NC DWR List of Approved PAMS/Flocculants. 2. Apply flocculants at or before the inlets to Erosion and Sediment Control Measures. 3. Apply flocculants at the concentrations specified in the NC DWR List of Approved PAMS/Flocculants and in accordance with the manufacturer's instructions. 4. Provide ponding area for containment of treated Stormwater before discharging offsite. 5. Store flocculants in leak -proof containers that are kept under storm -resistant cover or surrounded by secondary containment structures. NOTES: 50' MIN. BUT SUFFICIENT TO KEEP 1. PUT SILT FENCE OR TREE PROTECTION FENCE UP TO ENSURE CONSTRUCTION ENTRANCE IS USED. SEDIMENT ON SITE 2. IF CONSTRUCTION ON THE SITES ARE SUCH THAT THE MUD IS NOT REMOVED BY THE VEHICLE TRAVELING OVER THE STONE, THEN THE TIRES OF THE VEHICLES MUST BE WASHED 2"-3" STONE TO BE USED 25' OR WIDTH OF BEFORE ENTERING THE PUBLIC ROAD. (SURGE STONE OR RAILROAD PROPOSED STREET, BALLAST) WHICHEVER IS 3. MAINTAIN GRAVEL PAD IN A CONDITION TO PREVENT MUD OR GREATER. SEDIMENT FROM LEAVING CONSTRUCTION SITE. ENTRANCE WILL REQUIRE PERIODIC REMOVAL OF SEDIMENT -LADEN STONE AND REPLACEMENT WITH FRESH STONE. PLAN VIEW 35' MIN. 15' MIN. NEW CONSTRUCTION EXISTING ROADWAY 12" MIN. 6" MIN. \ \ \\ TOP OF SILT FENCE MUST BE AT LEAST ABOVE THE TOP OF THE WASHED STONE STEEL FENCE WIRE FE HARDWARE CLO FILTER OF #57 WASHED STONE", BURY WIRE FENCE AND HARDWARE CLOTH \-FABRIC UNDER STONE CROSS SECTION STANDARD CONSTRUCTION ENTRANCE - 4' MIN. - I SILT FENCE STEEL FENCE DUST CLOTH IN TRENCH POS� SET MAX 2' APART MIN. 18' INTO SOLID rCE. GROUND f 8'-01, MAXIMUM MINIMUM 10 LINE WIRES FRONT VIEW STEEL POST NOTE: WOVEN WIRE FABRIC 1. USE SILT FENCE ONLY WHEN DRAINAGE AREA SILT FENCE FABRIC DOES NOT EXCEED 1/4 ACRE AND NEVER IN AREAS OF CONCENTRATED FLOW. x 3'-DT1 o FILL SLOPE 2. REMOVE SEDIMENT DEPOSITED AS NEEDED TO 26„ 3 z AND TO REMOVE PRESSURE ON THE SILT FENCE. PROVIDE STORAGE VOLUME FOR THE NEXT RAIN N GRADE 8" MIN 2'-0" BACKFILL TRENCH AND COMPACT -44" MIN THOROUGHLY SIDE VIEW STANDARD TEMPORARY SILT FENCE IMUM 12-1/2 GAUGE RMEDIATE WIRES GRADE A N MENN�� OVA 1■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIII■■■■■■■■■■■■■■■■■■ilffi ■■■■■■■■■■■■■■■11■ 1■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIII■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■II■ 1■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIII■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■11■ 1■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIII■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■II■ 1■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIII■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■11■ 1■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIII■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■II■ 1■■■■■■■A■■■■■■■■■■■■■■■■■■■■■■■■■IIII\■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■II■ 1■■■■■■■L'■■■■■■■■■■■■■■■■■■■■■■■■■IIII■\■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■11■ 1■■■■■■■■\■■■■■■■■■■■■■■■■■■■■■■■■IIII■\■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■II■ 1■■■■■■■■1\■■■■■■■■■■■■■■■■■■■■■■■■IIII■■\■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■11■ i IIII III I I- 3' FILTER FABRIC II Li ON GROUND NOTES: 1. REMOVE SEDIMENT WHEN HALF OF STONE OUTLET IS COVERED. 2. REPLACE STONE AS NEEDED TO ENSURE DEWATERING. \BURY 6' OF UPPER EDGE OF FILTER FABRIC IN TRENCH u SECTI❑N VIEW STANDARD SILT FENCE OUTLET NOTES, 1, CONSTRUCT THE ENTRANCE TD THE SLOPE DRAIN OF A STANDARD FLARED -END SECTION OF PIPE WITH A MINIMUM 6-INCH METAL TOE PLATE (CROSS-SECTION VIEW), MAKE ALL FITTINGS WATERTIGHT. A STANDARD T-SECTION FITTING MAY ALSO BE USED AT THE INLET. 2, USE AN EARTHEN DIVERSION TO DIRECT SURFACE RUNOFF INTO THE TEMPORARY SLOPE DRAIN, MAKE THE HEIGHT OF THE 0.5'-1' BERM OVER THE DRAIN CONDUIT A MINIMUM OF 1.5 FT AND AT LEAST 6 INCHES HIGHER THAN THE ADJOINING BERM ON EITHER SIDE. �MAX. D THE LOWEST POINT OF THE DIVERSION BERM SHOULD BE A 1 ;V MINIMUM OF I FT M ABOVE THE TOP OF THE DRAIN SO THAT DESIGN FLOW CAN FREELY ENTER THE PIPE. 3. PROTECT THE OUTLET OF THE SLOPE DRAIN FROM EROSIM WITH RIPRAP DISSIPATOR. SIDE VIEW CONSTRUCTION NOTES: HEIGHT & WIDTH DETERMINED BY EXISTING TOPOGRAPHY AND SEDIMENT STORAGE REQUIRED. KEY RIP RAP INTO THE DAM FOR STABILIZATION. EXISTING -- GROUND STEP SEQUENCE EQUIPMENT AND VEHICLE MAINTENANCE 1. Maintain vehicles and equipment to prevent discharge of fluids. 2. Provide drip pans under any stored equipment. 3. Identify leaks and repair as soon as feasible, or remove leaking equipment from the project. 4. Collect all spent fluids, store in separate containers and properly dispose as hazardous waste (recycle when possible). 5. Remove leaking vehicles and construction equipment from service until the problem has been corrected. 6. Bring used fuels, lubricants, coolants, hydraulic fluids and other petroleum products to a recycling or disposal center that handles these materials. LITTER, BUILDING MATERIAL AND LAND CLEARING WASTE 1. Never bury or burn waste. Place litter and debris in approved waste containers. 2. Provide a sufficient number and size of waste containers (e.g dumpster, trash receptacle) on site to contain construction and domestic wastes. 3. Locate waste containers at least 50 feet away from storm drain inlets and surface waters unless no other alternatives are reasonably available. 4. Locate waste containers on areas that do not receive substantial amounts of runoff from upland areas and does not drain directly to a storm drain, stream or wetland. 5. Cover waste containers at the end of each workday and before storm events or provide secondary containment. Repair or replace damaged waste containers. 6. Anchor all lightweight items in waste containers during times of high winds. 7. Empty waste containers as needed to prevent overflow. Clean up immediately if containers overflow. 8. Dispose waste off -site at an approved disposal facility. 9. On business days, clean up and dispose of waste in designated waste containers. PAINT AND OTHER LIQUID WASTE 1. Do not dump paint and other liquid waste into storm drains, streams or wetlands. 2. Locate paint washouts at least 50 feet away from storm drain inlets and surface waters unless no other alternatives are reasonably available. 3. Contain liquid wastes in a controlled area. 4. Containment must be labeled, sized and placed appropriately for the needs of site. 5. Prevent the discharge of soaps, solvents, detergents and other liquid wastes from construction sites. PORTABLE TOILETS 1. Install portable toilets on level ground, at least 50 feet away from storm drains, streams or wetlands unless there is no alternative reasonably available. If 50 foot offset is not attainable, provide relocation of portable toilet behind silt fence or place on a gravel pad and surround with sand bags. 2. Provide staking or anchoring of portable toilets during periods of high winds or in high foot traffic areas. 3. Monitor portable toilets for leaking and properly dispose of any leaked material. Utilize a licensed sanitary waste hauler to remove leaking portable toilets and replace with properly operating unit. Stabilize Outlet N, ONSITE CONCRETE WASHOUT STRUCTURE WITH LINER T ii 41 _ + 01-- -- wjw- d,..• "" .= `ss=. ELM ffir%AM2R%W.V neu illll m"."= 221- CONCRETE WASHOUTS 1. Do not discharge concrete or cement slurry from the site. 2. Dispose of, or recycle settled, hardened concrete residue in accordance with local and state solid waste regulations and at an approved facility. 3. Manage washout from mortar mixers in accordance with the above item and in addition place the mixer and associated materials on impervious barrier and within lot perimeter silt fence. 4. Install temporary concrete washouts per local requirements, where applicable. If an alternate method or product is to be used, contact your approval authority for review and approval. If local standard details are not available, use one of the two types of temporary concrete washouts provided on this detail. 5. Do not use concrete washouts for dewatering or storing defective curb or sidewalk sections. Stormwater accumulated within the washout may not be pumped into or discharged to the storm drain system or receiving surface waters. Liquid waste must be pumped out and removed from project. 6. Locate washouts at least 50 feet from storm drain inlets and surface waters unless it can be shown that no other alternatives are reasonably available. At a minimum, install protection of storm drain inlet(s) closest to the washout which could receive spills or overflow. 7. Locate washouts in an easily accessible area, on level ground and install a stone entrance pad in front of the washout. Additional controls may be required by the approving authority. 8. Install at least one sign directing concrete trucks to the washout within the project limits. Post signage on the washout itself to identify this location. 9. Remove leavings from the washout when at approximately 75% capacity to limit overflow events. Replace the tarp, sand bags or other temporary structural components when no longer functional. When utilizing alternative or proprietary products, follow manufacturer's instructions. 10. At the completion of the concrete work, remove remaining leavings and dispose of in an approved disposal facility. Fill pit, if applicable, and stabilize any disturbance caused by removal of washout. HERBICIDES, PESTICIDES AND RODENTICIDES 1. Store and apply herbicides, pesticides and rodenticides in accordance with label restrictions. 2. Store herbicides, pesticides and rodenticides in their original containers with the label, which lists directions for use, ingredients and first aid steps in case of accidental poisoning. 3. Do not store herbicides, pesticides and rodenticides in areas where flooding is possible or where they may spill or leak into wells, stormwater drains, ground water or surface water. If a spill occurs, clean area immediately. 4. Do not stockpile these materials onsite. HAZARDOUS AND TOXIC WASTE 1. Create designated hazardous waste collection areas on -site. 2. Place hazardous waste containers under cover or in secondary containment. 3. Do not store hazardous chemicals, drums or bagged materials directly on the ground. NCGOI GROUND STABILIZATION AND MATERIALS HANDLING EFFECTIVE: 04/01/19 EARTHEN STOCKPILE MANAGEMENT 1. Show stockpile locations on plans. Locate earthen -material stockpile areas at least 50 feet away from storm drain inlets, sediment basins, perimeter sediment controls and surface waters unless it can be shown no other alternatives are reasonably available. 2. Protect stockpile with silt fence installed along toe of slope with a minimum offset of five feet from the toe of stockpile. 3. Provide stable stone access point when feasible. 4. Stabilize stockpile within the tmeframes provided on this sheet and in accordance with the approved plan and any additional requirements. Soil stabilization is defined as vegetative, physical or chemical coverage techniques that will restrain accelerated erosion on disturbed soils for temporary or permanent control needs. Cr S 4' min. Ber� Hold-down stakes\ 3:1 1.5' min , V Y1, 10' Spacing Plastic I I - 1 - I III I II III -I I Corrugated 1- _-III Inlet Pipe �� =I I /''/� I � �'I�W.v\V vl„yW./✓kA 1J'jI/ '�!/t M-,'v1.v.. ,•... ... n rwhW.uAN,o° Vyi6Hv,1�/,..L,yiV • d II nV µr,..ra,Y✓�Yny `^M r.� ,,,,.. , pA -III-III-I 'y . �,„. 4' min Yo-N.N level section rMN.NM'�Vmv *y,11.rV Nm\fd- oss-Section View Plan View Standard T-section CANDARD TEMPORARY SLOPE DRAIN NPOES Stormwater Discharge Permit for Constructiarl Activities (NC001) FICDENRlDiv;siorl of Water Quality "NEW STABILIZATION TIMEFRANIES ' Effective Aug. 3, 201T) SITE AREA STABILIZATION TIMEFRAME EXCEPTIONS SILT FENCE I I FASTENERS I (- OVERLAP FABRIC I I I IIII 6" BETWEEN III IIII 3'-0" 6" MIN AT ENDS %I I I (TYP) IIII �ILi POST FASTENERS 6" BETWEEN (TYP) SILT FENCE EXTENDED NOTES: INTO TRENCH 1. MAINTENANCE SHALL OCCUR WHEN NECESSARY. POSTS SHALL BE INSPECTED EVERY SIX MONTHS TO ENSURE STRUCTURAL SILT FENCE INTEGRITY. SILT FENCE SHALL BE INSPECTED WEEKLY AND ALL MAINTENANCE ISSUES SHALL BE CORRECTED AT THAT TIME. 8"X 4" TRENCH _ /-� 4" f.r EXCAVATED UP SLOPE FROM I I POLES, BACKFILL LJ AND COMPACT SPECIAL SILT FENCE MWore Agricultural LirrmbDrLe 2 ionsJacre (3 lonsfacre in clay sails), Fetitzer 1.000 lbslacre - 10-10-10 Supefphosphate 500 1bsiacre - 20 analysis Mulch 121ons,lacfe - small gram straw Anchor (Asphalt emulsion at 300 9alslacre Seeding Schediule Far Sl oul lers, Side Slopes (Max 3.1 Date Type Pie ntin!g late Aug 15- Tall 'Fescue 300 lbsifacre 140V 1 Nov 1- Tall Fescue Abruzzi Rye 300 lWacre Mar 1 Mar I -Apr Tall Fescue 300 Ibsifacre 15 Apr 15- Flu lied Common 25 1 bsfacre Jun Bernnud ag rass 30 Jul 9-Tall Aug FescueAND Browntflp 125 lbsifacre Jail Fescue); 35 1bsiacre 15 Millet or Sor!uh.um-Sudan (Britivntop lbslacre 'Sargh:um- (Hybrids* Sudan Hyil DESCRIPTION ..----------.-. Perimeter dikes, swales, ditches, ---------- 7 days .. ...- -- ... -.................. 'None For Sh:outders. Side Ditches. SI s (3.1 to O-y 'slopes High Qualify Water 7 days None '(HQVV) Zones ..... .. Date Type PlanVng Retie -Slopes steeper than 7 days If slopes are 1 G' or less in length and Mar '3:1 are not steeper than 2.1, 14 days are �- Sericea Lespiedeza --- allov�ed. _____________ (saaf fled) an-d use the 50 Ibs?acre � rll ea Lesptd�za): Slopes 3.1 or flutter 14 days 7 days for slopes greater than 50' in follev�ing combinations: fen_ 'AlI other areas with 14 days ------------..--..-------..-..-..---- None, except for perimeters and HOW Mar slopes flatter than 4:1 Zonos.------------------------............................ 1-r Add Tall Fescue 120 rbs�acre 15 Seedbed Preparation. 1- Chisel compacted areas and spread topsoil three inches deep over adverse soil Mar conditions, if avaaiIable. 1- Or add Hulled Common 25 rbsifacre 2. Rip the entire area to six inches deep. Jur1 DeFmudagrass 3. Remove all loose rock, raats and other obstructions, leaving SUrface reasonab€y 30 smooth and uniform. 4. Apply agricultural lime, fertilizer and superphosphate uniformly and rraix with sail A11 Tall Fescue AND Browntop 120 Ibsifacre (Tall Fescue)- 35 lbsifacre fsee mixture bell€ w). kept Mullel or �hr.m-Sudran (Sriavmtop Muller: 30 ibsr'acre (50rghL1M- 5- Continue tillage until a well-puiverized, firm, reasonably uniform seedbed is Hybrids Sudan Hybrids prepared four to six inches deep. 6. Seed on a freshly prepared seedbed and cover seed lightly with seeding equipment Sept Sericea Lespedeza or cultipack after seeding. 11- (unhulled - uinsaarified) AND 70 Ibsiacre (Sekea Lesp za), 120 7. Mulch immediately after seeding and anchor mulch. Mar Tall Fescue Ibsifacre Jalt Fescue? 8. Inspect all seeded areas and make necessary repairs or reseedings within the 1 4 planting season. if possible. 9f stand should be more than �0 /D damaged, re- P si r Nov establish establish following the original lime; fertilizer and seeding rates. 9- Consult S&EC Environmental Engineers an maintenance treatment and fertilization Mar AND Abruzzi Rye 25 bslacre after permanent cover is established- 1 SEEDING SPECIFICATIONS HIGH COHE LOW SOIL PUM ONSITE CONCRETE WASHOUT STRUCTURE WITH LINER 10'-0" MIN. A7 0 O O 0 0 0 0 0 0 0 0 SANDBAGS TYP.) OR STAPLE 10 MIL 1:1 PLASTIC SANDBAGS (TYP.) SIDE SLOPE LINING OR STAPLES (TYP.) O Z x CLEARLY MARKED SIGNAGE SECTION A -A CONCRETE NOTING DEVICE (18"X24" MIN.) WASHOUT NOTES: 1. ACTUAL LOCATION DETERMINED IN FIELD 2. THE CONCRETE WASHOUT STRUCTURES SHALL BE MAINTAINED WHEN THE LIQUID AND/OR SOLID REACHES 75% OF THE STRUCTURES CAPACITY. PLAN 3.CONCRETE WASHOUT STRUCTURE NEEDS TO BE CLEARY MARKED WITH SIGNAGE NOTING DEVICE. BELOW GRADE WASHOUT STRUCTURE 1n'_n" RAIN( NOT TO SCALE SANDBAGS TYP.) OR STAPLE HIGH 10 MIL COHESIVE & PLASTIC LINING LOW FILTRATION 1:1 SIDE SLOPE SOIL BERM (TYP.) O Z 00 2'-0" SANDBAGS TYP.) NOTES: OR STAPLE 1. ACTUAL LOCATION DETERMINED IN FIELD CLEARLY MARKED SIGNAGE 2. THE CONCRETE WASHOUT STRUCTURES CONCRETE NOTING DEVICE (18"X24" MIN.) SHALL BE MAINTAINED WHEN THE LIQUID WASHOUT AND/OR SOLID REACHES 75% OF THE STRUCTURES CAPACITY TO PROVIDE T-F ADEQUATE HOLDING CAPACITY WITH A MINIMUM 12 INCHES OF FREEBOARD. PLAN 3.CONCRETE WASHOUT STRUCTURE NEEDS TO BE CLEARY MARKED WITH SIGNAGE NOTING DEVICE. ABOVE GRADE WASHOUT STRUCTURE NOT TO SCALE NOTES: 1. USE NO. 5 OR NO. 57 STONE FOR SEDIMENT CONTROL STONE. 2. PROVIDE STABILIZED OUTLET TO STREAM BANK. 3. WOOD PALLETS MAY BE USED IN LIEU OF STONE AND GEOTEXTILE AS DIRECTED. A SUFFICIENT NUMBER OF PALLETS MUST BE PROVIDED TO ELEVATE THE ENTIRE SPECIAL STILLING BASIN ABOVE NATURAL GROUND. 4. THE SIZE AND NUMBER OF SILT BAGS SHOULD BE BASED ON THE DEWATERING PUMP AND MANUFACTURER RECOMMENDATIONS. 5. TIGHTLY SECURE THE PUMP DISCHARGE TO THE SILT BAG SLEEVE WITH A STRAP OR SIMILAR DEVICE TO PREVENT WATER/SEDIMENT FROM LEAKING WITHOUT TREATMENT. 6. CONTROL PUMPING RATE TO PREVENT EXCESSIVE PRESSURE WITHIN THE SILT BAG IN ACCORDANCE WITH THE MANUFACTURER RECOMMENDATIONS. AS THE BAG FILLS WITHIN SEDIMENT, REDUCE THE PUMP RATE. 7. REPLACE THE SILT BAG WHEN ONE HALF (1/2) FULL OF SEDIMENT. 8. SILT BAG DEVICE MUST -BE > 50FT FROM THE TOP OF THE STREAM BANK AND WATER MUST BE DISCHARGED IN A DIFFUSE MANNER. SILT BAG NOT TO SCALE RMUDRAfORNUP 8522-204 SIX FORKS ROAD RALEIGH, NORTH CAROLINA 27615 919.845.7600 PHONE 919.845.7703 FAX ENGR. FIRM LICENSE #F-0843 I SSIJ ED: 16 MAR 2020 REVISIONS: 10 30 SEP 2020 PER NCDEQ COMMENTS DRAWN BY: MLS CHECKED BY: MLS PROJECT: WSRDUQ DETAILS DWG. NO. SITE 10 NOTES: 1. TEMPORARY DIVERSION DITCH TO BE USED TO INTERCEPT FLOW AND/OR DIVERT TO A SEDIMENT CONTROL MEASURE OR BMP. 2. SILT SHALL BE REMOVED WHEN DITCH IS ONE-HALF FULL. 3. DTCH SHALL BE RECONSTRUCTED WHEN DAMAGED BY EQUIPMENT OR COVERED BY FILL. 4. STABILIZE DIVERSION DITCH BERM WITH LINER AS SPECIFIED IN THE CHART BELOW. 2' MIN. WASTE MATERIAL -COMPACT, VARSEED & MULCH AFTER . -I S�OpF 2' - CONSTRUCTION OF DITCH III''1= 2. WIDTH PER-] �-III-III-I I-III-� I I III -I M�k HART BELOW tit I I I I II III -III -III -III -III -I -III_ = I -I DEPTH PER -III=I1' CHART BELOW CROSS SECTIONAL VIEW STANDARD TEMPORARY DIVERSION DITCH Excavate channel to design Overlap 6" min. grade and cross-section Design depth Lonor urinal k anchor trench Overcut channel 2" to allow bulkin during seedbed preparation Intermittent check slot Shingle -lap spliced ends or begin new roll in an int Prepare soil and app installing blankets, temporary channe Typical installation with erosion control blankets or turf r reinforcement mats 6" Longitudinal anchor trench NOTES: 1. Design velocities exceeding 2 ft/sec require temporary blankets, mats or similar liners to protect seed and soil until vegetation becomes established. 2, Grass -lined channels with design velocities exceeding 6 ft/sec should include turf reinforcement Yeats TEMPORARY DIVERSION DITCH DIMENSIONS WIDTH DEPTH(FT) DIVERSION # (FT) LINER 1A 3 2 STRAW WITH NETTING 1B 7 2,50 STRAW WITH NETTING 2 (WHERE STRAW LINER 3 2 STRAW WITH NETTING IS REQUIRED) 2 (WHERE RIP RAP LINER 4 2 RIP RAP (D50=21") IS REQUIRED) 3 2 1 STRAW WITH NETTING 4 (WHERE STRAW LINER 2 2 STRAW WITH NETTING IS REQUIRED) 4 (WHERE RIP RAP LINER 3 1 RIP RAP (D50=12") IS REQUIRED) 5 (WHERE STRAW LINER 2 1 STRAW WITH NETTING IS REQUIRED) 5 (WHERE RIP RAP LINER 3 1 STRAW WITH NETTING IS REQUIRED) 6A (WHERE STRAW LINER 2 1 STRAW WITH NETTING IS REQUIRED) 6A (WHERE RIP RAP LINER 4 1 RIP RAP (D50=12") IS REQUIRED) 6B (WHERE STRAW LINER 2 2 STRAW WITH NETTING IS REQUIRED) 6B (WHERE RIP RAP LINER 3 1 RIP RAP (D50=12') IS REQUIRED) 7 2 1 STRAW WITH NETTING 8 2 1 STRAW WITH NETTING 9 2 1 STRAW WITH NETTING CONSTRUCTION SPECIFICATIONS NSTALLATION IN CHANNELS- EXCAVATE TERMINAL TRENCHES (12 INCHES DEEP AND 6 INCHES WIDE) ACROSS THE CHANNEL AT THE UPPER AND LOWER END OF THE LINED CHANNEL SECTIONS. AT 25-FOOT INTERVALS ALONG THE CHANNEL, ANCHOR THE RECP ACROSS THE CHANNEL EITHER IN 6 INCH BY 6 INCH TRENCHES OR BY INSTALLING TWO CLOSELY SPACED ROWS OF ANCHORS. EXCAVATE LONGITUDINAL TRENCHES 6 INCHES DEEP AND WIDE ALONG CHANNEL EDGES (ABOVE WATER LINE)IN WHICH TO BURY THE OUTSIDE RECP EDGES. PLACE THE FIRST RECP AT THE DOWNSTREAM END OF THE CHANNEL. PLACE THE END OF THE FIRST RECP IN THE TERMINAL TRENCH AND PIN IT AT 1 FOOT INTERVALS ALONG THE BOTTOM OF THE TRENCH. NOTE: THE RECP SHOULD BE PLACED UPSIDE DOWN IN THE TRENCH WITH THE ROLL ON THE DOWNSTREAM SIDE OF THE BENCH. ONCE PINNED AND BACKFILLED, THE RECP IS DEPLOYED BY WRAPPING OVER THE TOP OF THE TRENCH AND UNROLLING UPSTREAM. IF THE CHANNEL IS WIDER THAN THE PROVIDED ROLLS, PLACE ENDS OF ADJACENT ROLLS IN THE TERMINAL TRENCH, OVERLAPPING THE ADJACENT ROLLS A MINIMUM OF 3 INCHES. PIN AT 1 FOOT INTERVALS, BACKFILL, AND COMPACT. UNROLL THE RECP IN THE UPSTREAM DIRECTION UNTIL REACHING THE FIRST INTERMITTENT TRENCH. FOLD THE RECP BACK OVER ITSELF, POSITIONING THE ROLL ON THE DOWNSTREAM SIDE OF THE TRENCH, AND ALLOWING THE MAT TO CONFORM TO THE TRENCH. THEN PIN THE RECP (TWO LAYERS) TO THE BOTTOM OF THE TRENCH, BACKFILL, AND COMPACT. CONTINUE UP THE CHANNEL (WRAPPING OVER THE TOP OF THE INTERMITTENT trench) REPEATING THIS STEP AT OTHER INTERMITTENT TRENCHES, UNTIL REACHING THE UPPER TERMINAL TRENCH. AT THE UPPER TERMINAL TRENCH, ALLOW THE RECP TO CONFORM TO THE TRENCH, SECURE WITH PINS OR STAPLES, BACKFILL, COMPACT AND THEN BRING THE MAT BACK OVER THE TOP OF THE TRENCH AND ONTO THE EXISTING MAT (2 TO 3 FEET OVERLAP IN THE DOWNSTREAM DIRECTION), AND PIN AT 1 FOOT INTERVALS ACROSS THE RECP. WHEN STARTING INSTALLATION OF A NEW ROLL, BEGIN IN A TRENCH OR SHINGLE -LAP ENDS OF ROLLS A MINIMUM OF 1 FOOT WITH UPSTREAM RECP ON TOP TO PREVENT UPLIFTING. PLACE THE OUTSIDE EDGES OF THE RECP(S) IN LONGITUDINAL TRENCHES, PIN, BACKFILL, AND COMPACT. Contents 100%Wheat Straw Letting Single Polypropylene (rapid photodegradable) Thread Nylon Photodegradable ---------------- Standard Width 8 feet / 2.44 meters (actual 8' width) Standard Length 113 feet/ 34.44 meters Area 100 yd' / 83.6 rn' Weight (Approx) 52 lbs./ 23.6 kg (0.53 lbs./ydl) Life Medium Term, Approx.3 Months Best Use 3:1 or Less Low Flow Roadside Use Thread Spacing 11/2 inches MAINTENANCE REQUIREMENTS: 1. INSPECT ROLLED EROSION CONTROL PRODUCTS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (1/2 INCH OR GREATER) RAIN FALL EVENT REPAIR IMMEDIATELY. 2. GOOD CONTACT WITH THE GROUND MUST BE MAINTAINED, AND EROSION MUST NOT OCCUR BENEATH THE RECP. 3. ANY AREAS OF THE RECP THAT ARE DAMAGED OR NOT IN CLOSE CONTACT WITH THE GROUND SHALL BE REPAIRED AND STAPLED. 4. IF EROSION OCCURS DUE TO POORLY CONTROLLED DRAINAGE, THE PROBLEM SHALL BE FIXED AND THE ERODED AREA PROTECTED. 5. MONITOR AND REPAIR THE RECP AS NECESSARY UNTIL GROUND COVER IS ESTABLISHED TEMPORARY DIVERSION DITCH AND LINER DETAILS W1 (3 TIMES I.D.) NOTES: 1. L = THE LENGTH OF THE RIPRAP APRON. 2. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER BUT NOT LESS THAN 6" (INCHES). 3. A FILTER BLANKET OR FILTER FABRIC SHOULD BE INSTALLED BETWEEN THE RIPRAP W2 AND SOIL FOUNDATION. PLAN V It W FABRIC SECTION 'A -A' STANDARD PIPE OUTLET ENERGY DISSIPATER CONSTRUCTION SPECIFICATIONS 1. ENSURE THAT THE SUBGRADE FOR THE FILTER AND RIPRAP FOLLOWS THE REQUIRED LINES AND GRADES SHOWN IN THE PLAN. COMPACT ANY FILL REQUIRED IN THE SUBGRADE TO THE DENSITY OF THE SURROUNDING UNDISTURBED MATERIAL. LOW AREAS IN THE SUBGRADE ON UNDISTURBED SOIL MAY ALSO BE FILLED BY INCREASING THE RIPRAP THICKNESS. 2. THE RIPRAP AND GRAVEL FILTER MUST CONFORM TO THE SPECIFIED GRADING LIMITS SHOWN ON THE PLANS. 3. FILTER CLOTH, WHEN USED, MUST MEET DESIGN REQUIREMENTS AND BE PROPERLY PROTECTED FROM PUNCHING OR TEARING DURING INSTALLATION. REPAIR ANY DAMAGE BY REMOVING THE RIPRAP AND PLACING ANOTHER PIECE OF FILTER CLOTH OVER THE DAMAGED AREA. ALL CONNECTING JOINTS SHOULD OVERLAP SO THE TOP LAYER IS ABOVE THE DOWNSTREAM LAYER A MINIMUM OF 1 FOOT. IF THE DAMAGE IS EXTENSIVE, REPLACE THE ENTIRE FILTER CLOTH. 4. RIPRAP MAY BE PLACED BY EQUIPMENT, BUT TAKE CARE TO AVOID DAMAGING THE FILTER. 5. THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE 1.5 TIMES THE MAXIMUM STONE DIAMETER. 6. RIPRAP MAY BE FIELD STONE OR ROUGH QUARRY STONE. IT SHOULD BE HARD, ANGULAR, HIGHLY WEATHER -RESISTANT AND WELL GRADED. 7. CONSTRUCT THE APRON ON ZERO GRADE WITH NO OVERFILL AT THE END. MAKE THE TOP OF THE RIPRAP AT THE DOWNSTREAM END LEVEL WITH THE RECEIVING AREA OR SLIGHTLY BELOW IT. 8. ENSURE THAT THE APRON IS PROPERLY ALIGNED WITH THE RECEIVING STREAM AND PREFERABLY STRAIGHT THROUGHOUT ITS LENGTH. IF A CURVE IS NEEDED TO FIT SITE CONDITIONS, PLACE IT IN THE UPPER SECTION OF THE APRON. 9. IMMEDIATELY AFTER CONSTRUCTION,STABILIZE ALL DISTURBED AREAS WITH VEGETATION MAINTENANCE REQUIREMENTS: INSPECT RIPRAP OUTLET STRUCTURES WEEKLY AND AFTER SIGNIFICANT (1/2 INCH OR GREATER) RAINFALL EVENTS TO SEE IF ANY EROSION AROUND OR BELOW THE RIPRAP HAS TAKEN PLACE, OR IF STONES HAVE BEEN DISLODGED. IMMEDIATELY MAKE ALL NEEDED REPAIRS TO PREVENT FURTHER DAMAGE. LOCATION VELOCITY (fps) DESIGN STORM Q (Cfs) OUTLET PIPE DIAMETER (in) d50 (in) L APRON LENGTH (ft) W1 APRON WIDTH AT PIPE OUTLET (ft) W2 APRON WIDTH AT OUTLET END (ft) MAXIMUM STONE DIAMETER (in) d APRON THICKNESS (in) outlet of slope drain into basin #1 13.2 10 YR 20.58 30.00 12.00 15.00 7.5 17.5 18.00 27.00 outlet of slope drain into basin #2 11.4 10 YR 20.58 24.00 10.00 12.00 6.0 14.0 15.00 22.50 outlet of slope drain into basin #3 13.2 25 YR 23.75 30.00 12.00 15.00 7.5 17.5 18.00 27.00 outlet of slope drain into basin #3 8.3 25 YR 4.50 15.00 6.00 8.00 3.8 9.3 9.00 13.50 outlet of slope drain into basin #4 11.4 25 YR 43.00 (2)24 10.00 15.00 12.0 18.0 15.00 22.50 outlet of slope drain into basin #5 8.3 10 YR 0.36 15.00 6.00 6.00 3.8 7.3 9.00 13.50 outlet of slope drain into basin #6 8.3 10 YR 0.36 15.00 6.00 6.00 3.8 7.3 9.00 13.50 outlet of slope drain into basin #7 8.3 10 YR 1.08 15.00 6.00 6.00 3.8 7.3 9.00 13.50 Pipe #1 (permanent pipe under berm) 8.3 10 YR 1.81 15.00 6.00 6.00 3.8 7.3 9.00 13.50 Pipe #2 (permanent pipe under berm) 8.3 10 YR 2.53 15.00 6.00 6.00 3.8 7.3 9.00 13.50 ENERGY DISSIPATER DETAILS 8522-204 SIX FORKS ROAD RALEIGH, NORTH CAROLINA 27615 919.845.7600 PHONE 919.845.7703 FAX ENGR. FIRM LICENSE #F-0843 Q z QO O Z XYU QO wCy cr) LU Z UO WQ }Z 0 Q CD W= Z W LU 0 Q W Q J OC 0 j Q OC O oC I SSU ED: 16 MAR 2020 REV I SI ON S: 0 30 SEP 2020 PER NCDEQ COMMENTS DRAWN BY: MILS CHECKED BY: MILS PROJECT: WSRDUQ DETAILS DWG. NO. SITE 11 STEEL POSTS (QUANTITY VAR.) PLASTIC SLOPE DRAIN PIPE (PRACTICE STANDARD 6.32) OR GEOTEXTILE LINING TEMPORARY OR . PERMANENT DITCH COIR FIBER BAFFLES - (PRACTICE STANDARD 6.65) PLAN VIEW RISER STRUCTURE TRASH RACK SKIMMER I�♦IEV3• �i11f1 CLASS B STONE PAD (4' X 4' X V MIN.) ANTIFLOTATION BLOCK 4' x 4' x 12" THICK MINIMUM SKIMMER (SIZE VAR.) V STONE PAD (below skimmer) TOP OF EMBANKMENT 1' MIN. FREEBOARD - V MIN, SECTIONAL VIEW RISER STRUCTURE EMBANKMENT i STONE ENERGY DISSIPATOR ROPE EMERGENCY SPILLWAY WOOD STAKE OR METAL POST CUT-OFF ANTI -SEEP TRENCH COLLAR 2' DEEP 1.1 EMERGENCY SPILLWAY LINE SPILLWAY WITH CLASS B RIP RAP FOR THE ENTIRE WIDTH OF THE SPILLWAY, AND ALONG THE ENTIRE INTERIOR AND EXTERIOR SLOPE. PROVIDE AN IMPERMEABLE TARP UNDER THE EXTENTS OF THE RIP RAP AREA. NOTES 1. SEED AND PLACE MATTING FOR EROSION CONTROL ON INTERIOR AND EXTERIOR SiDESLOPES. 2. INSTALL A MINIMUM OF 3 COIR FIBER BAFFLES IN ACCORDANCE WITH PRACTICE STANDARD 6.65. 3. INSTALL SKIMMER AND COUPLING TO RISER STRUCTURE OR DIRECTLY INTO EMBANKMENT 1 FT. FROM BOTTOM OF BASIN. 4. THE ARM PIPE SHALL HAVE A MINIMUM LENGTH OF 6 FT. BETWEEN THE SKIMMER AND COUPLING. BARREL PIPE STABILIZED OUTLET NOT TO SCALE CONSTRUCTION SPECIFICATIONS 1. Site preparations- Clear, grub, and strip topsoil from areas under the embankment to remove trees, vegetation, roots, and other objectionable material. Delay clearing the pool area until the dam is complete and then remove brush, trees, and other objectionable materials to facilitate sediment cleanout. Stockpile all topsoil or soil containing organic matter for use on the outer shell of the embankment to facilitate vegetative establishment. Place temporary sediment control measures below the basin as needed. 2. Cut-off trench- Excavate a cut-off trench along the center line of the earth fill embankment. Cut the trench to stable soil material, but in no case make it less than 2 feet deep. The cut-off trench must extend into both abutments to at least the elevation of the riser crest. Make the minimum bottom width wide enough to permit operation of excavation and compaction equipment, but in no case less than 2 feet. Make side slopes of the trench no steeper than 1: 1. Compaction requirements are the same as those for the embankment. Keep the trench dry during backfilling and compaction operations. Place a minimum depth of 2 feet of compacted backfill over the pipe spillway before crossing it with construction equipment. Anchor the riser in place by concrete or other satisfactory means to prevent flotation. In no case should the pipe conduit be installed by cutting a trench through the dam after the embankment is complete. 5. Emergency spillway- Install the emergency spillway in undisturbed soil. The achievement of planned elevations, grade, design width, and entrance and exit channel slopes are critical to the successful operation of the emergency spillway. 6. Inlets- Discharge water into the basin in a manner to prevent erosion. Use diversions with outlet protection to divert sediment -laden water to the upper end of the pool area to improve basin trap efficiency (References: Runoff Control Measures and Outlet Protection). 7. Erosion control- Construct the structure so that the disturbed area is minimized. Divert surface water away from bare areas. Complete the 3. Embankment- Take fill material from the approved areas shown on the plans. embankment before the area is cleared. Stabilize the emergency spillway It should be clean mineral soil, free of roots, woody vegetation, rocks, and other embankment and all other disturbed areas above the crest of the principal objectionable material. Scarify areas on which fill is to be placed before placing fill. spillway immediately after construction (References: Surface Stabilization). The fill material must contain sufficient moisture so it can be formed by hand into a ball without crumbling. If water can be squeezed out of the ball, it is too 8. Install porous baffles as specified in Practice 6,65, Porous Baffles, wet for proper compaction. Place fill material in 6 to S inch continuous layers over the entire length of the fill area and compact it. Compaction may be obtained by routing the construction hauling equipment over the fill so that the entire surface of each layer is traversed by at least one wheel or tread track of heavy equipment, or a compactor may be used. Construct the embankment to an elevation 10 percent higher than the design height to allow for settling. 4. Conduit spillways- Securely attach the riser to the barrel or barrel stub to make a watertight structural connection. Secure all connections between barrel sections by approved watertight assemblies. Place the barrel and riser on a firm, smooth foundation of impervious soil. Do not use pervious material such as sand, gravel, or crushed stone as backfill around the pipe or anti -seep collars. Place the fill material around the pipe spillway in 4-inch layers, and compact it under and around the pipe to at least the same density as the adjacent embankment. Care must be taken not to raise the pipe from firm contact with its foundation when compacting under the pipe haunches. 9. Safety- Sediment basins may attract children and can be dangerous. Avoid steep side slopes, and fence and mark basins with warning signs if trespassing is likely. Follow all state and local requirements. MAINTENANCE REQUIREMENTS: Inspect temporary sedirricut basins at least weekly and alter each significant (112 inch or greater) rainfall event and repair immediately. Remove sediment and restore the basin to its original dimensions when it accumulates to one-half the design depth. Place removed sediment in an area with sediment controls. If maintenance or removal of basin requires dewatering, water will either be pumped through silt bags as detailed or pumped to one or both quarry pits. 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. BASIN DA C DESIGN INTENSITY TIME OF Q REQUIRED REQUIRED MIN MIN DEPTH PROVIDED PROVIDED SIDE DAM DAM EMERGENCY BARRELL BARRELL SKIMMER SKIMMER DEWATERING STORM CONCENTRATION SA VOLUME L W SA VOLUME SLOPES HEIGHT WIDTH SPILLWAY DIAMETER LENGTH SIZE ORIFICE TIME WIDTH TYPE (Acres) ("/hr) (min) (cfs) (sf) (cf) (ft) (ft) (ft) (sf) (cf) (ft) (ft) (ft) (in) (ft) (in) (in) (days) 4 40.0 0.50 25-yr 8.19 5.00 163.80 71,253 72,000 SEE PLAN 2 72,685 137,511 2.5:1 5 18 85 36 60.00 5.00 4.30 3 RISER BASIN F' x 1' THICK B STONE PAD SKIMMER 18' MIN TOP OF DAM TARP PROTECTION DITCH AND BURY TARP EDGE (MIN. 12') o' MIN (IMPERMEABLE LINER) WEIR LENGTH CY SECTI❑N THRU WEIR �Y YYVVU JIMRG VR METAL POST 1' MIN FREEBOARD TOP OF BERM BAFFLES (STD) INFLOW RUCTURE / /�xSKIMMER EMERGENCY SPILLWAY - ELEVATION DEWZONEATERIN I DISSIPATER PAD RIP RAP INLET SHALL BE CMP OUTLET PI PROTECTED (AS NEEDED) CROSS SECTION FROM ER❑SI❑N WITH RIPRAP, TARP, MATTING OR EQUIVALENT, NOTES: 1) BASIN SHOULD BE CLEANED OUT WHEN CAPACITY REACHES AN ELEVATION REPRESENTING THAT THE BASIN IS HALF -FULL. 2) THE TARP USED TO PROTECT THE WEIR SHALL BE THE WIDTH SPECIFIED. THE LENGTH OF THE TARP SHALL BE ACCORDING TO AVAILABLE SUPPLY. IF MULTIPLE TARPS ARE TO BE USED, THEN TARPS SHALL BE OVERLAPPED AT LEAST 12". THE UPSTREAM 12" TARP SHALL OVERLAP THE DOWNSTREAM TARP. THE TARP SHALL BE 50 MIL. HEAVY DUTY SILVER TARPAULINS OR EQUIVALENT FOR U.V. RESISTANCE. 3) PROVIDE A MINIMUM OF THREE POROUS BAFFLES TO EVENLY DISTRIBUTE FLOW ACROSS THE BASIN, REDUCING TURBULENCE. 4) BAFFLE MATERIAL MUST BE SECURED AT THE BOTTOM AND SIDES USING STAPLES OR BY TRENCHING AS FOR A SILT FENCE. 5) MOST OF THE SEDIMENT WILL ACCUMULATE IN THE FIRST BAY, SO THIS SHOULD BE READILY AVAILABLE FOR MAINTENANCE. 6) DURING THE CONSTRUCTION PHASE OF THE PROJECT, PERMANENT STORMWATER RISER SHALL ONLY DEWATER FROM THE TOP OF 7) POND SHALL NOT BE CONVERTED FOR STORMWATER USE UNTIL APPROVED BY ENVIRONMENTAL ENGINEER. STANDARD SKIMMER BASIN OUTLET END, CONNECTION TO OUTLET PIPE OR RISER SKIMMER BASIN DETAIL RISER BASIN DESIGN DATA STANDARD SKIMMER DETAIL DOOR 4T CONSTRUCTION SPECIFICATIONS 1. Clear, grub, and strip the area under the embankment of all vegetation and root mat. Remove all surface soil containing high amounts of organic matter and stockpile or dispose of it properly. Haul all objectionable material to the designated disposal area. Place temporary sediment control measures below basin as needed 2. Ensure that fill material for the embankment is free of roots, woody vegetation, organic matter, and other objectionable material. Place the fill in lifts not to exceed 9 inches, and machine compact it. Over fill the embankment 6 inches to allow for settlement. 3. Shape the basin to the specified dimensions. Prevent the skimming device from settling into the mud by excavating a shallow pit under the skimmer or providing a low support under the skimmer of stone or timber. 4. Place the barrel (typically 4-inch Schedule 40 PVC pipe) on a firm, smooth foundation of impervious soil. Do not use pervious material such as sand, gravel, or crushed stone as backfill around the pipe. Place the fill material around the pipe spillway in 4-inch layers and compact it under and around the pipe to at least the same density as the adjacent embankment. Care must be taken not to raise the pipe from the firm contact with its foundation when compacting under the pipe haunches. Place a minimum depth of 2 feet of compacted backfill over the pipe spillway before crossing it with construction equipment. In no case should the pipe conduit be installed by cutting a trench through the dam after the embankment is complete. 5. Assemble the skimmer following the manufacturers instructions, or as designed. 6. Lay the assembled skimmer on the bottom of the basin with the flexible joint at the inlet of the barrel pipe. Attach the flexible joint to the barrel pipe and position the skimmer over the excavated pit or support. Be sure to attach a rope to the skimmer and anchor it to the side of the basin. This will be used to pull the skimmer to the side for maintenance. 7. Earthen spillways Install the spillway in undisturbed soil to the greatest extent possible. The achievement of planned elevations, grade, design width, and entrance and exit channel slopes are critical to the successful operation of the spillway. The spillway should be lined with laminated plastic or impermeable geotextile fabric. The fabric must be wide and long enough to cover the bottom and sides and extend onto the top of the dam for anchoring in a trench. The edges may be secured with 8-inch staples or pins. The fabric must be long enough to extend down the slope and exit onto stable ground. The width of the fabric must be one piece, not joined or spliced, otherwise water can get under the fabric. If the length of the fabric is insufficient for the entire length of the spillway, multiple sections, spanning the complete width, may be used. The upper section(s) should overlap the lower section(s) so that water cannot flow under the fabric. Secure the upper edge and sides of the fabric in a trench with staples or pins. (Adapted from "A Manual for Designing, Installing and Maintaining Skimmer Sediment Basins." February, 1999. J. W. Faircloth & Son.). S. Inlets -Discharge water into the basin in a manner to prevent erosion. Use temporary slope drains or diversions with outlet protection to divert sediment - laden water to the upper end of the pool area to improve basin trap efficiency (References: Runoff Control Measures and Outlet Protection). 9. Erosion control -Construct the structure so that the disturbed area is minimized. Divert surface water away from bare areas. Complete the embankment before the area is cleared. Stabilize the emergency spillway embankment and all other disturbed areas above the crest of the principal spillway immediately after construction (References: Surface Stabilization). 10. Install porous baffles as specified in Practice 6.65, Porous Baffles. 11. After all the sediment -producing areas have been permanently stabilized, remove the structure and all the unstable sediment. Smooth the area to blend with the adjoining areas and stabilize properly (References: Surface Stabilization). MAINTENANCE REQUIREMENTS: Inspect skimmer sediment basins at least weekly and after each significant (one-half inch or greater) rainfall event and repair immediately. Remove sediment and restore the basin to its original dimensions when sediment accumulates to one-half the height of the first baffle, Pull the skimmer to one side so that the sediment underneath it can be excavated. Excavate the sediment from the entire basin, not just around the skimmer or the first cell. Make sure vegetation growing in the bottom of the basin does not hold down the skimmer. If maintenance or removal of basin requires dewatering, water will either be pumped through silt bags as detailed or pumped to one or both quarry pits. Repair the baffles if they are damaged. Re -anchor the baffles if water is flowing underneath or around them. If the skimmer is clogged with trash and there is water in the basin, usually jerking on the rope will make the skimmer bob up and down and dislodge the debris and restore flow. If this does not work, pull the skimmer over to the side of the basin and remove the debris. Also check the orifice inside the skimmer to see if it is clogged; if so remove the debris. If the skimmer arm or barrel pipe is clogged, the orifice can be removed and the obstruction cleared with a plumber's snake or by flushing with water. Be sure and replace the orifice before repositioning the skimmer. Check the fabric lined spillway for damage and make any required repairs with fabric that spans the full width of the spillway. 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 skimmer and pool areas. Freezing weather can result in ice forming in the basin. Some special precautions should be taken in the winter to prevent the skimmer from plugging with ice. BASIN DA (Acres) C DESIGN STORM INTENSITY ("/hr) TIME OF CONCENTRATION (min) Q (cfs) REQUIRED SA (sf) REQUIRED VOLUME (cf) MIN L (ft) MIN W (ft) DEPTH (ft) PROVIDED SA (sf) PROVIDED VOLUME (cf) SIDE SLOPES DAM HEIGHT (ft) DAM WIDTH (ft) EMERGENCY SPILLWAY WIDTH (ft) SKIMMER SIZE (in) SKIMMER ORIFICE (in) DEWATERING TIME (days) TYPE 1 5.7 0.50 10-yr 7.22 5.00 20.58 61688 10,260 120 60 2 71114 12,882 2:1 4 5 20 2.50 1.90 3 SKIMMER SEDIMENT BASIN 2 5.7 0.50 10-yr 7.22 5.00 20.58 61688 10,260 120 60 2 71114 12,882 2:1 4 5 20 2.50 1.90 3 SKIMMER SEDIMENT BASIN 3 8.0 0.50 25-yr 8.19 5.00 32.76 10,647 141400 155 70 2 10,764 19,874 2:1 4 5 13 2.50 2.20 3 SKIMMER SEDIMENT BASIN 5 0.8 0.50 10-yr 7.22 5.00 2.89 939 11440 46 29 2 11334 21084 2:1 4 5 10 1.50 0.80 3 SKIMMER SEDIMENT BASIN 6 1.3 0.50 10-yr 7.22 5.00 4.69 11525 2340 77 28 2 21067 3388 2:1 4 5 10 1.50 1.00 3 SKIMMER SEDIMENT BASIN 7 1.7 0.50 10-yr 7.22 5.00 6.14 11995 31060 77 36 2 21683 41582 2:1 4 5 10 1.50 1.20 3 SKIMMER SEDIMENT BASIN RMOTABIRNUP 8522-204 SIX FORKS ROAD RALEIGH, NORTH CAROLINA 27615 919.845.7600 PHONE 919.845.7703 FAX ENGR. FIRM LICENSE #F-0843 , C A RO ��ff +� . • 7 0308 L Q Z J } QO 0 Q Z YU QO w= Cy UJ Z UO WQ }Z J Q CD Ws Z W W C� Q� W Q J OC 0 J Q OC O oC I SSU ED: 16 MAR 2020 REV I SI ON S: 10 30 SEP 2020 PER NCDEQ COMMENTS DRAWN BY: MILS CHECKED BY: MLS PROJECT: WSRDUQ DETAILS SKIMMER SEDIMENT BASIN DESIGN DATA