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Home My WebLink AboutNCG021049020 1 2 13 4 5 6 7 ( 8 5 2:1 SIDE SLOPE CAP 10'-0" MAXIMUM 1. o PROVIDE RAZOR WIRE AS SPECIFIED A q V 1' INLET ZONE 35% FIRST CHAMBER 25% > SKIMMER OUTLET VARIES 5 PROVIDE A MINIMUM OF THREE POROUS BAFFLES PER SKIMMER OF SURFACE AREA OF SURFACE AREA SEDIMENT TRAP SECOND CHAMBER 25% F/ow OF SURFACE AREA L OUTLET ZONE 15"Jo 1 5/8" OD TOP RAIL OF SURFACE AREA PLAN VIEW � � � �� / TENSION CHAIN LINK FABRIC BAR BANDS #9 GAUGE 2" MESH D 1 5/8" OD PROVIDE A MINIMUM 8'WIDE x 16' \ BRACE TUBE I- LONG CLASS 1 RIP-RAP 15"DEEP ON U LAYER OF NON-WOVEN GEOTEXTILE FABRIC(MIRAFI 140N OR APPROVED \ Q EQUAL)AT DITCH CONVEYANCE DROP ENTRY POINTS INTO THE / o SEDIMENT TRAPS. / / TENSION 2 2 Earth gar ' BAR 3/8" TRUSS ROD 1 0 / m AT END SECTIONS 12" 1 F / 12" �18 IN TENSION WIRE NONWOVEN GEOTEXTILE CV SECTION A-A END, CORNER OR PULL LINE POST PLUNGE POOL DESIGN AND CONSTRUCTION NOTES (TYPICAL) o POST (STEEL) 4" OD STEEL 21/2" OD 1. USE SPECIFIED CLASS OF RIPRAP. 4'-0" MAX SPACING 5'STEEL PO T PIPE -AND PULLPOS TO HAVE STEEL PIPE 2. USE NONWOVEN GEOTEXTILE AS SPECIFIED IN SECTION H-1 MATERIALS, AND PROTECT FROM PUNCHING, CUTTING, OR TEARING. REPAIR ANY DAMAGE OTHER THAN AN OCCASIONAL EQUAL BRACING SMALL HOLE BY PLACING ANOTHER PIECE OF GEOTEXTILE OVER THE DAMAGED PART OR BY COMPLETELY REPLACING THE GEOTEXTILE. PROVIDE A MINIMUM OF ONE FOOT OVERLAP FOR FLOWS ON BOTH SIDES ALL REPAIRS AND FOR JOINING TWO PIECES OF GEOTEXTILE. G A 3. PREPARE THE SUBGRADE FOR THE PLUNGE POOL TO THE REQUIRED LINES AND GRADES. COMPACT ANY FILL REQUIRED IN THE SUBGRADE TO A DENSITY OF APPROXIMATELY THAT OF - THE SURROUNDING UNDISTURBED MATERIAL. 8"DX6"W TRENCH 4. EMBED THE GEOTEXTILE A MINIMUM OF 4 INCHES AND EXTEND THE GEOTEXTILE A MINIMUM OF 6 INCHES BEYOND THE EDGE OF THE SCOUR HOLE. BACKFILL AND COMPACT A 5. STONE FOR THE PLUNGE POOL MAY BE PLACED BY EQUIPMENT. CONSTRUCT TO THE FULL COURSE THICKNESS IN ONE OPERATION AND IN SUCH A MANNER AS TO AVOID FENCE AND FABRIC 12" C' DISPLACEMENT OF UNDERLYING MATERIALS. DELIVER AND PLACE THE STONE FOR THE PLUNGE POOL IN A MANNER THAT WILL ENSURE THAT IT IS REASONABLY HOMOGENEOUS WITH THE BURIED IN TRENCH 12" SMALLER STONES AND SPALLS FILLING THE VOIDS BETWEEN THE LARGER STONES. PLACE STONE FOR THE PLUNGE POOL IN A MANNER TO PREVENT DAMAGE TO THE GEOTEXTILE. HAND PLACE TO THE EXTENT NECESSARY. NOTES: III=III~ III= 6. AT THE PLUNGE POOL OUTLET, PLACE THE STONE so THAT IT MEETS THE EXISTING GRADE. III-I i II= 1. PULL POST SHALL BE USED AT SHARP BREAKS IN VERTICAL GRADES OR AT APPROXIMATELY 330 CENTERS ON PLUNGE POOL MAINTENANCE NOTES III=` STRAIGHT RUNS, OR AS DIRECTED BY THE ENGINEER. 1. MAINTAIN LINE, GRADE, AND CROSS SECTION. KEEP OUTLET FREE OF EROSION. REMOVE ACCMULATED SEDIMENT AND DEBRIS. AFTER HIGH FLOWS INSPECT FOR SCOUR AND DISLODGED 2. SPLICES SHALL BE IN WOVEN WIRE FABRIC ONLY AT CORNER, GATE END, OR PULL POSTS. RIPRAP. MAKE NECESSARY REPAIRS IMMEDIATELY. 3. THE SECURITY FENCE SHALL BE CHAIN LINK, OF 9-GAUGE STEEL OR HEAVIER, ERECTED A MINIMUM OF 7 FEET IN HEIGHT, INCLUDING 3 STRANDS OF BARBED WIRE AT THE TOP, SKIMMER OUTLET SPLASH PAD/PLUNGE POOL SECURITY FENCE DETAIL NOT TO SCALE NOT TO SCALE B POROUS BAFFLES DESIGN AND CONSTRUCTION NOTES 9/16" C C 1. USE MATTING MADE OF 100% COCONUT FIBER (COIR) TWINE WOVEN INTO HIGH STRENGTH MATRIX WITH THE PROPERTIES SHOWN IN THE NCDEQ MANUAL, PRACTICE STANDARDS AND SPECIFICATIONS TABLE 6.65a. 2. STAPLES SHOULD BE MADE OF 0.125 INCH DIAMETER NEW STEEL WIRE FORMED INTO A 'U' SHAPE ®®®® NOT LESS THAN 12 INCHES IN LENGTH WITH A THROAT OF 1 INCH IN WIDTH. THE STAPLES ANCHOR THE POROUS BAFFLE INTO THE SIDES AND BOTTOM OF THE BASIN. BBB 3. ENSURE THAT STEEL POSTS FOR POROUS BAFFLES ARE OF A SUFFICIENT HEIGHT TO SUPPORT ��BB BAFFLES AT DESIRED HEIGHT. POSTS SHOULD BE APPROXIMATELY 1-3/8" WIDE MEASURED PARALLEL TEMPORARY STOCKPILE AREA TO THE FENCE, AND HAVE A MINIMUM WEIGHT OF 1.25 POUND/LINEAR FOOT. THE POSTS MUST BE a ❑ ❑ ❑ ❑ EQUIPPED WITH AN ANCHOR PLATE HAVING A MINIMUM AREA OF 14.0 SQUARE INCHES AND BE OF xre THE SELF-FASTENER ANGLE STEEL TYPE TO HAVE A MEANS OF RETAINING WIRE AND COIR FIBER MAT 2' IN THE DESIRED POSITION WITHOUT DISPLACEMENT. (MIN.) SILT FENCE 4. USE 9-GAUGE HIGH TENSION WIRE FOR SUPPORT WIRE. ❑ ❑ ❑ ❑ ❑ (SEE DETAIL 5. GRADE THE BASIN SO THAT THE BOTTOM IS LEVEL FRONT TO BACK AND SIDE TO SIDE. B THIS SHEET) 6. INSTALL THE COIR FIBER BAFFLES IMMEDIATELY UPON EXCAVATION OF THE BASINS. 1-1 F� F] F-1 F1 7. INSTALL POSTS ACROSS THE WIDTH OF THE SEDIMENT TRAP. � SOIL/SEDIMENT � i �, 8. STEEL POSTS SHOULD BE DRIVEN TO A DEPTH OF 24 INCHES AND SPACED A MAXIMUM OF 4 FEET STOCKPILE APART. THE TOP OF THE FABRIC SHOULD BE MINIMUM OF 6 INCHES HIGHER THAN THE INVERT OF ❑ ❑ ❑ ❑ THE SPILLWAY. TOPS OF THE BAFFLES SHOULD BE MINIMUM OF 2 INCHES LOWER THAN THE TOP OF AREA THE EARTHEN EMBANKMENT. ❑ ❑ ❑ ❑ ❑ 9. INSTALL AT LEAST THREE ROWS OF BAFFLES BETWEEN THE INLET AND OUTLET DISCHARGE POINT. BASIN LESS THAN 20 FEET IN LENGTH MAY USE 2 BAFFLES. 10. ATTACH A 9 GAUGE HIGH TENSION WIRE STRAND TO THE STEEL POSTS AT A HEIGHT OF 6 INCHES ;. ABOVE THE SPILLWAY ELEVATION WITH PLASTIC TIES OR WIRE FASTENERS TO PREVENT SAGGING. IF THE TEMPORARY SEDIMENT BASIN WILL BE CONVERTED TO A PERMANENT STORMWATER BASIN OF A ORIGINAL GROUND SURFACE GREATER DEPTH, THE BAFFLE HEIGHT SHOULD BE BASED ON THE POOL DEPTH DURING USE AS A TEMPORARY SEDIMENT BASIN. 11. EXTEND 9 GAUGE MINIMUM HIGH TENSION WIRE STRAND TO SIDE OF BASIN OR INSTALL STEEL T-POSTS TO ANCHOR BAFFLE TO SIDE OF BASIN AND SECURE TO VERTICAL END POSTS. 12. DRAPE THE COIR FIBER MAT OVER THE WIRE STRAND MOUNTED AT A HEIGHT OF 6 INCHES ABOVE THE SPILLWAY ELEVATION. SECURE THE COIR FIBER MAT TO THE WIRE STRAND WITH PLASTIC TIES OR WIRE FASTENERS. ANCHOR THE MATTING TO THE SIDES AND FLOOR OF THE BASIN WITH 12 INCH m WIRE STAPLES, APPROXIMATELY 1 FOOT APART, ALONG THE BOTTOM AND SIDE SLOPES OF THE BASIN. A 13. DO NOT SPLICE THE FABRIC, BUT USE A CONTINUOUS PIECE ACROSS THE BASIN. 14. ADJUSTMENTS MAY BE REQUIRED IN THE STAPLING REQUIREMENTS TO FIT INDIVIDUAL SITE CONDITIONS. NOTES: POROUS BAFFLE MAINTENANCE NOTES 1. TRASH RACK TO BE HOT-DIPPED GALVANIZED OR OTHER NON-CORROSIVE MATERIAL. 1. INSPECT BAFFLES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REQUIRED REPAIRS TEMPORARY STOCKPILE CONSTRUCTION NOTES IMMEDIATELY. 2. BE SURE TO MAINTAIN ACCESS TO THE BAFFLES. SHOULD THE FABRIC OF THE BAFFLE COLLAPSE, TRASH RACK TABLE 1. SILT FENCE TO EXTEND AROUND ENTIRE PERIMETER OF STOCKPILE, OR IF STOCKPILE AREA IS TEAR, DECOMPOSE, OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY. LOCATED ON/NEAR A SLOPE THE SILT FENCE IS TO EXTEND ALONG CONTOURS OF THE 3. REMOVE SEDIMENT DEPOSITS WHEN IT REACHES HALF FULL, TO PROVIDE ADEQUATE STORAGE VOLUME RISER SIZE A B C D E F DOWNI-GRADIENT AREA. FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE BAFFLES. 2. IF STOCKPILE IS TO REMAIN FOR MORE THAN 14 DAYS, TEMPORARY STABILIZATION MEASURES MUST 4. TAKE CARE TO AVOID DAMAGING THE BAFFLES DURING CLEANOUT, AND REPLACE IF DAMAGED DURING BE IMPLEMENTED. CLEANOUT OPERATIONS. SEDIMENT DEPTH SHOULD NEVER EXCEED HALF THE DESIGNED STORAGE 3. SILT FENCE SHALL BE MAINTAINED UNTIL STOCKPILE AREA HAS EITHER BEEN REMOVED OR DEPTH. PERMANENTLY STABILIZED. 4. THE KEY TO FUNCTIONAL TEMPORARY STOCKPILE AREAS IS WEEKLY INSPECTIONS, ROUTINE 5. AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED, REMOVE ALL BAFFLE MAINTENANCE, AND REGULAR SEDIMENT REMOVAL. MATERIALS AND UNSTABLE SEDIMENT DEPOSITS, BRING THE AREA TO GRADE, AND STABILIZE IT. 48" SQUARE 4'-0" 3'-5" 0'-3" 0'-8" 0'-3" 1'-0" 5. WATER TO BE APPLIED BY SPRAYER TO STOCKPILE TO KEEP DUST DOWN. AVOID EXCESS WATER THAT CAN CAUSE EROSION PROBLEMS. 72" SQUARE 6'-0" 5'-2" 0'-4" 1'-0" 0'-5" 1'-5" TEMPORARY STOCKPILE DETAIL POROUS BAFFLE DETAIL TRASH RACK DETAIL NOT TO SCALE NOT TO SCALE NOT TO SCALE PROJECT MANAGER V. HAYNES, PE " - PIEDMONT LITHIUM CAROLINAS INC. ',, �N•••••••R�< -,, EROSION CONTROL DETAILS =o CAROLINA LITHIUM PROJECT SAL 5 3/13/2024 REVISED PER DEMLR COMMENTS =4 1/23/2023 REVISED PER DEMLR COMMENTS 3 LITHIUM HYDROXIDE CONVERSION PLANT ti0 F,. PIE T 3 5/31/2022 REVISED PER DEMLR COMMENTS '•�9��''•• IN ,".• GASTON COUNTY NORTH CAROLINA SHEET HDR Engineering Inc.of the Carolinas 2 12/08/2021 REVISED PER DEMLR COMMENTS FR/E"K""NPy .�`� FILENAME - OOG-011 440 S_Church Street,Suite 1200 1 8/27/2021 MINING PERMITLITHIUM ��` 3/13/2024 Charlotte, NC 28202-2075 SCALE - NTS OOG-01 1 704.338.6700 ISSUE DATE DESCRIPTION PROJECT NUMBER 10302238 N.T.S. N.C.B.E.L.S.License Number:F-0116