2007-08-17_PERMIT FILE - C1981035A ‎(4)‎

• Permit No: C1981035A
• IBM Index Class Name: PERMIT FILE
• Doc Date: 8/17/2007
• Doc Name: Reclamation Bond Information/Estimates
• Section_Exhibit Name: KI Appendix 12
• Media Type: D
• Archive: Yes

TASK 24 FINAL DRAINAGE CHANNEL CONSTRUCTION 100 YR STORM

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Ditch Design Freeboard Length Slope Design Xsec Areal Manning's Ex va o
i
Flow Capacity (ft) (°~) Design+ Fneeboard Velocity Vol
F equ
r
(~) (~) Xsec Area (ft') (fPs) `M'S OiYAI E~~~~

A 4.4 8.5 100 2% 3.0 / 6.0 2.8 600 ' e
B 10.6 17.3 330 4% 4.0 / 7.5 4.3 2475 Fabric
C 4.6 5.5 350 1.5% 1.0 ! 4.0 3.7 1400 None
D 1.5 2.7 770 4°~6 1.0 / 3.0 2.7 2310 None
E 4.6 5.2 190 14.5°~ 3.0 / 6.0 5.8 1140 Ri ra
F 4.4 6.9 35 42.9°r6 1.0 / 3.0 6.9 105 Ri ra
Totals CF 1.2Swell /27 = 297LCY
Manning's n for ditches A, B, C, D, = 0.025. Manning's n for ditches E & F, (riprap) = 0.050.
DITCH SIZING
I~-~
I~
Ditch A Ditch B
`~~Ti'I''_IS'[','L~ ,"~: L'' 1 O~`J }.1t L `I~11TL~ITL.~+' Ii 4lii- 1.
I~. T ~ ~~y T I I rI ~Ti_ i c - ~~ i rte. ~Ti~.
T._Lt=I L~ _ I
I I 21`SIDE SLOPE
DITCH E 8 F DESIGNS WITH RIPRAP
Ditch C
Ditch D
~6.0~ ~5.0 '-{
_F - z `.7i-~-r`te` err 4-'= 1 0 5 l -~-L. I I~'., i, l
rZ-rr~:rT]~LL~~r 1 It'~_rJ I I ~ 1
-2~~ \ ~ ~`1.0~
2'1 SIDE SLOPE
2:1 SIDE SLOPE
4.75 SQ. FT.
COST ANALYSIS:
Excavate 319LCY with Cat 307C. 5193 Total time = 3.1
1.0 SQ. F-f.
Using RS Means Site Work for riprap placement: Xsectional area for riprap = 4.75 cfnineal foot of channel.
(Channel E + F) x (Xsec) = 260ft x (4.75ft~) = 1,235cf, ~ 46cy
Machine placed costs = (46cy) x ($27.45) ~ 51263. Rate of placement is 62cy/8hr, 46/62 (8hr) = 5.9 hours.
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Cost of riprap = ($35/ton)(1.425tons/cy)(46cy) = 52294•
• . ,,..:-
Filter fabric costs: 90' x 8' roll =$38. 6"staples/roll @ $7. Ditch B @ 330'/90' x ($45) =1165. Assume 8 hrs installation
time.
Total costs: 13915 Total time: 17 hrs