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r III IIIIIIIIIIIII III ~ STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 1313 Sherman 51., Room 215 Denver, Colorado 80203 Phone: (3031 866-3567 MEMO TO FILE FA%: (3031 B3?-8106 Date: Thursday. November 09, 2000 /~~'V" ~~L~ w ^ ~y Specialist: Allen Sorenson Signed: l~ Gam" Subject/Operator/Operation/File No. Water Well Problems Reported by Nearby Landowner, CAMAS Co[orndo, /nc.,Coolev Reservoir & Fulton Wildlife Aren. Permit No. M-/999-034 Type of Interaction: Meeting phone Other Person(s) contacted and affiliation: Dorothy Ford, Nearby Landowner, 719/942-4587 Summary and Resolution of Interaction: DIVISION OF MINERALS GEOLOGY RECLAMATION MINING•SAFETY Bdl Owens Governor Greg E. N'alchrr Execmive Direclar Michael B. Long Divi,ion Ducclor Ms. Ford owns the land at the southeast corner of 104th Avenue and McKay Road. She reports that difficulties with her well began when CAMAS constructed a ditch to divert water away from the slurry wall construction project. The well water became muddy, and subsequently the formation in the well bore collapsed. She further states that since the slurry wall was installed, a pond has Formed on a neighbor's land. Ms. Ford hypothesizes that the construction and operation of the diversion ditch drew down the alluvial aquifer. The water table was then elevated to higher than natural levels due to mounding behind the slurry wall. She believes this fluctuation in the water levels caused her well to collapse. The well was drilled in the 1920s or thereabouts and is cased to 35 feet. The well itself is reported to be several hundred feet deep. Given the age of the well it is likely that it is not sealed from the alluvial aquifer or surface water. Ms. Ford reports that CAMAS has been contacted, that they inspected her well and told her that their activities did not cause the well to collapse. She believes that it is too great of a coincidence that her previously problem free well collapsed at the exact time of the slurry wall operation. She stated that CAMAS had at one time offered to monitor the well prior to and during operation of the gravel pit, but that CAMAS never followed-up on the offer. In a brief review of the file, I determined that CAMAS has committed to a ground water monitoring plan and to provide results in the annual reclamation report. The first annual report was submitted 9/19/00, but does not include any ground water monitoring data. I told Ms. Ford that if she wrote a letter describing her situation, that we would schedule a high priority inspection to be conducted within no more than 30 days, and would investigate the matter. Ms. Ford no longer lives on the property at 104t'' and McKay, but gave her permission for the Division to access the property and inspect the well pit, etc. She stated that the old farmhouse on her property had burned down and there is now a mobile home on the land. cr. Carl Mount, DMG