2023-07-25_HYDROLOGY - M2007044

• Permit No: M2007044
• IBM Index Class Name: Hydrology
• Doc Date: 7/25/2023
• Doc Name: Hydrology Report
• From: Energy Fuels Resources Inc
• To: DRMS
• Annual Report Year: 2023
• Report Quarter_Month: 2
• Permit Index Doc Type: Hydrology Report
• Email Name: ACY
• Email Name: THM
• Media Type: D
• Archive: No

WHIRLWIND MINE,PERMIT NO.M-2007-044
SECOND QUARTER 2023 HYDROLOGICAL REPORT
Attachment 5.PR Spring
Dissolved peci isOxygen-
Monitoring Sampled Inflow Rate Field pH Temperature Oxygen Conductance Reduction
Date (Y/N) ( pm) (s.u.) (deg.C) (m /L) (US/cm) Potential(mV) Comments
3/22/2018 No 60 7.91 9.60 1100 577.0 120
6/20/2018 Yes 5.0 7.82 11.93 964 613.0 -4 7
9/7/2018 No 4.5 7.95 12.68 12.15 588.0 164
12/14/2018 No 4.5 683 602 ** 5570 337
Q1 2019 No NM NM NM NM NM NM Inaccessible due to county road conditions
6/25/2019 Yes 6.5 803 1220 6.44 7850 238
9/13/2019 No 4.2 788 1259 927 8120 295
11/8/2019 No 4.9 8.10 11.14 1034 802.7 337
3/27/2020 No 2.5 810 9.19 10.70 7730 896
6/24/2020 Yes 45 798 11.49 9.88 7540 413
9/11/2020 No 2.8 810 11.65 8.51 8830 242
11/6/2020 No 20 8.25 11.19 8.92 853.0 251
Q1 2021 No NM NM NM NM NM NM Inaccessible due to county road conditions
6/18/2021 No 20 6.78 12.06 10.48 860.0 176
7/13/2021 Yes 50 7.58 1415 9.55 819.0 255
9/9/2021 No 5.0 7.91 12.26 9.25 857.0 253
11/9/2021 No 4.5 7.60 902 13.88 6680 67.2
3/30/2022 Yes 6.6 7.87 945 1338 765.0 132.7
6/23/2022 No 45 8.43 11.07 12.21 828.0 235.7
8/1/2022 Yes 50 798 1300 9.57 8276 4120
11/16/2022 Yes 4.1 6.62 11.46 9.66 888.4 4890
Q1 2023 No NM NM NM NM NM NM Inaccessible due to county road conditions
5/10/2023 Yes 55 812 974 9.43 490.0 243
*-ORP Probe broken during 4/18/11 Monitoring Event.
**-Meter malfunctioned during site visit-no measurements were taken
Note- PR Spring not accessible in February or March, 2010 due to deep snow
NM= Not Measured