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STATE OF OFFICE OF THE STATE ENGINEER Division of \Nater Resources Department o(Natural Resowces 1313 Sherman Street, Room 018 Denver, Colorado 80203 Phone 13031 866-3581 FAX (3031 0663589 December 14, 1995 Suzanne L. Benton, County Administrator Rio Grande County P.O. Box 396 Del Norte, CO 81132 RE: Maxeyville Pit, DMG No. M-78-068 NE7 /4-Sec. 24, T39N, R7E, NMPM Sanderson Pit, DMG No. M-78-069 NE1 /4-Sec. 16, T39N, R7E, NMPM Del Norte Pit, DMG No. M-78-071 NW1/1-Sec. 20, T40N, R6E, NMPM 374 Pit, DMG No. M-87-020 SE1/4-Sec. 21, T40N, R6E, NMPM Dear Ms. Benton: COLORADO oc coy ~.i-mop 0 ~~~~ U° Rny Rumer Grnernur WmesS Lrxhhead 6eati.e Director Hal D, $impwn S~aie Engineer have received your letter dated December 6, i 995 concerning the above referenced gravel pits, along with attached aerial photographs of two of the pits. Your letter was apparently in response to my previous correspondence requesting documentation as to the pre-1981 existence and size of the pits, and/or submittal of applications for well permits and substitute water supply plans, I regret that your submittal is inadequate. I will address each pit separately. Maxevville Pit. M-78-068 The July 27, 1978 and August 29, 1989 aerial photographs do appear to document that the size of the pit did not increase over that period. However, the number of exposed acres ground water was not given. Please provide this number and a statement that the exposure has not increased since 1989. Sanderson Pit. M-78-069 The July 27, 1978 and August 9, 1990 aerial photographs show an increase in exposed ground water from less than 1 acre to over 4 acres. As this pit is active, lacking additional evidence it would appear that the amount of exposed ground water did increase since December 31, 1980, and a well permit and a substitute water supply plan are required. Del Norte Pit, M-78-071 No evidence has yet been provided as to the amount of pre- vs. post-1981 ground water exposure.