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Home My WebLink AboutNCG021049008 ` \ 50 0 5 TOP OF BERM 100 CONSTRUCTION, MAINTENANCE AND INSPECTION NOTES . ELEV 832.00 f I I I I -_._-- 20'WIDTH 4 1. INSPECT SEDIMENT BASINS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT 1/2 4 ( /�/\/ 0 1 Co c/\�\/\� Cumulative Storage -E- ET a INCH OR GREATER RAINFALL EVENT AND REPAIR IMMEDIATELY. �� i�A/AA ) i \l \ o ELEV 830.80 RIP RAP INFLOW PROTECTION l / i /\//\//\//\// /%\//\// �` / -- //\ 833,00 H G- " I 2. REMOVE SEDIMENT AND RESTORE THE BASIN TO ITS ORIGINAL DIMENSIONS WHEN IT \\% SEES SHEET 00 009 1 \ V,/\ V o/o/\ \ \ I \ ACCUMULATES TO ONE-HALF THE DESIGN DEPTH. PLACED REMOVED SEDIMENT IN AN �A VA VA VA VA \A VA VA �� VA VA VAS"V ��✓1 ��✓ � n�`� � �✓ �`VA y A \ \ \ \ \ \ ' o \/// /��// // //�//�//�//�//\///\///�//�rj\r\r\i i\r\r�,<;Ar��;r��r i �i�i\i �i i r ,/�/////////////j i\//j/\i\/\/\//j/// TOP OF BERM ` '' , A,AA \ vVAVA,AA \AVAVAVAVAVAVAVAVAVAVAVAAAVA,� OUTLET PROTECTION OP-205A ( co a AREA WITH SEDIMENT CONTROLS. A/A/A/A/ i 30 a AA/AAA/X' X'A/�AA/��//VAA/AAA//VAS I SEE SUMMARY SHEET OOG-005 a 3. CHECK EMBANKMENT, SPILLWAYS, AND OUTLET FOR EROSION DAMAGE, AND INSPECT \\j;\\%\� A A; A \ \ \ 5A-N l\�\\o\o o�'\\ \ \�\ \� \� \ \ \ \/�/ S3'l.t�#1 .80 B i.QQ � � a� THE EMBANKMENT FOR PIPING AND SETTLEMENT. MAKE ALL NECESSARY REPAIRS POROUS BAFFLES ` f \ -- PIPE 5A-N ( SEE CULVERT IMMEDIATELY. REMOVE ALL TRASH AND OTHER DEBRIS FROM THE RISER AND POOL SECTION B EMERGENCY SPILLWAY ET OOG-011 ` \ \ \ \ SUMMARY TABLE ON AREA. SEE DETAIL SHE - \ \ SHEET OOG-005) 80:00 830.00 a 0 PRINCIPAL SPILLWAY p I SIL T FENCE �, � �-- .PIPE B-N � � �� 12" CLASS 1 RIP-RAP SEE DETAIL SHEET OOG-008 / / -- .8? CLEANOUT ELEV. --- NON-WOVEN GEOTEXTILE FABRIC----- -- - -- - 1 7.2', ELEV. 830.8 COMPACTED FILL ON TOP OF 828,00 80 828,00 BETWEEN ALL SOIL AND RIP RAP. I ANCHOR IN FABRIC BY RUNNING VIRGIN SOIL WITH TOP SOIL \ ^/ ALONG FACE OF SPREADER LIP TO o REMOVED. 827.00 TOP OF FOOTER a �� o - -VIRGIN GROUND O /V/V/��/V/V/V/V/V---- 3:1 ' \ \\ \\ \\ \\ \\ \\ \\ \\ \\ \ \ 3.1 ELEV. 830 + TOP OF BERM ELEV. 832. ` , BOTTOM OF POND o r'qT \\/\\/\\r\\/\\/\\/\\/\\/\\/\\/\\/\\,\\/\/\\/\\/\\/\\/\\,\�/\\/\\< \\ 1826.00 \ELEV. 827.80 00 POND BOTTOM o /\//\//\//\// /\//\//\//\//\//\/ //\//\/ 1 _ ELEV: 827.80 i/////% //\\//%\///\\//%\o\///\\o\//%\///\\// %//%//%//%///\\�/%\//% �\o\%%////%//%//%///\ / / /\\j\\j\y\\j\\j\\j\\j\\j\\r\�r\\j\\j\\j\\j\\j\\j\\j\\j\\j\\j\\j\\j\�j\\j\\j\`j\\j\\j\\j 825,00 11 N PROPOSED \/��\ % o C7 /\//\ '\//\//\//\//\//\r/\�/\//\%\//\!\//\i/\//\//\//\// //\�\//\//\//�i\// //\/�\//\//\// //\//\//\/\ o \\/\\/\\/\\/\ \/\\j\\j\\j\\j\�r\\j\\j\\j\\ \\j\\j\\j\\j\\j\\j\\ \�j\\j\\ \\ \\j\\ \\ \\j\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \ 0:00 0.04 0,21 0.2 0 6 0.52 0.75 0.81 1.l_A I I \\ \ \ PLANT BUILDING ,�,.. \ \�r\\ \\ \\ \ \\ \\ \\ \\ \ \\ �\ \\ \\ \\ \\ \\ \\ \\,\\ \\ \\ \ \\ \\ \ \\ \\ \\r\�i\\ \\ �\ \\ \\ \\ \\ \\ \\ \ \` \\ \� \\ \\ \ SB-205 B� ! AND EQUIPMENT ) // / // // // / // //i// // // // // // // // �' // // r% / / // // // // //�/ // // / /// /r// // // // // // // // // // // //,// // , ( COtttPatle Storage(a •)t) I ( Ai \ EMERGENCY SPILLWAY � I \ I _ � ELEV. 830.80 \ KEY IN RIP-RAP KEY IN RIP-RAP o PROPOSED SITE SECTION A SEE DETAIL THIS SHEET \� A 6 v 0 00 zI ACCESS ROAD EMERGENCY SPILLWAY Basin Size 48" OUTLET STRUCTURE WITH C 1 A \ Q 5B-NII NOT TO SCALE Elev. (msl) Depth(ft) Area (sf) Cumulative Volume (ac-ft) SKIMMER AND 50 LF OF 24" HDPE \ \ \ M S THIS SHEET r' o0 827.80h 0. 8,444 0_00 �24" HDPE PIPE _ ARM ASSEMBLY SEE DETAIL \ � \� ° � �� ; 828.E t3 20 „809 0.04 \ @ 1 /o SLOPE a = 82&80 1.00 10,048 06.21 i 1 1, r 829.00 1.20 10,387 0.26 OUTLET PROTECTION OP'-205 , SEE SUMMARY SHEET OO�G-005 � "� �' -- -- „C" ENCLOSURE 829. R 2.00 11,661 0.46 1 ,-INLET AT �,I',� � !,' .' 1 «�. _- 830.0 2.2{� 12,4148 0.52 �- 830. 3..C)0 13,380 0.75 C LOW POINT, PROVIDE I, DURING CONTRUCTION \ � 1 INLET PROTECTION � � a �� 831.t10 3.20 13,178 Ok..81 1 \--- WATER EN1 RY UNl i 832.00 4,20 15,576 1,15 BASIN ACCESS ROAD I ` I P ERSPE� %i \77 DRAINAGE AREA �� \\ \ �- DELINEATION a PVC VENT - SCHEDULE 40 30' STREAM BUFFER/ Q I I PVC ELBOW PIPE PVC PIPE (�� ) \ PVC END CAP - ' o \� PIPE DIAMETER � ; .LIMIT OF DISTURBANCE a a _ WATER SURFACE ,�.,.. , .... SEDIMENT BASIN 205 PRINCIPLE SPILLWAY ° PVC END CAP MSki 8,1 DESIGN INFORMATION 3" PVC PIPE Desired Skimmer�a�wdo�lx�r�Time 4��6. 72'hrs PLAN VIEW SEE TABLE FOR ��,�,� �kimmerD�a,�� Rate �,�} �700 �,�,� Outlet: Sediment Basin 205 Principle Spillway, Drop Pipe PVC PIPE - - T v: ft - _ _ Riser o Ele 829.80 SCALE 1 - 50 � PIPE DIAMETER p 1/2" HOLES N Skimmer Size 3.0 in Riser Length: 4.0 ft INSTALL COLLAR WITH CORRUGATIONS / UNDERSIDE Orifice Coefficient: 0.60 PVC TEE Head ore Orifice 0-250 t VERTICAL. COLLAR TO BE OF SAME GAGE 1.5" ORIFICE PLATE PVC TEE - Weir Coefficient: 3.1 AS THE (PIPE WITH WHICH IT IS USED. 'N Culvert Length: 50.00 ft CUTOFF TRENCH ALIGNS , Culvert Diameter. 24.00 in - Calculated Orifice Diameter? 1-M in Culvert Invert In: 826.80 ft t �.;"`� NOTES: BAND WITH EMBANKMENT FI-EXIBLE -- 1/2"X 2" SLOTTED 1. ALL PVC PIPES ARE TO BE SCHEDULE 40 UNLESS a1 OrrfieOe Diameter- •l.;iQI'orc Culvert Friction Coefficient: 0.01 HOSE 2„ �- HOLES @ 8" C.C. "'' OTHERWISE NOTED. al Skimmer 0wwctawwrt�Ttrn�e7 75 hrs Culvert Entrance Loss Coefficient: 0.90 �� FOR 3/8"Q BOLTS - EXISTING GROUND 2. ALL JOINTS OF THE FLOTATION SECTION SHALL BE SOLVENT WELDED. JOINTS OF SKIMMER SECTION NEED Discharge: 21.07 cfs z _�.-_ FILL MATERIAL 2"-i-� - -- OD OF PIPE --2' MINIMUM IF NOT NOT BE WATER-TIGHT. Required Discharge: 21.07 cfs -�- CUT TO BEDROCK 3. HDPE FLEXIBLE DRAIN PIPE IS TO BE ATTACHED TO THE ;d � q �o q �o � b, - PIPE BARREL STRUCTURE WITH WATER-TIGHT B END W EW FRONT V �W CONNECTIONS. 1 - ------- 4. SKIMMER SIZES AND ORIFICE DIAMETERS ARE CALCULATED SKIMMER - ONE PIECE CONNECTING BASED ON NCDEQ DESIGN METHODOLOGY AND WILL BE BAND WELDED TO PIPE; REVIEWED AND APPROVED BY THE ENGINEER ONCE A W: 4' MIN. CONTINUOUS WELD BOTH 2' - - NOT TO SCALE SKIMMER SUPPLIER/MANUFACTURER HAS BEEN CHOSEN. RISER BUOYANCY CALCULATION -- - --- SIDES OF BAND -SUITABLE EARTHEN MATERIAL DEMONSTRATE ADEQUATE STABILITY BY SHOWING THE DOWNWARD FORCE IS A COMPACTED TO 95% OF STANDARD MINIMUM OF 1.25 TIMES THE UPWARD FORCE. PROCTOR MAX. DRY DENSITY WITHIN ±2% OPTIMUM MOISTURE CONTENT DOWNWARD FORCE (STRUCTURE WEIGHT) > 1.25 x UPWARD FORCE (BUOYANCY) ANTI-SEEP COLLARS CUT-OFF TRENCH --- ----- - 48" CONCRETE RISER ' NOT TO SCALE NOT TO SCALE TRASH RACK -- WEIGHT= 10147 lb SKIMMER, SEE DETAIL--- 1O' TOP OF THIS SHEET RETRIEVAL ROPE BERM WIDTH EMERGENCY SPILLWAY, SEE DETAIL THIS 4'x4' (INSIDE- ANCHORED IN - SHEET WHERE: DIMENSION) RISER SEDIIMEII 48" CONCRETE - THE SLOPE -----1' FREEBOARD RISER WEIGHT= 10147 lb STRUCTURE CLEA�NOUT RISER STRUCTURE MIN. V FREEBOARD-- / �/ TOP OF BERM. ELEV 832.00 GAGE -- WEIGHT OF CONCENTRATE BASE _ (LENGTH x WIDTH x DEPTH)x UNIT CONCRETE \ - -- --- ------- -- - WEIGHT OF CONCRETE ----- a ------- ----- - -- -- -- -------- _ \ -- 0.5 DEPTH OF FLOW BASE a a a a SEDIMENT CLEANIOUT - �❑ ❑oo❑ oo❑ ❑oo - / �/ / / / / /�%�o��%� / EMERGENCY SPILLWAY ELEV 830.80 WEIGHT OF CONCRETE BASE _ (5.5 ft x 5.5 ft x 1.5 ft) x 150 lb/ft'= 6806 lb MARK, ELEV 828.80 �o[ID �o°❑oo og❑❑❑o� RISER CREST ELEV. 829.80_ Voj V /��/��/��/v��/v /w�ov�ov��w��V� ,�V��oV��V� STRUCTURE WEIGHT= 10147 lb+ 6806 lb= 16,953 lb SKIMMER, ° �� r1� EMBANKMENT STABILIZED ' SEE DETAIL o- WITH VEGETATION BUOYANCY= DISPLACEMENT VOLUME OF RISER x 62.4 Ib/ft3 THIS SHEET ------ -- 3 -CUT OFF TRENCH 3 �r 24" DIA. CMP OUTLET APRON BUOYANCY = 96 ft'x 62.4 Ib/ft3= 5,990.4 lb DOWNWARD FORCE (STRUCTURE WEIGHT) > 1.25 x UPWARD FORCE (BUOYANCY) BOTTOM OF POND INV. ELEV 826.80 24"' DIA. CMP A _ _ _ r _ O ()Oo 00 ELEV 827.80 t_.___--___ III - - OHO°00 16.953 lb > 5,990.4 lb x 1.25 VAVMV III �-� -� - 16.953 lb > 7,488 Ib �''---_ ANTI-SEEP COLLAR 1. PORTLAND CEMENT CONCRETE (TYPE II RECOMMENDED) FOR THE INLET BASE -- SHALL HAVE A MINIMUM COMPRESSIVE STRENGTH OF 4,000 PSI. CONCRETE BASE _ 20' EVERY SEE DETAIL THIS SHEET -- --- ---- - --- ------------�-i 2. WHERE CORRUGATED ALUMINUM OR ALUMINIZED STEEL PIPE IS USED, ALL - 6.0' x 6.0' x 1.0' 20 AREAS WHERE THE PIPE IS TO BE IN CONTACT WITH CONCRETE SHALL BE PAINTED NOTES: WITH A BLACK BITUMINOUS ENAMEL PAINT. 1. FAIRCLOTH TYPE OR EQUIVALENT SKIMMER TO BE USED. RISER PLAN VIEW 2. INSTALL ANTI-VORTEX PLATE IN RISER STRUCTURE. NOT TO SCALE SEDIMENT RISER BASIN NOT TO SCALE PROJECT MANAGER V. HAYNES, PE --------- - " PIEDMONT LITHIUM CAROLINAS, INC. CAR0� SEDIMENT BASIN SB-205, :••FEss,o;�.,%L= CAROLINA LITHIUM PROJECT _ - _ Quo yam• 7 QQ 5 3/13/2024 REVISED PER DEMLR COMMENTS S AL _ PLAN VIEW & PROFILE DETAIL a. M4 1/23/2023 REVISED PER DEMLR COMMENTS 3 LITHIUM HYDROXIDE CONVERSION PLANT T3 5/31/2022 REVISED PER DEMLR COMMENTS 9•'••.NG i N PAA"OIED - ---- -,,,�F••...........••�y�,,� GASTON COUNTY, NORTH CAROLINA SHEET HDR Engineering Inc.of the Carolinas 2 12/08/2021 REVISED PER DEMLR COMMENTS ___ --------- �'�.,��E K. P�.�`�3/13/zOz4 FILENAME - 01CP-6005 440 S.Church Street,Suite 1200 - �,i �� L I UM J Charlotte,NC 28202-2075 1 8/27/2021 MINING PERMIT SCALE - 1" = 50' 01 C P-B005 704.338.6700 ISSUE DATE DESCRIPTION PROJECT NUMBER 10302238 N.C.B.E.L.S.License Number:F-0116