2009-02-19_GENERAL DOCUMENTS - M1997032

• Permit No: M1997032
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 2/19/2009
• Doc Name: Drainage report
• From: Denison Mines ‎(USA)‎ Corp.
• To: DRMS
• Email Name: RCO
• Media Type: D
• Archive: No

Contents
Section 1 Introduction
1.1 Location ...................................................................................................1-1
1.2 Procedure and Approach ......................................................................1-1
Section 2 Drainage Control Design
2.1 Existing Drainage Conditions .............................................................. 2-1
2.2 Drainage Plan ......................................................................................... 2-1
2.3 Peak Discharge Estimate ....................................................................... 2-1
2.4 Surface Water Control Structure Design ............................................ 2-2
2.4.1 Channel Design ....................................................................... 2-2
2.4.2 Berm Design ............................................................................ 2-3
Section 3 Conclusions and Recommendations
Section 4 References
Appendices
Appendix A USGS Regional Flood-Frequency Equations for Colorado
Appendix B Colorado Isopuvials of 100-yr 24-hr Precipitation in Tenths
of an Inch (NOAA Atlas 2 Volume 3)
Appendix C NRCS Soil Map and Soil Type Description for the Van 4
Mine Area
Exhibits
Exhibit A Van 4 Mine Surface Facility Area Drainage Plan and Details
Exhibit B Van 4 Mine Surface Facility Area Drainage Plan and Details
with Aerial Photograph
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