HomeMy WebLinkAbout011 C102.pdfCOMPACTED
SOIL
SLOPES:
2:1 MAX.
f hill 1111 ` I IT I I 'I II '' I i1-III-JI I I I I h.
CROSS SECTION VIEV'111
NOTE: STABILIZE DIVERSION DITCH WITH TEMPORARY SEEDING AND EROSION CONTROL NETTING
POSITIVE GRADE MUST BE PROVIDED TO ASSURE DRAINAGE.
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 DIME IS NOT LOWER AT ANY POINT THAN THE DESIGN ELEVATION PLUS THE
SPECIFIED SETTLEMENT.
4. PROVIDE SUFFICIENT ROOMAROUND 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.
TEMPORARY DIVERSION DETAIL
NOT TO SCALE
COMPACTED
SO
IL
ST
EEP CUT OR
FILL SLOPE
., � Its .. ._ : • . _... • .. . ... .: :.:....�. ..:�..; ; ,.�-, �, . ,--=�, � r-q
NZ 2:1 SLOPE OR
FLATTER
CROSS SECTION VIEW
NOTE:
STABILIZE DIVERSION DITCH WITH TEMPORARY SEEDING AND EROSION CONTROL NETTING. POSITIVE
GRADE MUST BE PROVIDED TO ASSURE DRAINAGE. WHERE DIVERSION WILL EXPERIENCE HIGH FLOWS
OR VELOCITIES, STABILIZE WITH PERMANENT EROSION CONTROL BLANKET OR RIP RAP.
CONSTRUCTION SPECIFICATIONS
1. REMOVE AND PROPERLY DISPOSE OF ALL TREES, BRUSH, STUMPS, AND OTHER OBJECTIONABLE MATERIAL.
FILL AND COMPACT ALL DITCHES, SWALES, OR GULLIES THAT WILL BE CROSSED TO NATURAL GROUND LEVEL
OR ABOVE.
2. MUST BEFORE PLACEMENT OF FILL, THE BASE OF THE RIDGE SHOULD BE DISKED BY MACHINERY.
3. EXCAVATE, 'SHAPE, AND STABILIZE THE DIVERSION TO LINE, GRADE, AND CROSS SECTION, AS REQUIRED IN
THE DESIGN PLAN.
4. COMPACT THE RIDGE TO PREVENT UNEQUAL SETTLEMENT, AND TO PROVIDE STABILITY AGAINST SEEPAGE.
5. VEGETATIVELY STABILIZE THE DIVERSION AFTER ITS INSTALLATION.
MAINTENANCE
INSPECT PERMANENT DIVERSIONS AFTER EVERY RAINFALL DURING THE CONSTRUCTION OPERATION..
IMMEDIATELY REMOVE ANY OBSTRUCTIONS FROM THE FLOW AREA, AND REPAIR THE DIVERSION RIDGE. CHECK
OUTLETS AND MAKE TIMELY REPAIRS AS NEEDED, MAINTAIN THE VEGETATION IN A VIGOROUS, HEALTHY
CONDITION AT ALL TIMES.
PERMANENT DIVERSION DETAIL
NOT TO SCALE
PERSPECTIVE VIEW
CLASS B RIPRAP (SEE SECTION THRU BASIN BELOW) -
SEDIMENT STORAGE
AREAS TO BE DISTURBED
(CUT,FILL,ETC.) FLOOD STORAGE ZONE
1'
-RIP RAP HEADWALL
INVERT PIPE
57 WASHED STONE, >' THICK x 3' HIGH MIN.
SEDIMENT STORAGE AREA
PIPE INVERT
RIPRAP" HEADWALL
+'-'GROUND
BAFFLE (TYP.)
SEDIMENT PIT
EARTH EMBARKMENT
1
INLET ZONE
35% OF SURFACE AREA
FIRST CHAMBER
LASS I RIPRAP OUTLET SHOWN. SEE C 25% OF SURFACE AREA
PLAN FOR ACTUAL OUTLET TYPE,
SECOND CHAMB
STAKE TO 25 OF SURFACEE AREA
SUPPORT WORE
OUTLET ZONE
15% OF SURFACE AREA
SUPPORT POST, 24"
INTO BOTTOM OR SIDE
ELAN VIEW
SUPPORT ROPE TO WIRE
COIR MESH OR SIMILIAR, � TO PREVENT SAGGING
STAPLED OR TRENCHED INTO BOTTOM OR SIDE CONSTRUCTION SPECIFICATIONS
I
1, GRADE THEAND S BASIN SO THAT THE BOTTOM IS LEVEL. FRONT TO BACK DE TO SIDE -
BAFFLE 2. INSTALL POSTS OR SAW HORSES ACROSS THE WIDTH OF THE SEDIMENT TRAP.
3. STEEL POSTS SHOULD BE DRIVEN TO A DEPTH OF 24 INCHES; SPACED A MAXIMUM OF 4 FEET APART, AND
THAN
INSTALLED THE SIDES OF THE BASIN AS WELL. THE TOP OF THE FABRIC SHOULD BE 6 INCHES HIGHER
MAINTENANCE LLED UP
INCHES LOWER THAN TOP OF THE BERMS..
THE INVERT OF THE SPILLWAY. TOPS OF BAFFLES SHOULD BE 2 INC L THE 0
SPECT BAFFLES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL, MAKE ANY
REQUIRED REPAIRS IMMEDIATELY. 4. INSTALL AT LEAST THREE ROWS OF BAFFLES BETWEEN THE INLET AND OUTLET DISCHARGE POINT. BASINS LESS
THAN 20 FEET IN LENGTH MAY USE 2 BAFFLES.
BE SURE TO MAINTAIN ACCESS TO THE BAFFLES. SHOULD THE FABRIC OF A BAFFLE
COLLAPSE, TEAR, DECOMPOSE, OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY. 5. WHEN USING POSTS, ADD A SUPPORT WIRE OR ROPE ACROSS THE TOP OF THE MEASURE TO PREVENT SAGGING.
REMOVE SEDIMENT DEPOSITS WHEN IT REACHES HALF FULL, TO PROVIDE ADEQUATE 6. WRAP' POROUS MATERIAL, LIKE JUTE BACKED BY COIR MATERIAL, OVER A 'SAWHORSE OR THE TOP WIRE.
STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE BAFFLES. HAMMER REPAR INTO THE SAWHORSE LEGS FOR ANCHORING. THE FABRIC SHOULD HAVE FIVE TO TEN PERCENT
TAKE CARE TO AVOID DAMAGING THE BAFFLES DURING CLEANOUT. SEDIMENT DEPTH OPENINGS IN THE WEAVE, ATTACH FABRIC TO A ROPE AND A SUPPORT STRUCTURE WITH ZIP TIES, WIRE, OR
SHOULD NEVER EXCEED HALF THE DESIGNED STORAGE DEPTH, STAPLES.
AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED, REMOVE 7. THE BOTTOM AND SIDES OF THE FABRIC SHOULD BE ANCHORED IN A TRENCH OR PINNED WITH 8-INCH EROSION
ALL BAFFLE MATERIALS AND UNSTABLE SEDIMENT DEPOSITS; BRING THE AREA TO CONTROL MATTING STAPLES.
GRADE, AND STABILIZE IT..
8. DO NOT SPLICE THE FABRIC, BUT USE A CONTINUOUS PIECE ACROSS THE BASIN.
BAFFLES INSIDE SEDIMENT BASIN DETAIL
` I CLASS B RIPRAP
#7 WASHED STONE
MAX. SEDIMENT DEPTH (CLEAN OUT POINT)
NOTES:
1. DIMENSIONS ARE MINIMUN ACCEPTABLE UNLESS OTHERWISE NOTED.
2. CRAVED & RIP RAP FILTER BERM BASIN DETAIL IS DESIGNED TO PROTECT
EXISTING PIPE IN D INVERTS THAT RAIN 10 ACRES OR LESS.
CONSTRUCTION SPECIFICATIONS
AREA R1 THAT MIGHT HINDER EXCAVATION AND DISPOSAL OF SPOIL.
1. CLEAR THE OF ALL DEBRIS
2. INSTALL THE CLASS B OR CLASS I RIPRAP IN A SEMI -CIRCLE AROUND THE PIPE INLET. THE STONE SHOULD BE BUILT UP HIGHER ON EACH END
WHERE IT TIES INTO THE EMBANKMENT. THE MINIMUM CREST WIDTH OF THE RIPRAP SHOULD BE 3 FEET, WITH A MINIMUM BOTTOM WIDTH OF 11 FEET. THE
MINIMUM HEIGHT SHOULD BE 2 FEET, BUT ALSO 1 FOOT LOWER THAN THE SHOULDER OF THE EMBANKMENT OR DIVERSIONS.
F
R STONE E PLACED ON THE OUTSIDE SLOPE OF
THE RIPRAP..
3. A 1 FOOT THICK LAYER OF NC DOT ;�5 O ;�57 S NE SHOULD B
4. THE SEDIMENT STORAGE AREA SHOULD BE EXCAVATED AROUND THE OUTSIDE OF THE STONE HORSESHOE 18 INCHES BELOW NATURAL GRADE,
IN ELEVATIONS, COMPACT AREA
E FILL DEPRESSION N ESTABLISH FINAL GRADING L
. WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED L AND ,
5 ,
PROPERLY, AND STABILIZE WITH GROUND COVER.
MAINTENANCE::
INSPECT ROCK PIPE INLET PROTECTION AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (% INCH OR GREATER) RAINFALL EVENT AND REPAIR
HAS ACCUMULATED T
T IT ORIGINAL DIMENSIONS WHEN THE SEDIMENTS O
IMMEDIATELY. REMOVE ENT AND RESTORE. THE SEDIMENT STORAGE AREA O S OR G
R SEDIM
I DESIGNATED DISPOSAL AREA
AND REPLACE THE
I F THE TRAP. PLACE THE SEDIMENT THAT IS REMOVED IN THE DES G D
ONE-HALF THE DESIGN DEPTH O PLC SED E
CONTAMINATED PART OF THE GRAVEL FACING.
CHECK THE STRUCTURE FOR DAMAGE. ANY RIPRAP DISPLACED FROM THE STONE HORSESHOE MUST BE REPLACED IMMEDIATELY.
AFTER ALL THE SEDIMENT -PRODUCING AREAS HAVE BEEN PERMANENTLY STABILIZED, REMOVE THE STRUCTURE AND ALL THE UNSTABLE SEDIMENT.
A STABILIZATION).
SMOOTH THE AREA TO BLEND WITH THE ADJOINING AREAS AND PROVIDE PERMANENT GROUND COVER (SURFACE )
TEMPORARY ROCK PIPE INLET PROTECTION DETAIL
NOT TO SCALE
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LENGTH TO
WIDTHMAX
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SURFACE
AREA
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a
DIEWATERING
ZONE
FILTER FAi
+
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1' FREEB,
6" MAX. DEPTH OF FLOW'
OVER EMERGENCY" :SPILLWAY-
Z=5' MAX. MIN. V
SEDIMENT H=2' MIN.
STORAGE ZONE-/
CROSS-SECTION VIEW
N.T.S.
1. REFER TO NCESCPDM
IKMENT SECTION • •-
ADD111ONAL DESIGN
SPECIFICATIONS
REGARDING
SEDIMENT
2. INSTALL FAIRCLOTH
SKIMMER OR R.
EQUALPER
REQUIREMENTSMANUFACTURES
w
INSTALLATION DETAILS.
REFER DETAILS
r
INSTALLATION.
W=5' MIN,
EMBANKMENT
T-1. ' MIN.
SPILLWAY
F - `
ANTI SEEP
COLLAR
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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.
TEXT) FABRICS IMPROVE STABILITY FOUNDATION IN LOCATIONS SUBJECT TO SEEPAGE OR HIGH WATER
4. USE GEC LE ABR CS BECAUSE THEY BILITY 17F THE FOU D ON
TABLE.
MAINTENANCE
MAINTAIN THE GRAVEL PAD IN A CONDITION TO PREVENT MUD OR SEDIMENT FROM LEAVING THE CONSTRUCTION SITE, THIS MAY
REQUIRE PERIODIC TOPORESSING WITH 2-INCH STONE. AFTER EACH RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP SEDIMENT
AND CLEAN IT OUT AS NECESSARY. IMMEDIATELY REMOVE ALL OBJECTIONABLE MATERIALS SPILLED, WASHED, OR TRACKED ONTO
PUBLIC ROADWAYS.
TEMPORARY GRAVEL CONSTRUCTION ENTRANCEDETAI L
NOT TO SCALE
CROSS SECTION VIEW
NOTES:
1. DIMENSIONS ARE MINIMUN ACCEPTABLE UNLESS OTHERWISE NOTED.
CONSTRUCTION PE IFIC TI N
1. CLEAR THE AREA OF ALL DEBRIS THAT MIGHT HINDER EXCAVATION AND DISPOSAL OF SPOIL. PLAIN VIEW
2. GRADE SHALLOW DEPRESSION UNIFORMLY TOWARDS THE INLET WITH SIDE SLOPES NO GREATER THAN 2:1. GRADE A 1-FOOT WIDE LEVEL AREA SET
INCHES BELOW THE AREA -ADJACENT TO THE INLET.
WI' OF THE RIPRAP SHOULD BE 18 INCHES
3. INSTALL THE CLASS B OR CLASS I RIPRAP IN A CIRCLE AROUND THE INLET. THE MINIMUM CREST WIDTH , WITH
A MINIMUM BOTTOM WIDTH OF 7.5 FEET. THE MINIMUM HEIGHT OF THE STONE IS 2 FEET.
4. THE OUTSIDE FACE OF THE RIPRAP IS THEN LINED WITH 12 INCHES OF NC DOT #5 OR #57 WASHED STONE..
MAINTENANCE:
INSPECT ROCK DOUGHNUT INLET PROTECTION AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (% INCH OR GREATER) RAINFALL EVENT AND REPAIR
IMMEDIATELY.
TO PROVIDE SATISFACTORY INLET PROTECTION EFFICIENCY, REMOVE SEDIMENT FROM THE SEDIMENT POOL AREA WHEN THE VOLUME IS DECREASED BY
HALF. THIS WILL HELP PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN. STABILIZE EXCAVATED MATERIAL APPROPRIATELY.
TAKE CARE NOT TO DAMAGE OR UNDERCUT THE STRUCTURE DURING SEDIMENT REMOVAL. REMOVE DEBRIS FROM THE INLET AND REPLACE STONE AS
NEEDED. IF THE INLET WAS COVERED WITH WIRE MESH THE MESH SHOULD BE CLEANED OF DEBRIS.
WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN ADEQUATELY STABILIZED, REMOVE ALL MATERIALS AND DISPOSE' OF SEDIMENT PROPERLY. BRING THE
DISTURBED AREA TO THE GRADE OF THE DROP INLET. SMOOTH AND COMPACT IT AS NEEDED.
APPROPRIATELY STABILIZE ALL BARE AREAS AROUND THE INLET WITH GROUND COVER.
TEMPORARY ROCK DOUGHNUT INLET PROTECTION DETAIL
NOT TO SCALE
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CONSUL TING ,7 �& .
4124 WANDERING LN. N.E.
HICKORY, NC 28601
STEEL POST 8` MAX. STANDARD STRENGTH FABRIC WITH WIRE FENCE
6' MAX, EXTRA STRENGTH FABRIC WITHOUT WIRE FENCE
Noma
WIRE FENCE
PLASTIC OR FILTER FABRIC
WIRE TIES STEEL POST BACKFILL TRENCH AND
18-24"
COMPACT THOROUGHLY
WIRE FENCE
NATURAL GROUND NATURAL GROUND
4' MIN
c�00■
24}„ FILTER FABRIC
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FRONT VIEW SIDE. VIEW
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CONSTRUCTION SPECIFICATIONS
MATERIALS
T REQUIREMENTS
HT T W�IiICH IS CERTIFIED BY THE MANUFACTURER OR SUPPLIER AS CONFORMING O THE
1. USE A SYNTHETIC FILTER FABRIC OF AT LEAST �5� BY WEIGHT OF I OLYOLEFkNS OR POLYESTER,
IN ASTM O 6461.
SYNTHETC rT TER FABRIC SHOULD CONTAIN ULTRAVIOLET RAY INHIBITORS AND STABILIZERS TO PROVIDE A MINIMUM OF 6 MONTHS
NTHS OF EXPECTED USABLE CONSTRUCTION LIFE AT A TEMP
ERATURE
RANGE OF 0 TO 120' F..
T I
T FEE AK SURE THAT STEEL POSTS HAVE PROJECTIONS TO FACILITATE FASTENING THE co
2. ENSURE THAT POSTS FOR SEDIMENT FENCES ARE 1;33 LBfLINEAR FT STEEL W�sli A MINIMUM LENGTH OF 5 T, MAKE S R S
FABRIC.
INCHES.'.
14 E AN A MAXIMUM MESH SPACING OF 6
3. FOR REINFORCEMENT OF STANDARD STRENGTH FILTER FABRIC USE WIRE FENCE NTH A MINIMUM GAUD D MU
CONSTRUCTION
1. CONSTRUCT THE SEDIMENT BARRIER OF .STANDARD STRENGTH OR EXTRA STRENGTH: SYNTHETIC FILTER FABRICS.
n
o
T_
T FA FENCES MAY IMPOUND VOLUMES OF WATER SUFFICIENT TO CAUSE
2. ENSURE THAT THE HEIGHT OF THE SEDIMENT FENCE DOES NOT EXCEED 24 INCHES ABOVE THE GROUND SURFACE. HIGHER �- U
FAILURE OF THE STRUCTURE.)
3 CONSTRUCT THE FILTER FABRIC FROM A CONTINUOUS ROLL CUT TO THE LENGTH OF THE BARRIER TO AVOID JO
INTS, WHEN JOINTS ARE NECESSARY, SECURELY FASTEN THE FILTE
R CLOTH ONLYAT
A SUPPORT POST WITH 4 FEET MINIMUM OVERLAP TO THE NEXT POST.
P M F TRENCH. Y T THE E SIDE OF THE POST,.t, EXTEND THE WIRE .MESH SUPPORT TO THE BOTTOM O THE C
4. SUPPORT STANDARD STRENGTH FILTER FABRIC Y WIRE MESH FASTENED SECURELY O H _ UPSLOPE L B B
FASTEN THE WIRE 06REINFORCEMENT; THEN FABRIC ON THE UPSLOPE SIDE OF THE FENCE POST. WIRE OR PLASTIC ZIP TIES SHOULD HAVE MINIMUM 50 POUND TENSILE STRENGTH. c
N SECURELY INTO E GROUND A MINIMUM OF 24 INCHES.
I PART T POST SHOULD E RIVE.. SEC EL O THE D 1
WIRE MESH T FENCE S U A MAXIMUM OF 8 FEET A SUPPORT S B D 5. WHEN A ES SUPPORT USED, SPACE .POSTS
1
&. EXTRA STRENGTH FILTER FABRIC WITH 6 FEET PAST SPACING DOES NOT :REQUIRE '+,!WRE MESH SUPPORT FENCE. SECURELY FASTEN THE FILTER FABRIC DIRECTLY TO POSTS, WIRE ORPLASTIC ZIP
TIESSHOULD HAVE MINIM POUND TENSILE SIRE S O LD UM 50 NGTH,
7. EXCAVATE A TRENCH APPROXIMATELY 4 INCHES WIDE AND 8 INCHES DEEP ALONG THE PROPOSED LINE OF POSTS AND UPSLOPE FROM THE BARRIER.
8. PLACE 12 INCHES OF THE FABRIC ALONG THE BOTTOM AND 'SIDE OF THE TRENCH.
T FENCE PERFORMANCE. i I OVER RI 1' THOROUGH COMPACTION . OF THE BACKFI L IS CRITICAL TO SIL F
4. BACKFILL THE TRENCH WITH SOIL PLACED O THE FILTER FABRIC AND COMPACT. OUGL
10. DO NOT ATTACH FILTER FABRIC TO EXISTING TREES:
PROJECT PHASE:
MAINTENANCE..
SEDIMENT FENCES AT LEAST ONCE A WEEK AN AFTER EACH RAINFALL MAKE ANY REQUIRED REPAIRS IMMEDIATELY.Drawings
INSPECT S_ D F D
SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR DECOMPOSE OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY. I pw !7rlcc
r� K CAR TO UNDERMINING FENCE DATE;
N RAIN SURE ON E FENCE. TAKE E AVOID U NG THE F THE NEXT A N AND TO REDUCE PEE,. TH REMOVE SEDIMENT DEPOSIT S NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME OR SA C
DURING CLEANOUT. '"Ew
4
AREA HA BEEN PROP ABLY STABILIZED.
b
A D FIE. THE CONTRIBUTING DRAINAGE S F AND UN T DEPOSITS A RING THE AREA . TO GRADE AN STABILIZE IT A REMOVE ALL FENCING.. MATERIALS STABLE SEDIMENT D SI S AND B
,
SILT FENCE DETAIL
E E T NUIweER.
NOT TO SCALE co