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-, iiiiiiiuiiniu iii , ..- OFFICE OF THE STATE ENGINEER Division of Water Resources Department of Natural Resources 1313 Sherman Street, Room 818 Denver, Colorado 80203 Phone: (303) 866-3581 FA%: (3031 866-3589 http!/water. state.co, usJdefau It. htm Frank C. Healy Helton & Williamsen • STATE OF COLORADO RECEIVED AUG 2 5 2000 Division at Minerals and Geology August 25, 2000 384 Inverness Dr. South, #144 ~~ Englewood, CO 80112 RE: Substitute Water Supply Plan for Midwestern Farms Resources Gravel Pit, M-93-59 NE1/4 - NW1/4 Sec. 18, T23S, R42W, 6th~P. Water Division 2, Water District 67 oQ eon ti~ p Ne ~~ r r ~ 1Bt6 ~ sill Owens Governor Greg E. Walther Executive Director Hal D. Simpson. P.E. State Engineer Dear Mr. Healy: We have reviewed your April 10, 2000 letter requesting renewal of the Midwestern Farms gravel pit substitute water supply plan for the year May 1, 2000 through April 30, 2001. The required $217 fee has been paid. Well permit no. 53050-F is currently issued to the pit itself, and permit no. 51333-F (expired) was issued for construction of a well that would be used to supply concrete production and dust suppression needs. The estimated maximum net depletion from the pit is 167.15 acre-feet per year. This level of annual depletion consists of 123.45 acre-feet of evaporative loss from 28.5 acres of ground water exposure, 23.54 acre-feet of water retained on the mined product, 12.48 acre-feet of water used in dust suppression, and 7.68 acre-feet of water used in concrete hatching. A monthly breakdown of the estimated consumption is given on the attached table. Also given on the table are the lagged depletions to the Arkansas River as both absolute amounts and as percentages of the concurrent consumption. In practice, monthly replacement water will be provided to the river based on a percentage of that month's actual consumption as determined from exposed water surface, weight of mined product, yards of concrete produced, and metered pumping for dust suppression. The source of replacement water to cover this year's depletions comes from 200.6 acre- feet of consumable water purchased from Colorado Springs Utilities which is expected to cover the pit's depletions and any evaporation, transit, or storage losses. This 200.6 acre-feet is a portion of a total of 1,264 acre-feet purchased by LAWMA for various post-1985 well users for which it administers substitute supply plans. This water is delivered into the Offset Account in John Martin Reservoir and then released to match depletions. As an additional source of long term renewable supply of replacement water Midwestern is committing to this plan 92 shares of its stock in the Buffalo Mutual Irrigation Company, which you have estimated yield an average of about 167.15 acre-feet annually. These shares will continue to be used for irrigation until they may be needed for replacement purposes.