REV09350

• Permit No: C1981018
• IBM Index Class Name: Revision
• Doc Date: 9/30/1997
• Doc Name: BLUE MOUNTAIN ENERGY DESERADO MINE C-81-018 TR 42 MERGER OF REFUSE PILES 2 3 4
• From: DMG
• To: BLUE MOUNTAIN ENERGY
• Type & Sequence: TR42
• Media Type: D
• Archive: No

REFUSE AREA 2-3 & 4
COMBINATION
CONTRIBUTING AREA # S[ZE PEAK C.F.S.
EAST:
AREA 1 3.13 ACRES 5.17 C.F.S.
AREA 2 7.52 ACRES 12.43 C.F.S.
AREA 3 10.81 ACRES 17.87 C.F.S.
AREA 4 1.49 ACRES 2.46 C.F.5.
AREA 5 1.55 ACRES 2.56 C.F.S.
AREA 6 2.05 ACRES 3.39 C.F.S.
AREA 7 2.69 ACRES 4.45 C.F.S.
AREA 8 1.99 ACRES 3.29 C.F.S.
WEST:
AREA I 6.28 ACRES 10.38 C.F.S.
AREA 2 6.62 ACRES 10.94 C.F.S.
AREA 3 2.78 ACRES 4.60 C.F.S.
AREA 4 2.36 ACRES 3.90 C.F.S.
AREA 5 0.73 ACRES 1.21 C.F.S.
AREA 6 0.78 ACRES 1.29 C.F.S.
AREA 7 2.05 ACRES 3.39 C.F.S.
AREA 8 1.68 ACRES 2.78 C.F.S.
AREA 9 5.85 ACRES 9.67 C.F.S.
DITCH
SEG. # ACCUMULATED
PEAK FLOW MAX
ALLOW S% ACTUAL
DITCH S% VELOCITY
CONTROL SPACING
EAST:
#1 5.17 C.F.S. N/A 6.20% RIPRAP ENTIRE
#2 17.60 C.F.S. 0.40% 2.00% CHECK DAM 62.5 FT.
#3 35.47 C.F.S. N/A 5.00% RIPRAP ENTIRE
#4 37.93 C.F.S. N/A 7.10% RIPRAP ENTIRE
#5 40.49 C.F.S. N!A 20.00% RIPRAP ENTIRE
#6 3.39 C.F.S. N/A 15.00% RIPRAP ENTIRE
#7 4.45 C.F.S. N/A 6.90% RIPRAP ENTIRE
#8 7.74 C.F.S. 0.65% 4.30% CHECK DAM 27 FT.
WEST:
#1 10.38 C.F.S. N/A 8.90% RIPRAP ENTIRE
#2 21.32 C.F.S. 0.35% 2.50% CHECK DAM 45.5 FT.
#3 25.92 C.F.S. 0.30°t° 2.50% CHECK DAM 45.5 FT.
#4 29.82 C.F.S. N/A 13.37% RIPRAP ENTIRE
#5 31.03 C.F.S. N/A 8.90% RIPRAP ENTIRE
#6 32.32 C.F.S. N/A 20.00% RIPRAP ENTIRE
#7 35.71 C.F.S. 0.25% 3.70% CHECK DAM 29 FT.
#8 2.78 C.F.S. N/A 15.40% RIPRAP ENTIRE