2013-10-30_REVISION - M1977310 ‎(3)‎

• Permit No: M1977310
• IBM Index Class Name: REVISION
• Doc Date: 10/30/2013
• Doc Name: DRAINAGE DESIGN PLAN FOR THE JD6 MINE
• From: COTTER
• To: DRMS
• Type & Sequence: AM1
• Email Name: TC1
• Email Name: SJM
• Media Type: D
• Archive: No

JD -6 Mine - Drainage Design Plan
Figure 11.
Photograph of Stormwater and Sediment Retention Pond ............................. .............................25
Figure 12.
Site Map Showing Planned Stormwater Retention Pond in the Mine Facilities Area .................27
Figure 13.
Stage- Storage Curve for Planned SWRP ........................................................ .............................28
Figure 14.
Schematic of Stormwater Routing at the JD -6 Mine ...................................... .............................30
Figure 15.
Schematic of Stormwater Routing to the Planned SWRP .............................. .............................31
Figure 16.
Hydrograph for the Upper Diversion Structure .............................................. .............................32
Figure 17.
Hydrograph for the Middle Diversion Structure ............................................ .............................32
Figure 18.
Hydrographs for the Lower Diversion Structure East and North ................... .............................33
Figure 19.
Hydrographs for Planned Stormwater Retention Pond .................................. .............................41
Figure 20.
Depth of Water above Spillway Crest ............................................................ .............................42
LIST OF PLATES
Plate 1. JD -6 Mine Drainage Basins, Lease Boundary, Vent Holes, and Mine Facilities
Plate 2. Existing Channel Profiles for the Upper Diversion Structure
Plate 3. Planned Channel Reconstruction for the Upper Diversion Structure
Plate 4. Channel Profiles for the Middle Diversion Structure
Plate 5. Channel Profiles for the Lower Diversion Structure North and Lower Diversion Structure East
Plate 6. Engineering Drawing for the Planned Stormwater Retention Pond and Spillway
LIST OF ATTACHMENTS
Attachment 1. Rip Rap Granular Bedding Specifications (from UDFCD 2011)
Attachment 2. Culvert Hydraulic Profiles
Attachment 3. Channel Profiles — Surveyed May 28, 2013
Attachment 4. WinTR -55 and HydroCAD Output Files
Attachment 5. Channel Stability Analysis - WinXSPro Output Files for Current Condition
4148A.131028 Whetstone Associates