SW6240705_Plansheet - SCM Detail_20240927 (3)

1 2 3 4 5 6 7 8
4 X D OUTLET W/DITCH OUTLET W/O DITCH Oz z
D CLASS 'B' RIP RAP CLASS I RIP RAP CLASS 'B' RIP RAP CLASS I RIP RAP H} O
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TONS GEo- S.Y. TONS GEo- TONS GEo- S.Y. TONS GEo- Q Q GENERAL NOTES: * Q Q
TEXTILE TEXTILE TEXTILE TEXTILE
S_Y_ S.Y_ S_Y. S_Y_
12" 2 5 5 2 5 1 4 2 1 4 H U -USE CLASS 'A' RIP RAP. H M:U
CD
15" 2 7 7 3 7 1 5 3 2 6 LL _j 0- i z L� _j
O O 2 CONSTRUCT WIDTH AND SHAPE OF THE DITCHES AS * O O = z
18" 3 10 9 4 10 2 7 4 2 8 oC z SHOWN OR DIRECTED BY THE ENGINEER. cc
- - - - - - 24" 5 14 15 7 15 3 11 7 4 12 HUQO0= 1' 2-1 LL
0" HC)
� p 30" 8 21 21 11 22 5 16 11 7 17 Q H H -USE GEOTEXTILE UNDER CLASS 'A' RIP RAP IF Q H
~ = z w SPECIFIED ON PLANS. - - - - - = z Lu
36" 11 28 29 15 30 7 22 16 10 23 LL O J $„ CO�L�O J
42" 15 37 39 20 39 10 28 22 13 30 O cc O U *AS SPECIFIED ON PLANS. O O cA rr
° ° 48" - 49 26 50 - - 28 17 38 z > Q 1 z '>
- - - - - - - 54" - 60 33 62 36 21 47 7- w Cl 1 .5 MAX. 7- w H
�( O
l 60" - 73 40 75 44 26 56 T O r o D
t- - - - - - - 66" - - 87 48 89 - - 54 32 67 SLOPE DRAIN , BASE DITCH OR a
O,�cylp 72" - - 102 57 104 - - 64 38 78 Q
NOTE: 4 x D BERM DRAINAGE OUTLET DITCH GC
FOR CALCULATION PURPOSES W a
CLASS 'B' RIP RAP = 100 LBS. /FT3 CL
p ny CLASS I RIP RAP = 105 LBS. /FT3 _j
2'-0" 2'-0" BERM DITCH
�p p 2 X D n p n p O 0 3'-O ± 3 O ± MEDIAN DITCH O Q
LL. 12 VERTICAL CURVE U_
�p �p B D B CDC
a
8„ CD
Q a Q J
P LAN o Q °C v
0
0 8" o =
SLOPE 11/2: 1 OR FLATTER �j a H
° Q � MEDIAN OR BERM DITCH z 3
�p Q
D 1 > ~ 6'-0" _
H 2 < °C 12' V . C . ROADWAY DITCH
Opp P LAN o p D
T „
8 Q G
GEOTEXTILE MAINTENANCE: cr W
SECTION A-A p O�° �° O�° O� p 1. INSPECT AND REPAIR WEEKLY OR AFTER EACH 1/2 INCH Q
STORM EVENT AND REMOVE SEDIMENT. Z
PIPE OUTLET WITH DITCH 2. REPLACE STONE AS NEEDED TO MAINTAIN SPECIFIED SHOULDER �..�
C3 DIMENSIONS. POINT NOTE: "D" VARIES WITH LENGTH Q C
H= RIP RAP TO TOP OF PIPE (MAX. H = D + T) GEOTEXTILE Z 3. CAREFULLY CHECK STABILITY AT ROAD CROSSINGS, AND AND RATE OF SIDE SLOPES.
T= 15" CLASS I RIP RAP, UNLESS OTHERWISE SHOWN ON PLANS G
SECTION B-B LOOK FOR INDICATIONS OF PIPING, SCOUR HOLES, OR
T= 12" CLASS 'B' RIP RAP, UNLESS OTHERWISE SHOWN ON PLANS SHEET 1 OF 1 BANK FAILURES. MAKE REPAIRS IMMEDIATELY. SIDE DITCH SHEET 1 of 1
PIPE OUTLET WITHOUT DITCH 876 . 02 4. MAINTAIN ALL VEGETATION ADJACENT TO THE CHANNEL IN 876 03
A HEALTHY, VIGOROUS, CONDITION TO PROTECT THE AREA
MAINTENANCE: FROM SCOURING DURING OUT-OF-BANK FLOW
1. INSPECT AND REPAIR WEEKLY OR AFTER EACH 1/2 INCH
STORM EVENT AND REMOVE SEDIMENT. REMOVE ALL
ACCUMULATED SEDIMENT ON OUTLET PROTECTION.
2. REPLACE STONE AS NEEDED TO MAINTAIN SPECIFIED
DIMENSIONS. 2 RIP RAP CHANNEL
3. SEDIMENT SHALL BE DEPOSITED TO AN AREA THAT WILL K','*NN OUTLET PROTECTION
NOT CONTRIBUTE SEDIMENT OFF-SITE AND CAN BE OOC-01�-O NOT TO SCALE
PERMANENTLY STABILIZED. NOT TO SCALE 12" MIN.
EROSION CONTROL BLANKET
(NAG SC150 OR APPROVED EQUAL) 12" MIN.
STAPLE (TYP.)
SEEDING SCHEDULE: 3. IMMEDIATELY FOLLOWING SPREADING OF MULCH, SECURE 18"
WITH NETTING OR ASPHALT BINDER. MIN.
PERMANENT SEEDING: 4. APPLY ASPHALT BINDER AT A RATE OF 0.10 GALS PER SQUARE
PERFORM SPRING SEEDING BETWEEN FEBRUARY 1 AND APRIL 15. YARD (10 GALS/1,000 SQ FT) OR ANCHOR WITH LIGHTWEIGHT ANCHOR BLANKET IN TRENCH, BACKFILL AND
PERFORM FALL SEEDING BETWEEN AUGUST 20 AND OCTOBER 25. NETS STAPLED OVER MULCH. COMPACT BEFORE PROCEEDING WITH
SEEDING MIX: SLOPE VEGETATION SELECTION AND INSTALLATION PROCEDURE BY OTHERS. INSTALLATION. B
1. TALL FESCUE: 100 LBS/AC WOOD FIBER AND CELLULOSE FIBER MULCH (HYDROSEEDING):
2. COMMON BERMUDA GRASS: 25 LBS/AC (USE UNHULLED 1. USE WITH DARK GREEN MARKER DYE. 3:1 OR STEEPER SLOPE
SEEDING IN FALL) 2. pH: 5
3. KOBE LESPEDEZA: 10 LBS/AC (INCREASE TO 40 LBS/AC ON 3. MOISTURE CONTENT: 12% PLACE BLANKET ON SMOOTH FINISHED SURFACE.
SLOPES) 4. WOOD FIBER: 70% MAXIMUM IRREGULARITIES SHALL BE REMOVED TO PROVIDE CONTINUOUS CONTROL
NURSE PLANTS: 5. CELLULOSE FIBER: 30% MAXIMUM BLANKET CONTACT. SECTION
1. BETWEEN MAY 1 AND AUGUST 15, ADD 10 LBS/AC GERMAN 6. WATER HOLDING CAPACITY: 1100% MINIMUM
MILLET OR 15 LBS/AC SUDANGRASS 7. APPLY WITH SEED AS PART OF A HYDROSEEDER SLURRY. X
2. PRIOR TO MAY 1 AND AFTER AUGUST 15, ADD 40 LBS/AC RYE 12" MIN. STAPLE BLANKET AT 1 FOOT
(GRAIN) EROSION CONTROL MAT: A INTERVALS ALONG THE BOTTOM
ALTERNATE SEEDING MIX MAY BE PROPOSED BY CONTRACTOR FOR 1. ROLLED WOOD EXCELSIOR MATTING / OF THE TRENCH, BACKFILL INVERT
APPROVAL BY ENGINEER. 2. ALLOWABLE SHEAR STRESS: 1.75 PSF MINIMUM �\ AND COMPACT 3 3
3. LONGEVITY: 8
ONTHS
TEMPORARY SEEDING: 4. OP NET: HOTIO EGRADABLE POLYPROPYLENE I I 1 1
I�--►�12 MIN. � � WOVEN
\\� GEOTEXTILE
JANUARY 1 THROUGH MAY 1: 5. BOTTOM NET: NONE
b
1. RYE (GRAIN): 120 LBS/AC 6. FIBER MATRIX: 100% WOOD EXCELSIOR (0.5 LBS/SY) 80% OF MAINTENANCE NOTES: INSTALLATION NOTES:
2. KOBE LESPEDEZA: 50 LBS/AC FIBERS 6-INCHES OR MORE.
MAY 1 THROUGH AUGUST 15: 7. INSTALL PER DETAIL 7 ON SHEET OOC-02 OR MANUFACTURER'S 1. INSPECT ROLLED EROSION CONTROL PRODUCTS AT LEAST 1. SEED SLOPE FACE PRIOR TO PLACEMENT OF EROSION BLANKET.
1. GERMAN MILLET: 40 LBS/AC RECOMMENDATIONS. WEEKLY AND AFTER EACH SIGNIFICANT (1 INCH OR GREATER) CROSS SECTION OF RIPRAP PROFILE ALONG CENTERLINE OF
AUGUST 15 THROUGH DECEMBER 15 (WITH APPROVAL OF RAIN FALL EVENT REPAIR IMMEDIATELY. 2. WHEN OVERLAPPING BLANKETS, A MINIMUM OVERLAP OF 3 SPILLWAY AT CONTROL SECTION RIPRAP SPILLWAY
ENGINEER): BONDED FIBER MATRIX (OPTION FOR SLOPES): INCHES ON THE ADJACENT ROLL ALONG THE SLOPE, AND A
1. RYE (GRAIN): 120 LBS/AC 1. APPLY IN 2-STEP PROCESS AS FOLLOWS: 2. GOOD CONTACT WITH THE GROUND MUST BE MAINTAINED, AND MINIMUM OF 1 FOOT PERPENDICULAR TO THE SLOPE (ALONG LEGEND
FIRST PASS- INCLUDE ALL SEED, ALL AMMENDMENTS, AND 1/3 EROSION MUST NOT OCCUR BENEATH THE BLANKET. THE CONTOURS).
MULCHING: OF MULCH b = BOTTOM WIDTH OF EARTH SPILLWAY AT THE CONTROL SECTION, IN FEET.
IMMEDIATELY PROTECT SEEDED AREAS AGAINST EROSION BY SECOND PASS - INCLUDE 2/3 OF MULCH AND APPLY IN 3. ANY AREAS OF THE BLANKET THAT ARE DAMAGED OR NOT IN 3. BLANKET SHOULD BE STABLED USING A 3 FOOT S - FLATTEST SLOPE (S), IN %, ALLOWABLE FOR CHANNEL BELOW CONTROL SECTION.
MULCHING OR PLACING EROSION CONTROL MATTING. OPPOSING DIRECTION OF FIRST PASS IF APPLIED BY TOWER CLOSE CONTACT WITH THE GROUND SHALL BE REPAIRED AND CENTER-TO-CENTER PATTERN. X - MINIMUM LENGTH OF CHANNEL BELOW CONTROL SECTION, IN FEET.
USE EROSION CONTROL MATTING OR BONDED FIBER MATRIX WHERE 2. SEE SECTION 02485 FOR ADDITIONAL INFORMATION STAPLED. z - SIDE SLOPE RATIO.
REQUIRED ON DRAWINGS OR IN SPECIFICATIONS. 4. STAPLES SHOULD BE 11 GAUGE, AT LEAST 6 INCHES LENGTH BY A
STRAW MULCH: TURF REINFORCEMENT MAT: 4. IF EROSION OCCURS DUE TO POORLY CONTROLLED DRAINAGE, 1 INCH WIDTH STAPLES OR 12 INCH MINIMUM LENGTH WOODEN MINIMUM
1. CLEAN, SEED FREE, THRESHED STRAW OF OATS, WHEAT, 1. ROLLED POLYPROPYLENE PRODUCT STABILIZED AGAINST UV THE PROBLEM SHALL BE FIXED AND THE ERODED AREA STAKES, OR APPROVED EQUAL. STAPLES SHALL BE DRIVEN RIPRAP
SEDIMENT WIDTH RIPRAP LAYER RIPRAP
BARLEY, RYE, OR OTHER LOCALLY AVAILABLE AND CHEMICAL DEGRADATION. PROTECTED. SUCH THAT THE TOP OF THE STAPLE IS FLUSH WITH THE INVERT D50 S (%) X (FT) z
MULCH MATERIAL. 2. ALLOWABLE SHEAR STRESS: 7 PSF MINIMUM GROUND SURFACE. BASIN ID ((j) THICKNESS (IN.) (IN ) DMAX (IN.)
2. SPREAD MULCH IN A CONTINUOUS BLANKET USING 2 3. ALLOWABLE FLOW VELOCITY: 7 FPS MINIMUM 5. MONITOR AND REPAIR THE BLANKET AS NECESSARY UNTIL
TONS/ACRE TO A DEPTH OF 4 TO 5 STRAWS. 4. LONGEVITY: PERMANENT GROUND COVER IS ESTABLISHED. 1 25 326.5 18 8 12 2% 7.5 3
SEEDING SCHEDULEKO'34 EROSION CONTROL BLANKET 5 EMERGENCY SPILLWAY
�-02 NOT TO SCALE �-O NOT TO SCALE OOG-02 NOT TO SCALE
PROJECT MANAGER J. MURRAY, PE Harnett L L SITE DETAILS (3 OF 4)
A. MCGREW, PE
PROJECT ENGINEER . ii COUNT Y
HDR Engineering, Inc. of the Carolinas DRAWN BY A. MCGREW, PE I,/
//LK-
N.C.B.E.L.S. License Number: F-0116 NORTH C A R O LI N A
r; strong roots • new growth
555 Fayetteville Street, Suite 900
D 05/2024 ISSUED FOR STORMWATER PERMIT APPLICATION _ 040654 HARN ETT COUNTY
Raleigh, NC 27601 C 05/2024 ISSUED FOR BIDDING �CING��,
919.232.6600 B 01/2023 REVISED BASED ON REVIEWER COMMENTS r�i'c�i •'' � 0 T. 2" FILENAME OOC-06.dwg SHEET
%,�ys. e� �,. NORTHWEST CONVENIENCE CENTER OOC-04
A 10/2022 ISSUED FOR PERMITTING ���t I) S SHOWN
ISSUE DATE DESCRIPTION PROJECT NUMBER 10354679 � b HARNETT COUNTY NORTH CAROLINA SCALE