2025-04-29_HYDROLOGY - M2007044

• Permit No: M2007044
• IBM Index Class Name: Hydrology
• Doc Date: 4/29/2025
• Doc Name: Hydrology Report
• From: Energy Fuels Resources Inc
• To: DRMS
• Annual Report Year: 2025
• Report Quarter_Month: 1
• Permit Index Doc Type: Hydrology Report
• Email Name: ACY
• Email Name: THM
• Media Type: D
• Archive: No

{
WHIRLWIND MINE,PERMIT NO.M-2007-044
FIRST QUARTER 2025 HYDROLOGICAL REPORT
Attachment 4.DP Spring
Monitoring Sampled Inflow Rate Field pH Temperature Dissolved Specific Oxygen-
Date (Y/N) (gpm) (s.u.) (deg. C) Oxygen Conductance Reduction Comments
(mg/L) (US/CM) Potential(mV)
3/10/2008 No 6 to 7 NM NM NM NM NM Sunny,Ave. of 2 feet snowpack
6/19/2008 No 7.2 7.42 11.0 7.22 524 126 Sunny, Dry
9/8/2008 No 5.2 8.00 11.9 9.49 544 166 Sunny, Dry
12/15/2008 No 8.2 7.96 4.8 9.42 532 97 Snowing, 4"snowpack
2/10/2009 No 8.5 5.22 4.7 9.30 562 126 Sunny, Cold, 3-4"snowpack
4/20/2009 No 8.3 7.64 6.6 9.16 546 190 Sunny, Dry
8/11/2009 No 5.9 7.68 12.0 8.25 532 190 Sunny, Hot, Dry
12/1/2009 No 7.9 8.11 4.8 10.54 548 115 Cold, clear skies
2/2/2010 No 7.9 6.73 4.7 10.71 526 177 Cold, clear skies, 3 ft of snow
6/2/2010 No 8.3 7.53 8.8 11.62 554 200 Sunny, Dry
7/28/2010 No 6.8 7.68 12.6 7.57 535 114 Sunny, Dry
11/4/2010 No 7.0 7.94 7.1 8.66 535 190 Sunny, Dry
4/18/2011 No 8.1 7.59 6.6 9.23 533 NM' Make-up for missed 1 Q1 1 monitoring,Sunny,warm,
clear skies
5/24/2011 No 9.2 7.81 8.0 8.43 551 62 Light showers, warm
8/15/2011 No 7.9 7.59 12.2 7.07 560 203 Partly cloudy, warm
10/25/2011 No 8.1 7.51 11.8 7.64 545 198 Overcast, light rain
3/28/2012 No 7.7 7.62 10.8 7.98 568 186 Dry and calm
8/7/2012 No 7.5 7.66 12.0 8.06 569 249 Clear water In Tank
11/14/2012 No NM 6.05 7.8 54.8% 769 129.2
3/18/2013 No 8.0 7.56 5.3 44.9% 577 231.7
6/4/2013 No 6.7 8.57 9.6 87.1% 533 217.1 water was clear
8/14/2013 N/A N/A N/A N/A N/A N/A N/A field notes were lost
11/12/2013 No 5.9 6.44 10.6 7.66 501 126.8
Q1 2014 No NM NM NM NM NM NM Inaccessible due to county road conditions
6/17/2014 No 6.0 6.0 11.36 6.05 629.0 185.1
9/9/2014 No 6.0 7.1 12.81 4.93 536.6 184
11/13/2014 No 7.0 7.1 7.54 5.64 537.0 119
3/31/2015 No 6.7 7.2 10.00 5.40 578.0 167
5/29/2015 No 7.0 7.1 11.40 8.02 532.7 261
11/9/2015 No 4.0 6.6 9.00 4.05 528.7 359
11/9/2015 No 4.0 6.6 9.00 4.05 528.7 359
3/31/2016 No 8.0 7.26 6.9 1.26 523.5 252
6/1/2016 Yes 6.5 6.05 9.1 1.25 541 476
8/3/2016 No 3.8 7.31 15.32 9.39 549.4 255
10/12/2016 No 1 4.3 7.27 11.26 9.97 545.4 220
3/24/2017 No 7.5 6.86 1 9.34 11.25 513.0 456
6/7/2017 Yes 6.0 7.17 1 12.52 5.06 522.7 367