2013-04-29_REPORT - C1981014

• Permit No: C1981014
• IBM Index Class Name: REPORT
• Doc Date: 4/29/2013
• Doc Name: 2012 Annual Hydrology Report
• From: Energy Fuels Coal, Inc
• To: DRMS
• Annual Report Year: 2012
• Permit Index Doc Type: Hydrology Report
• Email Name: JHB
• Email Name: DIH
• Media Type: D
• Archive: No

EFCI Southfield Mine — 2012 Annual Hydrology Report
3.3 Surface Water Monitoring Results
Mine Area
The mine and adjacent areas fall within the lower portions of the Magpie and Newlin Creek
drainages and encompass the central portion of the Second Alkali Creek drainage, all of which are
tributary to the Arkansas River. Newlin Creek is a perennial drainage above the mine permit area
and to the diversion point for the City of Florence Municipal Water Supply. Within the mine permit
boundary, flows in Newlin, Magpie, and Second Alkali Creeks are all ephemeral (refer to Section
2.04.7 of the Southfield permit application for more details). EFCI monitors any significant stream
flows in Newlin, Magpie, and Second Alkali Creeks, and also monitors any storm water runoff
discharge from the two remaining sedimentation structures.
In the mine site area, the current surface water monitoring program includes the following
monitoring stations, located as shown on Figure 1, Mine Monitoring Locations:
Station
NC -2
NC -1
MC -1
MC -2
SA -1
NPDES 002
NPDES 004
2012 AHR text doc
Location
E' /2SE'/4, Sec 26
W1/4NE1/4, Sec 19
E' /2NW' /4, Sec 30
W'/2NE1/4, Sec 30
E'/2NW1/4, Sec 24
E' /2NW1/4, Sec 30
' W' /2SE' /4, Sec 19
Page 18
[Designation
Newlin Creek (Upper)
Newlin Creek (Lower)
April 18, 2013
Magpie Creek (Upper)
Magpie Creek (Lower)
Second Alkali Creek, near MW -65
' Pond 4 (outfall to Newlin Creek)
Pond 5 (outfall to Magpie Creek)
H
Two sediment ponds (1 and 3), and associated outfalls, were removed and reclaimed in conjunction
with final mine reclamation activities. Two remaining sedimentation ponds (Ponds 4 and 5) collect
and treat storm runoff from the reclaimed mine site. A local thundershower during late September
accumulated water in Pond 5 to a level of 21 inches below the top of the vertical primary discharge
spillway structure. As a result of the same storm event, Pond 4 accumulated water having an
estimated depth of approximately 2 feet. Precipitation during the rest of the reporting period was
very sparse and did not generate enough runoff to reach either pond. No NPDES discharges from
ponds occurred in 2012 so there is no corresponding field or analytical data enclosed.
Surface water monitoring is conducted on a semi - annual basis, typically in April and December.
Field and laboratory analysis data for surface water monitoring stations are summarized in the
following discussions. Stream flow measurements since 1999 are provided in Table 8; field and
laboratory data for the reporting period are included in Appendix B.
Dry creek beds prevailed in Magpie Creek and in Second Alkali Creek throughout the reporting
period. Low flow was observed above the upper Newlin Creek monitoring point (NC2) during
April while no flow was observed at the lower monitoring point (NC 1).
During the beginning of the report year, the landowner, The Corley Company (Corley) filed
concerns with the DRMS and EFCI about diminished water flow in Newlin Creek. In response to
the concerns, the DRMS held a joint inspection on March 27, 2012 at the Newlin Creek site. The