1999-06-30_REVISION - M1977342

• Permit No: M1977342
• IBM Index Class Name: Revision
• Doc Date: 6/30/1999
• Doc Name: Technical Revision TR-08 application
• From: CLIMAX MOLYBDENUM CO
• To: DMG
• Type & Sequence: TR8
• Media Type: D
• Archive: No

1070.13 Henderson Mine • •
RATIONAL RUNOFF METHOD
AND STORM PRECIPITATION
Precipitation Depths per NOAA Atlas
Job No: 1070,13 Full Year May-Oct Part Duration
Client. Climax Molybdenum Co. Return 6-Hr. 24-Hr. 6-Hr. 24-Hr.
Location: Henderson Mine Period Storm Stonn Probabir Storm Storm
Latitude: 39.45
Longitude: 105.28.45 2 1.10 1.60 0.5 1.00 1.40
5 1.40 200 0.2 1.20 1.80
10 1.70 2.30 0.1 1.40 2.10
25 2. 0 . 0 0.0 1. 0 20
50 2.2 3
0 3.000 0.022 1.80 2,7,70
100 2.40 3.40 0.01 2.00 3.00
i
Temporal Values Intensity(irlfhr)
Duration Full Year Full Year May-Oct May-Ott Duration Full Year Full Year May-Oct May-Oct
(min) 2-Yr RP 100-Yr RP 0.5 0.01 (min) 2 100 0.5 0.01
1.440 1.60 3.40 1.40 3.00 1,440 0.07 0.14 0.06 0.13
360 1.10 2.40 1.00 2.00 360 0.18 0.40 0.17 0.33
fi0 0.75 2.05 0.72 1.89 60 0.75 2.05 0.72 189
30 0.60 1.62 0.57 1.49 30 1.19 3.24 1.14 2.99
1 15 0.43 1.17 0.41 1.08 15 1.72 4.67 1.65 4.31
10 0.34 0.92 0.33 0.85 10 2.04 5.53 1.96 5.10
5 0.22 0.59 0.21 0.55 5 2.62 7.13 2.52 6.58
Interpolated Depth for Other Return Periods
Full Return Period
Year Ret.Per. Interce t Sloe 5 10 25 50
1, 4401 1.281 1.059 2.02 2.34 2.76 3.08
360 0.870 0.765 1.40 1.63 1.94 2.17
t 60 0.525 0.762 1.06 12.9 1.59 1.82
1 30 0.415 0.602 0.84 1.02 I.26 1.44
15 0.299 0.434 0.60 0.73 0.91 1.04
10 0.236 0.343 0.48 0.58 0.72 0.82
5 0.152 0.221 0.31 037 0.46 0.53
Partial
Duration
Probability» 0.2 0.1 0.04 0.02
Ret.Per. Intercept Sloe 5 10 25 s0
1.4411 1.111 0.942 1.77 2.06 2.43 2.72
360 0.823 0.589 1.23 1.41 1.65 1.82
60 0.518 0.686 1.00 1.20 1.48 1,68
30 0.409 0.542 0.79 0.95 1.17 1.33
15 0.295 0.391 0.57 0.69 0.84 0.96
10 0.233 0.309 0.45 0.54 0.66 0.76
5 0.150 0.199 0.29 0.35 0.43 0.49
Interpolated Intensity for Other Return Periods
Full Year Partial Duration May-Oct
Return Period 0.2 0 0.04 0.02
Ret.Per. 5 10 2S 50 Ret.Per. 5 100 25 50
1,440 0.08 0.10 0.12 0.13 1.440 0.07 0.09 0.10 0.11
360 0.23 0.27 0.32 0.36 360 0.21 0.24 0.27 0.30
60 1.06 1.29 1.59 1.82 60 1.00 1.20 1.48 1.68
30 1.67 2.03 2.51 2.67 30 1,58 1.90 2.33 2.66
15 2.41 2.93 3.63 4.15 15 2.27 2.75 3.37 3.84
10 2.85 3.47 4.29 4.91 10 2,69 3.25 3.99 4S5
• 5 368 4.48 5.53 6.33 5 3,47 4.19 5.14 5.86
Figure 2b
Precip Assoc.,
W.W.Wheeler and A .,Inc.
3R559