2010-12-08_PERMIT FILE - C1981008A ‎(6)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/8/2010
• Doc Name: Collection/Diversion Ditches and Culverts Design Parameters
• Section_Exhibit Name: Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-1
• Media Type: D
• Archive: Yes

DITCH C27
Channel Design
Project: NUCLA MINE
By: B. Langenfeld Date: 05/26/09
Location: DITCH C27
Checked: Date:
Channel Type: Trapezoidal, Equal Side Slopes
1. Channel Geometric Properties
Dimensions : Left Side Slope ....
............................... = 1.00:1
Right Side Slope ... ...............................
= 1.00:1
Base Dimension ..... ..............................:
2.50
2. Design Parameters
Mannings coefficient, n ............ ..............................:
0.020
Bed Slope,s (%) ................... ..............................:
6.500
3. Design details
Discharge ......................... ..............................:
9.86 cfs
Depth of Flow ..................... ..............................:
0.99 feet
Velocity .......................... ..............................:
2.50 fps
Channel Lining .................... ..............................:
Cobbles and shingles
Freeboard ......................... ..............................:
0.30 feet
19111 Oil: 191 LVA
Time of Concentration (SCS Method)
Curve Number: 79
Length of Flow: 348.24 ft
Average Land Slope: 2.42 %
Time of Concentration: 0.151 hrs, 9.1 mins
Revised August 2009(PB06) Attachment 2.05.3(3) -1 -47