2008-05-29_REVISION - M1977285

• Permit No: M1977285
• IBM Index Class Name: REVISION
• Doc Date: 5/29/2008
• Doc Name: Drainage report for Sunday Mines Group
• From: Denison Mines
• To: DRMS
• Type & Sequence: AD1
• Email Name: RCO
• Media Type: D
• Archive: No

Topaz Mine
Basin Basin Area 100-yr, 24-hr Storm Runoff Runoff Vol Catchment Area Berm Height
Calculated Design Freeboard
(sq-ft) (ac) (in) (in) (ft^3) (sq-ft) (ft) (ft) (ft)
3 212,573 4.88 3 2.35 41,629 109,607 0.38 5-6 4.62-5.62
Basin Basin Area 100-yr, 24-hr Storm Runoff Runoff Vol Catchment Basin Calculated Vol Depth
Length Width Bank Slope Min Depth Design Freeboard
(sq-ft) (ac) (in) (in) (ft^3) (ft^3) (ft) (ft) Oft) (ft^3) (ft) (ft)
4 114,563 2.63 3 2.35 22,435 190 60 3 22,435 2.30 1.00 3.30
West Sundav Mine
Basin Basin Area 100-yr, 24-hr Storm Runoff Runoff Vol Catchment Area Berm Height
Calculated Freeboard Design
(sq-ft) (ac) (in) (in) (ft^3) (sq-ft) (ft) (ft) (ft)
3 144,959 3.33 3 2.35 28,388 84,649 0.34 1.00 1.34
Basin Basin Area 100-yr, 24-hr Storm Runoff Runoff Vol Catchment Basin Calculated Vol Depth
Length Width Bank Slope Min Depth Freeboard Design
(sq-ft) (ac) (in) (in) (ft^3) (ft^3) (ft) (ft) (ft/ft) (ft^3) (ft) (ft)
4 114,106 2.62 3 2.35 22,346 170 40 1.5 22,346 3.98 1.00 4.98
St. Jude Mine
Basin Basin Area 100-yr, 24-hr Storm Runoff Runoff Vol Catchment Area Berm Height
Calculated Freeboard Design
(sq-ft) (ac) (in) (in) (ft^3) (sq-ft) (ft) (ft) (ft)
3 137,992 3.17 3 2.35 27,023 65,650 0.41 1.00 1.41
Basin Basin Area 100-yr, 24-hr Storm Runoff Runoff Vol Catchment Basin Calculated Vol Depth
Length Width Bank Slope Min Depth Freeboard Design
(sq-ft) (ac) (in) (in) (ft^3) (ft^3) (ft) (ft) (ftKt) (ft^3) (ft) (ft)
4 77,294 1.77 3 2.35 15,137 150 40 1.5 15,137 2.91 1.00 3.91
5 37,405 0.86 3 2.35 7,325 100 30 1.5 7,325 2.98 1.00 3.98