04-14-1986 Council Packet - Laserfiche WebLink

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r r� � �'� r. •fin TO: Orono City Council. r'ROM: Michael P. Gaffron, Assistant Zoning Administrator DATE: April 11, 1986 SOBJ: Request by VanEeckhout Building Corporation for Sewer Connection - Property north of Long Lake Bank, east of North Brown Road NOTE: This letter of request arrived while Mark Bernhardson was on vacation and he has not had a chance to review it, hence I am including it as an information item only. The property in question is a parcel of about 140' x 1150' or 3.9 acres, of which approximately 2.8 acres is dry buildable. The property is adjacent to the City of Long Lake, and is adjacent to the VanEeckhout townhouses, with a sewer manhole available about 25' from the south property line (see topographical survey). Based on the location of the sewer so close to the property, and based on the potential problems with slow -perking clay soils and some steep slopes, VanEeckhout felt there would be a good case for connecting this property to the sewer. In my meeting with VanEeckhout and his site evaluator on the site on March 21., I concurred that indeed there appeared to be potential problems in locating a primary and alternate septic system on the property, and if they could document the infeasibility of using an on -site system, the sewer connection might be looked upon more favorably by the Council. Documentation submitted to date includes: A. Letter of request dated 4/7/E;6 - VanEeckhout makes 5 points: 1) Septic systems are more prone to failure than sanitary sewers (this is a "given"). 2) Impermeable soils on the site (alluded to by site evaluator, but sites have not been perc-tasted). 3) Steep slopes (perhaps the best argument for allowing sewer connection to this property). 4) Practicality (due to existing old foundation locations, the second or alternate site for a system would be 650' from the proposed home site). 5) Potential for a future subdivision (this seems remote with only 2.8 dry acres in a 2 acre zone). B. Letter from Steve Shirmers, MPCA Certified Site Evaluator. This letter documents the shallow depth to zones _)f seasonal saturation inferred by soil mottling, which would require use of a mound system. Mound systems cannot in any event be used where slopes exceed 12%, and only can be used on slopes of 6-12% when the perc rates are 1/2 - 30 minutes per inch, according to Orono's existing codes. Although perc testing has not been done, the soils found by Shirmers would likely have slower perc rates than are desirable for a mound on steeper slopes.