21-Detail Sheets-501-ESC Details

LaBeLLa
Powered by partnership.
Cz
a�
0
CD
0
� a
iv M
Q U
Y
aD
� p
C-3 Q
00 m
d Q
o E
C7 to
CV CD
� o
o =
N
W LO
CO
L) Ch
E N
H
(D L
CC i�
� d
Q�B�\GPOPo
2
o o ° 700,
8" MIN
0
2"4' COARSE
AGGREGATE
(SURGE STONE) AS 12' MIN
CONSTRUCTION SPECIFICATIONS:
1. CLEAR THE ENTRANCE AND EXIT AREA OF ALL VEGETATION, ROOTS, AND OTHER OBJECTIONABLE
MATERIAL AND PROPERLY GRADE IT.
2. PLACE THE GRAVEL TO THE SPECIFIC GRADE AND DIMENSIONS SHOWN ON THE PLANS AND
SMOOTH IT.
3. PROVIDE DRAINAGE TO CARRY WATER TO A SEDIMENT TRAP OR OTHER SUITABLE OUTLET.
4. USE NONWOVEN GEOTEXTILE FABRICS BECAUSE THEY IMPROVE STABILITY OF THE FOUNDATION IN LOCATIONS
SUBJECT TO SEEPAGE OR HIGH WATER TABLE.
MAINTENANCE
MAINTAIN THE GRAVEL PAD IN A CONDITION TO PREVENT MUD OR SEDIMENT FROM LEAVING THE
CONSTRUCTION SITE. THIS MAY REQUIRE PERIODIC TOP DRESSING WITH 2-INCH STONE. AFTER EACH
RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP SEDIMENT AND CLEAN IT OUT AS NECESSARY.
IMMEDIATELY REMOVE ALL OBJECTIONABLE MATERIAL SPILLED, WASHED OR TRACKED ONTO PUBLIC
ROADWAYS.
TEMPORARY CONSTRUCTION ENTRANCE
SEEDING
SOIL AND VEGETATION
PER NC WILDLIFE REQUEST, OVER SEED DISTURBED AREA WITH A MIXTURE OF RED CLOVER,
CREEPING RED FESCUE, AND A GRAIN SUCH AS RYE, OAT OR WHEAT. THE SEEDING MIXTURE,
SEEDING RATE, AND SOIL PREPARATION IS TO BE DETERMINED BY AN ENVIRONMENTAL
PROFESSIONAL AND SUBMITTED PRIOR TO APPLICATION.
PERMANENT SEEDING SCHEDULE
DEWATERING
CONCRETE
BLOCK
1.
A 00 °o A 012
�00
c d� o
°O °o°�
p
99, .0
w°.o o°�oo •°000.8 :o °�b:od �S •O°°podo o� °°o°
oCJ Oo w 4 0 oO0 00 0° ° o °• °O0
o�$"off°O's
0 0 o 0o p°ooi�°O ° o 0 00 0 �`o.o
om
0 0 00 ° :,0
o Ao
o°o ° o:o • ° o 000:
PLAN
pro b ^dam°:o: °o°°°•°� o"o "om a000""o
La
APRON LENGTH NONWOVEN EXTRA STRENGTH PER US 2:1SLOPE,
FABRICS (US 205 NW), NCDOT TYPE 2, GRAVEL FILTER
F7�1 �18„ OR APPROVED EQUIVALENT TEMPORARY WASHED WIRE SCREEN
OVERLAP SEDIMENT STONE
POOL WIRE SCREEN
JOIN STRIPS BY ANCHORING ANCHOR METTING IN �� �� -III-I of -
AND OVERLAPPING 1' MIN. °
A B INCH TRENCH.tl - - - - 0 16"
APRON
THICKNESS 4
INSTALLATION OF NETTING AND MATTING: SECTION A -A
PRODUCTS DESIGNED TO CONTROL EROSION SHOULD BE INSTALLED
IN ACCORDANCE WITH MANUFACTURER'S INSTRUCTIONS. ANY MAT CONSTRUCTION SPECIFICATIONS: SEDIMENT DROP INLET
OF BLANKET -TYPE PRODUCT USED AS A PROTECTIVE MULCH SHOULD 1. ENSURE THAT THE SUBGRADE FOR THE FILTER AND RIPRAP FOLLOWS THE REQUIRED LINES AND GRADES WITH GRATE
PROVIDE COVER OF AT LEAST 30% OF THE SURFACE WHERE IT IS APPLIED. SHOWN IN THE PLAN. COMPACT ANY FILL REQUIRED IN THE SUBGRADE TO THE DENSITY OF THE SECTION
SURROUNDING UNDISTURBED MATERIAL. LOW AREAS IN THE SUBGRADE ON UNDISTURBED SOIL MAY
ALSO BE FILLED BY INCREASING THE RIPRAP THICKNESS. CONSTRUCTION SPECIFICATIONS:
1. APPLY LIME, FERTILIZER AND SEED BEFORE LAYING THE NET OR MAT. 2. THE RIPRAP AND GRAVEL FILTER MUST CONFORM TO THE SPECIFIED GRADING LIMITS SHOWN ON THE 1. LAY ONE BLOCK ON EACH SIDE OF THE STRUCTURE ON ITS SIDE IN THE BOTTOM ROW TO ALLOW POOL
IF OPEN -WEAVE NETTING IS USED, LIME MAY BE INCORPORATED BEFORE PLANS. DRAINAGE. THE FOUNDATION SHOULD BE EXCAVATED AT LEAST 2-INCHES BELOW THE CREST OF THE
INSTALLING THE NET AND FERTILIZER AND SEED SPRAYED ON AFTERWARD. 3. FILTER CLOTH, WHEN USED, MUST MEET DESIGN REQUIREMENTS AND BE PROPERLY PROTECTED FROM STORM DRAIN. PLACE THE BOTTOM ROW OF BLOCKS AGAINST THE EDGE OF THE STORM DRAIN FOR
2. START LAYING THE NET FROM THE TOP OF THE CHANNEL OR SLOPE AND PUNCHING OR TEARING DURING INSTALLATION. REPAIR ANY DAMAGE REMOVING THE RIPRAP LATERAL SUPPORT AND TO AVOID WASHOUTS WHEN OVERFLOW OCCURS. IF NEEDED, GIVE LATERAL
UNROLL IT DOWN THE GRADE. ALLOW NETTING TO LAY LOOSELY ON THE AND PLACING ANOTHER PIECE FILTER CLOTH OVER THE DAMAGED AREA. ALL CONNECTING SUPPORT TO SUBSEQUENT ROWS BY PLACING 2" x 4" WOOD STUDSTHROUGH BLOCK OPENINGS.
SOIL BUT WITHOUT WRINKLES -DO NOT STRETCH. JOINTS SHOULD OVERLAP A MINIMUM OF 1 FT. IF THE DAMAGE IS EXTENSIVE, REPLACE THE ENTIRE
FILTER CLOTH. 2. CAREFULLY FIT HARDWARE CLOTH OR COMPARABLE WIRE MESH WITH /2-INCH OPENINGS OVER ALL
3. TO SECURE THE NET, BURY THE UPSLOPE END IN A SLOT OR TRENCH NO LESS 4. RIPRAP MAY BE PLACED BY EQUIPMENT, BUT TAKE CARE TO AVOID DAMAGING THE FILTER. BLOCK OPENINGS TO HOLD GRAVEL IN PLACE.
THAN 6-INCHES DEEP, COVER WITH SOIL, AND TAMP FIRMLY AS SHOWN IN 5. THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE 1.5 TIMES THE MAXIMUM STONE DIAMETER. 3 1
THIS DETAIL. STAPLE THE NET EVERY 12-INCHES ACROSS THE TOP END AND 6. RIPRAP MAY BE FIELD STONE OR ROUGH QUARRY STONE. IT SHOULD BE HARD, ANGULAR, HIGHLY 3. USE CLEAN GRAVEL, K TO Y2-INCH IN DIAMETER, PLACED 2 INCHES BELOW THE TOP OF THE BLOCK
AN EVERY 3-FEET AROUND THE EDGES AND BOTTOM. WHERE 2 STRIPS OF WEATHER -RESISTANT AND WELL GRADED. ON A 2:1 SLOPE OR FLATTER AND SMOOTH IT TO AN EVEN GRADE. DOT #57 WASHED STONE IS
NET ARE LAID SIDE BY SIDE, THE ADJACENT EDGES SHOULD BE OVERLAPPED 7. CONSTRUCT THE APRON ON ZERO GRADE WITH NO OVERFALL AT THE END. MAKE THE TOP OF THE RECOMMENDED.
3-INCHES STAPLED TOGETHER. EACH STRIP OF NETTING SHOULD ALSO BE RIPRAP AT THE DOWNSTREAM END LEVEL WITH THE RECEIVING AREA OR SLIGHTLY BELOW IT. MAINTENANCE:
STAPLED DOWN THE CENTER, EVERY 3 FT. DO NOT STRETCH THE NET WHEN 8. ENSURE THAT THE APRON IS PROPERLY ALIGNED WITH THE RECEIVING STREAM AND PREFERABLE
APPLYING STAPLES. 1. INSPECT THE BARRIER AFTER EACH RAIN AND MAKE REPAIRS AS NEEDED.
STRAIGHT THROUGHOUT ITS LENGTH. IF A CURVE IS NEEDED TO FIT SITE CONDITIONS, PLACE IT IN THE 2. REMOVE SEDIMENT AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR SUBSEQUENT
MAINTENANCE: UPPER SECTION OF THE APRON. RAINS.
9. IMMEDIATELY AFTER CONSTRUCTION, STABILIZE ALL DISTURBED AREAS WITH VEGETATION.
INSPECT ALL MULCHES PERIODICALLY, AND AFTER RAINSTORMS TO CHECK 3. WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN ADEQUATELY STABILIZED, REMOVE ALL
FOR RILL EROSION, DISLOCATION, OR FAILURE. WHERE EROSION IS OBSERVED, MAINTENANCE: MATERIALS AND ANY UNSTABLE SOIL AND EITHER SALVAGE OR DISPOSE OF IT PROPERLY. BRING
APPLY ADDITIONAL MULCH. IF WASHOUT OCCURS, REPAIR THE SLOPE GRADE, INSPECT RIPRAP OUTLET STRUCTURES AFTER HEAVY RAINS TO SEE IF ANY EROSION AROUND OR BELOW THE DISTURBED AREA TO PROPER GRADE, THEN SMOOTH AND COMPACT IT. APPROPRIATELY
RESEED, AND REINSTALL MULCH. CONTINUE INSPECTIONS UNTIL VEGETATION THE RIPRAP HAS TAKEN PLACE OR IF STONES HAVE BEEN DISLODGED. IMMEDIATELY MAKE ALL NEEDED STABILIZE ALL BARE AREAS AROUND THE INLET.
IS FIRMLY ESTABLISHED. REPAIRS TO PREVENT FURTHER DAMAGE.
CHANNEL PROTECTION RIP RAP OUTLET PROTECTION TEMPORARY BLOCK
s AND GRAVEL DROP INLET PROTECTION
C501 C501
1 S, NEW RIPRAP TO
EXTEND TO TOP "B" MIN.
OF EXISTING BOTTOM WI[
CHANNEL BANKS
A
CLASS B EROSION
CONTROL STONE
WASHED STONE
(8" TOP LAYER)
00 00
FILTER GOQO�O�gqOOQ�0�q
FABRIC 0, - 0 �CJ O O �00CJ O 0
_ Ua
SECTION A -A
CONSTRUCTION SPECIFICATIONS:
1. PLACE STONE TO THE LINES AND DIMENSIONS SHOWN IN THE PLAN ON A FILTER
FABRIC FOUNDATION.
2. KEEP THE CENTER STONE SECTION AT LEAST 9-INCHES BELOW NATURAL GROUND
LEVEL WHERE THE DAM ABUTS THE CHANNEL BANKS.
3. EXTEND STONE AT LEAST 1.5-FT BEYOND THE DITCH BANKS TO KEEP OVERFLOW
WATER FROM UNDERCUTTING THE DAM AS IT RE-ENTERS THE CHANNEL.
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 DOWNSTREAM FROM THE LOWEST CHECK DAM,
CONSIDERING THAT WATER WILL FLOW OVER AND AROUND THE DAM.
6. MAKE SURE THAT THE CHANNEL REACH ABOVE THE MOST UPSTREAM DAM
IS STABLE.
7. ENSURE THAT CHANNEL APPURTENANCES, SUCH AS CULVERT ENTRANCES BELOW
CHECK DAMS, ARE NOT SUBJECT TO DAMAGE OR BLOCKAGE FROM DISPLACED
STONES.
MAINTENANCE:
1. INSPECT CHECK DAMS AND CHANNELS FOR DAMAGE AFTER EACH RUNOFF
EVENT.
2. ANTICIPATE SUBMERGENCE AND DEPOSITION ABOVE THE CHECK DAM AND
EROSION FROM FLOWS AROUND THE EDGES OF THE DAM. CORRECT ALL
DAMAGE IMMEDIATELY. IF SIGNIFICANT EROSION OCCURS BETWEEN DAMS,
INSALL 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 THE CHANNEL TO DRAIN THROUGH
THE STONE CHECK DAM AND PREVENT LARGE FLOWS FROM CARRYING SEDIMENT
OVER THE DAM. ADD STONES TO DAMS AS NEEDED TO MAINTAIN DESIGN WEIGHT
AND CROSS SECTION.
TEMPORARY GRAVEL CHECK DAM
all r I „B„
1�
t
"P RIPRAP
BURY ENDS OF
THICKNESS
FILTER FABRIC
12" MINIMUM
TYPICAL
MINIMUM "00" STONE
SIZE AS INDICATED
FILTER FABRIC TYPICAL
SUBGRADE PREPARATION - PREPARE THE SUBGRADE FOR RIPRAP AND FILTER TO THE REQUIRED LINES
AND GRADES INDICATED ON THE PLANS. COMPACT ANY FILL REQUIRED IN THE SUBGRADE TO A
DENSITY APPROXIMATING THAT OF THE SURROUNDING UNDISTURBED MATERIAL OR OVERFILL
DEPRESSIONS WITH RIPRAP. REMOVE BRUSH, TREES, STUMPS AND OTHER OBJECTIONABLE MATERIAL.
CUT THE SUBGRADE SUFFICIENTLY DEEP THAT THE FINISHED GRADE OF THE RIPRAP WILL BE AT THE
ELEVATION OF THE SURROUNDING AREA. CHANNELS SHOULD BE EXCAVATED SUFFICIENTLY TO ALLOW
PLACEMENT OF THE RIPRAP IN A MANNER SUCH THAT THE FINISHED INSIDE DIMENSIONS AND GRADE
OF THE RIPRAP MEET DESIGN SPECIFICATIONS.
SYNTHETIC FILTER FABRIC - PLACE THE FILTER FABRIC DIRECTLY ON THE PREPARED SUBGRADE. OVERLAP
THE EDGES BY AT LEAST 12-INCHES AND SPACE ANCHOR PINS EVERY 3-FEET ALONG THE OVERLAP. BURY
THE UPPER AND LOWER ENDS OF THE CLOTH A MINIMUM OF 12-INCHES BELOW GROUND. TAKE CARE
NOT TO DAMAGE THE CLOTH WHEN PLACING RIPRAP. IF DAMAGE OCCURS, REMOVE THE RIPRAP AND
REPAIR THE SHEET BY ADDING ANOTHER LAYER OF FILTER MATERIAL WITH A MINIMUM OVERLAP OF
12-INCHES AROUND THE DAMAGED AREA. IF EXTENSIVE DAMAGE IS SUSPECTED, REMOVE AND REPLACE
THE ENTIRE SHEET.
WHERE LARGE STONES ARE USED OR MACHINE PLACEMENT IS DIFFICULY, A 4-INCH LAYER OF FINE
GRAVEL OR SAND MAY BE NEEDED TO PROTECT THE FILTER CLOTH.
STONE PLACEMENT - PLACEMENT OF RIPRAP SHOULD FOLLOW IMMEDIATELY AFTER PLACEMENT OF THE
FILTER FABRIC. PLACE RIPRAP SO THAT IT FORMS A DENSE, WELL -GRADED MASS OF STONE WITH A
MINIMUM OF VOIDS. THE DESIRED DISTRIBUTION OF STONES THROUGHOUT THE MASS MAY BE OBTAINED
BY SELECTIVE LOADING AT THE QUARRY AND CONTROLLED DUMPING DURING FINAL PLACEMENT.
PLACE RIPRAP TO ITS FULL THICKNESS IN ONE OPERATION. DO NOT PLACE RIPRAP BY DUMPING
THROUGH CHUTES OR OTHER METHODS THAT CAUSE SEGREGATION OF STONE SIZES. TAKE CARE NOT
TO DISLODGE THE UNDERLYING BASE OF FILTER FABRIC WHEN PLACING THE STONES.
THE FINISHED SLOPE SHOULD BE FREE OF POCKETS OF SMALL STONE OR CLUSTERS OF LARGE STONES.
HAND PLACING MAY BE NECESSARY TO ACHIEVE THE PROPER DISTRIBUTION OF STONE SIZES TO
PRODUCE A RELATIVELY SHOOTH, UNIFORM SURFACE. THE FINISHED GRADE OF THE RIPRAP SHOULD
BLEND (MATCH GRADE) WITH THE SURROUNDING AREA. NO OVERFALL OR PROTRUSION OF RIPRAP
SHOULD BE APPARENT WHICH WOULD IMPAIR STREAM FLOWS.
RIP RAP CHANNEL PROTECTION
EXISTING
GRADE
WIRE MESH
SUPPORT FENCE a
STEEL POST TYP.
FILTER FABRIC
4"
MATERIAL SPECIFICATIONS:
1. USE A SYNTHETIC FILTER FABRIC OF AT LEAST 95% BY WEIGHT OF POLYOLEFINS OR POLYESTER, WHICH
IS CERTIFIED BY THE MANUFACTURER OR SUPPLIER AS CONFORMING TO THE REQUIREMENTS IN ASTM
D6461.
2. SYNTHETIC FILTER FABRIC SHOULD CONTAIN ULTRAVIOLET RAY INHIBITORS AND STABILIZERS.
3. ENSURE THAT POSTS FOR SEDIMENT FENCES ARE 1.33 LB/LINEAR FEET STEEL WITH A MINIMUM LENGTH
OF 5-FEET. MAKE SURE THAT STEEL POSTS HAVE PROJECTIONS TO FACILITATE FASTENING THE FABRIC.
4. FOR REINFORCEMENT OF STANDARD STRENGTH FILTER FABRIC, USE WIRE FENCE WITH A MINIMUM 14-
GUAGE AND A MAXIMUM MESH SPACING OF 6-INCHES.
CONSTRUCTION SPECIFICATIONS:
1. CONSTRUCT THE SEDIMENT BARRIER OF STANDARD STRENGTH OR EXTRA STRENGTH SYNTHETIC FILTER
FABRICS.
2. ENSURE THAT THE HEIGHT OF THE SEDIMENT FENCE DOES NOT EXCEED 18-INCHES ABOVE THE GROUND
SURFACE (HIGHER FENCES MAY IMPOUND VOLUMES OF WATER SUFFICIENT TO CAUSE FAILURE OF THE
STRUCTURE).
3. CONSTRUCT THE FILTER FABRIC FROM A CONTINUOUS ROLL CUT TO THE LENGTH OF THE BARRIER TO
AVOID JOINTS. WHEN JOINTS ARE NECESSARY, SECURELY FASTEN THE FILTER CLOTH ONLY AT A
SUPPORT POST WITH OVERLAP TO THE NEXT POST.
4. SUPPORT STANDARD STRENGTH FILTER FABRIC BY WIRE MESH FASTENED SECURLY TO THE UPSLOPE SIDE
OF THE POSTS USING HEAVY DUTY TIE WIRES. EXTEND THE WIRE MESH SUPPORT TO THE BOTTOM OF THE
TRENCH.
5. WHEN A WIRE MESH SUPPORT FENCE IS USED, SPACE POSTS A MAXIMUM OF 8-FEET APART. STEEL
SUPPORT POSTS SHOULD BE DRIVEN SECURELY INTO THE GROUND TO A MINIMUM OF 18-INCHES.
WIRE MESH SUPPORT FENCE MATERIAL SHALL BE AGRICULTURAL QUALITY 14-GAGE ANNEALED
STEEL WIRE WITH A 4" x 5" MAX. SPACING PATTERN.
6. EXTRA STRENGTH FILTER FABRIC WITH 6-FT POST SPACING DOES NOT REQUIRE WIRE MESH SUPPORT
FENCE. TIE WIRE THE FILTER FABRIC DIRECTLY TO POSTS.
7. EXCAVATE A TRENCH APPROXIMATELY 4-INCHES WIDE AND 8-INCHES DEEP ALONG THE PROPOSED
LINE OF POSTS AND UPSLOPE FROM THE BARRIER.
8. BACKFILL THE TRENCH WITH COMPACTED SOIL PLACED OVER THE FILTER FABRIC.
9. DO NOT ATTACH FILTER FABRIC TO EXISTING TREES.
MAINTENANCE:
1. INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REQUIRED
REPAIRS IMMEDIATELY. SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE OR
BECOME INNEFECTIVE, REPLACE IT PROMPTLY. REPLACE BURLAP EVERY 60 DAYS.
2. REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE
NEXT RAIN AND TO REDUCE PRESSURE ON THE FENCE. TAKE CARE TO AVOID UNDERMINING THE
FENCE DURING CLEANOUT. REMOVE ALL FENCING MATERIALS AND UNSTABILIZED SEDIMENT DEPOSITS.
BRING THE AREA TO GRADE AND STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN
PROPERLY STABILIZED.
TEMPORARY SEDIMENT FENCE
COMPACTED FILL
SECTION A -A
1. ENSURE THAT THE SUBGRADE FOR THE RIPRAP FOLLOWS THE REQUIRED LINES AND
GRADES SHOWN IN THE PLAN. COMPACT ANY FILL REQUIRED IN THE SUBGRADE TO
THE DENSITY OF THE SURROUNDING UNDISTURBED MATERIAL. LOW AREAS IN THE
SUBGRADE ON UNDISTURBED SOIL MAY ALSO BE FILLED BY INCREASING THE RIPRAP
THICKNESS.
2. RIPRAP MAY BE PLACED BY EQUIPMENT.
3. THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE 1.5 TIMES THE MAXIMUM STONE
DIAMETER.
4. RIPRAP MAY BE FIELD STONE OR ROUGH QUARRY STONE. IT SHOULD BE HARD,
ANGULAR, HIGHLY WEATHER -RESISTANT AND WELL GRADED.
5. CONSTRUCT THE APRON ON ZERO GRADE WITH NO OVERFALL AT THE END. MAKE THE
TOP OF THE RIPRAP AT THE DOWNSTREAM END LEVEL WITH THE RECEIVING AREA OR
SLIGHTLY BELOW IT.
6. ENSURE THAT THE APRON IS PROPERLY ALIGNED WITH THE RECEIVING STREAM AND
PREFERABLE STRAIGHT THROUGHOUT ITS LENGTH. IF A CURVE IS NEEDED TO FIT SITE
CONDITIONS, PLACE IT IN THE UPPER SECTION OF THE APRON.
7. IMMEDIATELY AFTER CONSTRUCTION, STABILIZE ALL DISTURBED AREAS WITH VEGETATION.
MAINTENANCE
INSPECT RIPRAP OUTLET STRUCTURES AFTER HEAVY RAINS TO SEE IF ANY EROSION
AROUND OR BELOW THE RIPRAP HAS TAKEN PLACE OR IF STONES HAVE BEEN
DISLODGED. IMMEDIATELY MAKE ALL NEEDED REPAIRS TO PREVENT FURTHER
DAMAGE.
TEMPORARY SEDIMENT
TRAP RIP RAP OUTLET PROTECTION
DIKE
HOLD-DOWN STAKES -,
PLASTIC
CORRUGATED
PIPE (PER PLAN)
STABILIZE - OUTLET Pi
PLAN VIEW I FLOW
STANDARD T-SECTION
CONSTRUCTION SPECIFICATIONS
A COMMON FAILURE OF SLOPE DRAINS IS CAUSED BY WATER SATURATING THE SOIL
AND SEEPING ALONG THE PIPE. THIS CREATES VOIDS FROM CONSOLIDATION AND
PIPING AND CAUSES WASHOUTS. PROPER BACKFILLING AROUND AND UNDER THE
PIPE "HAUNCHES" WITH STABLE SOIL MATERIAL AND HAND COMPACTION IN 6-INCH
LIFTS TO ACHIEVE FIRM CONTACT BETWEEN THE PIPE AND THE SOIL AT ALL POINTS WILL
ELIMINATE THIS TYPE OF FAILURE.
1. PLACE SLOPE DRAINS ON UNDISTURBED SOIL OR WELL -COMPACTED FILL AT LOCATIONS
AND ELEVATIONS SHOWN ON THE PLANS.
2. SLIGHTLY SLOPE THE SECTION OF PIPE UNDER THE DIKE TOWARD ITS OUTLET.
3. HAND TAMP THE SOIL UNDER AND AROUND THE ENTRANCE SECTION IN LIFTS NOT TO
EXCEED 6-INCHES.
4. ENSURE THAT FILL OVER THE DRAIN AT THE TOP OF THE SLOPE HAS MINIMUM
DIMENSIONS OF 1.5 FT. DEPTH, 4 FT. TOP WIDTH, AND 3:1 SIDE SLOPES.
5. ENSURE THAT ALL SLOPE DRAIN CONNECTIONS ARE WATERTIGHT.
6. ENSURE THAT ALL FILL MATERIAL IS WELL -COMPACTED. SECURELY FASTEN THE
EXPOSED SECTION OF THE DRAIN WITH GROMMETS OR STAKES SPACED NO MORE
THAN 10-FEET APART.
7. EXTEND THE DRAIN BEYOND THE TOE OF THE SLOPE AND ADEQUATELY PROTECT THE
OUTLET FROM EROSION.
8. MAKE THE SETTLED, COMPACTED DIKE RIDGE NO LESS THAN 1-FEET ABOVE THE TOP
OF THE PIPE AT EVERY POINT.
9. IMMEDIATELY STABILIZE ALL DISTURBED AREAS FOLLOWING CONSTRUCTION.
MAINTENANCE:
INSPECT THE SLOPE DRAIN AND SUPPORTING DIVERSION AFTER EVERY RAINFALL
AND PROMPTLY MAKE NECESSARY REPAIRS. WHEN THE PROTECTED AREA HAS BEEN
PERMANENTLY STABILIZED. TEMPORARY MEASURES MAY BE REMOVED, MATERIALS
DISPOSED OF PROPERLY, AND ALL DISTURBED AREAS STABILIZED APPROPRIATELY.
TEMPORARY SLOPE DRAIN
WIDTH OF
NT TRAP
'WEIR
1.5' MIN.
STONE INLET
PROTECTION
(TYP.)
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
F T o�G���N
T T T
L T -1
© 2019 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Mr. Chad Threatt, VP
Alamance County Mine
NO: DATE: DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
REVIEW
DATE:
5/8/19
DRAWING NAME:
EROSION AND
SEDIMENT CONTROL
DETAILS
DRAWING NUMBER:
C501