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J. E. STOVER & ASSOCIATES III IIIIII~IIIIIIIII 2768 COMPASS DRIVE, SUITE 101 GRAND JUNCTION, COLORADO 81506 PHONE: (970) 245-4101, FAR 242-7908 MINE ENGINEERING CIVIL ENGINEERING MINE RECLAMATION CONSTRUCTION MANAGEMENT August 5, 1996 Chuck Roberts Division of Water Resources 1313 Sherman St., Room 818 Denver, CO 80203 Re: Bowie No. 2 Mine New Permit Application Permit C-96-083 pcn~i~~~D AlJ(j 0 199fi Di~is:b nOi~..~nni ~ .: ~ ~ 0::;'9~% Dear Mr. Roberts: The Division of Water Resources (DWR) letter dated March 13, 1996 to the Division of Minerals and Geology (DMG), transmitted ita review of the Bowie No. 2 Mine permit application. The DWR has a number of questions and comments which are addressed below. 1. No response required. 2. The DWR indicates that drill holes penetrating unconfined aquifers should be plugged and sealed pursuant to Rule 15.1 - 15.2 of the Water Well Contractors Rules (2CCR 402-2). On permit application pages 2.05-57 & 2.05-58, the applicant explains that exploration and monitoring holes will be sealed in accordance with DMG Rule 4.07 copy enclosed. Are the DMG rules different than the DWR's7 3. The DWR indicates that reducing sediment deposition in the Deer Trail Ditch and Fire Mountain Canal may be viewed as a negative impact because clear water can affect the seal in some ditches and cause increased transmission losses. The sediment ponds to be constructed by the applicant will reduce the sediment load from the ephemeral drainages that may flow to either the Fire Mountain Canal or the Deer Trail Ditch. The DMG and the applicant's discharge permit require the construction of sediment ponds. Since these ephemeral drainages would only be expected to flow during spring snowmelt and significant precipitation events, the benefit and or negative impact caused by the reduced sediment load from these drainages probably does not merit further discussion.