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
•
• DITCH E & F DESIGNS WITH RIPRAP
8,0
4.75 SQ. FT.
21 SIDE SLOPE
1.0 SQ. F-f.
COST ANALYSIS:
Excavate 319LCY with Cat 307C. $193 Total time = 3.1
Using RS Means Site Work for riprap placement: Xsectional area for riprap = 4.75 cf/lineal foot of channel.
(Channel E + F) x (Xsec) = 260ft x (4.75ft2) = 1,235cf, ~ 46cy.
Machine placed costs = (46cy) x ($27.45) ~ $1263. Rate of placement is 62cy/8hr, 46/62 (8hr) = 5.9 hours.
Cost of riprap = ($35/ton)(1.425tons/cy)(46cy) _ $2294.
Filter fabric costs: 90' x 8' roll =$38. 6"staples/roll @ $7. Ditch B @ 330'/90' x ($45) _ $165. Assume 8 hrs installation
• time.
Total costs: $3915 Total time: 17 hrs
Ditch Design
Flow
(cfs) Freeboard
Capacity
(cfs) Length
(ft) Slope
(%) Design Xsec Area/
Design+ Freeboard
XsE:c Area (ft2) Manning's
Velocity
(fps) Excat,~yQ
Volum~(~;
~a~~~F~ r t c
ui d
5~~~ A.~.p~~c
A 4.4 8.5 100 2% 3.0 / 6.0 2.8 600 ' `~d~~19~''
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% 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% 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 F_ & F, (riprap) = 0.050.
DITCH SIZING
Ditch C
Ditch D
% ~ 10 ~ ,_~ ~ ~ 1.0
c~~1. SIDE SL(JPE