Appendix G-E&SC Plans

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EROSION AND SEDIMENT CONTROL PLANS
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SEDIMENT TRAP DESIGN SEDIMENT TRAP EFFICIENCY
TRAP NUMBER DRAINAGE AREA DRAINAGE AREA REQUIRED VOLUME (3600 DEPTH** (3.5 FT MIN.) WIDTH* LENGTH* VOLUME PROVIDED RUNOFF COEFFICIENT RAINFALL INTENSITY FLOW Q25 REQUIRED SURFACE AREA AREA PROVIDED WEIR LENGTH
CF/AC) (435 SF/CFS)
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ST-2 214803 4.93 17752 3.5 67 134 31423 0.5 8.15 20.09 8741 8978 12
ST-5 203866 4.68 16848 3.5 65 130 29575 0.5 8.15 19.07 8296 8450 12 w
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ST-12 216498 4.97 17892 3.5 67 134 31423 0.5 8.15 20.25 8810 8978 12
ST-13 217338 4.99 17962 3.5 67 134 31423 0.5 8.15 20.33 8844 8978 12
ST-15 177144 4.07 14640 3.5 61 122 26047 0.5 8.15 16.57 7209 7442 12
ST-16 183758 4.22 15187 3.5 62 124 26908 0.5 8.15 17.19 7478 7688 12
ST-20 218011 5.00 18017 3.5 67 134 31423 0.5 8.15 20.39 8872 8978 12
ST-22 198920 4.57 16440 3.5 64 128 28672 0.5 8.15 18.61 8095 8192 12
ST-23 61161 1.40 5055 3.5 36 72 9072 0.5 8.15 5.72 2489 2592 6 a a a a a
ST-26 182030 4.18 15044 3.5 61 122 26047 0.5 8.15 17.03 7408 7442 12
ST-28 70144 1.61 5797 3.5 38 76 10108 0.5 8.15 6.56 2854 2888 6
ST-30 211948 4.87 17516 3.5 66 132 30492 0.5 8.15 19.83 8625 8712 12
ST-36 169138 3.88 13978 3.5 59 118 24367 0.5 8.15 15.82 6883 6962 8
ST-37 71513 1.64 5910 3.5 39 78 10647 0.5 8.15 6.69 2910 3042 6
ST-40 109068 2.50 9014 3.5 48 96 16128 0.5 8.15 10.20 4438 4608 8
ST-42 157057 3.61 12980 3.5 57 114 22743 0.5 8.15 14.69 6391 6498 10
ST-45 176075 4.04 14552 3.5 60 120 25200 0.5 8.15 16.47 7165 7200 12
ST-47 56100 1.29 4644 3.5 34 68 8092 0.5 8.15 5.26 2287 2312 8 0
ST-48 121130 2.78 10008 3.5 50 100 17500 0.5 8.15 11.33 4928 5000 8 c\I
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ST-49 52643 1.21 4356 3.5 33 66 7623 0.5 8.15 4.93 2145 2178 8
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ST-51 177194 4.07 14644 3.5 61 122 26047 0.5 8.15 16.58 7211 7442 12 Lo
ST-52 161465 3.71 13344 3.5 58 116 23548 0.5 8.15 15.10 6571 6728 10 O H m
ST-54 196620 4.51 16250 3.5 64 128 28672 0.5 8.15 18.39 8001 8192 12 t �
ST-55 192524 4.42 15911 3.5 63 126 27783 0.5 8.15 18.01 7835 7938 12 J cr. w v �
ST-56 39585 0.91 3271 3.5 29 58 5887 0.5 8.15 3.70 1611 1682 4 W } Z o a U
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ST-58 187286 4.30 15478 3.5 62 124 26908 0.5 8.15 17.52 7621 7688 12 4 >w a w
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ST-64 156410 3.59 12926 3.5 57 114 22743 0.5 8.15 14.63 6365 6498 10 t o u
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ST-68 216161 4.96 17865 3.5 67 134 31423 0.5 8.15 20.22 8796 8978 12 \ .�m q O =ch 2 o
ST-69 141375 3.25 11700 3.5 54 108 20412 0.5 8.15 13.24 5761 5832 10
ST-70 216695 4.97 17909 3.5 67 134 31423 0.5 8.15 20.27 8818 8978 12 0
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ST-73 196824 4.52 16266 3.5 64 128 28672 0.5 8.15 18.41 8010 8192 12 J
ST-74 214481 4.92 17726 3.5 67 134 31423 0.5 8.15 20.06 8728 8978 12
ST-79 141375 3.61 12996 3.5 57 114 22743 0.5 8.15 14.71 6399 6498 10 Y oz
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ST-82 144349 3.31 11916 3.5 55 110 21175 0.5 8.15 13.49 5867 6050 10
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SKIMMER SEDIMENT BASIN DESIGN SKIMMER SEDIMENT BASIN EFFICIENCY SKIMMER
BASIN NUMBER DRAINAGE AREA DRAINAGE AREA REQUIRED VOLUME (1800 DEPTH**(2 FT MIN.) WIDTH* LENGTH* VOLUME PROVIDED RUNOFF COEFFICIENT RAINFALL INTENSITY FLOW Q25 REQUIRED SURFACE AREA AREA PROVIDED SIZE*** ORIFICE RADIUS ORIFACE DIAMETER
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SK-4 412171 9.46 17032 2 80 160 25600 0.5 8.15 38.56 12531 12800 3 1.4 2.8 m
SK-6 433373 9.95 17908 2 82 164 26896 0.5 8.15 40.54 13176 13448 3 1.4 2.9
SK-7 273445 6.28 11299 2 65 130 16900 0.5 8.15 25.58 8314 8450 2.5 1.2 2.4
SK-8 369842 8.49 15283 2 75 150 22500 0.5 8.15 34.60 11244 11250 3 1.3 2.6
SK-9 370162 8.50 15296 2 76 152 23104 0.5 8.15 34.63 11254 11552 3 1.3 2.7
SK-10 259921 5.97 10741 2 63 126 15876 0.5 8.15 24.32 7902 7938 2.5 1.2 2.3
SK-11 415643 9.54 17175 2 80 160 25600 0.5 8.15 38.88 12637 12800 3 1.4 2.8 a a a a a
SK-14 419258 9.62 17325 2 80 160 25600 0.5 8.15 39.22 12747 12800 3 1.4 2.8
SK-17 361480 8.30 14937 2 75 150 22500 0.5 8.15 33.82 10990 11250 3 1.3 2.6
SK-18 391235 8.98 16167 2 78 156 24336 0.5 8.15 36.60 11895 12168 3 1.4 2.7
SK-19 433497 9.95 17913 2 82 164 26896 0.5 8.15 40.55 13180 13448 3 1.4 2.9
SK-21 384742 8.83 15898 2 77 154 23716 0.5 8.15 35.99 11697 11858 3 1.3 2.7
SK-24 435654 10.00 18002 2 82 164 26896 0.5 8.15 40.76 13245 13448 3 1.4 2.9
SK-25 434762 9.98 17965 2 82 164 26896 0.5 8.15 40.67 13218 13448 3 1.4 2.9
SK-27 332714 7.64 13749 2 72 144 20736 0.5 8.15 31.13 10116 10368 3 1.3 2.5
SK-29 321180 7.37 13272 2 70 140 19600 0.5 8.15 30.05 9765 9800 3 1.2 2.5 N
SK-31 387671 8.90 16019 2 77 154 23716 0.5 8.15 36.27 11787 11858 3 1.3 2.7 C
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SK-33 329176 7.56 13602 2 71 142 20164 0.5 8.15 30.79 10008 10082 3 1.2 2.5 H m
SK-34 401863 9.23 16606 2 79 158 24964 0.5 8.15 37.59 12218 12482 3 1.4 2.8 O t w c
SK-35 333494 7.66 13781 2 72 144 20736 0.5 8.15 31.20 10139 10368 3 1.3 2.5 J �w N < J a
SK-38 350026 8.04 14464 2 73 146 21316 0.5 8.15 32.74 10642 10658 3 1.3 2.6 W } Z o o U
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SK-39 269815 6.19 11149 2 65 130 16900 0.5 8.15 25.24 8203 8450 2.5 1.2 2.4 8 >� > Lo ¢ w
SK-41 316730 7.27 13088 2 70 140 19600 0.5 8.15 29.63 9630 9800 3 1.2 2.5 aCL < � a'
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SK-44 287424 6.60 11877 2 67 134 17956 0.5 8.15 26.89 8739 8978 3 1.2 2.5
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SK-46 369988 8.49 15289 2 75 150 22500 0.5 8.15 34.61 11249 11250 3 1.3 2.6 °
SK-53 365928 8.40 15121 2 75 150 22500 0.5 8.15 34.23 11125 11250 3 1.3 2.6
SK-57 345176 7.92 14263 2 73 146 21316 0.5 8.15 32.29 10495 10658 3 1.3 2.6 o
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SK-59 411331 9.44 16997 2 80 160 25600 0.5 8.15 38.48 12506 12800 3 1.4 2.8
SK-60 435080 9.99 17979 2 82 164 26896 0.5 8.15 40.70 13228 13448 3 1.4 2.9
co SK-61 309527 7.11 12790 2 69 138 19044 0.5 8.15 28.96 9411 9522 3 1.2 2.4 Q
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SK-71 402748 9.25 16642 2 79 158 24964 0.5 8.15 37.68 12245 12482 3 1.4 2.8 W a
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SK-75 425640 9.77 17588 2 81 162 26244 0.5 8.15 39.82 12941 13122 3 1.4 2.8
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SK-81 426768 9.80 17635 2 81 162 26244 0.5 8.15 39.92 12975 13122 3 1.4 2.8 O U Z
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IN TALLE TO CON N~
1.5 FT
GRADE 3600 CU FT/ACRE
12"MIN. c �" 5 FT
rT NOTES: tit 2� MAX Z
1.USE FOR DRAINAGE AREAS p o O �p jI O
NOT EXCEEDING 5(FIVE)ACRES. 1 (n
2.USE CLEAN COMPACTOR FILL MATERIAL FOR EARTH BERM. ^ 1.5 FT MIN FILTER w
FRONT VIEW CROSS SECTION FABRIC
NOTES: OVERFILL 6" SCREEN ACCESSIBLE THROUGH DOOR
STEEL POST DESIGN FOR SETTLEMENT VENT
1.USE SILT FENCE ONLY WHEN DRAINAGE AREA SETTLED 21„ 1'FREEBOARD
WOVEN WIRE FABRIC
DOES NOT EXCEED 1/4 ACRE AND NEVER IN TOP NOTE:
AREAS OF CONCENTRATED FLOW, SILT FENCE GEOTEXTILE FABRIC \ MIN \ #57 STONE _ =_I
2.END OF SILT FENCE NEEDS TO BE TURNED UPHILL. _ \+ \ o TTT SKIMMER IS TO BE A SURFACE
FILL SLOPE DEWATERING DEVICE SUCH AS BMP
3.INSPECT SILT FENCES AT LEAST ONCE A WEEK AND o_ FOR REPAIR OF SILT 1.5 FT gyp" 4 FT MIN ob' SKIMMER OR APPROVED DEVICE.
AFTER EACH RAINFALL. MAKE ANY REQUIRED " FENCE FAILURES,USE i I I-
REPAIRS IMMEDIATELY. Z I o$Q � o.. SLOPE
SIDE
� No.57 WASHED STONE. ' I— o ° o o I `�SLOPE MAX
FOR ANCHOR WHEN SILT 5 FT II- trb�a o
4.REMOVE SEDIMENT DEPOSITS AS NECESSARY TO GRADE FENCE IS PROTECTING MAX FILL ��oo qq-�o O o I I I I I
PROVIDE ADEQUATE STORAGE VOLUME FOR THE CATCH BASIN. O o
NEXT RAIN AND TO REDUCE PRESSURE ON THE FILTER o� -'O 1:1 SIDE SLOPE
6"MIN.COVER ' 0�=�0_0 MAX
FENCE, TAKE CARE TO AVOID UNDERMINING THE - OVER SKIRT FABRIC ��ooO NATURAL a a a a a
FENCE DURING CLEANOUT. 0
EXTEND WIRE 6"MIN.INTO TRENCH GROUND z O O O O O
AND ANCHOR SKIRT AS �3 FT
5.REMOVE ALL FENCING MATERIALS AND UNSTABLE DIRECTED BY ENGINEER• MIN
SEDIMENT DEPOSITS AND BRING THE AREA TO GRADE
AND STABILIZE IT AFTER THE CONTRIBUTING
DRAINAGE AREA HAS BEEN PROPERLY STABILIZED. SIDE VIEW DESIGN OF SPILLWAYS FLOAT
1 MAINTENANCE FLEXIBLE JOINT
DRAINAGE AREA WEIR LENGTH (RADIATOR HOSE)
(ACRES) (FT) INSPECT TEMPORARY SEDIMENT TRAPSAFTER EACH PERIODOF SIGNIFICANT RAINFALL.REMOVE SEDIMENT AND RESTORETRAPTO ITS ORIGINAL
1 4.0 DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE-HALF THE DESIGN DEPTH OF THE TRAP.PLACE THE SEDIMENT THAT IS REMOVED IN
2 6.0 A DESIGNATED DISPOSAL AREA AND REPLACE THE CONTAMINATED PART OF THE GRAVEL FACING.
3 8.0 CHECK THE STRUCTURE FOR DAMAGE FROM EROSION OR PIPING.PERIODICALLY CHECK THE DEPTH OF THE SPILLWAY TO ENSURE IT IS A MINIMUM
4 10.0 OF 1.5 FT BELOW THE LOW POINT OF THE EMBANKMENT.IMMEDIATELY FILL ANY SETTLEMENT OF THE EMBANKMENT TO SLIGHTLY ABOVE DESIGN OUTLET END:CONNECTION
5 12.0 GRADE.ANY RIP RAP DISPLACED FROM THE SPILLWAY MUST BE REPLACED IMMEDIATELY. TO OUTLET PIPE OR RISER
1 DIMENSIONS SHOWN ARE MINIMUM STABILIZETHE EMBANKMENT AND ALL DISTURBED AREAS ABOVE THE SEDIMENT POOLAND DOWNSTREAM FROM THETRAP IMMEDIATELY AFTER
BARREL PIPE LONGER THANSHOWN.NOT
CONSTRUCTION WITH SEEDING. INCLUDED WITH SKIMMER SUPPLIED BY USER.
NOTE: SEE SHEET 3 FOR
SKIMMER AND ORIFICE SIZE.
0
CD
2 SEDIMENT TRAP WITH SPILLWAY WEIR OUTLET 3 STANDARD SKIMMER DETAIL H w
� TEMPORARY SILT FENCE NTS NTS o �
NTS ;i
"_j 6 a j L(L
Ocn
4.+ W o
0
J W LL w 3
J
GRADE
f— W � Quio aU
25'DIVERSION BER O ?� J a W
BONDED/NOT DISTURBED AREA 5' 25'DIVERSION BERM SILT FENCE aL < u
SILT FENCE 5,IPES rn
OAD RISERSxRUCTURE Of q) p =
LO I SKI MMER{SZEVAR.; m M 0
- I I-I I-I I I I-I I I I I-I I-I I-I I-I I-I I- I STEEL POSTS(QUANTITY MAR�I
I I QO, EMBANKMENT o
/ 5T4NEEHER�V v
pLA571C5LdPEDRAINPIPE J ❑ISSIPATOR J
SEDIMENT TRAPS TO PRACTICE STANDARD6.321 -' 6
BE PLACED AT LOW POINTS OR
GEOTEKTILE LINING
c
nIVIP-nRARY OR .
PERMANENT DITCH
)rl E M ERGENCY S P ILLWAY z
Plan View ej ACCESS/PIPELINE CORRIDOR [PRACTICEIBER STA DARD6.S51 STON€PAD O
NTS PLAID VIEW WOOD STAKE W a
4 i]RMETALP051 U
} Z
Inflow
structure 0
c
TOP OF EMBANKMENT
c R ISE R STR ULTURE 2 0
O
TRASH RACK 39 11Oq EMERGENCYSPILLWAf
lu MELOAn- , ' Z
i'Mln. I t }� y -0.
J SKIMMER
aye-AP�R1 1 2-10 '13 (� w
Q � -- w tl� �9u.�UN�Yu-IYI=Il�I fu4- r Z
MR-9-2 Ey
LU
rn Fes, x
Skimmer r BARREL (n �fU)PIPE mj w V
7) dewatering r +r
o device Emergency Z
+
spillway 11 �• `. N � % •`C . `S/
_ CLASS 95TONE PAD 1 LFT-0FF a S
AMTIFLOSATION BLOCK SECTIONAL VIEW STABILIZED O
Average __ Area* 1A'X 4'X J'MIN, TRENCH I SEEP 0-
v c Width W L rr�� 2'DEER
COLLAR OUTLET (/)
Co Wala 1.2 of Q
* Area of basin water surface at Baffles
e top of principal spillway elevation Z Q Q J
Qw NOTES Y I_I_I
U Co 1.SEED AND PLACE MATTING FOR E ROSION CONTROL ON INTERIOR AND EXTERIOR SIDE5LOPES, 14
3 2.INSTALLA MINIMUM OF 3COIRFIBER8AFFLES INACCORDANCEWITH PIRACTICE STAN0APD 5.65, J
g 3.INSTALL SKIMMER AND COUPUN S TO RISER STRUCTURE OR DIRECTLY INTO EMBANKMENT 1 FT.FROM BOTTOM OF BASIN. Q
mi
QIQ 1'Freeboard Embankment Inflow Baffles } 4,THE ARM PIPE SHALL HAVE MINIMUM LENGTH OF 6 FT.BETWEEN THE SKIMMER AN000UPLING, NDT TO 5CALE �
structure �
Q W
�xU IIaFl z
D a)C:
Df n Dewaterirg A
ai
6'min:invert elevation of r ' O
c c emergenty spillway
1n L y a
C m a) Filt r .0 Tic Esp Ilwayy X
W �I� coa rse aggregate
oI Sediment Cross-Section ILL
6 nY storage zone
View SEDIMENT BASIN Q
U) c- 7
°T� NTS =U2�
EQ 4 SKIMMER SEDIMENT BASIN DESIGNED BY: MEW
E�I>
� �U
a)X� NTS g TEMPORARY ROCK CONSTRUCTION ENTRANCE
�xJ NTS DRAWN BY: MEW
zoo CHECKED BY: TCM
m N
a W DATE: 05-16-2014
m_
z
SCALE: E
w co
X LO
o�I ORIGINAL SCALE IN INCHES FOR
w 3 REDUCED PLANS
0 0.5 1.0 1.5 2.0 CD
—x
c�
W66 ESCP 2
(DLL 0)
0o FOR REVIEW9 LJ
ou NOT RELEASED FOR CONSTRUCTION
<< 9 of 9 sheets
aQ d
02-21-12 REVISED BY: CAL