SW3220902_Plansheet - Misc. Detail_20220921 (2)

PVC END
CAP \
PVC TEE
PVC ELBOW
PVCAEPN D
PVC PIPE
1/2" HOLES IN
UNDERSIDE
END VIEW
DESIGN CRITERIA
SUMMARY: SKIMMER SEDIMENT BASIN
WATER SURFACE
SCHEDULE 40
PVC PIPE
FLEXIBLE
HOSE
PVC VENT
PIPE
FRONT VIEW
SCHEDULE 40
PVC PIPE
/ ~ORIFICE
PLATE
PVC TEE
BOTTOM SURFACE
RIP -RAP PAD
REQUIRED
UNDER SKIMMER
COIR BAFFLES CONSTRUCTION SPECIFICATIONS
1. 1. GRADE THE BASIN SO THAT THE BOTTOM IS LEVEL FRONT TO BACK
AND SIDE TO SIDE.
"C" ENCLOSURE 2, 2. INSTALL THE COIR FIBER BAFFLES IMMEDIATELY UPON EXCAVATION
OF THE BASINS.
3. 3. INSTALL POSTS ACROSS THE WIDTH OF THE SEDIMENT TRAP
WATER ENTRY (PRACTICE 6.62, SEDIMENT FENCE).
UNIT
4. 4. STEEL POSTS SHOULD BE DRIVEN TO A DEPTH OF 24 INCHES AND
SKIMMER SPACED A MAXIMUM OF 4 FEET APART. THE TOP OF THE FABRIC
NOTE: SKIMMER TO BE TETHERED SHOULD BE A MINIMUM OF 6 INCHES HIGHER THAN THE INVERT OF THE
PRIMARY SPILLWAY:
TRAPEZOIDAL SPILLWAY WITH IMPERMEABLE MEMBRANE
MAXIMUM DRAINAGE AREA
10 ACRES
MINIMUM VOLUME:
1800 CUBIC FEET PER ACRE OF DISTURBED AREA
MINIMUM SURFACE AREA:
325 SQUARE FEET PER CFS OF 025PEAK INFLOW
MINiMLIM L/W RATI 07
2:1
MAXIMUM UW RATIO:
6:1 BAFFLE (TYP.)
MINIMUM DEPTH:
2 FEET
DEWATERING MECHANISM-
SKIMMER
MINIMUM RING TIME;2
DAYS
DESIGN BASINASIN Lim
3 YEARS OR LESS
DAM HEIGHT.-
5 FEET MAXIMUM
/
BAFFLES REQUIRED-
3 BAFFLES
SEE NC EROSION AND SEDIMENT CONTROL
PLANNING AND DESIGN MANUAL.
NOTE: BASINS LESS THAN 20' IN LENGTH MAY
USE 2 BAFFLES.
STONE W/FABRIC
<_� G,4
�ERGEN
SKIMMER
SPILLWAY. TOPS OF BAFFLES SHOULD BE A MINIMUM OF 2 INCHES
LOWER THAN THE TOP OF THE EARTHEN EMBANKMENT.
PERSPECTIVE VIEW 5. 5. INSTALL AT LEAST THREE ROWS OF BAFFLES BETWEEN THE INLET
�F ¢ iAND OUTLET DISCHARGE POINT: BASINS LESS THAN 20 FEET IN
LENGTH MAY USE 2 BAFFLES.
6. 6. ATTACH A 9 GAUGE HIGH TENSION WIRE STRAND TO THE STEEL
TETHER
STONE ENERGY
DISSIPATOR
NOTES:
1. LOCATE SEDIMENT INFLOW TO THE BASIN AWAY
FROM THE DAM TO PREVENT SHORT CIRCUITS
FROM INLETS TO OUTLETS.
2. BASIN MUST BE STABILIZED IMMEDIATELY
UPON CONSTRUCTION AND PRIOR TO SITE
INSPECTION APPROVAL,
SKIMMER SEDIMENT BASIN
/
POSTS AT A HEIGHT OF 6 INCHES ABOVE THE SPILLWAY ELEVATION
WITH PLASTIC TIES OR WIRE FASTENERS TO PREVENT SAGGING. IF
THE TEMPORARY SEDIMENT BASIN WILL BE CONVERTED TO A
STABLE TRANSITION
PERMANENT STORMWATER BASIN OF A GREATER DEPTH, THE BAFFLE
REgUIRED TO THE
HEIGHT SHOULD BE BASED ON THE POOL DEPTH DURING USE AS A
BASE OF THE SLOPE
TEMPORARY SEDIMENT BASIN.
7.
EXTEND 9 GAUGE MINIMUM HIGH TENSION WIRE STRAND TO SIDE OF
BASIN OR INSTALL STEEL T-POSTS TO ANCHOR BAFFLE TO SIDE OF
BASIN AND SECURE TO VERTICAL END POSTS AS SHOWN IN FIGURE
6:65B.
INLET ZONE 25%
OF SURFACE AREA
g
DRAPE THE COIR FIBER MAT OVER THE WIRE STRAND MOUNTED AT A
HEIGHT OF 6 INCHES ABOVE THE SPILLWAY ELEVATION, SECURE THE
COIR FIBER MAT TO THE WIRE STRAND WITH PLASTIC TIES OR WIRE
FIRST CHAMBER
25% OF SURFACE AREA
FASTENERS. ANCHOR THE MATTING TO THE SIDES AND FLOOR OF THE
BASIN WITH 12 INCH WIRE STAPLES, APPROXIMATELY 1 FT APART,
SECOND CHAMBER
ALONG THE BOTTOM AND SIDE SLOPES OF THE BASIN.
25% OF SURFACE AREA
9.
D❑ NOT SPLICE THE FABRIC, BUT USE A CONTINUOUS PIECE ACROSS
THE BASIN
EXTEND BAFFLES UP AS
TO NOT ALLOW FLOW AIROUND
10.
ADJUSTMENTS MAY BE REQUIRED IN THE STAPLING REQUIREMENTS
\ THE ENDS:
TO FIT INDIVIDUAL SITE CONDITIONS.
OUTLET ZONE 25%4 OF SURFACE AREA
SUPPORT ROPE
TO WIRE TO
PREVENT SAGGING
4'MAX
DESIGN LIFE OF FABRIC
IS 6-12 MONTHS
BAFFLE DETAIL
SUPPORT POST
24" INTO BOTTOM
OR SIDES
STAKE TO
SUPPORT WIRE -�
3' MIN
COIR M E$H OR JUTE, TRENCHED
INTO BOTTOM AND SIDE
CONSTRUCTION SPECIFICATIONS
1. CLEAR, GRUB, AND STRIP THE AREA UNDER THE EMBANKMENT OF ALL VEGETATION AND RUU I MAT. REMOVE ALL SURFACE SOIL
P HIGH AMOUNTS OF MATTER AND OR OF IT ALL CONTAINING ORGANIC STOCKPILE DISPOSE PROPERLY: HAUL OBJECTIONABLE
MATERIAL TO THE DESIGNATED DISPOSAL AREA. PLACE TEMPORARY SEDIMENT CONTROL MEASURES BELOW BASIN AS NEEDED
2. ENSURE THAT FILL MATERIAL FOR THE EMBANKMENT IS FREE OF ROOTS, WOODY VEGETATION, ORGANIC MATTER, AND OTHER
OBJECTIONABLE MATERIAL. PLACE THE FILL IN LIFTS NOT TO EXCEED 9 INCHES, AND MACHINE COMPACT IT. OVER FILL THE
EMBANKMENT 6 INCHES TO ALLOW FOR SETTLEMENT,
3. SHAPE THE BASIN TO THE SPECIFIED DIMENSIONS. PREVENT THE SKIMMING DEVICE FROM SETTLING INTO THE MUD BY
EXCAVATING A SHALLOW PIT UNDER THE SKIMMER OR PROVIDING A LOW SUPPORT UNDER THE SKIMMER OF STONE OR TIMBER.
4. PLACE THE BARREL (TYPICALLY 4-INCH SCHEDULE 40 PVC PIPE) ON A FIRM, SMOOTH FOUNDATION OF IMPERVIOUS SOIL. DO NOT
USE PERVIOUS MATERIAL SUCH AS SAND, GRAVEL, OR CRUSHED STONE AS BACKFILL AROUND THE PIPE. PLACE THE FILL
MATERIAL AROUND THE PIPE SPILLWAY IN 4-INCH LAYERS AND COMPACT IT UNDER AND AROUND THE PIPE TO AT LEAST THE
SAME DENSITY AS THE ADJACENT EMBANKMENT. CARE MUST BE TAKEN NOT TO RAISE THE PIPE FROM THE FIRM CONTACT WITH
ITS FOUNDATION WHEN COMPACTING UNDER THE PIPE HAUNCHES.
PLACE A MINIMUM DEPTH OF 2 FEET OF COMPACTED BACKFILL OVER THE PIPE SPILLWAY BEFORE CROSSING IT WITH
CONSTRUCTION EQUIPMENT. IN NO CASE SHOULD THE PIPE CONDUIT BE INSTALLED BY CUTTING A TRENCH THROUGH THE DAM
AFTER THE EMBANKMENT IS COMPLETE.
5. ASSEMBLE THE SKIMMER FOLLOWING THE MANUFACTURERS INSTRUCTIONS, OR AS DESIGNED.
6. LAY THE ASSEMBLED SKIMMER ON THE BOTTOM OF THE BASIN WITH THE FLEXIBLE JOINT AT THE INLET OF THE BARREL PIPE.
ATTACH THE FLEXIBLE JOINT TO THE BARREL PIPE AND POSITION THE SKIMMER OVER THE EXCAVATED PIT OR SUPPORT. BE
SURE TO ATTACH A ROPE TO THE SKIMMER AND ANCHOR IT TO THE SIDE OF THE BASIN, THIS WILL BE USED TO PULL THE
SKIMMER TO THE SIDE FOR MAINTENANCE.
7. EARTHEN SPILLWAYS --INSTALL THE SPILLWAY IN UNDISTURBED SOIL TO THE GREATEST EXTENT POSSIBLE. THE ACHIEVEMENT
OF PLANNED ELEVATIONS, GRADE, DESIGN WIDTH, AND ENTRANCE AND EXIT CHANNEL SLOPES ARE CRITICAL TO THE
SUCCESSFUL OPERATION OF THE SPILLWAY. THE SPILLWAY SHOULD BE LINED WITH LAMINATED PLASTIC OR IMPERMEABLE
GEOTEXTILE FABRIC_ THE FABRIC MUST BE WIDE AND LONG ENOUGH TO COVER THE BOTTOM AND SIDES AND EXTEND ONTO THE
TOP OF THE DAM FOR: ANCHORING IN A TRENCH. THE EDGES MAYBE SECURED WITH 8-INCH STAPLES OR PINS. THE FABRIC MUST
BE LONG ENOUGH TO EXTEND DOWN THE SLOPE AND EXIT ONTO STABLE GROUND. THE WIDTH OF THE FABRIC MUST BE ONE
PIECE, NOT JOINED OR SPLICED; OTHERWISE WATER CAN GET UNDER THE FABRIC. IF THE LENGTH OF THE FABRIC IS
INSUFFICIENT FOR THE ENTIRE LENGTH OF THE SPILLWAY, MULTIPLE SECTIONS, SPANNING THE COMPLETE WIDTH, MAY BE
USED. THE UPPER SECTION 5 SHOULD OVERLAP THE LOWER SECTION(S) SO THAT WATER CANNOT FLOW UNDER THE FABRIC.
SECURE THE UPPER EDGE AND SIDES OF THE FABRIC IN A TRENCH WITH STAPLES OR PINS. (ADAPTED FROM "A MANUAL FOR
DESIGNING, INSTALLING AND MAINTAINING SKIMMER SEDIMENT BASINS." FEBRUARY, 1999. J_ W. FAIRCLOTH & SCAN.).
8. INLETS --DISCHARGE WATER INTO THE BASIN IN A MANNER TO PREVENT EROSION, USE TEMPORARY SLOPE DRAINS OR
DIVERSIONS WITH OUTLET PROTECTION TO DIVERT SEDIMENT- LADEN WATER TO THE UPPER END OF THE POOL AREA TO
IMPROVE BASIN TRAP EFFICIENCY (REFERENCES: RUNOFF CONTROL MEASURES AND OUTLET PROTECTION).
9. EROSION CONTROL --CONSTRUCT THE STRUCTURE SO THAT THE DISTURBED AREA IS MINIMIZED. DIVERT SURFACE WATER AWAY
FROM BARE AREAS. COMPLETE THE EMBANKMENT BEFORE THE AREA IS CLEARED, STABILIZE THE EMERGENCY SPILLWAY
EMBANKMENT AND ALL OTHER DISTURBED AREAS ABOVE THE CREST OF THE PRINCIPAL SPILLWAY IMMEDIATELY AFTER
CONSTRUCTION (RFFFRFNCFS• SIIRFA(.F STARII 17A7I0N).
10. INSTALL POROUS BAFFLES AS SPECIFIED IN PRACTICE 6.65, POROUS BAFFLES.
11. AFTER ALL THE SEDIMENT -PRODUCING AREAS HAVE BEEN PERMANENTLY STABILIZED, REMOVE THE STRUCTURE AND ALL THE
UNSTABLE SEDIMENT. SMOOTH THE AREA TO BLEND WITH THE ADJOINING AREAS AND STABILIZE PROPERLY (REFERENCES-
SURFACE STABILIZATION).
3d
PIPE OUTLET TO FEAT AREA
WITH NO DEEINED CHANNEL
01011�y
1. La IS THE LENGTH OF THE RIP -RAP
APRON.
2. d = 1.5 TIMES THE MAXIMUM STONE
DIAMETER BUT NOT LESS TAN 6".
3. IN A WELL DEFINED CHANNEL
EX -TEND 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
La FABRIC MUST BE INSTALLED
BETWEEN THE RIP -RAP AND SOIL
d III III �)rff -mm _M mI FOUNDATION.
1 1 I I I 5. INSTALL PAD ON 0% GRADE
FILTER BLANKET
SECT. AA
OUTLET STABILIZATION STRUCTURE
NCDOT #5 OR #57
WASHED STONE
RT,S.
4' M AX
NCDOT #5 OR #57
WASHED STONE F%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 FEET BEYOND THE DITCH BANK
(FIGURE 8.83B) TO KEEP WATER FROM CUTTING AROUND THE
ENDS OF THE CHECK DAM.
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.
6.
MAKE SURE THAT THE CHANNEL REACH ABOVE THE MOST
UPSTREAM DAM IS STABLE.
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, 4 TO 7 IN STONE (TYP.)
12 IN MIN.
TOP OF BANK
FLOW
2, 7
ra
DEPTH 12 IN
OF APRON
12 IN
MIN. DITCH,D (TYP.)
Y=D/2
I 8 IN
5 20 1N
2 FTO MAX.
-� SUppE,
8 IN KEY IN NONWOVEN
GEOTEXTILE
GEOTEXTILE 6 IN
'
SPACING, X
APRON
(TYP.)
4 TO 7 IN STONE
NONWOVEN
CHANNEL PROFILE
GEOTEXTILE
CHECK DAM
2'
MAINTENANCE
NOTES:
MAINTENANCE
1.) TOTAL DRAINAGE AREA FLOWING TO SILT
-METAL FENCE POST INSPECT SEDIMENT FENCES AT LEAST
FENCE MAY NOT EXCEED 114 ACRE PER 100'
ONCE A WEEK AND AFTER EACH
OF FENCE. DRAINAGE AREAS MAY BE
14 GAUGE MINIMUM RAINFALL. MAKE ANY REPAIRS
INCREASED WITH A STORAGE PIT IN FRONT
HOGWIRE (OPTIONAL) IMMEDIATELY.
OF FENCE ANDIOR STONE OUTLETS.
SHOULD THE FABRIC OF A SEDIMENT
2.) MAXIMUM PLACEMENT OF POST USING
PROPEX FENCE COLLAPSE, YEAR, DECOMPOSE
HOG WIRE WITH APPROVED EROSION xQ
FABRIC WIWIRE BACKING OR BECOME INEFFECTIVE, REPLACE IT
CONTROL FABRICS TO BE 8'4% s, g
PROMPTLY.
3.) MAXIMUM PLACEMENT OF POST WITHOUT b
REMOVE SEDIMENT DEPOSITS AS
HOG WIRE WITH APPROVED EROSION N
ACKFILL WITH DIRT NECESSARY TO PROVIDE ADEQUATE
CONTROL FABRICS TO BE 6-0".STORAGE
VOLUME FOR THE NEXT RAIN
C) SKIRT AND WIRE OF FABRIC SHOULD BE
AND TO REDEUCE PRESSURE ON THE
TRENCHED 5" INTO GROUND AND co
FENCE.
BACKFILLED WI DIRT TO 6" ABOVE GROUNDFLOW
REMOVE ALL FENCING MATERIALS AND
io
= = UNSTABLE SEDIMENT DEPOSITS AND
==ITI=III1
--1 _ _, BRING THE AREA TO GRADE AND
6" STABILIZE IT AFTER THE CONTRIBUTING
o
DRAINAGE AREA HAS BEEN PROPERLY
N
STABILIZED.
19 GAUGE HARDWARE CLOTH
Y4 MESH OPENINGS
INSPECT INLETS AT LEAST WEEKLY AND AFTER
EACH SIGNIFICANT (/, INCH OR GREATER)
RAINFALL EVENT. CLEAR THE MESH WIRE OF ANY
DEBRIS OR OTHER OBJECTS TO PROVIDE
ADEQUATE FLOW FOR SUBSEQUENT RAINS. TAKE
CARE NOT TO DAMAGE OR UNDERCUT THE
WIRE MESH DURING SEDIMENT REMOVAL, REPLACE
STONE AS NEEDED.
STANDARD INLET PROTECTION
(HARDWARE CLOTH & GRAVEL)
NTS
z
� KEY IN
GEOTEXTILE 6 IN
IN LAYE2 R OF
WASHED AGGREGATE
CONSTRUCTION SPECIFICATIONS
1. REMOVE AND PROPERLY DISPOSE OF ALL TREES, BRUSH, STUMPS, AND OTHER
OBJECTIONABLE MATERIAL.
2. ENSURE THAT THE MINIMUM CONSTRUCTED CROSS SECTION MEETS ALL DESIGN REQUIREMENTS.
3. ENSURE THAT THE TOP OF THE DIKE IS NOT LOWER AT ANY POINT THAN THE DESIGN
ELEVATION PLUS THE SPECIFIED SETTLEMENT.
4. PROVIDE SUFFICIENT ROOM AROUND DIVERSIONS TO PERMIT MACHINE REGRADING AND
CLEANOUT.
5. VEGETATE THE RIDGE IMMEDIATELY AFTER CONSTRUCTION, UNLESS IT WILL REMAIN IN
PLACE LESS THAN 30 WORKING DAYS.
MAINTENANCE
INSPECT TEMPORARY DIVERSIONS ONCE A WEEK AND AFTER EVERY RAINFALL. IMMEDIATELY
REMOVE SEDIMENT FROM THE FLOW AREA AND REPAIR THE DIVERSION RIDGE. CAREFULLY
CHECK OUTLETS AND MAKE TIMELY REPAIRS AS NEEDED. WHEN THE AREA PROTECTED IS
PERMANENTLY STABILIZED, REMOVE THE RIDGE AND THE CHANNEL TO BLEND WITH THE NATURAL
GROUND LEVEL AND APPROPRIATE STABILIZE IT IMMEDIATELY.
AMERICAN EXCELSIOR COMPANY
2 CURLEXe NET FREE BLANKET
-MIN. (OR EQUIVALENT)
COMPACTED SOIL
24" MIN. FL°IN
-III III III III 6 TYPICIAL I I I III III III III _III III III I I
I
CLEAN WATER DIVERSION SWALE
N.T.S.
SILT FENCE
POST: METAL T-POST 5'4' OR 6'4' IN HEIGHT DEPENDING ON FILL
SLOPE (MIN, 1,33 LBILF STEEL CONSTRUCTION)
FABR10.3-0" IN WIDTH (MUST MEET STANDARD S-PECIFICATIONS
FOR SILT FENCE - A$TM D 6461).
SILT FENCE DETAIL
N.T.S.
a OL
d50=4"
4'
SILT FENCE W/ TEMP. ROCK OUTLET
•iTe
TYPICAL SWALE CROSS-SECTION:
SILT FENCE
CLASS 1 OR 2
RIP -RAP WITH
6 INCHES OF
WASHED STONE ON
STEEL POST UPSTREAM FACE 4' MAX.
WIRE FENCING
(IF APPLICABLE)
STEEL POST
i
CLASS 1 OR 2
WOVEN FILTER FABRIC ?� RIP -RAP 7 MIN_
WASHED STONE
NCDOT #5 OR #57)
- __
-III -ul
GENERAL NOTES: MAINTENANCE NOTES:
1. SEDIMENT FILTER OUTLET SHALL BE 16 INCHES HIGH BUT NO TALLER THAN 18 INCHES. 1, FILTER OUTLETS SHALL BE INSPECTED BY THE FINANCIALLY RESPONSIBLE PARTY OR
HIS AGENT IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING
2. CLASS 1 OR 2 RIP -RAP SHALL BE USED AND COVERED WITH 5 INCHES OF NCDOT #5 OR PROLONGED RAINFALL. ANY REPAIRS NEEDED SHALL BE MADE IMMEDIATELY.
#57 WASHED STONE ON THE UPSLOPE SIDE. 2. THE STONE SHALL BE REPLACED PROMPTLY AFTER ANY EVENT THAT HAS CLOGGED
3. POSTS SHALL BE NO MORE THAN 4 FEET APART. OR REMOVED IT.
4. SITE OUTLETS AT ANY POINT SMALL CONCENTRATED FLOWS ARE ANTICIPATED AND AT THE 3. SEDIMENT DEPOSITS SHOULD BE REMOVED WHEN DEPOSITS REACH HALF THE HEIGHT
DIRECTION OF THE INSPECTOR. OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT
FENCE OUTLET IS REMOVED SHALL BE DRESSED TO CONFORM TO THE EXISTING
5. ONE ACRE MAXIMUM DRAINAGE AREA PER OUTLET. GRADE, PREPARED AND SEEDED.
ROCK OUTLET FOR SILT FENCE
NTS
CONSTRUCTION SPECIFICATIONS
1. REMOVE AND PROPERLY DISPOSE OF ALL TREES, BRUSH, STUMPS, AND OTHER
OBJECTIONABLE MATERIAL.
2. ENSURE THAT THE MINIMUM CONSTRUCTED CROSS SECTION MEETS ALL DESIGN REQUIREMENTS.
3. ENSURE THAT THE TOP OF THE DIKE IS NOT LOWER AT ANY POINT THAN THE DESIGN
ELEVATION PLUS THE SPECIFIED SETTLEMENT.
4. PROVIDE SUFFICIENT ROOM AROUND DIVERSIONS TO PERMIT MACHINE REGRADING AND
CLEANOUT.
5. VEGETATE THE RIDGE IMMEDIATELY AFTER CONSTRUCTION, UNLESS IT WILL REMAIN IN
PLACE LESS THAN 30 WORKING DAYS.
MAINTENANCE
INSPECT TEMPORARY DIVERSIONS ONCE A WEEK AND AFTER EVERY RAINFALL, IMMEDIATELY
REMOVE SEDIMENT FROM THE FLOW AREA AND REPAIR THE DIVERSION RIDGE. CAREFULLY
CHECK OUTLETS AND MAKE TIMELY REPAIRS AS NEEDED. WHEN THE AREA PROTECTED IS
PERMANENTLY STABILIZED, REMOVE THE RIDGE AND THE CHANNEL TO BLEND WITH THE NATURAL
GROUND LEVEL AND APPROPRIATELY STABILIZE IT.
COMPACTED SCII
6' TYPICAL
DIVERSION SWALE
DIVERSION DIKE
HOLD-DOWN STAKES
_ 4' MIN _ ISLAND OVER INLET
15 MIN
INLET
10' SPACINGPLASTIC
coRRucATE� v
PIPE
41 x 4'W x 18" DEEP
CLASS "B" RIP RAP
STABILIZE 1�
OUTLET \ TOP OF 4' min
DI VERS ON T
NATURAL GROUND a
V MIN. 1.5' MIN
I�T ' a a a
_ 4' MIN DIVERSION CHANNEL
LEVEL
TEMPORARY SLOPE DRAIN
TOP OF
HAND -COMPACTED
FILL (ISLAND)
o.s' min
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DRAWN BY : JRA
CHECKED BY: AC
DATE: 08/05/2022
PROJECT NO.: 03003.003
REF. NO.: -
SCALE: NTS
H R
053670
SHEET
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