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Ms. Michelle Austin G.L. Substitute Water Supply Plan (DMG# M-80-022) March 14, 2005 I hereby approve the proposed substitute water supply plan in accordance with §37- 90-137(11), C.R.S., subject to the following conditions: Unless otherwise revoked or modified, this plan shall be valid through October 31, 2005 to correspond to the approved period of a Tri-Districts lease. If the groundwater pond has not been completely backfilled and lagged depletions to the stream system have not ceased by the plan's expiration date, a renewal request must be submitted to this office with the statutory fee (currently $217) no later than September 15, 2005. 2. A well pennit was obtained for the current use and exposed pond surface area of the gravel pit, permit no.42334-F in accordance with §37-90-137(2) and (11 ), C.R.S. 3. The total surface area of the groundwater exposed after December 31,1980 must not exceed 6.4 acres resulting in 9.7 acre-feet of evaporative loss. Total annual amount for post pumping depletions shall not exceed 1.00 acre-foot from the backfilled area. Should the total consumption at the pit exceed this amount, an amendment will need to be filed with this office. 4. Approval of this plan is forthe purpose as stated herein. Anyadditional uses for which the water may be used must first be approved by this office. 5. All releases of replacementwatermust be sufficientto coverall out-0f-priority depletions in time, place, and amountand must be made underthe direction and/or the approval of the water commissioner. The release of replacement water may be aggregated to maximize beneficial use. The water commissioner and/or the division engineer shall determine the rate and timing of an aggregated release. 6. The replacement water that is the subject of this plan cannot be sold or leased to any other entity. As a condition of subsequent renewals of this substitute water supply plan, the replacement water must be appurtenant to this site until the groundwater pond has been completely backfilled and the lagged depletions to the stream system have ceased. A copy ofthis approval letter should be recorded with the county clerk and recorder. All replacement water must be concurrent with depletions in quantity, timing and locations. The name, address, and phone number of a contact person who will be responsible for the operation and accounting of this plan must be provided on the accounting forms submitted to the division engineer and the water commissioner. Page 2