REP45946

• Permit No: C1981014
• IBM Index Class Name: Report
• Doc Date: 5/12/2006
• Doc Name: 2005 Annual Hydrology Report
• From: Energy Fuels Coal, Inc.
• To: DMG
• Annual Report Year: 2005
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

EFCI Southfield Mine -Year 2005 Annual Hydrology Report May 11, 2006
2.0 GROUND WATER INFLOWS, USE AND DISCHARGE
2.1 Mine Inflows
As previously noted in Section 1.0, quarterly mine inflow monitoring was discontinued after
September 2001 because access to monitoring sites was eliminated when the mine portals were
sealed in December 2001. Mine inflows for 2001, as the last reporting period, were estimated at 5.2
acre-feet, as presented in Table 1, Mine Water Inflow Summary. The monitoring locations are
shown on Figure 1. Prior to 2002, these locations were monitored semi-annually during the spring
and fall for each annual reporting period. The 2001 mine inflows represented a decrease from prior
yeazs possibly due to continuing drought conditions at that time. Review of historic mine inflow
water quality monitoring results from previous Annual Hydrology Reports indicates little variance
in inflow water quality over time.
TABLE 1
MINE WATER INFLOW DATA SUMMARY (from 2001 AHR)
Mine Inflow Estimated Monitor Field Data
or Seep Mine Area Duration Annual Dates pH Temp. Conduct.
(Map I.D. Quantity (M/D/Y) (Units) a
I C)
lumhos/cm)
No.l (Acre-Ftl
Peacock Mine Continuous 1.1 03/21/01 5.1 13.1 3,083
1 seep 09/25/01 5.4 13.2 3,247
2 South Shaft Continuous 0.5 03/21/01 8.1 10.5 2,248
2
09/25/01 8.4 12.0 1, 902
2 South-Last Continuous 1.4 03/21/01 8.1 10.5 2,586
3 Panel seeps 09/25/01 8.3 12.4 2,825
1 South Mains Continuous 1.6 03/21/01 8.2 10.8 2,719
4
seeps 09/25/01 8.3 11.8 2,983
Moose Panel Jan-May 0.6 03/21/01 6.8 10.3 3,432
5
seeps
Total Estimated Inflow
l
5.2 Acre-Ft
(within accessible areas)
Notes from 2001
1. Approx. 1.7 Ac-Ft pumped to the West Mains from combined areas 2 and 4, above.
2. Approx. 1.1 Ac-Ft pumped to the 1 North section from area 1, above.
Inflow from areas 3 and 5, above, flows (by gravity) to the West Mains.
9/01 represents last period mine inflows were monitored prior to sealing mine portals
2.2 Mine Water Handling, Use, Consumption and Discharge
During active operations, water-handling systems in the mine captured most mine water inflows
near their source. Within the mine, captured mine water was pumped to sumps located in Crosscut
32 or the 1st North Mains, or flowed by gravity to the mined-out and abandoned west azea of the
mine. Water from the Crosscut 32 sump was pumped to the West Mains where it flowed by gravity
to the abandoned west area of the mine. Prior to sealing of the mine, mine water handling activities
were discontinued. Mine inflows will continue within the sealed mine workings and water will
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