SW6230804_Plansheet - Misc. Detail_20240621 (3)

CONSTRUCTION SPECIFICATIONS MIXTURE
CONSTRUCTION SPECIFICATIONS AGRICULTURAL LIMESTONE..........................2 TONS/ACRE(3 TONS/ACRE IN CLAY SOILS) SEEDBED PREPARATION:
1. REMOVE AND PROPERLY DISPOSE OF ALL TREES, BRUSH, STUMPS, AND OTHER FERTILIZER................................................1,000 LBS/ACRE-10-10-10 1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL THREE INCHES DEEP
1, UNIFORMLY GRADE A SHALLOW DEPRESSION APPROACHING THE INLET. OBJECTIONABLE MATERIAL. SUPERPHOSPHATE....................................500 LBS/ACRE-20%ANALYSIS OVER ADVERSE SOIL CONDITIONS,IF AVAILABLE.
2. ENSURE THAT THE MINIMUM CONSTRUCTED CROSS SECTION MEETS ALL DESIGN MULCH....................................................2 TONS/ACRE-SMALL GRAIN STRAW w N
2. RIP THE ENTIRE AREA TO SIX INCHES DEEP. z
2. DRIVE 5-FOOT STEEL POSTS 2 FEET INTO THE GROUND SURROUNDING THE INLET. SPACE POSTS REQUIREMENTS. ANCHOR..................................................ASPHALT EMULSION AT 300 GALS/ACRE w
EVENLY AROUND THE PERIMETER OF THE INLET, A MAXIMUM OF 4 FEET APART. 3. ENSURE THAT THE TOP OF THE DIKE IS NOT LOWER AT ANY POINT THAN THE DESIGN N
3. REMOVE ALL LOOSE ROCK,ROOTS AND OTHER OBSTRUCTIONS,LEAVING
ELEVATION PLUS THE SPECIFIED SETTLEMENT. SEEDING SCHEDULE z z ui I.-_
SURFACE REASONABLY SMOOTH AND UNIFORM. o - z o
3. SURROUND THE POSTS WITH WIRE MESH HARDWARE CLOTH. SECURE THE WIRE MESH TO THE 4. PROVIDE SUFFICIENT ROOM AROUND DIVERSIONS TO PERMIT MACHINE REGRADING AND FOR SHOULDERS,SIDE DITCHES,SLOPES(MAX 3:1): cn S o U) Q w
STEEL POSTS AT THE TOP, MIDDLE, AND BOTTOM. PLACING A 2-FOOT FLAP OF THE WIRE MESH CLEANOUT. DATE TYPE PLANTING RATE z w a.o > 5: O =
4. APPLY AGRICULTURAL LIME,FERTILIZER AND SUPERPHOSPHATE O o Of THE GRAVEL FOR ANCHORING IS RECOMMENDED. 5. VEGETATE THE RIDGE AND CHANNEL IMMEDIATELY AFTER CONSTRUCTION, UNLESS IT AUG15-NOV1 TALL FESCUE 300LBS/ACRE 5; z w
UNIFORMLY AND MIX WITH SOIL(SEE MIXTURE). uw "' o O
WILL REMAIN IN PLACE LESS THAN 30 WORKING DAYS. NOV 1-MAR 1 TALL FESCUE&ABRUZZI RYE 300LBS/ACRE w o O �
4. PLACE CLEAN GRAVEL (NC DOT #5 OR #57 STONE) ON A 2:1 SLOPE WITH A HEIGHT OF 16 MAR1-APR15 TALL FESCUE 300LBS/ACRE � o of o = O
GENERAL NOTES:
INCHES AROUND THE WIRE, AND SMOOTH TO AN EVEN GRADE. APR 15-JUN30 HULLED COMMON BERMUDAGRASS 25LBS/ACRE 5 CONTINUE TILLAGE UNTILAWELL-PULVERIZED,FIRM,REASONABLY C = o
UNIFORM SEEDBED IS PREPARED FOUR TO SIX INCHES DEEP. o z
1. DIVERSION TO BE USED TO CONVEY SEDIMENT LADEN WATER INTO AN APPROVED JUL 1-AUG 15 TALL FESCUE AND BROWNTOP 125 LBS/ACRE(TALL FESCUE),35 LBS/ACRE
5. ONCE THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED, REMOVE ACCUMULATED EROSION AND SEDIMENT CONTROL BMP. MILLET OR SORGHUM-SUDAN (BROWNTOP MILLET),30 LBS/ACRE 6. SEED ON A FRESHLY PREPARED SEEDBED AND COVER SEED LIGHTLY
SEDIMENT, AND ESTABLISH FINAL GRADING ELEVATIONS. 2. IMMEDIATELY LINE AND STABILIZE BEFORE ANY DOWNSLOPE GRADING BEGINS HYBRIDS* (SORGHUM-SUDAN HYBRIDS) WITH SEEDING EQUIPMENT OR CULTIPACK AFTER SEEDING.
6. COMPACT THE AREA PROPERLY AND STABILIZED IT WITH GROUNDCOVER. (STABILIZATION MUST OCCUR BEFORE ISSUANCE OF A CERTIFICATE OF COMPLIANCE). FOR SHOULDERS,SIDE DITCHES,SLOPES(3:1TO2:1):
STABILIZATION METHOD IS BASED ON VELOCITY OF DRAINAGE. 7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. v
MAINTENANCE: 3. DIVERSIONS SHOULD ONLY BE USED FOR DRAINAGE AREAS 5 ACRES OR LESS. DATE TYPE PLANTING RATE
N N V N N N
4. MINIMUM LONGITUDINAL SLOPE OF DIVERSION SHALL BE 0.3%. MAR1-JUN1 SERICEA LESPEDEZA(SCARIFIED) 50 LBS/ACRE(SERICEA LESPEDEZA), 8. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR o N o N
INSPECT INLETS DAILY AND AFTER EACH SIGNIFICANT (1/ INCH OR GREATER) RAINFALL EVENT. CLEAR 5. DEPTHS SHOWN SHALL BE FINAL AFTER SETTLEMENT. CONTRACTOR SHALL BE AND USE THE FOLLOWING RESEEDINGS WITHIN THE PLANTING SEASON,IF POSSIBLE. IF STAND ti
THE MESH WIRE OF ANY DEBRIS OR OTHER OBJECTS TO PROVIDE ADEQUATE FLOW FOR SUBSEQUENT RESPONSIBLE FOR ADJUSTING DITCHES IN FIELD TO MEET DESIGN CRITERIA IF COMBINATIONS:
SHOULD BE MORE THAN 60%DAMAGED,RE-ESTABLISH FOLLOWING THE o o O
SETTLEMENT OCCURS. ORIGINAL LIME,FERTILIZER AND SEEDING RATES. ui z
RAINS. TAKE CARE NOT TO DAMAGE OR UNDERCUT THE WIRE MESH DURING SEDIMENT REMOVAL, MAR1-APR15 ADD TALL FESCUE 120LBS/ACRE � J
REPLACE STONE AS NEEDED. 6. REFER TO SKIMMER BASIN DETAIL FOR DIVERSION DITCH/SKIMMER BASIN ENTRANCE. MAR 1-JUN30 OR ADD WEEPING LOVE GRASS 10LBS/ACRE 9. CONSULTS&EC ENVIRONMENTAL ENGINEERS ON MAINTENANCE LL
STANDARD METAL POSTS 2' IN GROUND MAINTENANCE: MAR 1-JUN 30 OR ADD HULLED COMMON 25 LBS/ACRE TREATMENT AND FERTILIZATION AFTER PERMANENT COVER IS
BERMUDAGRASS ESTABLISHED.
INSPECT TEMPORARY DIVERSIONS DAILY AND REPAIR, AS NECESSARY AND JUN1-SEPT 1 TALL FESCUE AND BROWNTOP 120 LBS/ACRE(TALL FESCUE),
FOLLOWING EVERY RAINFALL EVENT OF GREATER THAN 1/2" WITHIN A 24HR MULLET OR SORGHUM-SUDAN 35LBS/ACRE(BROWNTOP MULLET)
;
PERIOD. IMMEDIATELY REMOVE SEDIMENT FROM THE FLOW AREA AND REPAIR THE HYBRIDS* 30 LBS/ACRE(SORGHUM-SUDAN
GALVANIZED HARDWARE DIVERSION RIDGE. CAREFULLY CHECK OUTLETS AND MAKE TIMELY REPAIRS AS Ln z_ HYBRIDS)
WIRE EXTENDS TO TOP OF BOX NEEDED. WHEN THE AREA PROTECTED IS PERMANENTLY STABILIZED, REMOVE THE o SEPT 1-MAR 1 SERICEALESPEDEZA(UNHULLED- 70 LBS/ACRE(SERICEA LESPEDEZA),
RIDGE AND THE CHANNEL TO BLEND WITH THE NATURAL GROUND LEVEL AND 2' MIN. o o UNSCARIFIED)AND TALL FESCUE 120 LBS/ACRE(TALL FESCUE)
APPROPRIATELY STABILIZE IT. NOV 1-MAR 1 AND ABRUZZI RYE 25 LBS/ACRE
DIKE 217 CONSULT S&EC ENVIRONMENTAL ENGINEERS FORADDITIONAL INFORMATION CONCERNING OTHER ALTERNATIVES FOR
.0 MIN. 0.25 FT �P�' �y� VEGETATION OF DENUDED AREAS.THE ABOVE VEGETATION RATES ARE THOSE THAT DO WELL UNDER LOCAL
° c00 0 0 FL OW FREEBOARD CONDITIONS;OTHER SEEDING RATE COMBINATIONS ARE POSSIBLE.
�q ® '2 10-YR MAX FLOW �P� " TEMPORARY.RESEED ACCORDING TO OPTIMUM SEASON FOR DESIRED PERMANENT VEGETATION.DO NOT ALLOW
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\ �� �� \�•\��\��\��\\/� \. TEMPORARY COVER TO GROW MORE THAN 12"IN HEIGHT BEFORE MOWING;OTHERWISE,FESCUE MAY BE SHADED OUT.
� ��'o�b� /�\! / i �\ SEEDING SCHEDULE
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DETAIL REFERENCE 6.20 NC ESCPDM a
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#57 WASHED STONE PLACED TO A J L�
HEIGHT OF 12"-18" MIN.ABOVE TOP OF BOX. Q
DETAIL REFERENCE 6.51 NC ESCPDM
1 RIP RAP APRON Co Ili
INLET PROTECTION Q
EC-04 SCALE: NTS z
A A A A
3 TIMES INNER I D. DIA.+0.4 La,
PIPE DIAMETER, W2 � PIPE W1if � O
RIP RAP Q
PLAN VIEW APRON 0
CONSTRUCTION SPECIFICATIONS PLAN VIEW LLB
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1. PLACE STONE TO THE LINES AND DIMENSIONS SHOWN IN THE PLAN ON A FILTER FABRIC FOUNDATION. O
2. KEEP THE CENTER STONE SECTION AT LEAST 9 INCHES BELOW NATURAL GROUND LEVEL WHERE THE DAM ABUTS THE La
CHANNEL BANKS. Q
3. EXTEND STONE AT LEAST 1.5 FEET BEYOND THE DITCH BANK TO KEEP WATER FROM CUTTING AROUND THE ENDS OF THE o La
CHECK DAM.
PIPE PIPE
4. SET SPACING BETWEEN DAMS TO ASSURE THAT THE ELEVATION AT THE TOP OF THE LOWER DAM IS THE SAME AS THE
TOE ELEVATION OF THE UPPER DAM.
5. PROTECT THE CHANNEL AFTER THE LOWEST CHECK DAM FROM HEAVY FLOW THAT COULD CAUSE EROSION. „III-III-III-III=III-III-III=III=1'' 11=III=III=III="'- 1-III=III=III=III=III=III-III-III=1 11=III=III=III="'-
> -III-III-III- �- O III-III-III-
1II-1II_, III-III-III-III-III-I d II=1II=�' -1II-1II=1II=1II=1II=1Ili 111-I d 6. MAKE SURE THAT THE CHANNEL REACH ABOVE THE MOST UPSTREAM DAM IS STABLE. III;III;IIIiTI;III ""'-III=III=III II
7. ENSURE THAT OTHER AREAS OF THE CHANNEL, SUCH AS CULVERT ENTRANCES BELOW THE CHECK DAMS, ARE NOT
SUBJECT TO DAMAGE OR BLOCKAGE FROM DISPLACED STONES. -1 1 111 1T=i- I -Hill III-Ill,
O SECTION 'A-A' FABRIC SECTION FILTER
FABRIC
MAINTANENCE:
INSPECT CHECK DAMS AND CHANNELS DAILY AND REPAIR, AS NECESSARY FOLLOWING EVERY RAINFALL EVENT OF GREATER
THAN 1/2" WITHIN A 24HR PERIOD. CLEAN OUT SEDIMENT, STRAW, LIMBS, OR OTHER DEBRIS THAT COULD CLOG THE CHANNEL PIPE OUTLET TO FLAT AREA NO WELL DEFINED
WHEN NEEDED. PIPE OUTLET TO WELL DEFINED CHANNEL
CHANNEL DETAIL REFERENCE 6.41 NC ESCPDM
ANTICIPATE SUBMERGENCE AND DEPOSITION ABOVE THE CHECK DAM AND EROSION FROM HIGH FLOWS AROUND THE EDGES OF
THE DAM. CORRECT ALL DAMAGE IMMEDIATELY. IF SIGNIFICANT EROSION OCCURS BETWEEN DAMS, ADDITIONAL MEASURES CAN
BE TAKEN SUCH AS, INSTALLING A PROTECTIVE RIPRAP LINER IN THAT PORTION OF THE CHANNEL (PRACTICE 6.31, CONSTRUCTION SPECIFICATIONS
RIPRAP-LINE AND PAVED CHANNELS).
1. ENSURE THAT THE SUBGRADE FOR THE FILTER AND RIPRAP FOLLOWS THE REQUIRED LINES AND GRADES SHOWN IN THE PLAN. COMPACT ANY FILL REQUIRED
REMOVE SEDIMENT ACCUMULATED BEHIND THE DAMS AS NEEDED TO PREVENT DAMAGE TO CHANNEL VEGETATION, ALLOW THE IN THE SUBGRADE TO THE DENSITY OF THE SURROUNDING UNDISTURBED MATERIAL. LOW AREAS IN THE SUBGRADE ON UNDISTURBED SOIL MAY ALSO BE
CHANNEL TO DRAIN THROUGH THE STONE CHECK DAM, AND PREVENT LARGE FLOWS FROM CARRYING SEDIMENT OVER THE DAM. FILLED BY INCREASING THE RIPRAP THICKNESS.
ADD STONES TO DAMS AS NEEDED TO MAINTAIN DESIGN HEIGHT AND CROSS SECTION.
2. THE RIPRAP AND GRAVEL FILTER MUST CONFORM TO THE SPECIFIED GRADING LIMITS SHOWN ON THE PLANS. co
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3, FILTER CLOTH, WHEN USED, MUST MEET DESIGN REQUIREMENTS AND BE PROPERLY PROTECTED FROM PUNCHING OR TEARING DURING INSTALLATION. REPAIR N
ANY DAMAGE BY REMOVING THE RIPRAP AND PLACING ANOTHER PIECE OF FILTER CLOTH OVER THE DAMAGED AREA. ALL CONNECTING JOINTS SHOULD Q z
a 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.
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o EXISTING SLOPES 4. RIPRAP MAY BE PLACED BY EQUIPMENT, BUT TAKE CARE TO AVOID DAMAGING THE FILTER.
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VARIES 5. THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE 1.5 TIMES THE MAXIMUM STONE DIAMETER.
NOTE: REMOVE SEDIMENT 6. RIPRAP MAY BE FIELD STONE OR ROUGH QUARRY STONE. IT SHOULD BE HARD, ANGULAR, HIGHLY WEATHER-RESISTANT AND WELL GRADED.
Cl) Co
0 - ACCUMULATION FROM BEHIND CHECK
DAMS TO PREVENT DAMAGE TO 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 CO 0
=III= 0.50' MIN RECEIVING AREA OR SLIGHTLY BELOW IT. N N
w ICI-ICI=11 = CHANNEL VEGETATION. FLOW SHOULD Lo Ln
J =III BE MAINTAINED THROUGH THE DAM.
_ _ 8. ENSURE THAT THE APRON IS PROPERLY ALIGNED WITH THE RECEIVING STREAM AND PREFERABLY STRAIGHT THROUGHOUT ITS LENGTH. IF A CURVE IS NEEDED
w w KEYED RIP RAP TO FIT SITE CONDITIONS, PLACE IT IN THE UPPER SECTION OF THE APRON. J_
Q
Q 9. IMMEDIATELY AFTER CONSTRUCTION, STABILIZE ALL DISTURBED AREAS WITH VEGETATION
-111 III III- =1111111 5 WASHED STONE MAINTENANCE: ��RS o bN'o 0
co 1-III-III- 1-
FRONT VIEW -lll 1.5' a
FILTER FABRIC 1.0' INSPECT RIP-RAP OUTLET STRUCTURES DAILY AND AFTER SIGNIFICANT (1/2 INCH OR GREATER) RAINFALL EVENTS TO SEE IF ANY EROSION AROUND OR w o
BELOW THE RIPRAP HAS TAKEN PLACE, OR IF STONES HAVE BEEN DISLODGED. IMMEDIATELY MAKE ALL NEEDED REPAIRS TO PREVENT FURTHER DAMAGE.
dd �� J
w N�
o �"I'�` TOP ELEVATION OF STORMWATER 0.5 -1
#5 WASHED 2 MAX. < NOTES: z
STONE 1
m 1) L = THE LENGTH OF THE RIPRAP APRON.
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2) d = 1.5 TIMES THE MAXIMUM STONE DIAMETER BUT NOT LESS THAN 6" (inches).
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EXISTING =1 i�ILTER FABIC Ii1 -III
J OROAD 3) IN A WELL-DEFINED CHANNEL EXTEND THE APRON UP THE CHANNEL BANKS TO AN ELEVATION OF 6" (inches) ABOVE THE MAXIMUM TAILWATER DEPTH
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STEP SEQUENCE CLASS B R4P 6RFEET OR TO THE TOP OF THE BANK, WHICHEVER IS LESS.
SIDE VIEW 4) A FILTER BLANKET OR FILTER FABRIC SHOULD BE INSTALLED BETWEEN THE RIPRAP AND SOIL FOUNDATION.
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DETAIL REFERENCE 6.83 NC ESCPDM
SEAL i,>%Ill11111 ,
CARO
o MAINTENANCE: 1`t4';: ."
4 CHECK DAM INSPECT WATTLES DAILY AND AFTER SIGNIFICANT (1/2 INCH OR GREATER) RAINFALL EVENTS TO SEE IF ANY SEDIMENT HAS ACCUMULATED OR ANY =�� 4° '�. w
0 SCALE: NTS DWATTLES AMAGE. HAVE BEEN DISPLACED. IMMEDIATELY REMOVE SEDIMENT FROM THE FLOW AREA AND MAKE ALL NEEDED REPAIRS TO PREVENT FURTHER 8 RIP-RAP OUTLET PROTECTION -� SEAL c �_ z
EC-04 048 84 .
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