REP41178

• Permit No: C1981014
• IBM Index Class Name: REPORT
• Doc Date: 4/27/2007
• Doc Name: 2006 Annual Hydrology Report
• From: Energy Fuels Coal, Inc.
• To: DRMS
• Annual Report Year: 2006
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

EFCI Southfeeld Mine -Year 2006 Annual Hydrology Report April 25, 2007
sedimentation ponds did not fill to the discharge point, so there was no pond discharge during 2006.
Review of historic stream flow data for Oak Creek indicates little variance between up stream and
down stream monitoring stations but significant reductions in flows for the past 5 years reflect
continuing drought conditions.
TABLE 9
STREAM FLOW MEASUREMENTS (cfs)
Quarter-Year Monitoring
Date Newlin
Creek
(Upper)
NC-2 Newlin
Creek
(Lower)
NC-1 ~ Magpie
Creek
(Upper)
MC-1 Magpie
Creek
(Lower)
MC-2 Oak
Creek
(Upper)
OC-2 Oak
Creek
(Lower)
OC-1 Second
Alkali
Creek
SA-1
1 st - 1999 1 /19/99 No flow No flow No flow No flow 0.56 0.54 No flow
2ntl - 7999 4/8-5/5/99 10.5 9.5 16.0 20.0 1.1 1.2 0.45
3rd - 1999 8/2/99 No flow No flow No flow No flow 4.5 4.2 No flow
4th - 1999 12/29/99 No flow No flow No flow No flow 1.6 1.6 No flow
1st - 2000 03/29/00 No flow No flow No flow No flow 1.6 1.6 No flow
2n° - 2000 05/02/00 2.4 1.6 No flow No flow 1.7 1.6 No flow
3rd - 2000 - - - No flow. No flow No flow No flow No flow No flow No flow
4th - 2000 - - - No flow No tlow No flow No flow No flow No flow No flow
1st - 2001 - - - No flow No flow No flow No flow No flow No flow No flow
2n0 - 2001 05/22/01 No flow No flow No flow No flow 4.7 4.3 No flow
3rd - 2001 - - - No flow No flow No flow No flow No flow No flow No flow
4th - 2001 - - - No flow No flow No flow No flow No flow No flow No flow
1st - 2002 - - - No flow No flow No flow No flow No flow No flow No flow
2ntl - 2002 - - - No flow No flow No flow No flow No flow No flow No flow
3rd - 2002 - - - No flow No flow No flow No flow No flow No flow No flow
4th - 2002 - - - No flow No flow No flow No flow No flow No flow No flow
1st - 2003 - - - No flow No flow No flow No flow No flow No flow No flow
2n° - 2003 - - - No flow No flow No flow No flow No flow No flow No flow
3rd - 2003 - - - No flow No flow No flow No flow No flow No flow No flow
4th - 2003 - - - No flow No flow No flow No flow No flow No flow No flow
2ntl - 2004 04/13/04 7.8 7.8 Minimal Minimal 0.03 0.03 No flow
4th - 2004 12/7/04 No flow No flow No flow No flow No flow No flow No flow
2nd - 2005 4/19/05 12.4 12.6 No flow No flow .02 .02 No flow
4"' - 2005 12/12/05 No flow No flow No flow No flow No flow No flow No flow
2ntl - 2006 6/20/06 No flow No flow No flow No flow No flow No flow No flow
4'" - 2006 11/20/06 No flow No flow No flow No flow No flow No flow No flow
Notes:
1. Zero data values =parameter was analyzed for but not detected.
2. Blank data felds = no data.
' Monitodn station moved accordin to Technical Revision No. 29
Historic field and laboratory water quality data for surface water monitoring stations on Oak, Creek
are summarized in Tables 12 and 13, Water Quality Data, Oak Creek.
6417/2006 annualhydrpt.doc NWCC INC. Page 24