REP48441

• Permit No: C1981041
• IBM Index Class Name: Report
• Doc Date: 5/7/1992
• Doc Name: 1991 Annual Hydrologic Report
• Annual Report Year: 1991
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

Powderhorn Coal Company
SWGS-01 (cont.)
Mean Daily Flows (cfs) -- 1991 Water Year

APR MAY JUN JUL AUG SEP
1 1.30 0.99 M 1.07 M B
2 1.83 0.98 M 1.07 M B
3 1.65 0.98 M 0.98 M B
4 2.10 0.77 M 0.98 M B
5 1.71 0.91 M 1.82 M B
6 1.87 0.84 M 1.94 M B
7 1.83 0.76 3.33 1.52 M B
8 2.12 1.01 3.13 0.93 M B
9 2.01 1.91 2.92 1.55 M B
10 1.77 1.95 2.73 2.74 M B
11 1.40 1.91 2.55 2.70 M B
12 1.36 1.91 3.24 0.85 M B
13 1.52 2.12 2.60 1.28 M B
14 1.15 2.02 2.24 B M B
15 1.11 0.74 2.03 B B B
16 1.24 0.85 2.00 B B B
17 1.31 0.93 1.94 B B B
18 1.28 1.53 1.85 B B B
19 1.06 19.05 2.06 M B B
20 1.03 55.64 1.73 M B 0.82
21 1.10 55.81 1.68 M B B
22 1.31 38.39 1.68 M B B
23 1.45 33.36 1.57 M B B
24 1.37 M 1.47 M B B
25 1.25 M 1.36 M B B
26 2.04 M 1.26 M B B
27 1.45 M 1.26 M B B
28 2.03 M 1.16 M B 0.96
29 0.91 M 1.16 M B 1.01
30 0.80 M 1.16 M B B
31 - M - M B -
verage 1.48 .80 2. < .24 < <0.60
Table 591-2