2019-09-18_PERMIT FILE - C1981035 ‎(9)‎

• Permit No: C1981035
• IBM Index Class Name: PERMIT FILE
• Doc Date: 9/18/2019
• Doc Name: Hydrologic Designs
• Section_Exhibit Name: KI Appendix 11
• Media Type: D
• Archive: No

• Table of Contents
1. Scope and Purpose ------ ------------------- -------------------- ---------- --------- ---------- --------- 1
2. Mine Drainage Plan ................................................................................... 1
2.1 Diversion of Uncontaminated Runoff ................. ...................................... 1
2.2 Treatment of Yard Runoff .. .................................................................... 2
3. Drainage Basin Characteristics .................................................................... 3
3.1 Basin Geometry and Soils ..................................................................... 3
3.2 SCS Curve Number .............................................................................. 3 -

.....
4. HydrologY ....................................................................
5
.......................
4.1 West Hillside Area ............................................... 5
.................................
4.2 Peak Discharges and Volumes ............................................................... 6
5. Drainage Structures .................................................
. 6
.
...............................
5
1 Pipes and Channels
.
.............................................................................
5.2 Yard Drainage Routed to Ponds ... ..-,.,.-,
................................................. 6
7
5.3 Drainage Structure Summary ................................................................. 7
5.4 Rip-rap Design for the Eastside Drainage Channel ................................... 9 ,i
• 8. Sediment Ponds .......... ............................................................................. 10
6
1 H
drolo
.
y
gy ...............................................................................:............ 10
6.2 Watershed Sediment Yield
....................................................................
12
6.3 Pond Geometry .................................................................................... 13
6.4 Outlet Works and Trash Rack
................................................................
13
7. Topsoil Storage Pile Drainage
....................................................................
14
•
January 1998 ~'