06-16-1997 Planning Packet - Laserfiche WebLink

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1 Zoning File #1619 February 14, 1991 Page 7 Lob 1 — the dralnfield sites are located on a relatively flat area at the north half of the lot. These sites are about 18* vertically higher than the major wetland to the west, and are located on slopes ranging from 2 to 6%. These sites force the house to be located in the south half of the lot at the edge of the 40% slope leading down to the wetland. The house location further north on the lot would leave minimal setbacks to the mound systems and require that a driveway be constructed along the 40% slope, leaving a major cut just downhill from the primary site. Because of the steep slopes and location of septic systems, this lot is severely limited to a single buildable envelope being approximately 175* in length and ranging in width from 50* to 90*, the Planning Commission and Council allow a 30* setback from the east lot line of Lot 1. Lot 2 - has drainfield sites centrally located just north of the small pond. The primary site ranges in slope from 4% in the south end to near 9% at the very north end. The alternate site just to the west averages 6% slope. These sites are located immediately uphill from the proposed house site. Due to this, and coupled with a drainage swale from the pond being located on the west side of the house, plus the 50* rear setback requirement, this is at best a very poor building site with drainfield sites that are marginal due to site topography. A further issue with Lot 2 is that an extremely long driveway will have to be constructed to reach the proposed house location. If Outlot B is allowed as a private drive way, the actual driveway length from the proposed house site on Lot 2 to the point of access on Lyman Avenue is 650*. The State Fire Code will likely require that the driveway be provide with a turnaround, and be not less than 20* unobstructed width, hence this will make a shared driveway on Outlot. B just that much tougher to construct. Lot 3 - contains the existing house which has an existing failing septic system. Both the primary and alternate drainfield sites have been tested on this property. The primary site has a slope of approximately 2%, the alternate site has a slope of about 6%. With approximately 40* between the easterly tip of the primary mound and the east lot line, it might be feasible to relocate the driveway within Lot 3 to a point where it could access Lyman Avenue within the boundaries of the plat, eliminating the need for a driveway easement on the neighboring property. However, the sight distance for Outlot B's access point to Lyman Avenue is already minimal if not unacceptable, hence an additional access at that location may not be a wise decision.