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` • III1111111111111111 ~ A. R. PFEIFFENBERGER AND ASSOCIATES BUSDYEBS - ENGINEERING CONBUI.TANT9 Z03 365-2902 Mr. James L. Schmieding Reclamation Specialist Mined Land Reclamation 723 Centennial Building 1313 Sherman Street Denver, Colorado 80203 Dear Jim: 1760 OII.PIN 6TREET DENOER, COLORADO 80218 December 14, 1979 ^--r- - -- GCS 1 1~~~ Colo. De, t :,; ._,,~, ,, . ~. Re: Superior Sand & Gravel - Aurora File #79-189 In response to your letter of November 30, 1979 to Superior Sand and Gravel Co., Mr. Keith Merilatt has requested that I address the statements made in the memorandum from Dr- Jeris Danielson of the Division of Water Resources regarding their review of the application report filed with the Colo- rado Mined Land Reclamation Board for a Mining and Reclamation Permit. We are happy to submit the following additional information to supplement the water information presented in Exhibit G of our report. The application for anon-consumptive commercial well permit was submitted to the State Engineer's office in September after rezoning of the site had been approved by the Arapahoe County Board of Commissioners. The basis for the "non-consumptive" request was a result of a discussion with Mr. Stephen Hart of the Ground Water Section on March 14, 1979 at which time the use of the process water required to wash the sand during screening and grading was explained along with the approximate quantities involved in the system. We were advised that if evaporation from the system was a small percentage of the annual amount pumped, the well could be recognized as a "non-consumptive" welt, but if consumption by the system was a significant percentage of the annual amount pumped, augmentation would be necessary. A consumption of 0. 9°fo or 3. 1 acre feet was judged to be small and an application for anon-consumptive permit was filed without a plan for augmentation. We are inclosing a copy of the application and letter of submittal for your perusal. To date there has been no response to the well permit application othet' than the reference in the memo that it may be denied.