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Home My WebLink AboutNCG021049019 1 2 3 4 5 6 7 8 4' MAX. 19-GAUGE HARDWARE CLOTH - ------------- (4"MESH OPENINGS) -------------------- DISTURBED TIMBER MAT APPROACH AREA NCDOT#5 OR#57 -�"-' -10- �y D WASHED STON Z N r � ----- - - STREAM CHANNEL TEMPORARY SPAN �SRY, ----------- BRIDGE CROSSING FILTERED WATER n NCDOT#5 OR#57 WASHED STON WATTLES STREAM ISOMETRIC VIEW 7 CHANNEL TIMBER MAT APPROACH fir` DZM TOE OF FILL PERSPECTIVE VIEW INSTALL SIDEBOARDS OR UPSLOPE COMPOST FILTER STAKE SOCKS,OR OTHER TIMBER MAT MATERIAL TO PREVENT INLET PROTECTION APPROACH SEDIMENT FROM TEMPORARY DESIGN AND CONSTRUCTION NOTES SURFACE FLOW EXITING THE SIDES SPAN DIVERSION TO OF THE BRIDGE. BRIDGE SURFACE FLOW CROSSING DIVERSIION TO 1. UNIFORMLY GRADE A SHALLOW DEPRESSION APPROACHING THE INLET. TRAP TRAP 18' WATTLE TOP VIEW DOWNSLOPE STAKE 2. DRIVE 5-FOOT STEEL POSTS 2 FEET INTO THE GROUND SURROUNDING THE INLET. SPACE POSTS EVENLY AROUND THE PERIMETER OF THE INLET, A MAXIMUM OF 4 FEET APART. 3. SURROUND THE POSTS WITH WIRE MESH HARDWARE CLOTH. SECURE THE WIRE MESH TO THE STEEL POSTS AT THE TOP, MIDDLE, AND BOTTOM. ORIGINAL a PLACING A 2-FOOT FLAP OF THE WIRE MESH UNDER THE GRAVEL FOR ANCHORING IS RECOMMENDED. , , T EAMB K C 4. PLACE CLEAN GRAVEL (NC DOT #5 OR #57 STONE) ON A 2:1 SLOPE WITH A HEIGHT OF 16 INCHES AROUND THE WIRE, AND SMOOTH TO AN EVEN FILTER FABRIC FILTER FABRIC GRADE 5. ONCE THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED, REMOVE ACCUMULATED SEDIMENT, AND ESTABLISH FINAL GRADING ELEVATIONS. STREAM BED 18" WATTLE 6. COMPACT THE AREA PROPERLY AND STABILIZE IT WITH GROUNDCOVER. LONGITUDINAL SECTION 2' WOODEN STAKE INLET PROTECTION MAINTENANCE NOTES 1. INSPECT INLETS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (1/2 INCH OR GREATER) RAINFALL EVENT. CLEAR THE MESH WIRE OF ANY DEBRIS 2" OR OTHER OBJECTS TO PROVIDE ADEQUATE FLOW FOR SUBSEQUENT RAINS. TAKE CARE NOT TO DAMAGE OR UNDERCUT THE WIRE MESH DURING .--4'- SEDIMENT REMOVAL. REPLACE STONE AS NEEDED. INLET PROTECTION DETAIL 15 -,6 1 NOT TO SCALE 2, ' FRONT VIEW SEE INSET A - SEDIMENT CONTROL STONE TEMPORARY STREAM CROSSING STRUCTURAL STONE DESIGN AND CONSTRUCTION NOTES INVERT PIPE 1. TO BE USED FOR TEMPORARY ACCESS DURING CONSTRUCTION ONLY. 2. EROSION AND SEDIMENT CONTROL MEASURES, AS SHOWN ON PLANS AND DISTURBED AREA B SPECIFIED BY NCDEQ, MUST BE IMPLEMENTED PRIOR TO INSTALLATION OF A FLOW TEMPORARY CROSSING. 3. KEEP CLEARING AND EXCAVATION OF THE STREAM BANKS AND BED AND APPROACH SECTIONS TO A MINIMUM. I _ 4. DIVERT ALL SURFACE WATER FROM THE CONSTRUCTION SITE ONTO 4' UNDISTURBED AREAS ADJOINING THE STREAM. 5. KEEP STREAM CROSSINGS AT RIGHT ANGLES TO THE STREAM FLOW. 2"- 3" TRENCH 6. ALIGN ROAD APPROACHES WITH THE CENTER LINE OF THE CROSSING FOR A INSET A MINIMUM DISTANCE OF 20 FEET. RAISE BRIDGE ABUTMENTS AND CULVERT B FILLS A MINIMUM OF 1 FOOT ABOVE THE ADJOINING APPROACH SECTIONS TO PREVENT EROSION FROM SURFACE RUNOFF AND TO ALLOW FLOOD FLOWS 18" WATTLE TO PASS AROUND THE STRUCTURE. PLAN 7. STABILIZE ALL DISTURBED AREAS SUBJECT TO FLOWING WATER, INCLUDING DOUBLE ROW WATTLE SPACING PLANNED OVERFLOW AREAS, WITH RIPRAP OR OTHER SUITABLE MEANS IF DESIGN VELOCITY EXCEEDS THE ALLOWABLE FOR THE IN-PLACE SOIL \�/�//�\�� 8. ENSURE THAT BYPASS CHANNELS NECESSARY TO DEWATER THE CROSSING 1'-6" INVERT PIPE / //////�//// SITE AREA STABLE BEFORE DIVERTING THE STREAM. UPON COMPLETION OF / /\\/\\j\\j�\\,•� THE CROSSING, FILL, COMPACT, AND STABILIZE THE BYPASS CHANNEL APPROPRIATELY. 9. REMOVE TEMPORARY STREAM CROSSINGS IMMEDIATELY WHEN THEY ARE NO LONGER NEEDED. RESTORE THE STREAM CHANNEL TO ITS ORIGINAL WATTLE DESIGN AND CONSTRUCTION NOTES FLOW CROSS-SECTION, AND SMOOTH AND APPROPRIATELY STABILIZE ALL DISTURBED AREAS. 1. USE 2 FT. WOODEN STAKES WITH A 2 IN. BY 2 IN. NOMINAL CROSS SECTION. 10. ANY IN-STREAM SEDIMENT CONTROL MEASURES MUST BE REMOVED UPON STABILIZATION OF THE AREA. 2 WEDGE WATTLE I^TOMGROUNDUPSLOPE STAKES AND 4 DOWNSLOPE STAKES AT AN ANGLE TO 11. TEMPORARY CROSSINGS SHALL BE REMOVED AFTER PERMANENT CROSSINGS 3. PROVIDE STAPLES MADE OF 0.125 IN. DIAMETER STEEL WIRE FORMED INTO A U SHAPE NOT 4'-6" 24" PIPE MAX. ARE COMPLETE. LESS THAN 12" IN LENGTH. 12. MEASURES SHOWN ARE A MINIMUM. CROSSING TO BE BUILT ACCORDING TO 4. INSTALL STAPLES APPROXIMATELY EVERY 1 LINEAR FOOT ON BOTH SIDES OF WATTLE AND CONTRACTOR'S REQUIREMENTS FOR LOADS CROSSING STREAM. AT EACH END TO SECURE IT TO THE SOIL. CULVERT INLET PROTECTION SECTION B-B 5. FOR BREAKS ALONG LARGE SLOPES, USE MAXIMUM SPACING OF 25 FT. DESIGN AND CONSTRUCTION NOTES TEMPORARY STREAM CROSSING MAINTENANCE NOTES WATTLE MAINTENANCE NOTES 1. INSPECT TEMPORARY STREAM CROSSINGS ON A DAILY BASIS AND AFTER 1. INSPECT WATTLES AND CHANNELS FOR DAMAGE WEEKLY AND IMMEDIATELY FOLLOWING A 1. CLEAR THE AREA OF ALL DEBRIS THAT MIGHT HINDER EXCAVATION AND DISPOSAL OF SPOIL. RUNOFF-PRODUCING RAINS TO CHECK FOR BLOCKAGE IN CHANNEL, EROSION RAIN EVENT WHICH EXCEEDS 1.0 INCHES IN A 24-HOUR PERIOD. OF ABUTMENTS, CHANNEL SCOUR, RIPRAP DISPLACEMENT, OR PIPING. MAKE 2. ANTICIPATE SUBMERGENCE AND DEPOSITION ABOVE THE WATTLE AND EROSION FROM HIGH 2. INSTALL THE CLASS B OR CLASS I RIPRAP IN A SEMI-CIRCLE AROUND THE PIPE INLET. THE STONE SHOULD BE BUILT UP HIGHER ON EACH END ALL REPAIRS IMMEDIATELY TO PREVENT FURTHER DAMAGE TO THE FLOWS AROUND THE EDGES OF THE WATTLE. CORRECT ALL DAMAGE IMMEDIATELY. IF WHERE IT TIES INTO THE EMBANKMENT. THE MINIMUM CREST WIDTH OF THE RIPRAP SHOULD BE 3 FEET WITH A MINIMUM BOTTOM WIDTH OF 11 FEET. INSTALLATION. SIGNIFICANT EROSION OCCURS BETWEEN WATTLES, INSTALL A PROTECTIVE RIPRAP LINER IN THE MINIMUM HEIGHT SHOULD BE 2 FEET, BUT ALSO 1 FOOT LOWER THAN THE SHOULDER OF THE EMBANKMENT OR DIVERSIONS. 2. DAMAGED CROSSINGS SHALL BE REPAIRED WITHIN 24 HOURS OF THE THAT PORTION OF THE CHANNEL. 3. A 1 FOOT THICK LAYER OF INC DOT #5 OR #57 STONE SHOULD BE PLACED ON THE OUTSIDE SLOPE OF THE RIPRAP. INSPECTION AND BEFORE ANY SUBSEQUENT USE. 3. REMOVE SEDIMENT ACCUMULATED BEHIND THE WATTLES WHEN IT REACHES HALF THE HEIGHT OF THE LOG TO PREVENT DAMAGE TO CHANNEL VEGETATION, ALLOW THE CHANNEL TO DRAIN 4. THE SEDIMENT STORAGE AREA SHOULD BE EXCAVATED AROUND THE OUTSIDE OF THE STONE HORSESHOE 18 INCHES BELOW NATURAL GRADE. 3. SEDIMENT DEPOSITS ON THE CROSSING OR ITS APPROACHES SHALL BE THROUGH THE STRAW WATTLE AND PREVENT LARGE FLOWS FROM CARRYING SEDIMENT OVER REMOVED WITHIN 24 HOURS OF THE INSPECTION. THE WATTLE. 5. WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED, FILL DEPRESSION AND ESTABLISH FINAL GRADING ELEVATIONS, COMPACT AREA PROPERLY, AND STABILIZE WITH GROUNDICOVER. 4. AS SOON AS THE TEMPORARY CROSSING IS NO LONGER NEEDED, IT SHALL BE REMOVED. ALL MATERIALS SHALL BE DISPOSED OF PROPERLY AND A 6. ENSURE THAT TOP OF STONE IS 6 INCHES LESS THAN PARALLEL PAVEMENT EDGE IF IN A DITCH LINE. DISTURBED AREAS STABILIZED. CULVERT INLET PROTECTION MAINTENANCE NOTES 5. GEOTEXTILE FABRIC TO BE WRAPPED AROUND UNDERSIDE OF TEMPORARY 1. INSPECT ROCK PIPE INLET PROTECTION AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (1/2 INCH OR GREATER) RAINFALL EVENT AND REPAIR SPAN BRIDGE. IMMEDIATELY. REMOVE SEDIMENT AND RESTORE THE SEDIMENT STORAGE AREA TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE-HALF THE DESIGN DEPTH OF THE TRAP. PLACE THE SEDIMENT THAT IS REMOVED IN THE DESIGNATED DISPOSAL AREA AND REPLACE THE CONTAMINATED PART OF THE GRAVEL FACING. 2. CHECK THE STRUCTURE FOR DAMAGE. ANY RIPRAP DISPLACED FROM THE STONE HORSESHOE MUST BE REPLACED IMMEDIATELY. 3. AFTER ALL THE SEDIMENT-PRODUCING AREAS HAVE BEEN PERMANENTLY STABILIZED, REMOVE THE STRUCTURE AND ALL THE UNSTABLE SEDIMENT. SMOOTH THE AREA TO BLEND WITH THE ADJOINING AREAS AND PROVIDE PERMANENT GROUNDCOVER. CULVERT INLET PROTECTION DETAIL TEMPORARY STREAM CROSSING CONSTRUCTION DETAIL WATTLE DETAIL NOT TO SCALE NOT TO SCALE NOT TO SCALE PROJECT MANAGER V. HAYNES, PE " -- PIEDMONT LITHIUM CAROLINAS INC. ••�AR�� -- EROSION CONTROL DETAILS '�. �:�••FESS�o•••.'� CAROLINA LITHIUM PROJECT 5 3/13/2024 REVISED PER DEMLR COMMENTS S AL i RT4 1/23/2023 REVISED PER DEMLR COMMENTS 3 LITHIUM HYDROXIDE CONVERSION PLANT 3 5/31/2022 REVISED PER DEMLR COMMENTS - 9 '••., G i N PIE 0 " � ��,' GASTON COUNTY, NORTH CAROLINA SHEET HDR Engineering Inc.of the Carolinas 2 12/08/2021 REVISED PER DEMLR COMMENTS �, R/E K. NP��•�3/13/2024 FILENAME - OOG-010 440 S.Church Street, Suite 1200 i� 1 8/27/2021 MINING PERMITLITHIUM ��uin►►��Charlotte, NC28202-2075 SCALE - N.T.S. ooG�o� O 704.338.6700 ISSUE DATE DESCRIPTION PROJECT NUMBER 10302238 N.C.B.E.L.S.License Number:F-0116