NCG021036_Scanned Site Plans 4_20240318

TEMPORARY/PERMANENT
6=W� FABRIC GRASS SPECIFICATION SKIMMER BASIN CONSTRUCTION SPECIFICATION SITE WORK NOTES: >-
1. THE CONTRACTOR SHALL VISIT THE SITE TO BECOME FAMILIAR WITH FIELD
8 W � � MESH ............:_._____ _.� ..�__._.._..___ 1. CLEAR, GRUB, AND STRIP THE AREA UNDER THE EMBANKMENT OF ALL VEGETATION
CONSTRUCTION CONDITIONS.
}
----STEEL POST 1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER 2. CONTRACTOR SHALL COORDINATE WORK WITHIN NCDOT AND LOCAL RIGHT
r ADVERSE SOIL CONDITIONS. SKIMMER NOTE: AND ROOT MAT, REMOVE ALL SURFACE SOIL CONTAINING HIGH AMOUNTS OF ORGANIC OF WAYS WITH PROPER AUTHORITIES AND SHALL MEET ANY REQUIREMENTS
WIRE MESH FOR STANDARD FABRIC MATTER AND STOCKPILE OR DISPOSE OF IT PROPERLY. HAUL ALL OBJECTIONABLE AS TO TRAFFIC CONTROL AND CONNECTION TO EXISTING STREETS.
- 2. RIP THE ENTIRE AREA TO A 6 INCH DEPTH, SKIMMER MUST FLOAT ON TOP OF
x z STANDARD OR EXTRA STRENGTH MATERIAL TO THE DESIGNATED DISPOSAL AREA. PLACE TEMPORARY SEDIMENT
MIN. 14 GA. o < �, 3. REMOVE ALL ROCKS, ROOTS AND OTHER OBSTRUCTIONS LEAVING SURFACES WATER TO WORK PROPERLY. CONTROL MEASURES BELOW BASIN BS NEEDED. 3. CLEARING AND GRUBBING: REMOVE ALL TREES AS REQUIRED UNLESS
6x6 MESH FOR 1 � �w cr FILTER FABRIC SMOOTH AND UNIFORM. VENT
04 t m CONTRACTOR SHALL VERIFY THAT OPENING FOR 2. ENSURE THAT FILL MATERIAL FOR THE EMBANKMENT IS FREE OF ROOTS, WOODY OTHERWISE NOTED TO REMAIN, STUMPS, ROOTS, SHRUBBERY, ASPHALT,
STANDARD FABRIC 00 N 4. APPLY AGRICULTURAL LIME AND FERTILIZER UNIFORMLY AND MIX WITH SOIL. THE BARREL LENGTH WILL ALLOW WATER ENTRY VEGETATION, ORGANIC MATTER, AND OTHER OBJECTIONABLE MATERIAL. PLACE THE FILL CONCRETE, STRUCTURES, BURIED UTILITIES, STORAGE TANKS, ETC. WITHIN Z
IN LIFTS NOT TO EXCEED 9 INCHES, AND MACHINE COMPACT IT. OVER FILL THE LIMITS OF CONSTRUCTION. 0 �
DIRECTION OF WATER FLOW LIME: 45 LBS, PER 1000 S.F. SKIMMER TO FLOAT AT EMERGENCY 4. STRIPPING: BEFORE EXCAVATING OR FILLING, REMOVE ALL TOPSOIL,
9,
771
PHOSPHOROUS: 2d LBS PER 1000 S.F. EMBANKMENT 6 INCHES TO ALLOW FOR SETTLEMENT.
). P" �. - --••---- SPILLWAY ELEVATION. WOOD, LEAVES, AND ANY OTHER UNSUITABLE MATERIAL.
U" Q FERTILIZER: 17 LBS, PER 1000 S.F. 3. SHAPE THE BASIN TO THE SPECIFIED DIMENSIONS. PREVENT THE SKIMMING DEVICE n- ANCHOR FABRIC SKIRT 5• CONTINUE TILLAGE UNTIL. A WELL PULVERIZED, FIRM, UNIFORM SEED BED is FROM SETTLING INTO THE MUD BY EXCAVATING A SHALLOW PIT UNDER THE SKIMMER 5, MUCKING: REMOVE ANY SOFT, ORGANIC SILT MATERIALS AND EXISTING Z
o PREPARED 4-6 INCHES DEEP. BURIED CONSTRUCTION DEBRIS AS REQUIRED AND FILL TO SUBGRADE cn
I � MIN. 8'° DEEP & 4" WIDE, � OR PROVIDING A LOW SUPPORT UNDER THE SKIMMER OF STONE OR TIMBER. E CLa
z 6. SEED ON A FRESHLY PREPARED SEED BED AND COVER SEED LIGHTLY. 4. PLACE THE BARREL TYPICALLY 4-INCH SCHEDULE 40 PVC PIPE ON A FIRM, ELEVATIONS WITH A CLEAN SELECT-FILL COMPACTED AS SPECIFIED, L..J p }-
2 - 3 LBS PER 1000 S.F. (SEE MIXTURE BELOW 6, DISPOSAL: CLEARED, GRUBBED, STRIPPED OR EXCAVATED SPOIL SHALL
7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. OPENING FOR WATER ENTRY SMOOTH FOUNDATION OF IMPERVIOUS SOIL. DO NOT USE PERVIOUS MATERIAL a�3 0
SUCH AS SAND, GRAVEL, OR CRUSHED STONE AS BACKFILL AROUND THE PIPE. BE REMOVED FROM SITE AND DISPOSED OF IN ACCORDANCE WITH ALL j
GRAIN STRAW & HAY AT 75 7O 1dO LBS PER 1000 S.F. APPLICABLE LOCAL AND STATE CODES. U"•I tl)
WOOD CHIPS AT 500 LBS. PER 1000 S.F. PLACE THE FILL MATERIAL AROUND THE PIPE SPILLWAY IN 4-INCH LAYERS AND Of m
7. BORROW MATERIAL; THE CONTRACTOR SHALL FURNISH BORROW
NOTES: JUTE & MESH A5 PER MANUFACTURER -_ FLOAT COMPACT IT UNDER AND AROUND THE PIPE TO AT LEAST THE SAME DENSITY AS THE MATERIAL REQUIRED FROM OFF SITE AND OBTAIN ALL REQUIRED PERMITS �
1. SYN, FENCE FABRIC SHALL BE MIN. OF 30" IN WIDTH B. ASPHALT FOR ANCHORING MULCH SHALL BE TYPE SS-1 EMULSION AND FLEXIBLE JOINT ADJACENT EMBANKMENT. CARE MUST BE TAKEN NOT TO RAISE THE PIPE FROM THE ASSOCIATED WITH BURROW OPERATIONS. o (�
FIRM CONTACT WITH ITS FOUNDATION WHEN COMPACTING UNDER THE PIPE HAUNCHES. B. FILL AND COMPACTION: AFTER STRIPPING THOSE AREAS DESIGNATED TO
- WITH 30 LB/IN TENSILE STRENGTH FOR STANDARD FABRIC APPLIED AT A RATE OF 1000 GAL. PER ACRE FOR SLOPE STABILIZATION, BARREL PIPE RECEIVE FILL SHOULD BE PROOFROLLED. THE TOP 8" OF SUBGRADE SHALL � �
AND 50 LB/IN FOR EXTRA STRENGTH. AND 150 GAL. PER TON OF STRAW FOR ANCHORING STRAW. PLACE A MINIMUM DEPTH OF 2 FEET OF COMPACTED BACKFILL OVER THE PIPE
9, INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEED REFER TO TABLE FOR REQUIRED LENGTH. N N
2. FABRIC SHALL BE CONTINUOUS LENGTH. 1F JOINTS ARE cc_ SfPILLWAY BEFORE CROSSING IT WITH CONSTRUCTION EQUIPMENT. IN NO CASE BE COMPACTED TO AT LEAST 98% OF MAXIMUM DENSITY AT OPTIMUM WITHIN THE PLANTING FaSUN, IF POSSIBLE. IF GRASS STAND S}iOULD BE
NECESSARY, LAP FABRIC POST TO POST. 5}HOULD THE PIPE CONDUIT BE INSTALLED BY CUTTING A TRENCH THROUGH THE DAM MOISTURE CONTENT. ANY AREA WHICH PUMPS OR RUTS EXCESSIVELY N
OVER 60% DAMAGED, REESTABLISH FOLLOWING ORIGINAL_ LIME, FERTILIZER SHOULD BE UNDERCUT AND REPLACED WITH A CLEAN, SILTY OR CLAYEY Q
3. STEEL POST SHALL. BE MIN 4' IN HEIIGHT AND BE OF THE AND SEEDING RATES. AFTER THE EMBANKMENT IS COMPLETE.
SELF FASTENER STEEL ANGLE TYPE, 10. CONSUL.T CONSERVATION INSPECTOR ON MAINTENANCE, TREATMENT, AND 5.. ASSEMBLE THE SKIMMER FOLLOWING THE MANUFACTURER INSTRUCTIONS, OR SAND HAVING A UNIFIED SOIL CLASSIFICATION OF SP, SM, OR SC. FILL
FERTILIZATION AFTER PERMANENT COVER IS ESTABLISHED. OUTLET END AS DESIGNED. MATERIAL 5" OUTSIDE OF BUILDING AREAS SHALL THEN BE PLACED IN p z
TEMPORARY SILT FENCE 11. SEED FOR TEMPORARY AND PERMANENT APPLICATIONS SHALL BE: CONNECT TO OUTLET 6., LAY THE ASSEMBLED SKIMMER ON THE BOTTOM OF THE BASIN WITH THE LAYERS NOT TO EXCEED 8" AND COMPACTED TO AT LEAST 95% OF THE m r
NTS r. FLEXIBLE JOINT AT THE INLET OF THE BARREL PIPE. ATTACH THE FLEXIBLE JOINT TO STANDARD PROCTOR MAXIMUM DRY DENSITY (ASTM D-698) WITH THE >_ �' >"
24% CARPET GRASS PIPE OR RISER• THE BARREL PIPE AND POSITION THE SKIMMER OVER THE EXCAVATED PIT OR UPPER 12 INCHES OF SUBGRADE BEING COMPACTED TO 98% OF THE (n W
24% E:.+�MUDA GRASS REFER TO TABLE FOR
20% TURF FESCUE 107. CREEPING [RED FESCUE REQUIRED DIAMETERSUPPORT. BE SURE TO ATTACH A ROPE TO THE SKIMMER AND ANCHOR IT TO THE STANDARD PROCTOR MAXIMUM DRY DENSITY. FILL MATERIALS WITHIN z Z
24% ANNUAL RYE GRAIN SIIDE OF THE BASIN. THIS WILL BE USED TO PULL THE SKIMMER TO THE SIDE FOR BUILDING AREAS TO A LINE OUTSIDE THE BUILDING AREAS SHALL BE M"`
*BERMUDA SEED SHALL BE HULLED FOR WARM WEATHER MAINTENANCE. PLACED IN LAYERS NOT TO EXCEED 8" AND COMPACTED TO AT LEAST 98%
PLANTING. PURITY OF SEED SHALL BE A MIN. of 987. AND 7„ EARTHEN SPILLWAYS---INSTALL THE SPILLWAY IN UNDISTURBED SOIL TO THE OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY (ASTM D-698) WITH 0
GERMINATION SHALL BE A MIN. OF 85%, GREATEST EXTENT POSSIBLE. THE ACHIEVEMENT OF PLANNED ELEVATIONS, GRADE, THE UPPER 12 INCHES OF SUBGRADE BEING COMPACTED IN 6 INCH +�
DESIGN WIDTH, AND ENTRANCE AND EXIT CHANNEL SLOPES ARE CRITICAL TO THE LAYERS TO 100% OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY. IN zGRADING. CONSULT CONSERVATION ENGINEER
ALL DISTURBED AREA SHALL BE SEEDED WITHIN a5 DAYS THE COMPLETION of STANDARD SKIMMER DETAIL FAI CL TN SUCCESSFUL OPERATION OF THE SPILLWAY. THE SPILLWAY SHOULD BE LINED AREAS WHERE NO STRUCTURAL FILL IS TO BE PLACED THE UPPER 12
A SOIL CONSERVATION SERVICE
CE FOR ST Q
WIITH LAMINATED PLASTIC OR IMPERMEABLE GEOTEXTILE FABRIC. THE FABRIC MUST BE INCHES OF IN-PLACE SUBGRADE SHOULD BE COMPACTED TO AT LEAST 98%
ADDITIONAL INFORMATION CONCERNING OTHER ALTERNATIVES FOR VEGETATION OF N.T.S. WIIDE AND LONG ENOUGH TO COVER THE BOTTOM AND SIDES AND EXTEND ONTO THE OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY. IF THE MATERIAL 15 m ...
DENUDED AREAS. THE: ABOVE VEGETATION RATES ARE THOSE WHICH DO WELL TOP OF THE DAM FOR ANCHORING IN A TRENCH. THE EDGES MAY BE SECURED WITH TOO DRY TO COMPACT TO THE REQUIRED DENSITY EACH LAYER SHALL BE m z
UNDEP. LOCAL CONDITIONS, OTHER SEEDING SCHEDULES MAY BE POSSIBLE. 8-INCH STAPLES OR PINS. THE FABRIC MUST BE LONG ENOUGH TO EXTEND DOWN WETTED IN ACCORDANCE WITH COMPACTION REQUIREMENTS. IF THE MATERIAL
- - THE SLOPE AND EXIT ONTO STABI...E GROUND. THE WIDTH OF THE FABRIC MUST BE IS TOO WET TO SECURE PROPER COMPACTION, IT SHALL BE HARROWED
J
ONE PIECE, NOT JOINED OR SPLICED; OTHERWISE WATER CAN GET UNDER THE REPEATEDLY OR OTHERWISE AERATED WITH SUITABLE EQUIPMENT UNTIL Q (,� Z
FABRIC, IF THE LENGTH OF THE FABRIC IS INSUFFICIENT FOR THE ENTIRE L-ENGTH OF OPTIMUM MOISTURE CONTENT IS OBTAINED, FILL SHALL BE PLACED IN SUCH � m- - ---- - - THE SPILLWAY, MULTIPLE SECTIONS, SPANNING THE COMPLETE WIDTH, MAY BE USED. A MANNER THAT THE SURFACE WILL DRAIN READILY AT ALL TIMES. SEE
NPDES STABILIZATION TIMEFRAMES TOP ��P THE UPPER SECTION(S) SHOULD OVERLAP THE LOWER SECTION(S) SO THAT WATER STRUCTURAL NOTES AND SOILS REPORT FOR ADDITIONAL REQUIREMENTS. W
- CANNOT FLOW UNDER THE FABRIC. SECURE THE UPPER EDGE AND SIDES OF THE 9• LAYOUT: THE CONTRACTOR SHALL PROVIDE ALL LAYOUT REQUIRED TO Q m p
SITE AREA DESCRIPTION STABILIZATION TIMEFRAME EXCEPTIONS - FABRIC IN A TRENCH WITH STAPLES OR PINS. (ADAPTED FROM "A MANIUAL. FOR CONSTRUCT HIS WORK.
PERIMETER DIKES, SWALES, DITCHES AND SLOPES 7 DAYS NONE �-i DESIGNING, INSTALLING AND MAINTAINING SKIMMER SEDIMENT BASINS," FEBRUARY, 10• THE CONTRACTOR 15 RESPONSIBLE FOR THE LOCATION AND PROTECTION
-~- 1999. 1. W. FAIRCLOTH & SON, OF EXISTING UTILITIES DURING CONSTRUCTION.
HIGH UAL_I WATER (HOW) 5 - BOTTOM + } 11. EXISTING BOUNDARY INFORMATION BY G15 & AERIAL PHOTOGRAPHY AND --
4� Q TY A ( Q ) LONE 7 DAYS NONE 1 �____ I 8, IN WATER INTO THE BASIN IN A MANNER TO PREVENT EROSION.
/ \ - .- __-. _ _.._. .. 3 _3 1 USE TEMPORARY SLOPE DRAINS OR DIVERSIONS WITH OUTLET PROTECTION TO DIVERT PROVIDED BY OWNER.
s0' SLOPES STEEPER THAN 3:1 7 DAYS IF SLOPES ARE 10' OR LESS IN LENGTH AND ARE NOT7=1
SEDIMENT LADEN WATER TO THE UPPER END OF THE POOL AREA TO IMPROVE BASIN 12, THE CONTRACTOR S ALL VERIFY DIMENSION'S AT JOBSITE. )
M!/V STEEPER THAN 2:11, 14 DAYS ARE ALLOWED TRAP EFFICIENCY (REFERENCES: RUNOFF C NTROL MEASURES AND OUTLET RESPONSIBLE FOR THE COORDINATION OF a
SLOPES 3:1 OR FLATTER _ __ 14 DAYS 7 DAYS FOR SLOPES GREATER THAN 50' IN LENGTH PROTECTION. RELOCATION OR DISCONNECTION OF ALL EXISTING UTILITIES WITH �..
APPLICABLE AGENCIES AND AUTHORITIES, W �, I
SEDIMENT BASIN SECTION 14. ALL PAVEMENT AND BASE MATERIALS AND WORKMANSHIP SHALL
� ALL OTHER AREAS WITH SLOPES FLATTER THAN �1;1 14 DAYS NUKE, EXCEPT FOR PERIMETERS AND HOW ZONES 9. EROSION CONTROL-CONSTRUCT THE STRUCTURE SO THAT THE DISTURBED AREA
5 F.� -_..... �_
���.. .- .._.�.._ _._ ..._._. CONFORM TO NCDOT STANDARDS.
gyp. N.T.S. IS MINIMIZED. DIVERT SURFACE WATER AWAY FROM BARE AREAS. COMPLETE THE 15, ALL AREAS SHALL BE GRADED FOR POSITIVE DRAINAGE. ✓'Ft EMBANKMENT BEFORE THE AREA IS CLEARED. STABILIZE "THE EMERGENCY SPILLWAY 16 CONTRACTOR SHALL NOTE THAT EARTHWORK QUANTITIES ARE HIS CC
EMBANKMENT AND ALL OTHER DISTURBED AREAS ABOVE THE. CREST OF THE RESPONSIBILITY, PLANS DO NOT REPRESENT A BALANCED EARTHWORKuj
PRINCIPAL SPILLWAY IMMEDIATELY AFTER CONSTRUCTION (REFERENCES: SURFACE CONDITION.
STABILIZATION). N
6" MIN. 10, INSTALL_ POROUS BAFFLES AS SPECIFIED IN PRACTICE 6.65, POROUS BAFFLES. Z � oc
N
GENERAL NOTES: CLASS A STONE 11, AFTER ALL THE SEDIMENT-PRODUCING AREAS HAVE BEEN PERMANENTLY ,Q r✓
2'" - 3" STABILIZED, REMOVE THE STRUCTURE AND ALL THE UNSTABLE SEDIMENT, EROSION CONTROL NOTES AND MAINTENANCE PLAN < + O C."
1 DETERMINE BORROW PIT DEWATERING BASIN SIZE USING
COARSE AGGREGATE SMOOTH THE AREA TO BLEND WITH THE ADJOINING AREAS ,AND STABILIZE PROPERLY 1. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED FOR
V = 8.0203 * Q * 7, WHERE V IS VOLUME (FTC), Q IS FILTRATION STABILITY AND OPERATION FOLLOWING EVERY RUNOFF-PRODUCING RAINFALL, � +-.•"
GEOTEXTILE (REFERENCES: SURFACE STABILIZATION),PUMP FLOW RATE (GPM), AND T IS DEWATERING TIME UM BUT IN NO CASE, LESS THAN ONCE EVERY WEEK AND WITHIN 24 HOURS OF CL C ! Q
USE MAXIMUM FLOW RATE OF 1d00 GPM AND A MINIMUM EVERY HALF-INCH RAINFALL. Q J1 DEWATERING TIME OF 2 HOURS. MAINTENANCE 2. ALL POINTS OF EGRESS WILL HAVE CONSTRUCTION ENTRANCES THAT WILL
TEMPORARY GRAVEL , , ' �
' RISER SHALL BE ANON-PERFORATED, SMOOTH OR CORRUGATED '� , r `�`" �� ' STONE ENERGY � + BE PERIODICALLY TOP-DRESSED WITH AN ADDITIONAL 2 INCHES OF #4 STONE
MATERIAL. WITH A F NON-PERFORATED,
RD OPTION. " STEEL POST INSPECT SKIMMER SEDIMENT BASINS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT TO MAINTAIN PROPER DEPTH. THEY WILL BE MAINTAINED IN A CONDITION TO
_ DIS5IPATOR
CONSTRUCTION ENTRANCE 3 1�����{"�� �I,` (0)NE-HALF INCH OR GREATER) RAINFALL EVENT AND REPAIR IMMEDIATELY. PREVENT MUD OR SEDIMENT FROM LEAVING THE SITE. IMMEDIATELY REMOVE
REMOVE SEDIMENT AND RESTORE THE BASIN TO ITS ORIGINAL DIMENSIONS WHEN OBJECTIONABLE MATERIAL SPILLED WASHED OR TRACKED ONTO THE
NTS CONSTRUCT THE COIR FIBER BAFFLE IN ACCORDANCE WITH ROADWAY �� � , SEDIMENT ACCUMULATES TO ONE-HALF THE HEIGHT OF THE FIRST BAFFLE. PULL_ CONSTRUCTION ENTRANCE OR ROADWAYS,
STANDARD DRAWING 1640.01 AND WITH MATERIAL. THAT MEETS THEY ; THE SKIMMER TO ONE SIDE 80 THAT THE SEDIMENT UNDERNEATH IT CAN BE 3. DIVERSION DITCHES WILL BE CLEANED OUT IMMEDIATELY TO REMOVE
SPECIFICATIONS OF ROADWAY STANDARD 1060-14. �; y EXCAVATED. EXCAVATE THE SEDIMENT FROM THE ENTIRE BASIN, NOT JUST AROUND SEDIMENT OR OBSTRUCTIONS FROM THE FLOW AREA. THE DIVERSION RIDGES
' THE SKIMMER OR THE FIRST CELL. MAKE SURE VEGETATION GROWING IN THE BOTTOM WILL ALSO BE REPAIRED. SWALES MUST BE TEMPORARILY STABILIZED WITHIN
PROVIDE 5' STEEL POST OF THE SELF-FASTENER ANGLE STEEL TYPE. % '� �' OF THE BASIN DOES NOT HOLD DOWN THE SKIMMER, 21 CALENDAR DAYS OF CEASE OF ANY PHASE OF ACTIVITY ASSOCIATED WITH A
INSTALL STEEL POSTS WITH NO MORE THAN 3' OF THE POST APPEARING y ice , /
SWALE.
ABOVE THE GROUND. % -; 'e REPAIR THE BAFFLES IF THEY ARE DAMAGED. RE-ANCHOR THE BAFFLES IF WATER 4. SEDIMENT WILL BE REMOVED FROM BEHIND THE SEDIMENT FENCE WHEN
ATTACH THE COIR FIBER MAT TO THE STEEL POSTS WITH WIRE OR 1/4 "L- IS FLOWING UNDERNEATH OR AROUND THEM. IT BECOMES HALF FILLED. THE SEDIMENT FENCE WILL BE REPAIRED AS
*/a�
NECESSARY TO MAINTAIN A BARRIER. STAKES MUST BE STEEL, STAKE
OTHER ACCEPTABLE MEANS AND STAPLED INTO THE BOTTOM AND SIDE ' ' "=2"W" MIN. RISER CLOGGED WITH TRASH AND THERE IS WA-ER IN THE BASIN, SPACING WILL BE 6 FEET MAX, WITH THE USE OF EXTRA STRENGTH FABRIC, N SLOPES OF THE BASIN WITH 12" STAPLES. '-+ 1F THE SKIMMER IS CLOG I
USUALLY JERKING ON THE ROPE WILL MAKE THE SKIMMER BOB UP AND DOWN AND WITHOUT WIRE BACKING. STAKE SPACING WILL BE 8 FEET MAX. WHEN �7_ x
N £DISLODGE THE DEBRIS AND RESTORE FLOW, IF THIS DOES NOT WORK, PULE_ THE STANDARD STRENGTH FABRIC AND WIRE BACKING ARE USED. 1F ROCK FILTERS
INSTALL TYPE 2 GEOTEXTILE ON SIDE SLOPES AND BOTTOM OF BASIN AT SKIMMER OVER TO 'THE SIDE OF THE BASIN AND REMOVE THE DEBRIS, ALSO CHECK ARE DESIGNED AT LOW POINTS IN THE SEDIMENT FENCE, THE ROCK WILL BE �INLET AS SHOWN IN THE DETAIL.
THE ORIFICE INSIDE THE SKIMMER TO SEE IF IT IS CLOGGED; IF SO REMOVE THE REPAIRED OR REPLACED IF IT BECOMES HALF-FULL OF SEDIMENT, NO LONGER
DEBRIS. DRAINS AS DESIGNED OR IS DAMAGED. U
USE THE TYPICAL SECTION SHOWN FOR THE BORROW PIT DEWATERING 5. ALL SEEDED AREAS WILL BE FERTILIZED, RESEEDED AS NECESSARY, AND P_+
BASIN As A GUIDE, THE BASIN MAY HAVE ANY TYPE CONFIGURATION AS e-EARTH DIKE IF THE SKIMMER ARM OR BARREL PIPE IS CLOGGED, THE ORIFICE CAN BE REMOVED MULCHED, ACCORDING TO SPECIFICATIONS ►N THE VEGETATIVE PLAN, TO � � I
L ONG AS SUFFICIENT VOLUME IS PROVIDED AND PROVISIONS ARE MADE FOR A NON-PERFORATED RISER. AND THE OBSTRUCTION CLEARED WITH A PLUMBER'S SNAKE OR BY--FLUSHING WITH MAINTAIN A VIGOROUS, DENSE VEGETATIVE COVER. ALL SLOPES WILL BE
PLAN WATER. BE SURE AND REPLACE THE ORIFICE BEFORE REPOSITIONING THE SKIMMER, STABILIZED WITHIN 21 CALENDAR DAYS. ALL 07HER AREAS WILL BE STABILIZED CAI P� t~
DO NO EXCEED 3,5 FT. IN HEIGHT FOR THE EARTH DIKES REQUIRED FOR
WITHIN 15 WORKING DAYS. : WATER QUALITY REQUIRES ALL SEEDED AREAS TOP BANK 38 EV, BORROW PIT DEWATERING BASIN,' TO 30' CHECK THE FABRIC LINED SPILLWAY FOR DAMAGE AND MAKE ANY REQUIRED WILL BE FERTILIZED, RESEEDED AS NECESSARY AND MULCHED ACCORDING TO
VARIES FROM REPAIRS WITH FABRIC THAT SPANS THE FULL WIDTH OF THE SPILLWAY. CHECK THE SPECIFICATIONS IN THE VEGETATIVE PLAN TO MAINTAIN A VIGOROUS, DENSE�-`�"'� THE BORROW PIT DEWATERING BASIN SIZE IS VARIABLE AND DEPENDENT
EMBANKMENT, SPILLWAYS, AND OUTLET FOR EROSION DAMAGE, AND INSPECT THE VEGETATIVE COVER. ALL PERIMETER DIKES, SWALES, HORIZONTAL TO 'DITCHES,
- �"•"
ON SPECIFIC SITE REQUIREMENTS AS WELL AS PROPOSED CONSTRUCTION % EMBANKMENT FOR PIPING AND SETTLEMENT. MAKE ALL NECESSARY REPAIRS PERIMETER SLOPES, ALL SLOPES STEEPER THAN 3 VERTICAL (3:1) AND ALL
OPERATIONS. 1 0'f 1 Ong IMMEDIATELY, REMOVE ALL TRASH AND OTHER DEBRIS FROM THE SKIMMER AND HIGH QUALITY WATER (HQW) ZONES SHALL BE ' 1 PROVIDED TEMPORARY OR
POOL AREAS.
MINE RECLAMA7IUN 11. PERMANENT STABILIZATION WITH GROUND COVER AS SOON AS PRACTICABLE BUT FkNAL NORMAL. WATER ELEVATION r
---- --- SUBMIT THE SIZE, LOCATION AND RISER PIPE MATERIAL FOR APPROVAL 1 1 IN ANY EVENT WITHIN SEVEN (7) CALENDAR DAYS FROM THE LAST
BACKSLUPE 3 -� AVERAGE as FREEZING WEATHER CAN RESULT IN ICE FORMING IN THE BASIN. SOME SPECIAL LAND-DISTURBING ACTIVITY. ALL OTHER DISTURBED AREAS SHALL BE PROVIDED
DEPTH = 25° PRIOR TO CONSTRUCTION. 1 1 tom} 4 PRECAUTIONS SHOULD BE TAKEN IN THE WINTER TO PREVENT THE SKIMMER FROM
PLUGGING WITH ICE. TEMPORARY OR PERMANENT STABILIZATION WITH GROUND COVER AS SOON AS
1�� PUMP THE EFFLUENT INTO THE BURROW T DEWATERING BASIN TO A PRACTICABLE BUT IN ANY EVENT WITHIN FOURTEEN (14) CALENDAR DAYS FROM
2 __.. .. ._.___ __ MAXIMUM DEPTH OF 6 IN, BELOW TOP OF THE EARTH DIKE. '- ".,.,,
NCLASSIFIED THE LAST LAND-DISTURBING ACTIVITY. r--I
6
BOTTOM ELEV. VARIES * EARTH MATERIAL ANTI-SEEP
PROVIDE A STONE ENERGY DISSIPATER PAD AT THE OUTLET OF THE r`� STEEL POSTS COLLAR 6. FLOCCULANTS WILL BE USED TO ADDRESS TURBIDITY ISSUES. THE �.
PUMPS, TANKS, HOSES AND INJECT SYSTEMS WIILL BE CHECKED FOR
ACCORDANCE WITH ROADWAY STANDARD DRAWING 876.02 FOR OUTLET PUMP DISCHARGE HOSE AND OUTLET OF THE RISER BARREL IN VARIABLE PROBLEMS OR TURBID DISCHARGES DAILY.
MINE SLOPE & RECLAMATION CROSS SECTION COIR FILTER h■■■i �'
-.----- --- W/O DITCH. 7
NTS TYPICAL. SECTION VIEW � Z M
NOTES:
BAFFLE CONSTRUCTION SPECIFICATION 1-4
"
U 0
1, DEPTH LA MINE WILL BE DICTATED BY SUITABLE MATERIAL. �� ® OUTLET ZONE 1. GRADE T HE BASIN SO THAT THE BOTTOM IS LEVEL FRONT TO BACK AND SIDE v 7-
SLOPED
2. AT RECLAMATION ALL BANKS ABOVE NORMAL WATER WILL BE BORROW I"/ DEWATERING i FIRST CHAMBER SECOND CHAMBER x � -�
& GRADED AT 4:1 & STABIILIZED WITH GRASSING. INLET ZONE 25% OF SURFACE AREA TO SIDE. 9 z
25% OF SURFACE 25% OF SURFACE 25% OF SURFACE
AREA a
AREA AREA 2. INSTALL POSTS OR SAW HORSES ACROSS THE WIDTH OF THE SEDIMENT TRAP �� F
_ ._ (PRACTICE 6.62, SEDIMENT FENCE).
MIN. 20 -
3. STEEL POSTS SHOULD BE DRIVEN TO A DEPTH OF 24 INCHES, SPACED A
MAXIMUM OF 4 FEET APART, AND INSTALLED UP THE SIDES OF THE BASIN AS WELL.
�� - -- THE TOP OF THE FABRIC SHOULD BE 6 INCHES HIGHER THAN THE INVERT OF THE
5' CREST Vv'IDTI{
SPILLWAY. TOPS OF BAFFLES SHOULD BE 2 INCHES LOWER THAN THE TOP OF THE
EXTEND 9 GAUGE TO BERMS.
COMPACTED SOIL--- BASIN SIDE OR INSTALL r OUTLET STRUCTURE
ROADWAY T-POST TO ANCHOR i SEE DETAIL 4. INSTALL AT LEAST THREE ROWS OF BAFFLES BETWEEN THE INLET AND OUTLET
BAFFLE TO SIDE OF
DISCHARGE POINT. BASINS LESS THAN 20 FEET IN LENGTH MAY USE 2 BAFFLES.
DRAPE BAFFLE MATERIAL OVER WIRE BASIN AND SECURE TO CONTINUES
SD PIPE CON ��N ES
STRAND AND SECURE WITH PLASTIC TIES VERTICAL POST INFLOW TO OUTLET LOCATION 5, WHEN USING POSTS, ADD A SUPPORT WIRE OR ROPE ACROSS THE TOP OF THE I,ic:ence #1C-3641.AT POSTS AND ON WIRE EVERY 12" STRUCTURE
I� 4' MAX. -�� _ � _ � MEASURE TO PREVENT SAGGING.
r m m 6. WRAP POROUS MATERIAL, LIKE JUTE BACKED BY COIR MATERIAL, OVER A 22080
- HAUL. ��� SECTION y SAWHORSE OR THE TOP WIRE. HAMMER REPAR INTO THE SAWHORSE LEGS FOR
NTS -I RiPRAP OR ANCHORING. THE FABRIC SHOULD HAVE FIVE TO TEN PERCENT OPENINGS IN THE
9 GAUGE MIN. HIGH 3' MIN. VARIABLE DEPTH
_ SLOPE DRAIN I WEAVE. ATTACH FABRIC TO A ROPE AND A SUPPORT STRUCTURE WITH ZIP TIES, DES. JKB
TENSION WIRE STRAND ; WIRE, OR STAPLES.
SHALL T SECURED � SECURE BOTTOM OF BAFFLE TO I DRW EDB
I 7. THE BOTTOM AND SIDES OF THE FABRIC SHOULD BE ANCHORED IN A TRENCH
JPN
DRWN.
TO POST TO SUPPORT -" - - � EARTHEN EMBANKMENT _ _ j OR PINNED WITH 8-INCH EROSION CONTROL MATTING STAPLES.
BAFFLE MATERIAL. .1 I. GROUND WITH 12" STAPLES AT
12" MAXIMUM SPACING WITH STABILIZED SIDE CONNECT SKIMMER TO DATE 03fC76f24
BAFFLE MATERIAL SLOPES SKIMMER SEE DETAIL 8 DO NOT SPLICE THE FABRIC, BUT USE A CONTINUOUS PIECE ACROSS THE BASIN.
BAFFLE MATERIAL OUTLET ORIFICE.
..... REMOVE SKIMMER AND `ettttte
NOTES: _._. MAINTENANCE 0%
!F THE TEMPORARY SEDIMENT �--, RETURN BASIN AND re
1, MINING TO COMMENCE ON AN AS NEEDED BASIS. BASIN WILL BE CONVERTED TO A 11 GAUGE OUTLET STRUCTURE TO INSPECT BAFFLES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY . E °
2. RECLAMATION IS REQUIRED PRIOR TO MINE CLOSE OUT. PERMANENT STORMWATER BASIN LANDSCAPING STORMWATER DESIGN REQUIRED REPAIRS IMMEDIATELY. ��^` •0 a
EMERGENCY CONDITIONS @
3. NO PERMANENT STRUCTURES OR PERMANENT EMPLOYEES ARE PROPOSED ON SITE. OF GREATER DEPTH, THE BAFFLE STAPLE A
CONSTRUCTION
4. THE HOURS L OPERATION WELL ET MONDSU THRSUPPLEMENTED
NTFRIDAY FROM 7:30 AM TO 5:00 PM. WEIGHT SHOULD BE BASED ON SPILLWAY BE SURE TO MAINTAIN ACCESS TO THE BAFFLES. SHOULD THE FABRIC OF A BAFFLE __--,
- 5. BUFFERS SHALL BE NATURAL VEGETATION SUPPLEMENTED WITH PLANTINGS AS THE POOL DEPTH DURING USE AS _�_ COMPLETION. COLLAPSE, TEAR, DECOMPOSE, OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY, ® �iB2 ;.
NECESSARY TO MEET UDO REQUIREMENTS. A TEMPORARY SEDIMENT BASIN, III- I I IJ I I I III=)I I=I 10.
6. ALL REQUIREMENTS OF SECTION 5.3.7.G.VF THE LIDO SHALL BE MET. REMOVE SEDIMENT DEPOSITS WHEN IT REACHES HALF FULL TO PROVIDE ADEQUATE ® `' �% O
7. A 30FT ACCESS EASEMENT SHALL BE PROVIDED FOR ALL MINES TU ALLOW NOTE: INSTALL THREE (3) COIR FIBER BAFFLES POROUS BAFFLES IN A SEDIMENT BASIN. THE FLOW IS DISTRIBUTED EVENLY O '»�GINttl» li ,w
ACCESS TO HOOPER RD ALONG THE EXISTING HAUL ROAD, IN BASINS AT DRAINAGE OUTLETS WITH A ACROSS THE BASIN TO REDUCE FLOW RATES AND TURBULENCE, RESULTING STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE v®�cS' •p �Q•,®..
R8.OADINEONPRAORRYSHALL USE A WATER TRUCK TO CONTROL DUST ALONG THE HAUL SPACING OF 1 4 THE BASIN LENGTH. TWO 2` IN GREATER SEDIMENT RETENTION. BAFFLES. TAKE CARE TO AVOID DAMAGING THE BAFFLES DURING CLEANOUT. i4 HtK`�
AS I ( 1 SEDIMENT DEPTH SHOULD NEVER EXCEED HALF THE DESIGNED STORAGE DEPTH.
9. 'THE MINE WILL BE LEGALLY SUBDIVIDED WITH ITS OWN UNIQUE TAX PARCEL NUMBER. COIR FIBER BAFFLES CAN BE INSTALLED IN
THE BASINS LESS THAN 20 FT, IN LENGTH C AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED, REMOVE
WITH A SPACING OF 113 THE BASIN LENGTH. T I LSKIMMER' SEDIMENTBASIN & POROUS AFFLE DETAIL ALL BAFFLE MATERIALS AND UNSTABLE SEDIMENT {DEPOSITS, BRING THE AREA TO
GRADE, AND STABILIZE IT.
FIGURE 6.6b COIR FIBER BAFFLE DETAIL NTS
CROSS SECTION OF A POROUS BAFFLE IN
Cl .
A SEDIMENT BASIN. NOTE: SEE PLAN FOR BAFFLE LOCATIONS,