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's' r'- > Zoning File 11693 October 16r 1991 Page 3 4. A brief review of the drainfield Infor^ition Indicates that all sites will likely require mound systems* and that there is very little flexibility in finding additional septic sites or revising the locations of the sites shown on most of the lots. In some cases those sites meet the MPCA/DNR 10* lot line setback standard* but not Orono's current 20' requirement. Topography and hou^e positioning also limit the flexibility of the drainfield sites. Most of the sites are shown sized for a 4*5 bedroom mound system* but may not be expandable. In both Lots 2 and 5* there are likely to be driveway conflicts with the drainfield sites. The proposed house site on Lot 2 would be so 'restricted by the 100* shoreline setback and 20* drainfield setbacks that in staff's opinion this is not a reasonable lot. Lots 3* 4 and 5 are more flexible. Although no testing has been shown for Lot 1* the existing septic system appears to be functional and there appears to be substantial area available south of the house lor replacements. An alternate site should be required to be tested as part of this subdivision. 5. The wetland in the northeast quadrant of the property is about 2* above and not connected to the Tanager Lake wetland. The normal 26* wetland setback for structures and 75* setback for drainfields would apply. It appears that the proposed roadway will encroach on the 26* wetland setback on both sides of the road* hence a conditional use permit and variance appears to be required for that road grading and filling in the wetland. 6. In Lots 3 and 5* it appears possible that driveways may encroach into 26* wetland setbacks* in order to avoid encroaching on septic sites or lot lines. 7. Each lot contains at least 2.0 acres of contiguous dry buildable land. 8. Lots 2 and 4 do not meet the 200' width standard at the 50* street setback* but do meet a 200* width at the proposed 100* setback from the 929.4 contour line. Lot 1 with the existing house* does not have 200* at the shoreline. The Orono Lake Use Committee has suggested that for "lakeshore lots** setbacks be measured at the shoreline and at the required lake setback line* but not at the street setback line. -r ► '.V' H'-, i- • .