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 6. Monitoring Well W-1
Monitoring Sampled Water Level Field pH Temperature Dissolved Specific Oxygen-
Date (Y/N) (ft BTOC) (s.u.) (deg. C) Oxygen (mg/L Conductance Reduction Comments
or%) (US/CM) Potential (mV)
10/21/2008 Yes 73.22 796 10.5 095 1543 124 Sunny, Dry, see Table 3
12/16/2008 Yes 74.44 7.73 99 1.47 1329 187 Overcast, 4''snow, see Table 3
2/10/2009 Yes 7473 782 10.1 1 093 1251 5 Sunny, Cold, snowpac , see Table
4/20/2009 Yes 75.00 7.34 10.9 0 13 1209 80 Sunny, Dry, see Table 3
6/24/2009 Yes 74.96 7.63 10.9 1157 -- Raining, cool, see Table 3
9/11/2009 Yes 74.84 7.91 11.3 0.23 1219 -75 Sunny, dry, see Table 3
12/10/2009 Yes 74.69 7.66 9.8 1_65 1182 80 Cold, overcast see Table 3
2/4/2010 Yes 74.40 7.01 10.7 0.61 1240 -74 Cold, clear skies, 3 ft of snow, see Table 3
6/7/2010 Yes 73.98 7.73 12.2 025 1239 -111 Hot, clear skies, dry, see Table 3
7/28/2010 No 73.48 NM NM NM NM NM Water level measurement only
11/4/2010 No 74.00 NM NM NM NM NM Water level measurement only
4/18/2011 No 73.94 NM NM NM NM NM Make-up for missed 1Q11 monitoring
5/24/2011 Yes 73.77 7.85 11 0 0.11 1210 10 Ptly cloudy, warm, see Table 3
8/16/2011 No 73.72 NM NM NM NM NM Water level measurement only
10/25/2011 No 7394 NM NM NM NM NM Water level measurement only, Overcast, light rain
3/28/2012 No 73.98 NM NM NM NM NM Water level measurement only, weather dry and calm
5/30/2012 Yes 73.98 7 72 10.9 1 61 1252 NM ORP Probe Broken
8/7/2012 No 74.00 NM NM NM NM NM
11/14/2012 No 74.05 NM NM NM NM NM
3/18/2013 No 73.95 NM NM NM NM NM
6/17/2013 Yes 7402 7.31 11 2 37.6% 1216 54.4 First bail the water was clear, but was muddy for the remainder of
the IDurqe.
8/14/2013 N/A N/A N/A N/A N/A N/A N/A Field notes were lost.
11/8/2013 No 73.89 6.38 10.6 0.206 1186 50.5
Q1 2014 No NM NM NM NM NM NM Inaccessible due to county road conditions
6/18/2014 Yes 73.27 6.42 11.3 1.7 1349 75
9/9/2014 No 7419 6.04 14.1 1.4 1386 317
11/13/2014 No 7429 6.61 11.0 4.6 1219 272
3/31/2015 No 7436 6.50 11.4 5.0 1340 282
5/29/2015 No 74.42 6.74 12.5 3.0 1438 328
8/5/2015 Yes 74.54 7.40 12.2 2.5 1484 330
11/9/2015 No 74 39 7A0 11.9 3.5 1250 326
3/31/2016 No 7440 7.13 11.05 1.7 1539 425
6/1/2016 Yes 7440 7.26 12.04 3.4 1432 421
8/3/2016 No 74.60 6.51 15.94 2.8 1463 301
10/12/2016 No 74.60 6.20 14.58 55 1507 290
3/24/2017 No 74.66 6.15 12.75 42 1332 504
6/7/2017 Yes 7465 7.22 12.66 6.6 1502 375
9/8/2017 No 74.50 6.95 1525 5.0 1438 290
10/20/2017 No 74.47 6.27 11.33 8.8 1376 80.3
3/22/2018 No 74.69 7.22 1088 4.8 1048 290
6/20/2018 Yes 74.69 7A5 11.46 6.5 1014 -7.7
9/7/2018 No 74.69 7.19 11.65 4.5 962 -349.9
12/14/2018 No 74.69 599 11.01 NM 1366 293