2007-11-07_HYDROLOGY - M1977300

• Permit No: M1977300
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/7/2007
• Doc Name: Hydrologic evaluation of mine closure & reclamation
• From: Whetstone Associates
• To: Cotter Corpoartion
• Media Type: D
• Archive: No

Schwartzwalder Mine -Hydrologic Evaluation of Mine Closure and Reclamation 36
Table 15. Average Rate of Water Level Rise in Mine Shaft
Average

Water
Mine Change in Ela sed
P Rate
Date
Elevation
Level Elevation
Days
of Rise
eft) ft/da
5/30/00 4606.6 Bottom of 1,900 210 37 5.7
7/6/00 4816.6 Bottom of 1,700
7/6/00
6/4/01 4816.6
5609 1 Bottom of 1,700 I
Mid 1 000 793 I 333 I 2.4

6/4/01
6/24/03 5609.1
6101 0 Mid 1,000
Bottom of 500 491.9 750.11 0.66
9/1/03 6178.67 Mid 400 160.2 424.00 0.38
10/29/04 6338 9 Above 300
10/29/04
7/12/06 6338.9
6518 3 Above 300 Level
84 ft below Steve 179.4 621.00 0.29

6/18/07
7/10/07 6568.55
6573 04 33.8 ft below Steve
29 3 ft below Steve 4.49 22.01 0.20
7/10/07 6573.04 29.3 ft below Steve 1.18 14.33 0.082
7/24/07 6574 22 28 1 ft below Steve

7/24/07
8/24/07 6574.221
6574 943 *Pumping, 1 ft shift in
transducer 0 72 30.83 0.023*

8/24/07 6574.943 27.4 ft below Steve 0.21 12.17 0.018
9/5/07 6575 157 27 1 ft below Steve
9/5/07
9/14/07 6575.157
6575 779 27.1 ft below Steve
26 5 ft below Steve 0.62 9.00 0.069

9/14/07
9/25/07 6575.779
6576 045 26.5 ft below Steve
26 3 ft below Steve 0 27 10.67 0.025
9/25/07 6576.045 26.3 ft below Steve 0.61 33.47 0.018
10/29/07 6576 656 25 6 ft below Steve
Water level and inflow data were also evaluated as functions of mine volume and elevation to determine
how these variables affect the rate of mine flooding. Mine void volumes by level are shown graphically in
Figure 23. Plots of the rate of water level rise and inflow against elevation and mine void volume are
presented in Figure 24 and Figure 25. Flooding data are summarized in Table 16.
4109B.071116 Whetstone Associates