SW3220601_Plansheet C211 - SCM Detail_20221012

NOTES:
1. La IS THE LENGTH OF THE RIPRAP APRON.
2. d=1.5 TIMES THE MAXIMUM STONE DIAMETER BUT NOT LESS THAN 6".
3. IN A WELL DEFINED CHANNEL EXTEND THE APRON UP THE CHANNEL BANKS TO AN ELEVATION OF 6" ABOVE THE MAXIMUM
TAILWATER DEPTH OR TO THE TOP OF THE BANK, WHICHEVER IS LESS.
4. A FILTER BLANKET OR FILTER FABRIC SHOULD BE INSTALLED BETWEEN THE RIPRAP AND SOIL FOUNDATION.
■ W1=3do
PIPE OUTLET TO FLAT AREA -
NO WELL DEFINED CHANNEL.
PIPE OUTLET TO WELL DEFINED CHANNEL
10'"
(TYP.
PLAN
W2 (d + L)
SECTION AA
CULVERT DETAILS
r- La
RCP
=rI Eli, III L=I: Eli, AI I I I
SECTION B-B
ALL RIP -RAP TO BE NCDOT CLASS
LENGTH OF APRON
LI (ZONE 1)
L2 (ZONE 2)
ZONES 1 & 2
STONE FILLING
TO PREVENT SCOUR
TO PREVENT SCOUR
ZONE 1: CLASS A
ZONE 2: CLASS B
4 x DO
6 x DO
W 1=(3)*(DO)
ZONE 1: LA=(4)*(Do) ; ZONE 2: LA=(6)*(Do)
W2-(Do)+(La)
* NOTE: ALL APRONS (La) MUST BE A MINIMUM OF 10 FT. IN LENGTH.
CULVERT #
W1 (FT)
La (FT)
W2 (FT)
PIPE #6
6.0
10.0
6.0
PIPE #7
4.5
10.0
6.0
PIPE #8
4.5
10.0
6.0
NOTE:
SEE DRAINAGE REPORT FOR PIPE FLOW CALCULATIONS.
OUTLET PROTECTION
SOIL/SEDIMENT
STOCKPILE AREA
ORIGINAL GROUND SURFACE
NOTES:
1. SILT FENCE TO EXTEND AROUND ENTIRE PERIMETER OF STOCKPILE, OR IF
STOCKPILE AREA IS LOCATED ON/NEAR A SLOPE THE SILT FENCE IS TO
EXTEND ALONG CONTOURS OF THE DOWN -GRADIENT AREA.
2. IF STOCKPILE IS TO REMAIN FOR MORE THAN 14 DAYS, TEMPORARY
STABILIZATION MEASURES MUST BE IMPLEMENTED.
3. SILT FENCE SHALL BE MAINTAINED UNTIL STOCKPILE AREA HAS EITHER BEEN
REMOVED OR PERMANENTLY STABILIZED.
4. THE KEY TO FUNCTIONAL TEMPORARY STOCKPILE AREAS IS WEEKLY
INSPECTIONS, ROUTINE MAINTENANCE, AND REGULAR SEDIMENT REMOVAL.
SILT FENCE
(SEE DETAIL)
FILTER
BLANKET
*NOTE:
IN LOOSE SOIL CONDITIONS, THE USE OF
STAPLE OR STAKE LENGTHS GREATER
THAN 6"(15CM) MAY BE NECESSARY TO
PROPERLY SECURE THE RECP'S.
0
SEE SHEET C201 FOR RECPS INSTALLATION
LOCATIONS
1. PREPARE SOIL BEFORE INSTALLING ROLLED EROSION CONTROL PRODUCTS (RECPS), INCLUDING ANY
NECESSARY APPLICATION OF LIME, FERTILIZER, AND SEED.
2.13EGIN AT THE TOP OF THE SLOPE BY ANCHORING THE RECPS IN A 6"(15CM) DEEP X 6"(15CM)
WIDE TRENCH WITH APPROXIMATELY 12" (30CM) OF RECPS EXTENDED BEYOND THE UP -SLOPE
PORTION OF THE TRENCH. ANCHOR THE RECPS WITH A ROW OF STAPLES/STAKES APPROXIMATELY
12" (30CM) APART IN THE BOTTOM OF THE TRENCH. BACKFILL AND COMPACT THE TRENCH AFTER
STAPLING. APPLY SEED TO THE COMPACTED SOIL AND FOLD THE REMAINING 12"(30CM) PORTION OF
RECPS BACK OVER THE SEED AND COMPACTED SOIL. SECURE RECPS OVER COMPACTED SOIL WITH A
ROW OF STAPLES/STAKES SPACED APPROXIMATELY 12"(30CM) APART ACROSS THE WIDTH OF THE
RECPS.
3.ROLL THE RECPS (A) DOWN OR (B) HORIZONTALLY ACROSS THE SLOPE. RECPS WILL UNROLL WITH
APPROPRIATE SIDE AGAINST THE SOIL SURFACE. ALL RECPS MUST BE SECURELY FASTENED TO SOIL
SURFACE BY PLACING STAPLES/STAKES IN APPROPRIATE LOCATIONS AS SHOWN IN THE STAPLE
PATTERN GUIDE.
4.THE EDGES OF PARALLEL RECPS MUST BE STAPLED WITH APPROXIMATELY 2" - 5" (5-12.5CM)
OVERLAP DEPENDING ON THE RECPS TYPE.
5.CONSECUTIVE RECPS SPLICED DOWN THE SLOPE MUST BE END OVER END (SHINGLE STYLE) WITH AN
APPROXIMATE 3"(7.5CM) OVERLAP. STAPLE THROUGH OVERLAPPED AREA, APPROXIMATELY 12"(30CM)
APART ACROSS ENTIRE RECPS WIDTH.
SLOPE MATTING SHALL BE NORTH AMERICAN
GREEN S125 OR APPROVED EQUAL
SLOPE MATTING INSTALLATION DETAIL
IMN
C
F
" FABRIC
SECTION VIEW LOOKING UPSTREAM
6" OF #57
WASHED STONE
�W
N o
I-4 TO 6 FEET
SECTION A - A CENTER OF DAM
NOTES:
1. KEY STONE INTO THE DITCH BANKS AND EXTEND
IT BEYOND THE ABUTMENTS A MINIMUM OF 18"
TO PREVENT OVER FLOW AROUND DAM.
2. DRAINAGE AREA IS LIMITED TO 1/2 ACRE.
3. MAX HEIGHT AT CENTER OF DAM- 24"
4. CENTER OF DAM 9" BELOW NATURAL GROUND AT
OUTER EDGES. OUTER EDGES TO BE PLACED OVER
THE CHANNEL BANKS TO KEEP WATER FROM
CUTTING AROUND THE DAM.
5. SPACE CHECK DAMS IN A CHANNEL SO THAT THE
CREST OF DOWNSTREAM DAM IS AT ELEVATION OF
THE TOE OF UPSTREAM DAM.
FILTER CLOTH
'L' = THE DISTANCE SUCH THAT POINTS A & B ARE OF EQUAL ELEVATIONS 'L'
I'
SPACING BETWEEN CHECK DAMS
15A NCAC 04B .0131 SELF -INSPECTIONS
WHERE INSPECTIONS ARE REQUIRED BY G.S. 113A-54.1(E), THE FOLLOWING APPLY:
1. THE PERSON WHO PERFORMS THE INSPECTION SHALL MAKE A RECORD OF THE SITE INSPECTION BY
DOCUMENTING THE FOLLOWING ITEMS:
12" 30cm
a. ALL OF THE EROSION AND SEDIMENTATION CONTROL MEASURES, PRACTICES AND DEVICES, AS CALLED
4"(10cm) FOR IN A CONSTRUCTION SEQUENCE CONSISTENT WITH THE APPROVED EROSION AND SEDIMENTATION
CONTROL PLAN, INCLUDING BUT NOT LIMITED TO SEDIMENTATION CONTROL BASINS, SEDIMENTATION
611 1 1=1 11- - TRAPSSEDIMENTATION PONDSROCK DAMSTEMPORARY DIVERSIONS, TEMPORARY SLOPE DRAINS,
I I ME] I = 11 I I 111 \\\�\ 1- 6" ROCK 'CHECK DAMS, SEDIMENT, FENCE OR B,ARRIERS, ALL FORMS OF INLET PROTECTION, STORM
(15cm) 1-1II III-1 I-1 (15cm) 4"(10cm) DRAINAGE FACILITIES, ENERGY DISSIPATERS, AND STABILIZATION METHODS OF OPEN CHANNELS, HAVE
INITIALLY BEEN INSTALLED AND DO NOT SIGNIFICANTLY DEVIATE (AS DEFINED IN SUB -ITEM (1)(E) OF
-
I=II III III THIS RULE) FROM THE LOCATIONS, DIMENSIONS AND RELATIVE ELEVATIONS SHOWN ON THE APPROVED
0 EROSION AND SEDIMENTATION PLAN. SUCH DOCUMENTATION SHALL BE ACCOMPLISHED BY INITIALING
AND DATING EACH MEASURE OR PRACTICE SHOWN ON A COPY OF THE APPROVED EROSION AND
6" 2"-5" SEDIMENTATION CONTROL PLAN OR BY COMPLETING, DATING AND SIGNING AN INSPECTION REPORT
(15cm) (5-12.5cm) THAT LISTS EACH MEASURE, PRACTICE OR DEVICE SHOWN ON THE APPROVED EROSION AND
SEDIMENTATION CONTROL PLAN. THIS DOCUMENTATION IS REQUIRED ONLY UPON THE INITIAL
INSTALLATION OF THE EROSION AND SEDIMENTATION CONTROL MEASURES, PRACTICES AND DEVICES AS
SET FORTH BY THE APPROVED EROSION AND SEDIMENTATION CONTROL PLAN OR IF THE MEASURES,
• PRACTICES AND DEVICES ARE MODIFIED AFTER INITIAL INSTALLATION;
4"-6" b. THE COMPLETION OF ANY PHASE OF GRADING FOR ALL GRADED SLOPES AND FILLS SHOWN ON THE
(10-15cm) 03 APPROVED EROSION AND SEDIMENTATION CONTROL PLAN, SPECIFICALLY NOTING THE LOCATION AND
© CONDITION OF THE GRADED SLOPES AND FILLS. SUCH DOCUMENTATION SHALL BE ACCOMPLISHED BY
�� I I •� • INITIALING AND DATING A COPY OF THE APPROVED EROSION AND SEDIMENTATION CONTROL PLAN OR
�•" `� ^ ��� ,, ..� BY COMPLETING, DATING AND SIGNING AN INSPECTION REPORT;
c. THE LOCATION OF TEMPORARY OR PERMANENT GROUND COVER, AND THAT THE INSTALLATION OF THE
® I I I �••• GROUND COVER DOES NOT SIGNIFICANTLY DEVIATE (AS DEFINED IN SUB -ITEM (1)(E) OF THIS RULE)
FROM THE APPROVED EROSION AND SEDIMENTATION CONTROL PLAN. SUCH DOCUMENTATION SHALL BE
II ++ V' �• ` ACCOMPLISHED BY INITIALING AND DATING A COPY OF THE APPROVED EROSION AND SEDIMENTATION
CONTROL PLAN OR BY COMPLETING, DATING AND SIGNING AN INSPECTION REPORT;
III Vim•• •+�. • �'•�•- • ', d. THAT MAINTENANCE AND REPAIR REQUIREMENTS FOR ALL TEMPORARY AND PERMANENT EROSION AND
SEDIMENTATION CONTROL MEASURES, PRACTICES AND DEVICES HAVE BEEN PERFORMED. SUCH
DOCUMENTATION SHALL BE ACCOMPLISHED BY COMPLETING, DATING AND SIGNING AN INSPECTION
REPORT (THE GENERAL STORM WATER PERMIT MONITORING FORM MAY BE USED TO VERIFY THE
MAINTENANCE AND REPAIR REQUIREMENTS); AND
6"11=1 11=1
15cm) -1 1 1 1-1 1-1 I I-_ _ I I -_I I MI I I -I I I- e. ANY SIGNIFICANT DEVIATIONS FROM THE APPROVED EROSION AND SEDIMENTATION CONTROL PLAN,
=1 1 I 1 1 I I I=I I I=I I I=I I I=I I I- _ _ _ _ = I I I=I I MI I MI I MI CORRECTIVE ACTIONS REQUIRED TO CORRECT THE DEVIATION AND COMPLETION OF THE CORRECTIVE
ACTIONS. SUCH DOCUMENTATION SHALL BE ACCOMPLISHED BY INITIALING AND DATING A COPY OF THE
APPROVED EROSION AND SEDIMENTATION CONTROL PLAN OR BY COMPLETING, DATING AND SIGNING AN
INSPECTION REPORT. A SIGNIFICANT DEVIATION MEANS AN OMISSION, ALTERATION OR RELOCATION OF
CRITICAL POINTS NOTES: AN EROSION OR SEDIMENTATION CONTROL MEASURE THAT PREVENTS THE MEASURE FROM PERFORMING
A. OVERLAPS AND SEAMS *HORIZONTAL STAPLE SPACING AS INTENDED.
B. PROJECTED WATER LINE SHOULD BE ALTERED IF
C. CHANNEL BOTTOM/SIDE NECESSARY TO ALLOW STAPLES 2. THE DOCUMENTATION, WHETHER ON A COPY OF THE APPROVED EROSION AND SEDIMENTATION CONTROL
SLOPE VERTICES TO SECURE THE CRITICAL POINTS PLAN OR AN INSPECTION REPORT, SHALL INCLUDE THE NAME, ADDRESS, AFFILIATION, TELEPHONE
A A ALONG THE CHANNEL SURFACE. NUMBER, AND SIGNATURE OF THE PERSON CONDUCTING THE INSPECTION AND THE DATE OF THE
B INSPECTION. ANY RELEVANT LICENSES AND CERTIFICATIONS MAY ALSO BE INCLUDED. ANY
C B C **IN LOOSE SOIL CONDITIONS, THE DOCUMENTATION OF INSPECTIONS THAT OCCUR ON A COPY OF THE APPROVED EROSION AND
USE OF STAPLE OR STAKE SEDIMENTATION CONTROL PLAN SHALL OCCUR ON A SINGLE COPY OF THE PLAN AND THAT PLAN
LENGTHS GREATER THAN 6"(15CM) SHALL BE MADE AVAILABLE ON THE SITE. ANY INSPECTION REPORTS SHALL ALSO BE MADE AVAILABLE
MAY BE NECESSARY TO PROPERLY ON THE SITE.
SECURE THE RECPS. 3. THE INSPECTION SHALL BE PERFORMED DURING OR AFTER EACH OF THE FOLLOWING PHASES OF A
PLAN:
1. PREPARE SOIL BEFORE INSTALLING ROLLED EROSION CONTROL PRODUCTS (RECPS), INCLUDING ANY NECESSARY APPLICATION OF LIME, FERTILIZER,
AND SEED. a. INSTALLATION OF PERIMETER EROSION AND SEDIMENT CONTROL MEASURES;
2.BEGIN AT THE TOP OF THE CHANNEL BY ANCHORING THE RECPS IN A 6"(15CM) DEEP X 6"(15CM) WIDE TRENCH WITH APPROXIMATELY 12"(30CM)
OF RECPS EXTENDED BEYOND THE UP -SLOPE PORTION OF THE TRENCH. USE SHOREMAX MAT AT THE CHANNEL/CULVERT OUTLET AS b. CLEARING AND GRUBBING OF EXISTING GROUND COVER;
SUPPLEMENTAL SCOUR PROTECTION AS NEEDED. ANCHOR THE RECPS WITH A ROW OF STAPLES/STAKES APPROXIMATELY 12"(30CM) APART IN
THE BOTTOM OF THE TRENCH. BACKFILL AND COMPACT THE TRENCH AFTER STAPLING. APPLY SEED TO THE COMPACTED SOIL AND FOLD THE c. COMPLETION OF ANY PHASE OF GRADING OF SLOPES OR FILLS THAT REQUIRES PROVISION OF
REMAINING 12"(30CM) PORTION OF RECPS BACK OVER THE SEED AND COMPACTED SOIL. SECURE RECPS OVER COMPACTED SOIL WITH A ROW OF 2
STAPLES/STAKES SPACED APPROXIMATELY 12" APART ACROSS THE WIDTH OF THE RECPS. TEMPORARY OR PERMANENT GROUND COVER PURSUANT TO G.S. 113A-57 ( ):
3.ROLL CENTER RECPS IN DIRECTION OF WATER FLOW IN BOTTOM OF CHANNEL. RECPS WILL UNROLL WITH APPROPRIATE SIDE AGAINST THE SOIL
SURFACE. ALL RECPS MUST BE SECURELY FASTENED TO SOIL SURFACE BY PLACING STAPLES/STAKES IN APPROPRIATE LOCATIONS AS SHOWN IN d. COMPLETION OF STORM DRAINAGE FACILITIES;
THE STAPLE PATTERN GUIDE.
4.PLACE CONSECUTIVE RECPS END -OVER -END (SHINGLE STYLE) WITH A 4"-6" OVERLAP. USE A DOUBLE ROW OF STAPLES STAGGERED 4" APART e. COMPLETION OF CONSTRUCTION OR DEVELOPMENT; AND
AND 4" ON CENTER TO SECURE RECPS.
5.FULL LENGTH EDGE OF RECPS AT TOP OF SIDE SLOPES MUST BE ANCHORED WITH A ROW OF STAPLES/STAKES APPROXIMATELY 12"(30CM) f. QUARTERLY UNTIL THE ESTABLISHMENT OF PERMANENT GROUND COVER SUFFICIENT TO RESTRAIN
APART IN A 6"(15CM) DEEP X 6"(15CM) WIDE TRENCH. BACKFILL AND COMPACT THE TRENCH AFTER STAPLING. EROSION OR UNTIL THE FINANCIALLY RESPONSIBLE PARTY HAS CONVEYED OWNERSHIP OR CONTROL OF
6.ADJACENT RECPS MUST BE OVERLAPPED APPROXIMATELY 2"-5" (5-12.5CM) (DEPENDING ON RECPS TYPE) AND STAPLED. THE TRACT OF LAND FOR WHICH THE EROSION AND SEDIMENTATION CONTROL PLAN HAS BEEN
7.IN HIGH FLOW CHANNEL APPLICATIONS A STAPLE CHECK SLOT IS RECOMMENDED AT 30 TO 40 FOOT (9 -12M) INTERVALS. USE A DOUBLE ROW APPROVED AND THE AGENCY THAT APPROVED THE PLAN HAS BEEN NOTIFIED. IF THE FINANCIALLY
OF STAPLES STAGGERED 4"(10CM) APART AND 4"(10CM) ON CENTER OVER ENTIRE WIDTH OF THE CHANNEL. RESPONSIBLE PARTY HAS CONVEYED OWNERSHIP OR CONTROL OF THE TRACT OF LAND FOR WHICH
&THE TERMINAL END OF THE RECPS MUST BE ANCHORED WITH A ROW OF STAPLES/STAKES APPROXIMATELY 12" (30CM) APART IN A 6"(15CM) THE EROSION AND SEDIMENTATION CONTROL PLAN HAS BEEN APPROVED, THE NEW OWNER OR PERSON
DEEP X 6"(15CM) WIDE TRENCH. BACKFILL AND COMPACT THE TRENCH AFTER STAPLING. IN CONTROL SHALL CONDUCT AND DOCUMENT INSPECTIONS QUARTERLY UNTIL THE ESTABLISHMENT OF
PERMANENT GROUND COVER SUFFICIENT TO RESTRAIN EROSION.
FLOW
VARIES
FLOW
OTTOM WIDTH - VARIES (SEE BELOW)
PERMANENT SWALES
SWALE
TDTAL DEPTH
SIDE SLOPE
BOTTOM WIDTH
(ft)
H:V
(ft)
1
1.5
3:1
4.5
2
1.5
3A
4.0
3
2.0
3:1
5.0
4
2.0
3:1
5.0
5
2.0
3A
5.0
6
4.5
3:1
6.0
7
2.5
3:1
3.0
8
2.0
3A
4.0
Permanent Swale Schedule
Swale #
Maximum Velocity
(fps)
Permissible Velocity
(fps)
Swale Liner: North
American Green (NAG)
or as Noted
1
1.34
6.0
NCDOT CLASS II RP
2
3.29
5.0
NAG DS 150
3
1.83
5.0
NAG DS 150
4
2.26
5.0
NAG DS 150
5
2.47
5.0
NAG DS 150
6
2.00
5.0
NAG DS 150
7
11.25
5.0
NAG DS 150
8
2.56
5.0
NAG DS 150
SEE EROSION CONTROL PLAN SHEETS FOR SWALE LOCATIONS
NOTE: SEE DRAINAGE REPORT FOR SWALE RUNOFF CALCULATIONS
I TEMPORARY STOCKPILE ROCK CHECK DAM PERMANENT SWALE AND MATTING INSTALLATION
DETAIL
SELF -INSPECTION REQUIREMENTS
COMPACTED SOIL
2:1 OR FLATTER
2'MIN.
EARTHEN CO
V
=1 I I� I I 1=1 fly �R
6' TYP.
18"MIN.
DIVERSION SWALE
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PERMIT REVIEW ISSUE
Oct 12. 2022 - 10:23am R:\FPS\PROJECTS\Unbn3oww\*411oughby Subatation\06-DWG\Wi1loughby-REV F.dwg
SHEET C211
PAGE 10 of 23