2011-01-13_PERMIT FILE - C1981038A ‎(6)‎

• Permit No: C1981038A
• IBM Index Class Name: Permit File
• Doc Date: 1/13/2011
• Doc Name: page 1 to 55
• Section_Exhibit Name: 2.05 Operation and Reclamation Plans
• Media Type: D
• Archive: Yes

2.05 APPLICATION FOR PERMIT FOR SURFACE OR UNDERGROUND MINING ACTIVITIES -
MZNIMUM REQUIREMENTS FOR OPERATION AND RECLAMATION PLANS.
Table 2.05-9 shows runoff expectations at East Mine.
TABLE 2.05-4
I•
Permit Renewal
RN -44 C4/9/09~
n)R--) OG
UPSTREAM AREA AND 10-YEAR, 29-HOUR INFLOW
OF EAST MINE SEDIMENT RETENTION PONDS
APPROXIMATE UPSTREAM ESTIMATED
AREA (ACRES) 10-YEAR
29-HOUR
DISTURBED 0.04 UNDISTURBED INFLOW
POND # ACRE FEET/ACRE 0.01 ACRE (ACRE FEET)
FEET/ACRE
1 - 18.7 0.19
9.3 - 0.37
2 - 9.3 0.09
6.6 - 0.26
3,4, - ~ 22.1 0.22
WASTE AREA POND 22.8 - 1.04
TOTAL 38.7 45.1 2.12
The total required and actual sedimentation pond storage volumes
are:
SEDIMENT
POND # VOLUME 10-YEAR,
24 HOUR TOTAL
REQUIRED ACTUAL
VOLUME
1 0.14 0.56 0.70 0.70
2 0.10 0.30 0.40 0.51
3,9 6 WASTE
AREA POND 0.34 1.26 1.60 1.79
Sedimentation Pond Nos. 1 through 9 are equipped with conduit
spillways which will allow de-watering as provided for in
4.05.5. The waste area pond was constructed with a non-clogging,
conduit-type de-watering device and spillway, as specified in
4.05.6(3). Water, after proper detention time, may be used for
dust control or re-vegetation efforts. The dams will be checked
after heavy rainfall or snow-melt for stability, safety, and
capacity by a qualified inspector.
Sediment volume will be monitored and ponds will be cleaned
according to the Sediment Monitoring Program.
The Sediment Monitoring Program is designed to comply with
4.05.6. See Ponds, Impoundments, and Dams Appendix in Volume BA.
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