BENTON TRACT MINE - 03-29-21 - C3

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EROSION CONTROL NOTES AND MAINTENANCE PLAN
TEMPORARY/PERMANENT 1. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED FOR
GRASS SPECIFICATION STABILITY AND OPERATION FOLLOWING EVERY RUNOFF-PRODUCING RAINFALL,
BUT IN NO CASE, LESS THAN ONCE EVERY WEEK AND WITHIN 24 HOURS OF
QO EVERY HALF-INCH RAINFALL.
1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER 2. ALL POINTS OF EGRESS WILL HAVE CONSTRUCTION ENTRANCES THAT WILL N
v ADVERSE SOIL CONDITIONS. BE PERIODICALLY TOP-DRESSED WITH AN ADDITIONAL 2 INCHES OF #4 STONE Z 9
QJ� TO MAINTAIN PROPER DEPTH. THEY WILL BE MAINTAINED IN A CONDITION TO
2. RIP THE ENTIRE AREA TO A 6 INCH DEPTH. 0 Q �
SO. 3. REMOVE ALL ROCKS, ROOTS AND OTHER OBSTRUCTIONS LEAVING SURFACES PREVENT MUD OR SEDIMENT FROM LEAVING THE SITE. IMMEDIATELY REMOVE a � N
M/N SMOOTH AND UNIFORM. OBJECTIONABLE MATERIAL SPILLED WASHED OR TRACKED ONTO THE F N Q
4. APPLY AGRICULTURAL LIME AND FERTILIZER UNIFORMLY AND MIX WITH SOIL. CONSTRUCTION ENTRANCE OR ROADWAYS.
LIME: 45 LBS. PER 1000 S.F. 3. DIVERSION DITCHES WILL BE CLEANED OUT IMMEDIATELY TO REMOVE W Z H (n Z
PHOSPHOROUS: 20 LBS PER 1000 S.F. SEDIMENT OR OBSTRUCTIONS FROM THE FLOW AREA. THE DIVERSION RIDGES p O Q J
FERTILIZER: 17 LBS. PER 1000 S.F. WILL ALSO BE REPAIRED. SWALES MUST BE TEMPORARILY STABILIZED WITHIN
�} 5. CONTINUE TILLAGE UNTIL A WELL PULVERIZED, FIRM, UNIFORM SEED BED IS 21 CALENDAR DAYS OF CEASE OF ANY PHASE OF ACTIVITY ASSOCIATED WITH A C) 0
PREPARED 4-6 INCHES DEEP. SWALE.
6. SEED ON A FRESHLY PREPARED SEED BED AND COVER SEED LIGHTLY. 4. SEDIMENT WILL BE REMOVED FROM BEHIND THE SEDIMENT FENCE WHEN Q Q
2 - 3 LBS PER 1000 S.F. (SEE MIXTURE BELOW) IT BECOMES HALF FILLED. THE SEDIMENT FENCE WILL BE REPAIRED AS O O
20' 7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. NECESSARY TO MAINTAIN A BARRIER. STAKES MUST BE STEEL. STAKE Z m V
6" MIN. GRAIN STRAW & HAY AT 75 TO 100 LBS PER 1000 S.F. SPACING WILL BE 6 FEET MAX. WITH THE USE OF EXTRA STRENGTH FABRIC,
WOOD CHIPS AT 500 LBS. PER 1000 S.F. WITHOUT WIRE BACKING. STAKE SPACING WILL BE 8 FEET MAX. WHEN w N
2" - 3" `L JUTE & MESH AS PER MANUFACTURER STANDARD STRENGTH FABRIC AND WIRE BACKING ARE USED. IF ROCK FILTERS Q O W
COARSE AGGREGATE �� 8. ASPHALT FOR ANCHORING MULCH SHALL BE TYPE SS-1 EMULSION AND ARE DESIGNED AT LOW POINTS IN THE SEDIMENT FENCE, THE ROCK WILL BE p N
APPLIED AT A RATE OF 1000 GAL. PER ACRE FOR SLOPE STABILIZATION, REPAIRED OR REPLACED IF IT BECOMES HALF-FULL OF SEDIMENT, NO LONGER Q Z O
COMPACTED SOIL AND 150 GAL. PER TON OF STRAW FOR ANCHORING STRAW. DRAINS AS DESIGNED OR IS DAMAGED. CC
ROADWAY 9. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEED 5. ALL SEEDED AREAS WILL BE FERTILIZED, RESEEDED AS NECESSARY, AND p G Z Z
WITHIN THE PLANTING SEASON, IF POSSIBLE. IF GRASS STAND SHOULD BE MULCHED, ACCORDING TO SPECIFICATIONS IN THE VEGETATIVE PLAN, TO m ClOVER 60% DAMAGED, REESTABLISH FOLLOWING ORIGINAL LIME, FERTILIZER MAINTAIN A VIGOROUS, DENSE VEGETATIVE COVER. ALL SLOPES WILL BE
_ _ _ - - - - AND SEEDING RATES. STABILIZED WITHIN 21 CALENDAR DAYS. ALL OTHER AREAS WILL BE STABILIZED � Z
- - - - - - - - - - -
10. CONSULT CONSERVATION INSPECTOR ON MAINTENANCE, TREATMENT, AND WITHIN 15 WORKING DAYS. : WATER QUALITY REQUIRES ALL SEEDED AREAS Q C Z
FERTILIZATION AFTER PERMANENT COVER IS ESTABLISHED. WILL BE FERTILIZED, RESEEDED AS NECESSARY AND MULCHED ACCORDING TO
11. SEED FOR TEMPORARY AND PERMANENT APPLICATIONS SHALL BE: SPECIFICATIONS IN THE VEGETATIVE PLAN TO MAINTAIN A VIGOROUS, DENSE Z O
20% CARPET GRASS VEGETATIVE COVER. ALL PERIMETER DIKES SWALES, HORIZONTAL TO 'DITCHES,
GRAVEL CONSTRUCTION ENTRANCE 247 BERMUDA GRASS PERIMETER SLOPES, ALL SLOPES STEEPER THAN 3 VERTICAL (3:1) AND ALL ♦ �
20% TURF FESCUE 10% CREEPING RED FESCUE V Q V
CONSTRUCTION SPECIFICATION: 247. ANNUAL RYE GRAIN HIGH QUALITY WATER (HQW) ZONES SHALL BE ' 1 PROVIDED TEMPORARY OR
1. CLEAR THE ENTRANCE AND EXIT AREA OF ALL VEGETATION, ROOTS, AND OTHER OBJECTIONABLE *BERMUDA SEED SHALL BE HULLED FOR WARM WEATHER PERMANENT STABILIZATION WITH GROUND COVER AS SOON AS PRACTICABLE BUT Q Q
MATERIAL AND PROPERLY GRADE IT. PLANTING. PURITY OF SEED SHALL BE A MIN. OF 98% AND IN ANY EVENT WITHIN SEVEN (7) CALENDAR DAYS FROM THE LAST V
GERMINATION SHALL BE A MIN. OF 85%. LAND-DISTURBING ACTIVITY. ALL OTHER DISTURBED AREAS SHALL BE PROVIDED
2. PLACE THE GRAVEL TO THE SPECIFIC GRADE AND DIMENSIONS SHOWN ON THE PLANS, AND SMOOTH TEMPORARY OR PERMANENT STABILIZATION WITH GROUND COVER AS SOON AS J
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IT. ALL DISTURBED AREA SHALL BE SEEDED WITHIN 7 TO 14 DAYS OF THE COMPLETION PRACTICABLE BUT IN ANY EVENT WITHIN FOURTEEN (14) CALENDAR DAYS FROM Q
3. PROVIDE DRAINAGE TO CARRY WATER TO A SEDIMENT TRAP OR OTHER SUITABLE OUTLET. OF GRADING. CONSULT CONSERVATION ENGINEER OR SOIL CONSERVATION SERVICE THE LAST LAND-DISTURBING ACTIVITY. Q N
4. USE GEOTEXTILE FABRICS BECAUSE THEY IMPROVE STABILITY OF THE FOUNDATION IN LOCATIONS FOR ADDITIONAL INFORMATION CONCERNING OTHER ALTERNATIVES FOR VEGETATION OF 6. SEDIMENT SHALL BE CLEANED OUT AS NECESSARY WHEN SEDIMENT POND Q Luz
SUBJECT TO SEEPAGE OR HIGH WATER TABLE. DENUDED AREAS. THE ABOVE VEGETATION RATES ARE THOSE WHICH DO WELL WHEN IT BECOMES LESS THAN 3 FT IN DEPTH.
UNDER LOCAL CONDITIONS, OTHER SEEDING SCHEDULES MAY BE POSSIBLE. 7. SIDE SLOPES OF SEDIMENT POND SHALL BE MAINTAINED AT NO GREATER ~ Z T"
MAINTENANCE: THAN 3 TO 1 SLOPE. W LU N
MAINTAIN THE GRAVEL PAD IS A CONDITION TO PREVENT MUD OR SEDIMENT FROM LEAVING THE NPDES STABILIZATION TIMEFRAMES 8. STOCKPILE AREA SHALL BE SURROUNDED WITH TEMPORARY SILT FENCE AS o m m
CONSTRUCTION SITE. THIS MAY REQUIRE PERIODIC TOP DRESSING WITH 2 INCH STONE. AFTER EACH SITE AREA DESCRIPTION STABILIZATION TIMEFRAME EXCEPTIONS NECESSARY TO PROTECT SITE AND SURROUNDINGS FROM EROSION.
RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP SEDIMENT AND CLEAN IT OUT AS NECESSARY. 9. STOCKPILE AND SEDIMENT POND AREAS SHALL BE SEEDED AS NECESSARY
IMMEDIATELY REMOVE ALL OBJECTIONABLE MATERIALS SPILLED, WASHED, OR TRACKED ONTO PUBLIC PERIMETER DIKES, SWALES, DITCHES AND SLOPES 7 DAYS NONE TO PROTECT SITE AND SURROUNDING FROM EROSION. -)
ROADWAYS.
HIGH QUALITY WATER (HQW) ZONES 7 DAYS NONE C
SLOPES STEEPER THAN 3:1 7 DAYS IF SLOPES ARE 10' OR LESS IN LENGTH AND ARE NOT 00
STEEPER THAN 2:1 14 DAYS ARE ALLOWED t00
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TEMPORARY GRAVELLED CONSTRUCTION ENTRANCE HAUL ROAD SECTION SLOPES 3:1 OR FLATTER 14 DAYS 7 DAYS FOR SLOPES GREATER THAN 50' IN LENGTH U N
NTS 4 NTS ALL OTHER AREAS WITH SLOPES FLATTER THAN 4:1 14 DAYS NONE, EXCEPT FOR PERIMETERS AND HQW ZONES •11 P, Z
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TEMPORARY SEEDING RECOMMENDATIONS FOR LATE Ed
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6'W1 E.S. FABRIC W Q T;
8' W/ WIRE MESH a� O 4-J a)
WINTER AND EARLY SPRING s:q �
STEEL POST SEEDING MIXTURE W �-
WIRE MESH FOR STANDARD FABRIC SPECIES RATE (lb/acre) x W cn r,� ON
MIN. 14 GA. o x z_ v STANDARD OR EXTRA STRENGTH RYE (GRAIN) 120
6x6 MESH FOR 1 m w FILTER FABRIC
STANDARD FABRIC `�- J a ANNUAL LESPEDEZA 50
00
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DIRECTION OF WATER FLOW COASTAL PLAIN, KOREAN
IN MOUNTAINS)
ANCHOR FABRIC SKIRT OMIT ANNUAL LESPEDEZA WHEN DURATION OF TEMPORARY COVER IS
�I z MIN. 8" DEEP & 4" WIDE.
N- NOT TO EXTEND BEYOND JUNE.
SEEDING DATES
MOUNTAINS - ABOVE 2,500 FEET: FEB. 15 - MAY 15
NOTES: BELOW 2,500 FEET: FEB. 1 - MAY 1
1. SYN. FENCE FABRIC SHALL BE MIN. OF 30" IN WIDTH EXISTING GROUND SURFACE PIEDMONT - JAN. 1 - MAY 1
WITH 30 LB/IN TENSILE STRENGTH FOR STANDARD FABRIC COASTAL PLAIN - DEC. 1 - APRIL 15
AND 50 LB/IN FOR EXTRA STRENGTH. 1 SOIL AMENDMENTS o 0
2. FABRIC SHALL BE CONTINUOUS LENGTH. IF JOINTS ARE cv o
NECESSARY, LAP FABRIC POST TO POST. 3 FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 lb/acre g ,i;
3. STEEL POST SHALL BE MIN 4' IN HEIGHT AND BE OF THE GROUND AGRICULTURAL LIMESTONE AND 750 lb/acre 10-10-10 A N �
SELF-FASTENER STEEL ANGLE TYPE. FERTILIZER. z N
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TEMPORARY SILT FENCE MULCH U
NTS APPLY 4,000 lb/acre STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, W
NETTING, OR A MULCH ANCHORING TOOL. A DISK WITH BLADES SET a ZO
TEMPORARY SILT FENCE MAINTENANCE NEARLY STRAIGHT CAN BE USED AS A MULCH ANCHORING TOOL. x
INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND EACH RAINFALL.
MAKE ANY REQUIRED REPAIRS IMMEDIATELY. MAINTENANCE ] a
REFERTILIZE IF GROWTH IS NOT FULLY ADEQUATE. RESEED, REFERTILIZE x
SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE AND MULCH IMMEDIATELY FOLLOWING EROSION OR OTHER DAMAGE. z
OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY. ►--�
REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE (� cl
STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON TEMPORARY SEEDING RECOMMENDATIONS FOR SUMMER z
THE FENCE. TAKE CARE TO AVOID UNDERMINING THE FENCE DURING SEEDING MIXTURE W
CLEANOUT.
REMOVE ALL FENCING MATERIALS AND UNSTABLE IT AFTER THE SPECIES RATE (lb/acre) (�
CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED. GERMAN MILLET 40
H
IN THE PIEDMONT AND MOUNTAINS, A SMALL-STEMMED SUDANGRASS MAY
BE SUBSTITUTED AT A RATE OF 50 lb/acre. °O
2 TEMPORARY SILT FENCE NTS 5 TYPICAL SEDIMENT POND CROSS SECTION NTS W
SEEDING DATES z z I
MOUNTAINS - MAY 15 - AUG. 15 Z
PIEDMONT - MAY 1 - AUG. 15
COASTAL PLAIN - APR. 15 - AUG. 15 O H
SOIL AMENDMENTS
FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 lb/acre Z W
GROUND AGRICULTURAL LIMESTONE AND 750 lb/acre 10-10-10 a IS
FERTILIZER. a
MULCH z
APPLY 4,000 lb/acre STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT,
NETTING, OR A MULCH ANCHORING TOOL. A DISK WITH BLADES SET
NEARLY STRAIGHT CAN BE USED AS A MULCH ANCHORING TOOL.
166' MAINTENANCE
REFERTILIZE IF GROWTH IS NOT FULLY ADEQUATE. RESEED, REFERTILIZE
AND MULCH IMMEDIATELY FOLLOWING EROSION OR OTHER DAMAGE.
EXISTING GROUND SURFACE
Licence#C-3641
1 L- Lo � 1 ��� 18087
3 3
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CKD. JPN
DRWN. NSB
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DATE 03/29/21
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3 TYPICAL BORROW PIT CROSS SECTION NTS 6 SEDIMENT POND NTS