2022-12-14_HYDROLOGY - M2008017 ‎(2)‎

• Permit No: M2008017
• IBM Index Class Name: Hydrology
• Doc Date: 12/14/2022
• Doc Name Note: Monthly water level summary 12-22
• Doc Name: Water Level Monitoring
• From: Broken Arrow
• To: DRMS
• Media Type: D
• Archive: No

Broken Arrow
Investments, LLC
801 8th Street, Suite 130
Greeley, CO 80631

December 14, 2022

Mr. Eric Scott
Environmental Protection Specialist
State of Colorado
Division of Reclamation, Mining, & Safety
1313 Sherman Street – Room 215
Denver, CO 80203

RE: Broken Arrow Investments, LLC – File No. M-2008-017 Derr Pit – Summary for December
Water Level Reporting

Dear Mr. Scott,

Broken Arrow Investments, LLC is providing this summary letter to discuss and provide information
in regard to the December off-site an on-site monitor wells and provide the dewatering volumes
pumped for November.

During the month of November a total of 0.0 acre-feet was pumped and discharged into the on-site
recharge ponds within the Derr Pit.

AgPro was able to get the normal monthly readings/measurements on all of the off-site wells for the
October readings. As discussed in our technical revision letter there are some on-site wells that
were removed due to the slurry wall construction and those wells are no longer in place. Monitor
Well 11 is no longer accessible and neither is Monitor Well 1. Some of the on-site monitor wells
saw an increase and some saw a decrease in the elevation of the water levels. The water level
elevations in the monitor wells on the Phase 1-4 portion of the pit went up on the south side by 0.11
feet and up by 0.08 on the north side. The water level elevations in the monitor wells on the upper
terrace of the permit area increased by 0.07 feet for MW-14, increased by 0.99 feet for MW-15,
increased by 0.01 feet for MW-16, decreased by 0.10 feet for MW-17, and decreased by 0.02 feet
for MW-18.

Please give me a call at [phone] or send an e-mail to discuss further.

Sincerely,

Kelly Hodge
Broken Arrow Investments, LLC