09-08-1986 Council Packet - Laserfiche WebLink

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it Page l August 4, 1986 Ms. Jeanne Mabutsh b City of Orono Sta,- Box 66 Crystal Bay, MN 55322 Dear Jeanne: Enclosed is the data requested by the Staff and the Planning Commission regarding the geothermal heating system proposed for the Wiiliam U? ^h residence. 1. DNR: Contact was made with John Fax of the DNR and the appropriate information submitted. We were issued the Appropriation and Use of Water Permit 86-6178, which authorizes the pumping and discharge of 11,000,000 gallons yearly. jVj4kiir'iG 2 PCA: Discharge application forms were cc eted and sent to Gary Kimble of the MPCA. The V.'CA is presently seeking authorization to issue a general permit program for discha „',s less than 100,000 gallons per day which constitutes a negligible envir• e:ntal impact. Per my phone call with Mr. Kimble, August 4, 1985, we have satisfied the necessary requirements, and the PCA will advise if an', hanges occur. 4'+4447-1) 3. LMCD: Cjifford Reep, acting .s our agent, has corresponded with Frank Mixa and he LM,.,D. Mr. Mixa stated that they have no jurisdiction in this area, and teels the other regulating agencies will answer any environmental concerns. The following informal ,n has been gathered from experts involved with geothermal heating systems: 1. 6 2. Average daily discharge/peak discharge (in gallons per hour), and velocity of discharge as it enters lake through perforations: These :wo :tems are explained on i' same graph and also on the information submitted by Terra —Therm, jgVilk' 14-fs E1 10 G 3. Supply line specifications — casings, size, uepth of well, aquifer tapped, effects of water table: irxktui's * I The supply of water will be taken from a private well. The well consists of 8" — 6" casing and a total depth of 322 feet. The aquifer tapped is the Prairie du Chien Jordan aquifer. Tn item #9, the well record states that static water level is 65 feet. This means water is sitting in the casing feet below land surface. Item #10 states that water 1^vel remained at 65 feec after a 20 hour period of pumping at 200 gallons per minute. Conclusion: neglible drawdown after extended pumping schedule.