NCG021049017

1 2 3 4 5 6 17 8
MIN. 14 GAUGE GALVANIZED WIRE FENCE
WITH MAX. 6" MESH SPACING SYNTHETIC FILTER FABRIC
(CERTIFIED TO MEET THE
p 4"x4" REINFORCED REQUIREMENTS OF ASTM D 6461)
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O M/ SAFETY POST CAP (TYP.
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OQ MGM ALL POSTS) 8'-0" MAXIMUM 5'STEEL O INTPEDSOR GALVANIZED
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Q C , _ (1.25 LB/LF)
ATTACH TO POSTS WITH
P.a WIRE OR PLASTIC ZIP TIES D
CD (MIN. 50 LBS TENSILE STRENGTH)
M N
GEOTEXTILE FABRIC TO STABILIZE FOUNDATION N ONSITE CONCRETE WASHOUT
(ESPECIALLY IMPORTANT WHERE WETNESS IS
GRADE
ANTICIPATED)
f 4 STRUCTURE WITH LINER e
ti
12'MIN.
CLEARLY MARKED
SIGNAGE NOTING
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00
10, DEVICE
2-3"DIAMETER WASHED PERSPECTIVE VIEW A HIGH COHESIVE & LOW MIN (18"X24" MIN.) N
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STONE,6"DEEP 0 0 C D CD 0/-OR
SANDBAGS (TYP.) FILTRATION SOIL BERM B 8" DOWN &4" FORWARD
Q Q STAPLES 0 CD CD ALONG THE TRENCH
Q Q Q> CONCRETE
TEMPORARY CONSTRUCTION ENTRANCE Q Q wasiHouT FRONT VIEW
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DESIGN ,AND CONSTRUCTION NOTES O CD CD 0 0 0 0
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1. CLEAR THE ENTRANCE AND EXIT AREA OF ALL VEGETATION, ROOTS, AND OTHER A CD 5' PAINTED OR GALVANIZED
STEEL POST
OBJECTIONABLE MATERIAL AND PROPERLY GRADE IT. CLEARLY MARKED B 4"x4" REINFORCED (1.25 LB/LF)
2. PLACE GRAVEL TO THE SPECIFIC GRADE AND DIMENSIONS SHOWN ON THE PLANS, CONCRETE
AND SMOOTH IT. PLAN WASHOUT SIGNAGE NOTING SAFETY POST CAP (TYP.
3. PROVIDE DRAINAGE TO CARRY WATER TO A SEDIMENT TRAP OR OTHER SUITABLE DEVICE (18"X24" MIN.) PLAN SANDBAGS (TYP.) ALL POSTS) MIN. 14 GAUGE GALVANIZED WIRE
OUTLET. OR STAPLES
FENCE WITH MAX. 6" MESH SPACING
4. USE GEOTEXTILE FABRICS BECAUSE THEY IMPROVE STABILITY OF THE FOUNDATION IN SANDBAGS (TYP.)
LOCATIONS SUBJECT TO SEEPAGE OR HIGH WATER TABLE. 10 MIL OR STAPLES SYNTHETIC FILTER FABRIC
5. PAD LOCATION: LOCATE CONSTRUCTION ENTRANCES AND EXITS TO LIMIT SEDIMENT PLASTIC LINING (CERTIFIED TO MEET THE
FROM LEAVING THE SITE AND TO PROVIDE MAXIMUM UTILITY BY ALL CONSTRUCTION 10 MIL HIGH COHESIVE & REQUIREMENTS OF ASTM D 6461)
VEHICLES. AVOID STEEP GRADES AND ENTRANCES AT CURVES IN PUBLIC ROADS. 1:1 SIDE LOW _
PLASTIC
6. WASHING: IF CONDITIONS AT THE SITE ARE SUCH THAT MOST OF THE MUD AND 1 1 SLOPE FILTRATION SOIL M N TRENCH IN SILT FENCE. BACKFILL
LINING (TYP.) NCDEQ TABLE 6.62a: MAXIMUM SLOPE LENGTH AND
SIDE BERM O AND COMPACT THOROUGHLY
SEDIMENT ARE NOT REMOVED BY VEHICLES TRAVELING OVER THE GRAVEL, THE TIRES SILT FENCE SANDBAGS (TYP.) �
SHOULD BE WASHED. WASHING SHOULD BE DONE ON AN AREA STABILIZED WITH SLOPE OR STAPLES SLOPE FOR EACH SEDIMENT FENCE IS APPLICABLE AFTER PLACEMENT.
CRUSHED STONE THAT DRAINS INTO A SEDIMENT TRAP OR OTHER SUITABLE (TYP.) 00
DISPOSAL AREA. A WASH RACK MAY ALSO BE USED TO MAKE WASHING MORE FLOW C
CONVENIENT AND EFFECTIVE. CD 00 �, SLOPE SLOPE LENGTH (FT) MAXIMUM AREA(SF)
TEMPORARY CONSTRUCTION ENTRANCE MAINTENANCE NOTES & � 2% 100 10,000 roo z
1. MAINTAIN THE GRAVEL PAD IN A CONDITION TO PREVENT MUD OR SEDIMENT FROM 3'-0" MIN. � GRADE
LEAVING THE CONSTRUCTION SITE. THIS MAY REQUIRE PERIODIC TOPDRESSING WITH MAX. MAX MIN. &X' 2 TO 5% 75 7,500 N
2-INCH STONE. AFTER EACH RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP 4" MIN.
SEDIMENT AND CLEAN IT OUT AS NECESSARY. IMMEDIATELY REMOVE ALL SECTION A-A SECTION B-B 5 TO 10% 50 5,000
OBJECTIONABLE MATERIALS SPILLED, WASHED, OR TRACKED ONTO PUBLIC ROADWAYS. NOTES: NOTES: 10 TO 20% 25 2,500
1.ACTUAL LOCATION DETERMINED IN FIELD. 1.ACTUAL LOCATION DETERMINED IN FIELD.
2.THE CONCRETE WASHOUT STRUCTURES SHALL BE MAINTAINED WHEN THE LIQUID 2•THE CONCRETE WASHOUT STRUCTURES SHALL BE MAINTAINED WHEN THE LIQUID AND/OR > 20% 15 1,500 SIDE VIEW
AND/OR SOLID REACHES 75%OF THE STRUCTURES CAPACITY. SOLID REACHES 75%OF THE STRUCTURES CAPACITY TO PROVIDE ADEQUATE HOLDING
CONSTRUCTION ENTRANCE DETAIL 3.CONICRETE WASHOUT STRUCTURE NEEDS TO BE CLEARLY MARKED WITH SIGNAGE CAPACITY WITH A MINIMUM 12 INCHES OF FREEBOARD.
NOTING DEVICE. 3.CONCRETE WASHOUT STRUCTURE NEEDS TO BE CLEARLY MARKED WITH SIGNAGE NOTING
NOT TO SCALE DEVICE.
BELOW GRADE WASHOUT STRUCTURE ABOVE GRADE WASHOUT STRUCTURE
12"OF NCDOT#5 NOT TO SCALE NOT TO SCALE
OR#57 WASHED STONE 1.5' SILT FENCE DESIGN AND CONSTRUCTION NOTES
CLASS B RIP-RAP ppQ�ap��Op 1. USE A SYNTHETIC FILTER FABRIC OF AT LEAST 95% BY WEIGHT OF POLYOLEFIN OR POLYESTER, WHICH IS CERTIFIED BY THE MANUFACTURER OR
pOpp� O��p SUPPLIER AS CONFORMING TO THE REQUIREMENTS IN ASTM D 6461. SYNTHETIC FILTER FABRIC SHOULD CONTAIN ULTRAVIOLET RAY INHIBITORS AND
$0� 2'MAX AT STABILIZERS TO PROVIDE A MINIMUM OF 6 MONTHS OF EXPECTED USABLE CONSTRUCTION LIFE AT A TEMPERATURE RANGE OF 1 TO 120 DEGREES
FILTER CLOTH pQ p �pvOp�"O ��p CENTER FAHRENHEIT.
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1.5'MIN pip pp 01 g5 ©moo op�pa 2. ENSURE THAT THE POSTS FOR SEDIMENT FENCES AREA 1.25 POUND/LINEAR FOOT MINIMUM STEEL WITH A MINIMUM LENGTH OF 5 FEET. MAKE SURE
9"MIN p CONCRETE WASHOUT THE STEEL POSTS HAVE PROJECTIONS TO FACILITATE FASTENING THE FABRIC.
4'TO6' DESIGN AND CONSTRUCTION NOTES 3 FOR NCHES.INFORCEMENT OF STANDARD STRENGTH FILTER FABRIC, USE WIRE FENCE WITH A MINIMUM 14 GAUGE AND MAXIMUM MESH SPACING OF 6
CROSS-SECTION VIEW
1. DO NOT DISCHARGE CONCRETE OR CEMENT SLURRY FROM THE SITE. 4. CONSTRUCT THE SEDIMENT BARRIER OF STANDARD STRENGTH OR EXTRA STRENGTH SYNTHETIC FILTER FABRICS.
2. DISPOSE OF, OR RECYCLE SETTLED, HARDENED CONCRETE RESIDUE IN 5. ENSURE THAT THE HEIGHT OF THE SEDIMENT FENCE DOES NOT EXCEED 24 INCHES ABOVE THE GROUND SURFACE. (HIGHER FENCES MAY IMPOUND
ACCORDANCE WITH LOCAL AND STATE SOLID WASTE REGULATIONS AND AT AN VOLUMES OF WATER SUFFICIENT TO CAUSE FAILURE OF THE STRUCTURE.) B
FILTER CLOTH L THE DISTANCE SUCH THAT POINTS
APPROVED FACILITY. 6. CONSTRUCT THE FILTER FABRIC FROM A CONTINUOUS ROLL CUT TO THE LENGTH OF THE BARRIER TO AVOID JOINTS. WHEN JOINTS AREA NECESSARY,
=
A AND B ARE OF EQUAL ELEVATION 3. MANAGE WASHOUT FROM MORTAR MIXERS IN ACCORDANCE WITH THE ABOVE ITEM SECURELY FASTEN THE FILTER CLOTH ONLY AT A SUPPORT POST WITH 4 FEET MINIMUM OVERLAP TO THE NEXT POST.
PLAN VIEW AND IN ADDITION PLACE THE MIXER AND ASSOCIATED MATERIALS ON IMPERVIOUS 7. SUPPORT STANDARD STRENGTH FILTER FABRIC BY WIRE MESH FASTENED SECURELY TO THE UPSLOPE SIDE OF THE POSTS. EXTEND THE WIRE MESH
oSgo BARRIER AND WITHIN LOT PERIMETER SILT FENCE.
°0 000
SUPPORT TO THE BOTTOM OF THE TRENCH. FASTEN THE WIRE REINFORCEMENT, THEN FABRIC ON THE UPSLOPE SIDE OF THE FENCE POST. WIRE OR
0000 00
o°°p°o PLASTIC ZIP TIES SHOULD HAVE MINIMUM 50 POUND TENSILE STRENGTH.
_ °Ooo A B 4. INSTALL TEMPORARY CONCRETE WASHOUTS PER LOCAL REQUIREMENTS, WHERE
L °°o°ate° YOURAPPLICAP ROV IF AN A ALTERYA E METHOD REVIEW OR PRODUCT
IS TO I BELOC USED,
STANDARD CONTACT 8• WHEN A WIRE MESH SUPPORT FENCE IS USED, SPACE POSTS A MAXIMUM OF 8 FEET APART. SUPPORT POSTS SHOULD BE DRIVEN SECURELY INTO
°°°°a"a�'oaoo DETAILS ARE NOT AVAILABLE, USE ONE OF THE TWO TYPES OF TEMPORARY THE GROUND A MINIMUM OF 24 INCHES.
CONCRETE WASHOUTS PROVIDED ON THIS DETAIL. 9. EXTRA STRENGTH FILTER FABRIC WITH 6 FEET POST SPACING DOES NOT REQUIRE WIRE MESH SUPPORT FENCE. SECURELY FASTEN THE FILTER
SIDE VIEW 5. DO NOT USE CONCRETE WASHOUTS FOR DEWATERING OR STORING DEFECTIVE FABRIC DIRECTLY TO POSTS. WIRE OR PLASTIC ZIP TIES SHOULD HAVE MINIMUM 50 POUND TENSILE STRENGTH.
CURB OR SIDEWALK SECTIONS. STORMWATER ACCUMULATED WITHIN THE WASHOUT 10. EXCAVATE A TRENCH APPROXIMATELY 4 INCHES WIDE AND 8 INCHES DEEP ALONG THE PROPOSED LINE OF POSTS AND UPSLOPE FROM THE
MAY NOT BE PUMPED INTO OR DISCHARGED TO THE STORM DRAIN SYSTEM OR BARRIER.
ROCK CHECK DAM RECEIVING SURFACE WATERS. LIQUID WASTE MUST BE PUMPED OUT AND 11. PLACE 12 INCHES OF THE FABRIC ALONG THE BOTTOM AND SIDE OF THE TRENCH.
DESIGN AND CONSTRUCTION NOTES REMOVED FROM PROJECT.
6. LOCATE WASHOUTS AT LEAST 50 FEET FROM STORM DRAIN INLETS AND SURFACE 12. BACKFILL THE TRENCH WITH SOIL PLACED OVER THE FILTER FABRIC AND COMPACT. THOROUGH COMPACTION OF THE BACKFILL IS CRITICAL TO SILT
WATERS UNLESS IT CAN BE SHOWN THAT NO OTHER ALTERNATIVES ARE FENCE PERFORMANCE.
1. PLACE STONE TO THE LINES AND DIMENSIONS SHOWN IN THE PLAN ON A FILTER FABRIC FOUNDATION. REASONABLY AVAILABLE. AT A MINIMUM, INSTALL PROTECTION OF STORM DRAIN 13. DO NOT ATTACH FILTER FABRIC TO EXISTING TREES.
2. KEEP THE CENTER STONE SECTION AT LEAST 9 INCHES BELOW NATURAL GROUND LEVEL WHERE THE DAM ABUTS THE INLET(S) CLOSEST TO THE WASHOUT WHICH COULD RECEIVE SPILLS OR OVERFLOW. 14. IF INSTALLING THE SEDIMENT FENCE USING THE SLICING METHOD, THE BASE OF BOTH END POSTS SHOULD BE AT LEAST ONE FOOT HIGHER THAN
CHANNEL BANKS. 7. LOCATE WASHOUTS IN AN EASILY ACCESSIBLE AREA, ON LEVEL GROUND AND THE MIDDLE OF THE FENCE. CHECK WITH A LEVEL IF NECESSARY. INSTALL POSTS 4 FEET APART IN CRITICAL AREAS AND 6 FEET APART ON
3. EXTEND STONE AT LEAST 1.5 FEET BEYOND THE DITCH BANK TO KEEP WATER FROM CUTTING AROUND THE ENDS OF THE INSTALL A STONE ENTRANCE PAD IN FRONT OF THE WASHOUT. ADDITIONAL STANDARD APPLICATIONS. INSTALL POSTS 2 FEET DEEP ON THE DOWNSTREAM SIDE OF THE SILT FENCE, AND AS CLOSE AS POSSIBLE TO THE
CHECK DAMS. CONTROLS MAY BE REQUIRED BY THE APPROVING AUTHORITY. FABRIC, ENABLING POSTS TO SUPPORT THE FABRIC FROM UPSTREAM WATER PRESSURE. (INSTALL POSTS WITH THE NIPPLES FACING AWAY FROM THE
4. SET SPACING BETWEEN DAMIS TO ASSURE THAT THE ELEVATION AT THE TOP OF THE LOWER DAM IS THE SAME AS THE 8. INSTALL AT LEAST ONE SIGN DIRECTING CONCRETE TRUCKS TO THE WASHOUT SILT FABRIC. ATTACH THE FABRIC TO EACH POST WITH THREE TIES, ALL SPACED WITHIN THE TOP 8 INCHES OF THE FABRIC. ATTACH THE FABRIC TO
EACH POST WITH THREE TIES, ALL SPACED WITHIN THE TOP 8 INCHES OF THE FABRIC. ATTACHED EACH TIE DIAGONALLY 45 DEGREES THROUGH THE
TOE ELEVATION OF THE UPPER DAM. IDENTIFY THIS E PROLOCJECT
LIMITS. POST SIGNAGE ON THE WASHOUT ITSELF TO FABRIC, WITH EACH PUNCTURE AT LEAST 1 INCH VERTICALLY APART. ALSO, EACH TIE SHOULD BE POSITIONED TO HANG ON A POST NIPPLE WHEN
5. PROTECT THE CHANNEL AFTER THE LOWEST CHECK DAM FROM HEAVY FLOW THAT COULD CAUSE EROSION. TIGHTENED TO PREVENT SAGGING. WRAP APPROXIMATELY 6 INCHES OF FABRIC AROUND THE END POSTS AND SECURE WITH 3 TIES. NO MORE THAN
CONCRETE WASHOUT MAINTENANCE NOTES 24 INCHES OF A 36 INCH FABRIC IS ALLOWED ABOVE GROUND LEVEL. THE INSTALLATION SHOULD BE CHECKED AND CORRECTED FOR ANY
6. MAKE SURE THE CHANNEL REACH ABOVE THE MOST UPSTREAM DAM IS STABLE. DEVIATIONS BEFORE COMPACTION. COMPACTION IS VITALLY IMPORTANT FOR EFFECTIVE RESULTS. COMPACT THE SOIL IMMEDIATELY NEXT TO THE SILT
7. ENSURE THAT OTHER AREAS OF THE CHANNEL, SUCH AS CULVERT ENTRANCES BELOW THE CHECK DAMS, ARE NOT 1. REMOVE LEAVINGS FROM THE WASHOUT WHEN AT APPROXIMATELY 75% CAPACITY FENCE FABRIC WITH THE FRONT WHEEL OF THE TRACTOR, SKID STEER, OR ROLLER EXERTING AT LEAST 60 POUNDS PER SQUARE INCH. COMPACT
SUBJECT TO DAMAGE OR BLOCKAGE FROM DISPLACED STONES. TO LIMIT OVERFLOW EVENTS. REPLACE THE TARP, SAND BAGS OR OTHER THE UPSTREAM SIDE FIRST, AND THEN EACH SIDE TWICE FOR A TOTAL OF 4 TRIPS.
TEMPORARY STRUCTURAL COMPONENTS WHEN NO LONGER FUNCTIONAL. WHEN 15. MAKE THE SILT FENCE STABLE FOR THE 10-YEAR PEAK STORM RUNOFF.
8. KEEP THE SIDE SLOPES OF THE DAM AT 2:1 OR FLATTER. UTILIZING ALTERNATIVE OR PROPRIETARY PRODUCTS, FOLLOW MANUFACTURER'S
ROCK CHECK DAM MAINTENANCE NOTES
INSTRUCTIONS.
2. AT THE COMPLETION OF THE CONCRETE WORK, REMOVE REMAINING LEAVINGS AND SILT FENCE MAINTENANCE NOTES
1. INSPECT CHECK DAMS AND CHANNELS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (1/2 INCH OR GREATER) DISPOSE OF IN AN APPROVED DISPOSAL FACILITY. FILL PIT, IF APPLICABLE, AND A
RAINFALL EVENT AND REPAIR IMMEDIATELY. CLEAN OUT SEDIMENT, STRAW, LIMBS, OR OTHER DEBRIS THAT COULD CLOG STABILIZE ANY DISTURBANCE CAUSED BY REMOVAL OF WASHOUT. 1. INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REQUIRED REPAIRS IMMEDIATELY.
THE CHANNEL WHEN NEEDED. 2. SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY.
2. ANTICIPATE SUBMERGENCE AND DEPOSITION ABOVE THE CHECK DAM AND EROSION FROM HIGH FLOS AROUND THE EDGES 3. REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE
OF THE DAM. CORRECT ALL DAMAGE IMMEDIATELY. IF SIGNIFICANT EROSION OCCURS BETWEEN DAMS, ADDITIONAL FENCE. TAKE ARE TO AVOID UNDERMINING THE FENCE DURING CLEANOUT.
MEASURES CAN BE TAKEN SUCH AS, INSTALLING A PROTECTIVE RIPRAP LINER IN THAT PORTION OF THE CHANNEL.
3. REMOVE SEDIMENT ACCUMULATED BEHIND THE DAMS AS NEEDED TO PREVENT DAMAGE TO CHANNEL VEGETATION, ALLOW 4. REMOVE ALL FENCING MATERIALS AND UNSTABLE SEDIMENT DEPOSITS AND BRING THE AREA TO GRADE AND STABILIZE IT AFTER THE CONTRIBUTING
THE CHANNEL TO DRAIN THROUGH THE STONE CHECK DAM, AND PREVENT LARGE FLOWS FROM CARRYING SEDIMENT OVER DRAINAGE AREA HAS BEEN PROPERLY STABILIZED.
THE DAM. ADD STONES TO DAMS AS NEEDED TO MAINTAIN DESIGN HEIGHT AND CROSS SECTION.
ROCK CHECK DAM DETAIL CONCRETE WASHOUT DETAIL SILT FENCE DETAIL
NOT TO SCALE NOT TO SCALE
NOT TO SCALE
PROJECT MANAGER V. HAYNES, PE
PIEDMONT LITHIUM CAROLINAS, INC.
cARO� ' EROSION CONTROL DETAILS
o�::oFEss/off..% CAROLINA LITHIUM PROJECT
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5 3/13/2024 REVISED PER DEMLR COMMENTS S
4 1/23/2023 REVISED PER DEMLR COMMENTS 3 LITHIUM HYDROXIDE CONVERSION PLANT
PIEDtAONT 3 5/31/2022 REVISED PER DEMLR COMMENTS '- 9••'•.')'G i NEF'�:'••
-,� �,. GASTON COUNTY, NORTH CAROLINA
HDR Engineering Inc.of the Carolinas 2 12/08/2021 REVISED PER DEMLR COMMENTS �� F�Q/ •������ • Py ���3/1.3/2024 FILENAME - OOG-008 SHEET
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y 440 S.Church Street,Suite 1200 1 8/27/2021 MINING PERMIT '�����ni�o��o►°°`°°°`
4 Charlotte,704338.6700 2075 ISSUE DATE DESCRIPTION PROJECT NUMBER 10302238 SCALE - N.T.S. OOG-008
N.C.B.E.L.S.License Number: F-0116