NCG021049018

1 2 3 4 5 6 7 8
2" x 2" WOOD STAKES OR FLOW STAKES PLACED AT 2'
1.25 FT STEEL POST DRIVE STAKES AN ANGLE TO MINIMUM SPACING
#/ WATTLE INTO SOIL AND NOT
4' MIN. SILT FENCE PERPENDICULAR TO GRADE. i(TYPICAL)
I
MINIMUM NG,Th/�jpM I o
TOP OF SILT FENCE r %; Mq� MINIMUM
MUST BE AT LEAST
-\ �r 2.0' SPACING (TYPICAL) ?0
ABOVE THE TOP OF r,�
THE WASHED STONE `-.�/ \ \\ � /\,�\ 18" '� CONTINUOUS ALONG TUBE M/N� I D
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SEDIMENT TUBE SPACING
TEMPORARY DIVERSION SLOPE MAX. SEDIMENT TUBE SPACING INSTALL SECTION OF
STEEL FENCE /0
BURY WIRE FENCE,
FILTER FABRIC, DESIGN AND CONSTRUCTION NOTES LESS THAN 2° MATTING (N.A.G. C350 OR
150-FEET APPROVED (EQUAL) UNDER
STEEL FENCE POST POST SET MAX 2' u AND HARDWARE
APART MIN. 18" CLOTH IN TRENCH 2% 100-FEET ALL SEDIMENT TUBES
WIRE FENCE 1. IMMEDIATELY LINE AND STABILIZE BEFORE ANY DOWNSLOPE GRADING BEGINS PRIOR TO SEDIMENT TUBE A-A
INTO SOLID (STABILIZATION MUST OCCUR BEFORE ISSUANCE OF A CERTIFICATE OF COMPLIANCE). 3% 75-FEET INSTALLATION
HARDWARE CLOTH % GROUND STABILIZATION METHOD IS BASED ON VELOCITY OF OFFSITE DRAINAGE.
TO BE 16" HIGH FRONT VIEW 2. DIVERSIONS SHOULD ONLY BE USED FOR DRAINING 5 ACRES OR LESS. 4% 50-FEET SEDIMENT TUBE INSTALLATION
3. DIVERTED WATER SHOULD EMPTY INTO AN APPROVED OUTLET DEVICE. 5% 40-FEET
FILTER OF#57 °� 4. ALL TEMPORARY DIVERSION SWALES SHALL BE MATTED.
WASHED STONE 0° 6% 30-FEET
°
TO BE 16" HIGH o 6,q SILT FENCE ROCK OUTLET
AND PLACED AT o n 00 TEMPORARY DIVERSION MAINTENANCE NOTES
A 1:1 SLOPE o �°go�op 3' ILTER GROUNDBRIC DESIGN AND CONSTRUCTION NOTES 1. INSPECT EVERY 7 CALENDAR DAYS AND IMMEDIATELY FOLLOWING A RAIN EVENTao
GREATER THAN 6% 25-FEET
0 p-8�opO� WHICH EXCEEDS 1.0 INCHES IN A 24-HOUR PERIOD. REMOVE SEDIMENT FROM
oa° 0�o� `po 1. HARDWARE CLOTH AND GRAVEL SHOULD OVERLAY THE SILT
° o 0 00°o THE FLOW AREA AND REPAIR THE DIVERSION RIDGES. ALSO CHECK AND MAINTAIN
FLOW D�,o g o�oo0 0 FENCE AT LEAST 16 INCHES. OUTLETS. DESIGN AND CONSTRUCTION NOTES
° op ° 0��0°0 0�0 0 2. STONE OUTLETS SHOULD BE PLACED ON LOW ELEVATION AREAS 2. WHEN THE PROTECTED AREA IS PERMANENTLY STABILIZED, REMOVE THE RIDGES AND 1. MATERIALS USED IN THE SEDIMENT TUBE MUST MEET THE SPECIFICATIONS OUTLINED IN THE NCDEQ EROSION AND SEDIMENT CONTROL MANUAL PRACTICE 6.18, COMPOST
0�0 0�,0 o O OF SILT FENCE AND BASED ON FIELD CONDITIONS. THE CHANNEL TO BLEND WITH THE NATURAL GROUND LEVEL AND APPROPRIATELY BLANKETS.
IL STABILIZE SITE. 2. SEDIMENT TUBES SHOULD BE LOCATED AS SHOWN ON THE EROSION AND SEDIMENTATION CONTROL (PLAN.
BURY WIRE FENCE AND SILT FENCE ROCK OUTLET MAINTENANCE NOTES 3. PRIOR TO INSTALLATION, CLEAR ALL OBSTRUCTIONS INCLUDING ROCKS, CLODS, AND OTHER DEBRIS GREATER THAN ONE INCH THAT MAY INTERFERE WITH PROPER
AND HARDWARE CLOTH BURY 6" OF UPPER EDGE OF 1. PER NCG-01, INSPECT OUTLET AT LEAST ONCE A WEEK AND FUNCTION OF THE SEDIMENT TUBE.
FILTER FABRIC IN TRENCH AFTER EACH 1 INCH OR GREATER RAINFALL EVENT. COMPLETE 4. FILL SOCK NETTING UNIFORMLY WITH COMPOST TO THE DESIRED LENGTH SUCH THAT LOGS DO NOT DEFORM.
ANY REQUIRED REPAIRS IMMEDIATELY.
2. FRESHEN STONE WHEN SEDIMENT ACCUMULATION EXCEEDS 6 5. OAK OR OTHER DURABLE HARDWOOD STAKES 2" X 2" IN CROSS SECTION SHOULD BE DRIVEN VERTICALLY PLUMB, THROUGH THE CENTER OF THE SEDIMENT TUBE. C
INCHES. STAKES SHOULD BE PLACED AS SHOWN ABOVE. THE STAKES SHOULD BE DRIVEN TO A MINIMUM DEPTH OF 12 INCHES, WITH A MINIMUM OF 3 INCHES PROTRUDING
ABOVE THE SEDIMENT TUBE.
3. KEEP MESH FREE OF DEBRIS TO PROVIDE ADEQUATE FLOW. 6. SEDIMENT TUBES ARE NOT TO BE USED IN PERENNIAL OR INTERMITTENT STREAMS.
SECTION VIEW 4. REMOVE SEDIMENT WHEN HALF OF STONE OUTLET IS COVERED.
5. REPLACE STONE AS NEEDED TO FACILITATE DE-WATERING. SEDIMENT TUBE MAINTENANCE NOTES
1. INSPECT SEDIMENT TUBES WEEKLY AND AFTER EACH SIGNIFICANT RAINFALL EVENT (1/2 INCH OR GREATER). REMOVE ACCUMULATED SEDIMENT AND ANY DEBRIS. THE
SEDIMENT TUBE MUST BE REPLACED IF CLOGGED OR TORN. IF PONDING BECOMES EXCESSIVE, THE TUBE MAY NEED TO BE REPLACED WITH A LARGER DIAMETER OR A
DIFFERENT MEASURE. THE TUBE NEEDS TO BE REINSTALLED IF UNDERMINED OR DISLODGED. THE SEDIMENT TUBE SHALL BE INSPECTED UNTIL LAND DISTURBANCE IS
COMPLETE AND THE AREA ABOVE THE MEASURE HAS BEEN PERMANENTLY STABILIZED.
SILT FENCE ROCK OUTLET DETAIL TEMPORARY DIVERSION SWALE DETAIL SEDIMENT TUBE DETAIL
NOT TO SCALE NOT TO SCALE NOT TO SCALE
LIMITS OF W2
�
DISTURBANCE 2 ?2END OF FLARED a 1 1f
SECTION 0 % SLOPE COMPACTED 10 FT MIN. 1 FT MIN.
EMBANKMENT a DEPTH i
SILT FENCE i�l�url u�lll_IIII=1ul=1u�
4 FT MIN.
MAXIMUM SPACE BETWEEN --�2405 , - _ :77 - III 1p _ V MIN. �r°� ��� NONWOVEN
00 EOTE E
SIDE SLOPE F �� t� �i 19 IN MIN. DEPTH
SLOPE STEEPNESS SILT FENCE ROWS OR J-HOOKS 1 6, 1 MIN. OF TRAP/BASIN 0�v��' 4 FT MIN. OF CLASS I RIPRAP
(FT.) I TYPE 2 GEOTEXTILE FILTE FABRIC LAP (IF 2:1 OR FLATTER
2:1 (50%) 25 _ 2404- --- ' ELEVATION NEEDED) r�� . TRAP/BASIN 10 FT MIN.
3:1 (33%) 50 p�sc ' BOTTOM0 FT MIN. ENTRANCE E SECTION CROSS SECTION
4.1 (25%) 75 "2403 M gRGF EXIT
SECTION I T
5:1 OR FLATTER (20%) 1100 � 30 a a �0% SLOPE
B
o V NATURAL GRADE 4 10 FT MIN.
" 2402 �� ' z n3 B B 53 RIP RAP TRAP BASIN NONWOVEN
J _ BOTTOM 4 GEOTEXTILE
2 2 _ 19 IN MIN. DEPTH
p _ OF CLASS I RIPRAP
-- 2401 H 4 I I� = ISOMETRIC VIEW
sc q 1, H PROFILE ALONG CENTERLINE
---2400 W1 inn T(THICKNESS)
SILT FENCE PROVIDE SILT FENCE END OF APRON
OUTLET(TYP.) OUTLETS AT EACH LAYER OF TYPE 2 GEOTE TILE RIPRAP INFLOW PROTECTION
10, J-HOOK TO RELEASE PLAN MINIMUM H=2/3 * PIPE DIAMETER FILTER FABRIC DESIGN AND CONSTRUCTION NOTES
�...�.,i RUNOFF AWAY FROM
20' WORK AREA(TYP.) SECTION B-B 1. PREPARE THE SUBGRADE FOR RIPRAP AND FILTER TO THE REQUIRED LINES ,AND GRADES SHOWN ON THE PLANS. COMPACT ANY FILL
REQUIRED IN THE SUBGRADE TO A DENSITY APPROXIMATING THAT OF THE SURROUNDING UNDISTURBED MATERIAL OR OVERFILL DEPRESSIONS
WITH RIPRAP. REMOVE BRUSH, TREES, STUMPS, AND OTHER OBJECTIONABLE MATERIAL. CUT THE SUBGRADE SUFFICIENTLY DEEP THAT THE
SEE SHEETS OOG-005 AND OOG-006 FOR OUTLET PROTECTION SIZING FINISHED GRADE OF THE RIPRAP WILL BE AT THE ELEVATION OF THE SURROUNDING AREA. CHANNELS SHOULD BE EXCAVATED SUFFICIENTLY
SILT FENCE J-HOOK --� TO ALLOW PLACEMENT OF THE RIPRAP IN A MANNER SUCH THAT THE FINISHED INSIDE DIMENSIONS AND GRADE OF THE RIPRAP MEET DESIGN
DESIGN AND CONSTRUCTION NOTES SPECIFICATIONS.
RIPRAP OUTLET PROTECTION 2. PLACE THE FILTER BLANKET IMMEDIATELY AFTER THE GROUND FOUNDATION IS PREPARED. FOR GRAVEL, SPREAD FILTER STONE IN A UNIFORM
1. THE PROPER OPERATION OF SILT FENCE DEPENDS ON THE ABILITY TO TEMPORARILY POND RUNOFF BEHIND THE FENCE, ALLOWING TIME FOR DESIGN AND CONSTRUCTION NOTES LAYER TO THE SPECIFIED DEPTH. WHERE MORE THAN ONE LAYER OF FILTER MATERIAL IS USED, SPREAD THE LAYERS WITH MINIMAL MIXING.
SEDIMENT TO SETTLE. SILT FENCE IS NOT A FILTER. IF RUNOFF FLOWS AROUND THE END(S), THE SILT FENCE FAILS TO FUNCTION. IT MUST 3. PLACE THE SYNTHETIC FILTER FABRIC DIRECTLY ON THE PREPARED FOUNDATION. OVERLAP THE EDGES BY AT LEAST 12 INCHES, AND SPACE
BE PLACED WHERE IT WILL STORE WATER - OFTEN TIMES ALONG A SLOPE A J-HOOK SHAPE IS REQUIRED TO CREATE A STORAGE AREA. 1. ENSURE THAT THE SUBGRADE FOR THE FILTER AND RIPRAP FOLLOWS THE REQUIRED LINES AND GRADES SHOWN IN THE PLAN. COMPACT ANY FILL REQUIRED ANCHOR PINS EVERY 3 FEET ALONG THE OVERLAP. BURY THE UPSTREAM END OF THE CLOTH A MINIMUM OF 12 INCHES BELOW GROUND
LONG RUNS SHOULD BE AVOIDED, AND BROKEN UP INTO SMALLER SEGMENTS. IN THE SUBGRADE TO 95% MAXIMUM DRY DENSITY PER ASTM D-1557 OR GREATER. LOW AREAS IN THE SUBGRADE ON UNDISTURBED SOIL MAY ALSO BE AND WHERE NECESSARY, BURY THE LOWER END OF THE CLOTH OR OVERLAP WITH THE NEXT SECTION AS REQUIRED. TAKE CARE NOT TO
2. J-HOOKS SHALL BE USED WHENEVER THE SILT FENCE LINE IS INSTALLED AT AN ANGLE OF 30 DEGREES OR GREATER FROM PARALLEL TO FILLED BY INCREASING THE RIPRAP THICKNESS. DAMAGE THE CLOTH WHEN PLACING RIPRAP. IF DAMAGE OCCURS, REMOVE THE RIPRAP AND REPAIR THE SHEET BY ADDING ANOTHER LAYER
THE CONTOURS 2. THE RIPRAP AND GRAVEL FILTER MUST CONFORM TO THE SPECIFIED GRADING LIMITS SHOWN ON THE PLANS. OF FILTER MATERIAL WITH A MINIMUM OVERLAP OF 12 INCHES AROUND THE DAMAGED AREA. IF EXTENSIVE DAMAGE IS SUSPECTED, REMOVE
3. SILT FENCE INSTALLED IN SHORTER RUNS WITH "J-HOOKS" TO AVOID CONCENTRATION OF FLOWS AT ONE LOCATION BY TRAPPING RUNOFF AT 3. FILTER CLOTH, WHEN USED, MUST MEET DESIGN REQUIREMENTS AND BE PROPERLY PROTECTED FROM PUNCHING OR TEARING DURING INSTALLATION. REPAIR AND REPLACE THE ENTIRE SHEET. WHERE LARGE STONES ARE USED, OR MACHINE PLACEMENT IS DIFFICULT, A 4-INCH LAYER OF FINE
MULTIPLE POINTS ALONG A SLOPE. ANY DAMAGE BY REMOVING THE RIPRAP AND PLACING ANOTHER PIECE OF FILTER CLOTH OVER THE DAMAGED AREA. ALL CONNECTING JOINTS SHOULD GRAVEL OR SAND MAY BE NEEDED TO PROTECT THE FILTER CLOTH.
4. START DOWN-GRADIENT SILT FENCE (LINE AS CLOSE AS POSSIBLE TO UP-GRADIENT J-HOOK 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. PLACEMENT OF RIPRAP SHOULD FOLLOW IMMEDIATELY AFTER PLACEMENT OF THE FILTER. PLACE RIPRAP SO THAT IT FORMS A DENSE,
5. TYPICAL J-HOOK DIMENSIONS MINIMUM WIDTH IS RECOMMENDED AT 20FT WITH A DEPTH OF 10FT. WHERE SPACE IS LIMITED (E.G., ALONG 4. RIPRAP MAY BE PLACED BY EQUIPMENT, BUT TAKE CARE TO AVOID DAMAGING THE FILTER. WELL-GRADED MASS OF STONE WITH A MINIMUM OF VOIDS. THE DESIRED DIISTRIBUTION OF STONES THROUGHOUT THE MASS MAY BE
NARROW RIGHTS OF WAY), NARROWER HOOKS CAN BE USED WITH A HIGHER SPACING FREQUENCY. 5. THE (MINIMUM THICKNESS OF THE RIPRAP SHOULD BE 1.5 TIMES THE MAXIMUM STONE DIAMETER. OBTAINED BY SELECTIVE LOADING AT THE QUARRY, AND CONTROLLED DUMPING DURING FINAL PLACEMENT. PLACE RIPRAP TO ITS FULL
6. RIPRAP MAY BE FIELD STONE OR ROUGH QUARRY STONE. IT SHOULD BE HARD, ANGULAR, HIGHLY WEATHER-RESISTANT AND WELL GRADED. THICKNESS IN ONE OPERATION. DO NOT PLACE RIPRAP BY DUMPING THROUGH ICHUTES OR OTHER METHODS THAT CAUSE SEGREGATION OF
STONE SIZES. TAKE CARE NOT TO DISLODGE THE UNDERLYING BASE OR FILTER WHEN PLACING THE STONES. THE TOE OF THE RIPRAP SLOPE A
SILT FENCE J-HOOK MAINTENANCE NOTES 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 SHOULD BE KEYED TO A STABLE FOUNDATION AT ITS BASE. THE TOE SHOULD BE EXCAVATED TO A DEPTH ABOUT 1.5 TIMES THE DESIGN
RECEIVING AREA OR SLIGHTLY BELOW IT. THICKNESS OF THE RIPRAP, AND SHOULD EXTEND HORIZONTALLY FROM THE SLOPE. THE FINISHED SLOPE SHOULD BE FREE OF POCKETS OF
1. INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REQUIRED REPAIRS IMMEDIATELY. 8. ENSURE THAT THE APRON IS PROPERLY ALIGNED WITH THE RECEIVING STREAM OR CHANNEL AND PREFERABLY STRAIGHT THROUGHOUT ITS LENGTH. IF A SMALL STONE OR CLUSTERS OF LARGE STONES. HAND PLACING MAY BE NECESSARY TO ACHIEVE THE PROPER DISTRIBUTION OF STONE SIZES
2. SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY. CURVE IS NEEDED TO FIT SITE CONDITIONS, PLACE IT IN THE UPPER SECTION OF THE APRON. TO PRODUCE A RELATIVELY SMOOTH, UNIFORM SURFACE. THE FINISHED GRADE OF THE RIPRAP SHOULD BLEND WITH THE SURROUNDING
3. REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON 9. IMMEDIATELY AFTER CONSTRUCTION, STABILIZE ALL DISTURBED AREAS WITH VEGETATION. AREA. NO OVERFALL OR PROTRUSION OF RIPRAP SHOULD BE APPARENT.
THE FENCE. TAKE ARE TO AVOID UNDERMINING THE FENCE DURING CLEANOUT. RIPRAP INFLOW PROTECTION MAINTENANCE NOTES
4. REMOVE ALL FENCING MATERIALS AND UNSTABLE SEDIMENT DEPOSITS AND BRING THE AREA TO GRADE AND STABILIZE IT AFTER THE RIPRAP OUTLET PROTECTION MAINTENANCE NOTES 1. IN GENERAL, ONCE A RIPRAP INSTALLATION HAS BEEN PROPERLY DESIGNED AND INSTALLED IT REQUIRES VERY LITTLE MAINTENANCE. RIPRAP SHOULD BE INSPECTED
CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED. PERIODICALLY FOR SCOUR OR DISLODGED STONES. CONTROL OF WEED AND BRUSH GROWTH MAY BE NEED IN SOME LOCATIONS.
1. 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.
SILT FENCE J-HOOKS DETAIL RIPRAP OUTLET PROTECTION DETAIL RIPRAP INFLOW PROTECTION DETAIL
NOT TO SCALE NOT TO SCALE NOT TO SCALE
PROJECT MANAGER V. HAYNES, PE
CARO
- PIEDMONT LITHIUM CAROLINAS INC. EROSION CONTROL DETAILS
��•'• •' ' ' CAROLINA LITHIUM PROJECT
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5 3/13/2024 REVISED PER DEMLR COMMENTS _ S AL
4 1/23/2023 REVISED PER DEMLR COMMENTS 3 LITHIUM HYDROXIDE CONVERSION PLANT
0 T PIE3 5/31/2022 REVISED PER DEMLR COMMENTS �' �'��•'•• GIN �:•°•a GASTON COUNTY NORTH CAROLING SHEET
HDR Engineering Inc.of the Carolinas 2 12/08/2021 REVISED PER DEMLR COMMENTS ',,FR/••••••••• Py .'3 FILENAME - OOG-009
440 S.Church Street, Suite 1200 �'K'• �s��3/13/2024
U Charlotte,INC 28202-2075 1 8/27/2021 MINING PERMIT SCALE - N.T.S. O�G��09
704.338.6700 ISSUE DATE DESCRIPTION PROJECT NUMBER 10302238
N.C.B.E.L.S.License Number:F-0116