2016-08-08_PERMIT FILE - C1981019A ‎(115)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 8/8/2016
• Doc Name: Sediment Control System Analysis at End of Mining
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 23 Part I
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
r......—k+4000 on4no— 1, i c..P. k
Structure #27 (Null
Null at 105
Structure #26 (Riprap Channel)
Little Collom channel 1O5 to 90
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Bottom Left Right
w/o Freeboard w/ Freeboard
Manning's n:
0.0510
Dmin:
3.00 in
D50:
6.00 in
Dmax:
9.00 in
Structure #27 (Null
Null at 105
Structure #26 (Riprap Channel)
Little Collom channel 1O5 to 90
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Bottom Left Right
Freeboard Freeboard Freeboard
Sideslope Sideslope Slope (%)
Width (ft) Ratio Ratio
Depth (ft) % of Depth Mult. x (VxD)
20.00 3.0:1 3.0:1 5.5
0.57 ft
Riprap Channel Results:
PADER Method - Steep Slope Design
Structure #25 (Null)
Null at 90
Structure #24 (Riprap Channel)
Little Collom channel 90 to 68
Trapezoidal Riprap Channel Inputs:
Material: Riprap
K1 -j
Filename Rev 3 PR04 East Side Ponds sed EOM 1024.sc4 Printed 02-13-2016
Exh. 7-23I-70 Revision Date: 2/15/2016
Revision No.: PR -04
w/o Freeboard w/ Freeboard
Design Discharge:
65.82 cfs
Depth:
0.57 ft
Top Width:
23.43 ft
Velocity:
5.30 fps
X -Section Area:
12.43 sq ft
Hydraulic Radius:
0.526 ft
Froude Number:
1.28
Manning's n:
0.0430
Dmin:
2.00 in
D50:
3.00 in
Dmax:
4.50 in
Structure #25 (Null)
Null at 90
Structure #24 (Riprap Channel)
Little Collom channel 90 to 68
Trapezoidal Riprap Channel Inputs:
Material: Riprap
K1 -j
Filename Rev 3 PR04 East Side Ponds sed EOM 1024.sc4 Printed 02-13-2016
Exh. 7-23I-70 Revision Date: 2/15/2016
Revision No.: PR -04