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1 J U D I T H L H A M I L T O N Consulting Geologist and Engineer ~ G R O U N D - W A T E R A N D E N G I N E E R I N G G E O L O G Y 2220 Julian Street Denver, Colorado 80211 (303) 477-6610 July 24, 1992 ~ Mr. Bob Fleming ADCU Consulting 2050 E. 104th Ave. Suite 300 Thornton, CO ~ Dear Bob: As you requested, I reviewed the staff report from the Planning Commission Hearing for Sand Creek Farms application for condi- tional use for sand extF.action in the Bijou Creek drainage (Case No. 046-92-C1• Concerns of the staff included possible • adverse effects to neighboring well owners and water supply for washing and dust control. The site is located in the SEy of Section 3, T3S, R61W. The S#ate Engineer's Office list of registered wells in the area - shows that all wells in Sections 2, 3 and IO are irrigation wells. There are two irrigation wells located in Section 11, and also • - two stock sells. A windmill is shown on the topographic map in the NEg of Section 10, It is probable that this is a stock well but is not registered. The list of wells is attached. If no mining of sand occurs below the water table, there should be no adverse effect on existing wells. ~ Since there are no wells listed under the ownership of Sand Creek Farms, the wells which might be used for water supply to the pro- ject are not known. The SEO list shows one well located in the SE$ of Section 3. Owner is William Vanmetre. The well is located in the SWySE~ and is 117 feet deep. Reported water level is 40 feet and reported yield is 800 gal/min. • If this well is to be used for the mine, an application for change of use will need to be made. A make-up supply for consump- tive use will also be required. Presently, the State assumes that 4;6 by weight of sand and gravel removed will be consumptive use for washing operations. Make-up water for consumptive use • for dust control will also be necessary. ~• ~•