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Home My WebLink About7._11526_GOLD_HILL_MINMOD_DETAIL_SHEET_7_r1 4' MAX. `A\ BETWEEN POSTS BAFFLE (TYP.) C� ALTERNATE CONSTRUCTION NOTE: CONSTRUCT AN ACCESS PIER WITH HANDRAILS 9-GAUGE MINIMUM HIGH EARTH BERM NOTES, TO PROVIDE ACCESS TO THE RISER FOR SAMPLING. DESIGN TO BE PROVIDED BY TENSION WIRE STRAND 8 MAX. STANDARD STRENGTH FABRIC WITH WIRE FENCE OTHERS. C' T❑ PREVENT SAGGING APRON. ATTACHED TO STEEL POSTS 1. La IS THE LENGTH OF THE RIPRAP 6' MAX. EXTRA STRENGTH FABRIC WITHOUT WIRE FENCE 'ELEV.PIPE PRINCIPAL A A 2. T = 1.5 TIMES THE MAXIMUM SPILLWAY ( INSTALL A CMP TRASH AND 1 --------- STONE DIAMETER BUT NOT LESS SKIMMER AT THE SAME ANTI-V❑RTEX DEVICE ELEVATION AS THE (SEE DETAIL) 5' STEEL I 3d d W THAN 6' 10' MIN' POST I o 0 3. IN A WELL DEFINED CHANNEL EX- EL X 2' PVC SEDIMENT CLEANOUT BARREL INVERT / S, --------- BANKSTHTOAPANNELEVATION P THE HOFN6' REFERENCE STAKE. ! I ABOVE THE MAXIMUM TAILWATER MARK SEDIMENT CLEANOUT ELEV. 'B' DEPTH OR TO THE TOP OF THE DEPTH ❑N STAKE. 2' S =III=III=III=III=I 18-24 HANK, WHICHEVER IS LESS. 1 -I I-III-III-III-I I-I FA I RCL❑TH SKIMMER MAXIMUM LEVEL OF I=III=III=III=III=III=III=I IT EMBANKMENT STABILIZED I PLAN OR EQUAL r --� SEDIMENT C❑LLLECTED. I-I I-I I-III-III-III-I I-III-I I WITH VEGETATION 4� La CLEAN BASIN WHEN I I-III-I I-I I-I I-I I-I I-I I-III-III- �"A THIS LEVEL IS _- INLET ZONE I-I I III-III-III-III-III-III -III-III-III-III-III-I I III-I I I- I I-III-III-III-III-III-III-III-III-III-III- 2. 5 25% OF SURFACE AREA REACHED, - - - - - - =III.. III..-III.-III III III III III III III..-III.-III III.. I I III II IEI I IEI II-I I-I I-I I-I I-I I-III-I I IEI I I-I I I= 1 C❑I R EROSION ON BLANKET, _ _I 11=1 I I-1 I IEI I IEI I IEI I IEI I IEI I IEI I IEI I IEI I IEI I a I I�_ _ _ C❑IR MESH ( SIMILAR) = JII 11=111=111=111=111JIN =111=111=111= T IN =111=111=IIN=11N=11 " =II IEI I IEI I IEI I IEI I IEI I IEI I IEI I IEI I IEI I IEI I IEI II=III=III= DRAPED OVER WIRE STRAND FIRST CHAMBER P=1110,1 11� �II SIR11-111-111-111=111 24 MIN. 1ua11=1a=n1= =nN=nN=n1=u1=u1= WRAP FILTER FABRIC 8 LEX =I I I=I I I=1 I I=1 I I=1 I I=1 I I=1 I I=1 I I=1 I I=I I I=1 I I=1 I I=I I I=I I I=I I I= 25% OF SURFACE AREA III_111=111=111-u1 nl-u1-1�1_1�N a W HOSE =III=III=III=III=III=III=III=III=III=III=III=III=III=III=III=III=1 IIN_IIII=11111 IINmII11 II11�IINI IE1110I111111111111N1111 111111INl�l 111 DOWN AND T HE TRENCH D J AI_I I I_I I_I I_I I_I I_I I_I I I_I I I_I I I_I I I_I I I_I I I_I I I-III III I I I_I SECOND CHAMBER -rn FILTER FABRIC MIRAFI 60OX OR EQUAL 1EI I I=I I IEI I I=III=1 I IEl I IEl I IEl I IEI I I=III El I IEI I IEI I IEI I IEI I I=I I I=I I lEi I BAFFLE INSTALLATION - STEP 1 25% OF SURFACE AREA SECTION A-A 111EI11E I ° °_° ° INV. IN OUTLET PROTECTION _ OUTLET ZONE STEEL POST __ 25% OF SURFACE AREA CONSTRUCTION SPECIFICATIONS GENERAL NOTES: WOVEN WIRE FENCE ( IF USED) �I I�I-I�I- 1� 1 SLOPE �ANTI-SEEP INV. ❑UT POROUS BAFFLES -III=III III- -III-I I-III- COLLAR (SEE DETAIL) ELEV, 'A' II=III III=III: 1. ENSURE THAT THE SUBGRADE FOR THE FILTER AND RIPRAP FDLL❑WSFILTER FABRIC SELECT FILL PLACED SEE CHART PRINCIPAL SPILLWAY WOVEN WIRE FENCE SHALL BE A IN LAYERS AND C❑NPACTED FOR SIZE THE REQUIRED LINES AND GRADES SHOWN IN THE PLAN. COMPACT BARREL MINIMUM OF 32' HIGH AND SHALL ANY FILL REQUIRED IN THE SUBGRADE T❑ THE DENSITY ❑F THE � ANTI-FLOTATION 20 STABILIZED OUTLET PROTECTION C❑IR MESH PERSPECTIVE VIEW SURROUNDING UNDISTURBED MATERIAL, LOW AREAS I N THE SUBGRADE HAVE A MINIMUM OF 5 HORIZONTAL W -I PE ❑N UNDISTURBED SOIL MAY ALSO BE FILLED BY INCREASING THE WIRES, VERTICAL WIRES WITH 12' 30" BLOCK ❑RTWIREDWI�HR�IES RIPRAP THICKNESS. SPACING, MINIMUM 10 GAUGE TOP AND Z0, 1V BOTTOM WIRES, MINIMUM 12 112NOTES: GAUGE ALL OTHER WIRES.2. THE RIPRAP AND GRAVEL FILTER MUST C❑NF❑RM T❑ THE SPECIFIED GRADING LIMITS SHOWN ❑N THE PLANS.1. DRIVE 5' MINIMUM STEEL POSTS AT LEAST 24" INTO SOLID GROUND. TOP OF BAFFLES SHOULD BE FILTER FABRIC SHALL BE MIRAFI I2. ATTACH THE FABRIC TO THE SUPPORTING WIRE WITH ZIP TIES, WIRE 6" HIGHER THAN THE SPILLWAY 10OX FABRIC OR EQUIVALENT. OR STAPLES. INVERT AND 2" LOWER THAN 3. FILTER FABRIC, MUST MEET DESIGN REQUIREMENTS AND THE BASIN MAY ALSO BE DEWATERED BY PERF❑RATING THE RISER WITH 1/2-INCH HOLES WITH A 3. ATTACH THE FABRIC TO THE BOTTOM AND SIDES USING STAPLES. BE PROPERLY PROTECTED FROM PUNCHING ❑R TEARING DURING I-I I III III-III-III-III-III-III-I THE TOP OF THE BERM STEEL POSTS SHALL BE 5'-0' IN I 1-III-III-III.-III.-III-III- 4. SPACE THE BAFFLES ACCORDING TO THE APPROVED PLAN. INSTALLATION. REPAIR ANY DAMAGE BY REMOVING THE RIPRAP AND SPACING OF APPROXIMATELY 3 INCHES IN EACH OUTSIDE VALLEY, 5. THE FLOOR OF THE BASIN IN THE OUTLET ZONE AND BERMS SHOULD PLACING ANOTHER PIECE OF FILTER CLOTH OVER THE DAMAGED AREA. HEIGHT AND BE OF THE BE SEEDED IMMEDIATELY AFTER THE BASIN IS CONSTRUCTED ? ALL CONNECTING JOINTS SHOULD OVERLAP A MINIMUM ❑F 1 FT. IF SELF-FASTENER ANGLE STEEL TYPE. TRASH GUARD - INSTALL A TRASH GUARD ON THE TOP OF THE RISER TO PREVENT TRASH AND OTHER n THE DAMAGE IS EXTENSIVE, REPLACE THE ENTIRE FILTER CLOTH. WASHED STONE SHALL BE USED TO BURY DEBRIS FROM CLOGGING THE CONDUIT, FABRIC STAPLED TO SKIRT WHEN SIL T FENCE IS USED BOTTOM AND SIDES 4. RIPRAP MAY BE PLACED BY EQUIPMENT, BUT TAKE CARE TO AV❑ID ADJACENT TO A CHANNEL, CREEK OR POND. BACKFILL TRENCH WITH OR BURIED IN TRENCH DAMAGING THE FILTER, COMPACTED FILL OR USE GRAVEL TURN SILT FENCE UP SLOPE AT ENDS, WHEN SILT FENCE IS USED AS A CONSTRUCTION SPECIFICATIONS _ 5. THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE 1. 5 TIMES THE WATER CONVEYANCE e MAXIMUM STONE DIAMETER. REMOVE SEDIMENT WHEN 12 INCHES DEPTH 1. SITE PREPARATIONS - CLEAR, GRUB, AND STRIP TOPSOIL FROM AREAS UNDER THE C❑IR MESH STAPLED 6"x6" TRENCH, = OF SEDIMENT HAS ACCUMULATED. EMBANKMENT TO REMOVE TREES, VEGETATION, ROOTS, AND OTHER OBJECTIONABLE MATERIAL. ❑R TRENCHED INTO BACKFILLED AND = a 6. RIPRAP MAY BE FIELD STONE ❑R ROUGH QUARRY STONE. IT SHOULD BOTTOM AND SIDES COMPACTED = N BE HARD, ANGULAR, HIGHLY WEATHER-RESISTANT AND WELL GRADED, TO FACILITATE SEDIMENT CLEANOUT AND RESTORATION, CLEAR THE P❑❑L AREA OF ALL BRUSH, - TREES, AND OTHER OBJECTIONABLE MATERIALS. STOCKPILE ALL TOPSOIL OR S❑IL CONTAINING =� 7. CONSTRUCT THE APRON ON ZERO GRADE WITH NO ❑VERFALL AT THE ORGANIC MATTER FOR USE ON THE OUTER SHELL OF THE EMBANKMENT TO FACILITATE END. MAKE THE TOP OF THE RIPRAP AT THE DOWNSTREAM END LEVEL TEMPORARY SILTFENCE VEGETATIVE ESTABLISHMENT. BAFFLE INSTALLATION - STEP 2 WITH THE RECEIVING AREA OR SLIGHTLY BELOW IT. 2. CUT-OFF TRENCH - EXCAVATE A CUT-OFF TRENCH ALONG THE CENTERLINE OF THE EARTH FILL 8. ENSURE THAT THE APRON IS PROPERLY ALIGNED WITH THE RECEIVING EMBANKMENT. CUT THE TRENCH TO STABLE S❑IL MATERIAL, BUT IN NO CASE MAKE IT LESS STREAM AND PREFERABLY STRAIGHT THROUGHOUT ITS LENGTH. IF A THAN 2 FT DEEP. THE CUT-OFF TRENCH MUST EXTEND INTO BOTH ABUTMENTS TO AT LEAST THE POROUS BAFFLES CURVE IS NEEDED TO FIT SITE C❑NDITIONS, PLACE IT IN THE ELEVATION OF THE RISER CREST. MAKE THE MINIMUM BOTTOM WIDTH WIDE ENOUGH To PERMIT UPPER SECTION OF THE APRON. OPERATION OF EXCAVATION AND COMPACTION EQUIPMENT BUT IN NO CASE LESS THAN 2 FT, 9. IMMEDIATELY AFTER C❑NSTRUCTI❑N, STABILIZE ALL DISTURBED MAKE SIDE SLOPES OF THE TRENCH NO STEEPER THAN 1: 1. COMPACTION REQUIREMENTS ARE AREAS WITH VEGETATION. THE SAME AS THOSE FOR THE EMBANKMENT. KEEP THE TRENCH DRY DURING BACKFILLING AND BASIN FAIRCLOTH SKIMMER COMPACTION OPERATIONS. NO. SIZE ORIFICE DIA. ARM SIZE 3 STRANDS OF 4 PT. MAINTENANCE (IN) (IN) BARBED WIRE 3, EMBANKMENT - THE EMBANKMENT SHOULD BE CLEAN MINERAL S❑IL, FREE OF ROOTS, WOODY INSPECT RIPRAP OUTLET STRUCTURES AFTER HEAVY RAINS TO SEE IF ANY AT THE TIME A HIGH WALL BECOMES VEGETATION, ROCKS, AND OTHER OBJECTIONABLE MATERIAL. SCARIFY AREAS ON WHICH FILL IS RSB 12-1 6. 0 4. 5 8' x 5" dia. / EROSION AROUND OR BELOW THE RIPRAP HAS TAKEN PLACE OR IF STONES INACTIVE A 4' HIGH FENCE WITH TO BE PLACED BEFORE PLACING FILL. THE FILL MATERIAL MUST CONTAIN SUFFICIENT RSB 12-2 6. 0 6. 0 8' x 5" dia. / HAVE BEEN DISLODGED. IMMEDIATELY MAKE ALL NEEDED REPAIRS TO AT THE TIME THAT AN ACTIVE FACE 3 STRANDS OF BARBED WIRE SHALL MOISTURE SO IT CAN BE FORMED BY HAND INTO A BALL WITHOUT CRUMBLING. IF WATER CAN RSB 12-3 6. 0 6. 0 8' x 5" dia. PREVENT FURTHER DAMAGE. BECOMES A DEAD WALL, INFORMATION BE INSTALLED AT THE TOP OF THE 00 BE SQUEEZED OUT OF THE BALL, IT IS T❑❑ WET FOR PROPER COMPACTION. PLACE FILL RSB 12-4 4. 0 3. 0 8' x 3" dia. / WILL BE SUPPLIED IN SUPPORT OF OVERBURDEN SLOPE. 5 DIA. / THE DETERMINATION OF FINAL SLOPES MATERIAL IN 6 TO 8-INCH CONTINUOUS LAYERS OVER THE ENTIRE LENGTH OF THE FILL AREA RSB 12-5 5. 0 4. 5 8' x 4" dia. WOOD POST / N FOR UNCONSOLIDATED MATERIAL. AND THEN COMPACT I T. COMPACTION MAY BE OBTAINED BY ROUTING THE CONSTRUCTION RSB 20-1 4. 0 3. 5 8' x 3" dia. / N�Nc r7 HAULING EQUIPMENT OVER THE FILL S❑ THAT THE ENTIRE SURFACE OF EACH LAYER IS RSB 20-2 2. 5 2. 5 6' x 1.5" dia. oPEN�P Ry / / ' TRAVERSED BY AT LEAST ONE WHEEL OR TREAD TRACK OF THE HEAVY EQUIPMENT, OR A RSB 20-3 2. 5 2. 0 6' x 1.5" dia. , / / Location Pipe Length Width Use GRp�ND COMPACTOR MAY BE USED. CONSTRUCT THE EMBANKMENT TO AN ELEVATION 10% HIGHER THAN / / / Size SAFETY BENCHES THE DESIGN HEIGHT TO ALLOW FOR SETTLING. � 0 RSB 12-01 48 26 30 27" ❑F CLASS I I RIPRAP � � 20' TYP. 20' TYP. 4. CONDUIT SPILLWAYS - SECURELY ATTACH THE RISER TO THE BARREL OR BARREL STUB SE MAKE ST❑RAGE AREA CLEAN❑UT SEDIMENT SURFACE / / / _y'/� RSB 12-02 48 26 30 27' ❑F CLASS II RIPRAP A WATERTIGHT STRUCTURAL C❑NNECTIDN. SECURE ALL CONNECTIONS BETWEEN BARREL SECTIONS / RSB 12-03 48 26 30 27' OF CLASS II RIPRAP BY APPROVED WATERTIGHT ASSEMBLIES. PLACE THE BARREL AND RISER ON A FIRM, SMOOTH DEPTH STORAGE AREA '/*Y-y FOUNDATION OF IMPERVIOUS SOIL. D❑ NOT USE PERVIOUS MATERIAL SUCH AS SAND, GRAVEL, W1 L1 D1 W2 L2 D2 W3 L3 D3 (FT3) SQ FT i 'q/ II RSB 12-04 30 14 17 18" ❑F CLASS I RIPRAP OR CRUSHED STONE AS BACKF I LL AROUND THE PIPE OR ANTI-SEEP COLLARS. PLACE THE FILL 12 0 RSB 12-1 140. 0 308. 0 2. 0 148. 0 316. 0 5. 0 160. 0 328. 0 1. 2 89, 888. 0 46, 768. 0 `V�/�� I RSB 12-05 36 20 23 18' OF CLASS I RIPRAP TYP. MATERIAL AROUND THE PIPE SPILLWAY IN 4-INCH LAYERS AND COMPACT IT UNDER AND AROUND 4 `� P12-01 60 36 31 27' ❑F CLASS II RIPRAP RSB 12-2 128. 0 600. 0 2, 0 136. 0 608. 0 5. 0 148. 0 620. 0 1. 2 159, 488. 0 82, 688, 0 THE PIPE TO AT LEAST THE SAME DENSITY AS THE ADJACENT EMBANKMENT. CARE MUST BE 80' TYP. RSB 12-3 150. 0 306. 0 3, 0 162. 0 318. 0 6. 0 174. 0 330. 0 1. 8 146, 124. 0 51, 516, 0 41 TAKEN NOT TO RAISE THE PIPE FROM FIRM CONTACT WITH ITS FOUNDATION WHEN COMPACTING P12-02 36 14 17 18' OF CLASS I RIPRAP UNDER THE PIPE HAUNCHES. PLACE A MINIMUM DEPTH OF 2 FT OF HAND-COMPACTED BACKF I LL RSB 12-4 40. 0 180. 0 4. 0 56. 0 196. 0 10. 0 80. 0 220. 0 2. 4 36, 352. 0 10, 976. 0 OVER THE PIPE SPILLWAY BEFORE CROSSING I T WITH CONSTRUCTION EQUIPMENT. ANCHOR THE RSB 12-5 100. 0 188. 0 4. 0 116. 0 204. 0 8. 0 132. 0 220. 0 2. 4 84, 928. 0 23, 664. 0 ! 1 RSB 20-1 48 21 25 18' OF CLASS I RIPRAP RSB 20-1 100. 0 250. 0 2. 0 108. 0 258. 0 8. 5 VARIES VARIES 1. 2 52, 864. 0 27, 864. 0 I RSB 20-2 30 16 18. 5 18' ❑F CLASS I RIPRAP 30' TYP, RISER IN PLACE BY CONCRETE OR OTHER SATISFACTORY MEANS T❑ PREVENT FLOTATION, IN N❑ � 30' TYP. CASE SHOULD THE PIPE CONDUIT BE INSTALLED BY CUTTING A TRENCH THROUGH THE DAM AFTER RSB 20-2 60. 0 200. 0 1. 5 66. 0 206. 0 5. 0 VARIES VARIES 0. 9 19, 197. 0 13, 596. 0 v RSB 20-3 30 15 17. 5 18' OF CLASS I RIPRAP THE EMBANKMENT IS COMPLETE. RSB 20-3 45. 0 200. 0 1. 5 51. 0 206. 0 5. 5 VARIES VARIES 0. 9 14, 629. 5 10, 506. 0 1A (MA P 20-8 30 14 16. 5 18' OF CLASS I RIPRAP 5. SKIMMER - SHAPE THE BASIN TO THE SPECIFIED DIMENSIONS, PREVENT THE SKIMMING P 20-2 42 23 26. 5 18' OF CLASS I RIPRAP DEVICE FROM SETTLING INTO THE MUD BY EXCAVATING A SHALLOW PIT UNDER THE BASIN RISER BARREL BARREL BARREL BARREL ANTI-FLOTATION BLOCK ELEV. ELEV. ELEV. P 20-5 42 23 26. 5 18' OF CLASS I RIPRAP SKIMMER OR PROVIDING A LOW SUPPORT UNDER THE SKIMMER OF STONE OR TIMBER, NO. DIA. in DIA. in LENGTH ft INV. IN INV. OUT WIDTH ft LENGTH ft DEPTH ft "A" "B" "C" RSB 12-1 72 CMP 48 CMP 45 701.5 701.0 8.0 11.0 3.0 702.0 707.5 710.0 SKIMMER HORIZONTAL MOVEMENT I S T❑ BE LIMITED BY METAL STAKES ❑R 2x4' s, RSB 12-2 72 CMP 48 CMP 45 692.5 692.0 8.0 1 1.0 3.0 693.0 698.5 700.0 80' TYP, INSTALL SKIMMER PER MANUFACTURER' S RECOMMENDATIONS, ASSEMBLE THE SKIMMER FOLL❑WING THE MANUFACTURERS INSTRUCTIONS, OR AS DESIGNED, 6, LAY THE RSB 12-3 72 CMP 48 CMP 102 697.0 694.0 8.0 11.0 3.0 700.0 703.0 706.0 ASSEMBLED SKIMMER ON THE BOTTOM OF THE BASIN WITH THE FLEXIBLE JOINT AT THE RSB 12-4 42 CMP 30 (CMP) 90 720.0 717.0 6.0 10.0 2.0 720.0 724.0 730.0 BARBED WIRE FENCE D E T A I L INLET OF THE BARREL PIPE. ATTACH THE FLEXIBLE JOINT TO THE BARREL PIPE AND RSB 12-5 48 CMP 36 CMP 145 722.0 719.0 6.0 8.0 2.25 722.0 726.0 730.0 POSITION THE SKIMMER OVER THE EXCAVATED PIT OR SUPPORT. BE SURE TO ATTACH A RSB 20-1 72 CMP 48 CMP 45 726.5 726.0 10.0 10.0 2.5 726.0 732.0 735.0 ROPE TO THE SKIMMER AND ANCHOR IT TO THE SIDE OF THE BASIN, THIS WILL BE RSB 20-2 42 (CMP) 30 (CMP) 32 739.5 739.0 6.0 6.0 1.5 740.0 743.0 745.0 1 USED TO PULL THE SKIMMER TO THE SIDE FOR MAINTENANCE, RSB 20-3 42 CMP 30 CMP 33 735.5 735.0 6.0 6.0 1.5 735.5 739.0 741.0 GOLD HILL MAINTENANCE CABARRUS COUNTYQUARRY L1 = BASIN LENGTH AT THE BOTTOM OF THE BASIN It I INSPECT SKIMMER SEDIMENT BASINS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (ONE-HALF INCH OR GREATER) W1 = BASIN WIDTH AT THE BOTTOM OF THE BASIN Profile AlongEmbankment at Spillway REVEGETAT I❑N PLAN RAINFALL EVENT AND REPAIR IMMEDIATELY. L2 = BASIN LENGTH AT THE TOP OF THE SEDIMENT STORAGE p y SPRING - FALL - WINTER SEED MIXES ' REMOVE SEDIMENT AND RESTORE THE BASIN TO ITS ORIGINAL DIMENSIONS WHEN SEDIMENT ACCUMULATES TO ONE-HALF W2 = BASIN WIDTH AT TOP OF THE SEDIMENT STORAGE `-------------- THE HEIGHT OF THE FIRST BAFFLE. PULL THE SKIMMER TO ONE SIDE SO THAT THE SEDIMENT UNDERNEATH IT CAN BE L3 = BASIN LENGTH AT THE TOP OF THE EMBANKMENT TOP OF EMBANKMENT ELEV. WEIR �aK�eg TOP OF EMBANKMENT ELEV. EXCAVATED. EXCAVATE THE SEDIMENT FROM THE ENTIRE BASIN, NOT JUST AROUND THE SKIMMER OR THE FIRST CELL. W3 = BASIN WIDTH AT THE TOP OF THE EMBANKMENT �" SPRING RATE MARCH - JUNE MAKE SURE VEGETATION GROWING IN THE BOTTOM OF THE BASIN DOES NOT HOLD DOWN THE SKIMMER. D1 = THE DEPTH OF SEDIMENT STORAGE 2• SPILLWAY CREST ELEV.I CHECK THE EMBANKMENT, SPILLWAYS, AND OUTLET FOR EROSION DAMAGE, AND INSPECT THE EMBANKMENT D2 = THE OVERALL DEPTH OF THE SEDIMENT BASIN r 2 MIN. ti• Rye Grain 15 - 20 l bs, per acre FOR PIPING AND SETTLEMENT. MAKE ALL NECESSARY REPAIRS IMMEDIATELY. REMOVE ALL TRASH AND OTHER DEBRIS D3 = THE CLEANOUT DEPTH OF THE SEDIMENT BASIN KEY IN 2 FT. MIN. KEY IN 2 FT. MIN. TYPICAL PIT CROSS SECTION B' MAX. Tall Fescue 40 - 80 l bs, per acre FROM THE RISER AND POOL AREA. A2 = SURFACE AREA AT THE TOP OF THE SEDIMENT STORAGE 2' DEEP CUTOFF TRENCH Sw i tchgrass 8 l bs, per acre IF THE SKIMMER IS CLOGGED WITH TRASH AND THERE IS WATER IN THE BASIN, USUALLY JERKING ON THE ROPE WILL LINED WITH FILTER FABRIC Va 70 Shrub Lespedeza 20 l bs, per acre MAKE THE SKIMMER BOB UP AND DOWN AND DISLODGE THE DEBRIS AND RESTORE FLOW. IF THIS DOES NOT WORK, PULL DESIGN NOTES: class I Rip Rap �3in. E FILLED WITH ROCK Min EXTENDING ENTIRE LENGTH Ser i cea Lespedeza 15 - 20 l bs, per acre THE SKIMMER OVER TO THE SIDE OF THE BASIN AND REMOVE THE DEBRIS. ALSO CHECK THE ORIFICE INSIDE THE SKIMMER 1. SEDIMENT STORAGE = 1800 CUBIC FEET PER DISTURBED ACRE of DAM Or Red Clover 8 - 14 l bs, per acre TO SEE IF IT IS CLOGGED; IF SO REMOVE THE DEBRIS. 2. REQUIRED SURFACE AREA = 0.01*Q10*43560 Hulled Common Bermuda Grass 4 l bs, per acre IF THE SKIMMER ARM OR BARREL PIPE IS CLOGGED, THE ORIFICE CAN BE REMOVED AND THE OBSTRUCTION CLEARED WITH 3. CLEANOUT DEPTH = 60% OF THE DESIGN STORAGE Or Weeping Love Grass 2 - 4 l bs, per acre A PLUMBER'S SNAKE OR BY FLUSHING WITH WATER. BE SURE AND REPLACE THE ORIFICE BEFORE REPOSITIONING THE 4. SEDIMENT VOLUME CALCULATIONS ASSUME 2:1 SLOPES IN THE BASIN SKIMMER. 5. DESIGN STORM IS 50 YEAR TO PASS THROUGH RISER/BARREL (NO EMERGENCY SPILLWAY) Section Through Embankment at Spillway FREEZING WEATHER CAN RESULT IN ICE FORMING IN THE BASIN. SOME SPECIAL PRECAUTIONS SHOULD BE TAKEN IN THE FALL RATE ( MID) AUGUST - ❑CT❑BER WINTER TO PREVENT THE SKIMMER FROM PLUGGING WITH ICE. 4' HIGH FENCE 5' SPILLWAY CREST ELEV. Rye Grain 40 lbs, per acre WITH 3 STRAINS Class I Rip Rap y iRISER PIPE SEDIMENT BASIN FINE GRAVEL (NCDOT #57 OR EQUIV.) 1 FT. THICK Tall Fescue 80 l bs, per acre OF BARBED WIRE Min. SEDIMENT STORAGE AREA Seri cea Lespedeza ( Unscar i f i ed) 40 l bs, per acre EXISTING GROUND Orchard Grass 30 l bs, per acre WELDED ALUMINUM `\LI DEEP FIL WITH ED R ROCK SAFETY White Clover 5 l bs, per acre I IS7 ROCK APRON 1:1 (TYP.) U LINED WITH FlLTER FABRIC BAR TRASH RACK Minimum Thickness = 1.5' 2' EXTENDING ENTIRE LENGTH I SAFETY BENCH EX FUND SCREEN 6" ON 2 MIN. OF DAM WINTER RATE N❑VEMBER - FEBRUARY CENTER EACH DIRECTION --a�-- 2 1� --- a- 1 Rye Grain 40 l bs, per acre I 20' TYP _ A I I ` A 2 Unhu l l ed Bermuda Grass 10 l bs, per acre QUARRY To BE 1� Rock Dam i �________ _________' ' Unscar i f i ed Seri cea Lespedeza 30 lbs. per acre I FILLED WITH 7 _ _;_�--------TT---------#-k = 2 1 , Z Tall Fescue 80 lbs. per acre WATER I II Not To Scale ANTI-VORTEX f w_. PLATES s�O� FERTILIZER ALL SEASONS I 12° TYP I I „ A B C GAUGE MIN. SIZE SUPPORT BAR F STORAGE AREA CLEANOUT SEDIMENT SURFACE 72" 102" 36" 14 2" x 2" x 3/8" ANGLE - DEPTH STORAGE AREA 10 - 20 - 20 1500 lbs. per acre ti 30' TYP PLAN L i me 4000 lbs. per acre � I I 48" 72" 21'' 21 1.25" x 1.25" x .25" ANGLE BASIN W1 L1 D1 W2 L2 D2 W3 L3 D3 (FT3) A2 Mulch 70 bales per acre l� B TAC42" 60" 19' 19 1.25" x 1.25" x .25" ANGLE RD 12-3 45. 0 100. 0 3. 0 57. 0 112. 0 6. 0 69. 0 124, 0 1. 8 16, 326. 0 6, 384. 0 p , ALL JOINTWELD RD 12-4 30. 0 60. 0 3. 0 42. 0 72. 0 6. 0 54. 0 84. 0 1. 8 7, 236, 0 3, 024. 0 W ALL JOINTS Mulch to be anchored by one of the following methods) RD 12-5 65. 0 135. 0 3. 0 77. 0 147. 0 6. 0 89. 0 159. 0 1. 8 30, 141, 0 11, 319. 0 ti II TEMPORARY DIVERSION DITCH RD 20-1 VARIE VARIES 2. 5 VARIES VARIES 5. 5 VARIES VARIES 1. 5 67, 509. 0 29, 042. 0 1. Crimping m I n with mulch anchoring n tool; or C ANTI-VORTEX P 9 9 PLATES - 1/4" METAL NTS 2. Tack with asphalt emulsion - 400 gal, per acre ---_-----�L_________, !� CMP (SEE CHART BELOW L1 = BASIN LENGTH AT THE BOTTOM OF THE BASIN W ANTI-VORTEX 1� FOR GAUGE THICKNESS) W1 = BASIN WIDTH AT THE BOTTOM OF THE BASIN V PLATES L2 = BASIN LENGTH AT THE TOP OF THE SEDIMENT STORAGE LOW FLOW ORIFICE (SEE W2 = BASIN WIDTH AT TOP OF THE SEDIMENT STORAGE ' BASIN DETAIL FOR L3 = BASIN LENGTH AT THE TOP OF THE EMBANKMENT ELEVATION AND SIZE.) W3 = BASIN WIDTH AT THE TOP OF THE EMBANKMENT ' D1 = THE DEPTH OF SEDIMENT STORAGE `--------- ----------j D2 = THE OVERALL DEPTH OF THE SEDIMENT BASIN ' A D3 = THE CLEANOUT DEPTH OF THE SEDIMENT BASIN A2 = SURFACE AREA AT THE TOP OF THE SEDIMENT STORAGE ISOMETRIC INSIDE DIAMETER i SECTION A-A SPILLWAY DIMENSIONS I NOTES: BASIN MIN WEIR LENGTH DEPTH 1. COORDINATE THE SIZE OF THE SAMPLING GATE WITH THE OWNER. 2. PROVIDE AN ACCESS WALKWAY WITH HANDRAILS FROM THE TOP OF DAM TO THE TOP OF THE TRASH RACK FT FT -------------- 3. MANUFACTURER TO DESIGN AND SUBMIT SHOP DRAWINGS FOR ALL COMPONENTS OF THE ANTI-VORTEX DEVICE. RD 12-3 22. 0 3. 0 W I RD 12-4 11. 0 3. 0 RD 12-5 40. 0 3. 0 --III-i i I=1 I ANTI - VORTEX DEVICE -I 11=1 11=i , I-I 11=1 I i 2' 3O' MI I MI I I- H i t=1 I MI I I- NOTE THE SPILLWAY LENGTH SHOULD BE INSTALLED WITH A WIDTH -III-III-III i 1=1 I I-III-I I TYPICAL RECLAMATION AS LARGE AS POSSIBLE. �-III-III=III-III-III-III-III-III-III-III-III-I I I- 31 -ITI-ITI-1T1=1T1=1T1=1T1=1T1=1T1=1T1=1T1=1T1=1T1=1T PIT CROSS SECTION INSTALL COLLAR WITH ROCK DAM ELEVATION SURFACE AREA VOLUME STORAGE VOLUME NOTES GRASS LINED CHANNELS CORRUGATIONS VERTICAL COLLAR TO BE SAME GAGE AS THE 10' RD 20-1 (SF) (FT3) (FT3) PIPE WITH WHICH IT IS USED. 713. 50 24, 624 0. 00 0. 00 BASIN FLOOR 714. 00 25, 849 12 618 12, 618 C❑NSTRUCTI❑N SPECIFICATIONS 716. 00 29, 042 54 891 67, 509 TOP OF SEDIMENT STORAGE / SPILLWAY ELEVATION CONTINUOUS BASIN LENGTH WIDTH 718. 00 T❑P OF ROCK DAM 1. REMOVE ALL TREES, BRUSH, STUMPS, AND OTHER OBJECTIONABLE WELD 1/2" x 2" SLOTTED HOLES FOR 3/8" DIAMETER BOLTS MATERIAL FROM THE FOUNDATION AREA AND DISPOSE OF PROPERLY. RSB 12-1 9. 5 FEET 9. 5 FEET 2. EXCAVATE THE CHANNEL AND SHAPE IT TO NEAT LINES AND TYPICAL BERM SECTION Construction Specifications DIMENSIONS SHOWN ON THE PLANS PLUS A 0. 2-FT ❑VERCUT AROUND 0 0 o O.D. OF PIPE o 0 o RSB 12-2 9. 5 FEET 9. 5 FEET INCLUDING PIP RSB 12-3 9. 5 FEET 9. 5 FEET 1. Clear the areas under the embankment and stripof roots another objectionable material. DelayTHE CHANNEL PERIMETER TO ALLOW FOR BULKING DURING SEEDBED „SPACE 2" SPACE 12" MIN. I PREPARATIONS AND SOD BUILDUP. 8" Cc 2" q a" cc 2" RSB 12-4 6. 0 FEET 6. 0 FEET clearing the reservoir area until the dam is in place. 2" RSB 12-5 6. 0 FEET 6. 0 FEET 2. Cover the foundation area including the abutments with extra-strength filter fabric before backfilling 3. REMOVE AND PROPERLY DISP❑SE OF ALL EXCESS S❑IL S❑ THAT 1" RSB 20-1 8. 5 FEET 8. 5 FEET with rock. If a cutoff trench is required, excavate at center line of dam, extending all the way up SURFACE WATER MAY ENTER THE CHANNEL FREELY. the earth abutments. Apply filter fabric under the rock fill embankment, from the upstream edge RSB 20-2 5. 5 FEET 5. 5 FEET of the dam to the downstream edge of the apron, Overlap fill material a minimum of 1 foot at 4. THE PROCEDURE USED TO ESTABLISH GRASS IN THE CHANNEL WILL �11I 1111 i�� RSB 20-3 6. 0 FEET 6. 0 FEET all joints, with the upstream strip laid over the downstream strip. ��`` DEPEND UPON THE SEVERITY ❑F THE CONDITIONS AND SELECTION ❑F CAS coNnNuous CORRUGATED METAL 3. Construct the embankment with well-graded rock and gravel to the size and dimensions shown on '(N O WELD SHEL7 WELDED TO WELD BOTH SIDES the drawings. It is important that rock abutments be at least 2 feet higher than the spillway crest SPECIES, PROTECT THE CHANNEL WITH MULCH OR A TEMPORARY CENTER OF BAND 2� LINER AS NOTED ON THE PLANS TO WITHSTAND ANTICIPATED and at least 1 foot higher than the dam, all the way to the downstream toe, to prevent scour and A VEL❑CITIES DURING THE ESTABLISHMENT PERIOD. - BERM TO BE CONSTRUCTED OF erosion at the abutments. _ SEAL ELEVATION OF UNASSEMBLED COLLAR SECTION A-A EARTH OR BOULDERS 4. Sediment-laden water from the construction site should be diverted into the basin reservoir at the MAINTENANCE furthest area from the dam. 16883 5. Construct the rock dam before the basin area is cleared to minimize sediment yield from DURING THE ESTABLISHMENT PERIOD, CHECK GRASS-LINED CHANNELS AFTER ° NOTES FOR COLLARS: construction of the basin. Stabilize immediately all areas disturbed during the construction of the EVERY RAINFALL. AFTER GRASS IS ESTABLISHED, PERIODICALLY CHECK dam except the sediment pool (References: Surface Stabilization). THE CHANNEL; CHECK IT AFTER EVERY HEAVY RAINFALL EVENT. �'� F 1. ALL MATERIAL To BE IN ACCORDANCE WITH CONSTRUCTION AND CONSTRUCTION MATERIAL SPECIFICATIONS. 6. Safety - Sediment basins should be considered dangerous because they attract children. Steep ''� SLEY \`� 2. WHEN SPECIFIED ON THE PLANS, COATING of COLLARS SHALL BE IN ACCORDANCE WITH CONSTRUCTION AND CONSTRUCTION side slopes should be avoided. Fences with warning signs may be needed if trespassing is likely. IMMEDIATELY MAKE REPAIRS, I T I S PARTICULARLY IMPORTANT T❑ CHECK 1111"I I I I I I"N MATERIAL SPECIFICATIONS. All state and local requirements must be followed. THE CHANNEL OUTLET FOR BANK STABILITY AND EVIDENCE ❑F PIPING ❑R 5-06-20 q SCOUR HOLES. REMOVE ALL SIGNIFICANT SEDIMENT ACCUMULATIONS TO cuSigned by: 3. UNASSEMBLED COLLARS SHALL BE MARKED BY PAINTING OR TAGGING TO IDENTIFY MATCHED PAIRS. MAINTAIN THE DESIGNED CARRYING CAPACITY. ow" o� I-III-III-III-III-III-III-I Maintenance 4 ASPHALT MASTICTHE LAP EATTHE TIME OF NSTALLATION HALF NS AND BETWEEN THE PIPE AND THE CONNECTING BAND SHALL BE CAULKED WITH I�I Check sediment basins after each rainfall. Remove sediment and restore original volume when sediment 5. EACH COLLAR SHALL BE FUIRNISHED WITH TWO 1/2" DIAMETER RODS WITH STANDARD TANK LUGS FOR CONNECTING III- accumulates t0 about one-half the design volume. COLLARS TO PIPE. DIVERSION CHANNEL Check the structure for erosion, piping, and rock replacement after each significant rainstorm and repair immediately. DETAILS OF CORRUGATED METAL I- ANTI-SEEP COLLARS Remove the structure and any unstable sediment immediately after the construction site has been TEMPORARY H I G H WA L L BERM permanently stabilized. Smooth the basin site to blend with the surrounding area and stabilize. All water and sediment should be removed from the basin prior to dam removal. Sediment should be placed in designated disposal areas and not allowed to flow into streams or drainage ways during XX structure removal. alley, williams, carmen, & king, inc. GOLD HILL QUARRY 2020 PERMIT MODIFICATION REVISION No. DESCRIPTION DATE INITIAL DATE: 5-06-20 JOB NO. 11526 CONSULTING ENGINEERS DRAWN BY: Rcc SHEET NO. FIRM LICENSE No. F-0203 VULCAN CONSTRUCTION MATERIALS , LLC CHECKED BY: GWW DETAILS 7 120 SOUTH MAIN STREET P.O. BOX 1248 120 SOUTH IN 28082 P.O. BOX 1248 CABARRUS/ROWAN COUNTY, NORTH CAROLINA DWG No.: KAN1526 MINMOD DET 2020.DW OF: 9