1990-03-30 Memo, Septic System Design

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To: Jeanne A. Mabusth, Building & Zoning Administrator From: Michael P. Gaffron, Asst Planning & Zoning Administrator Date: March 30, 1990 Subject: #1519 Fullerton Properties - Willow Drive/County Rd 6 Sketch Plan - Septic Concerns I have transferred the soil survey information to a coot' of the proposed plat, and would make the following preliminary coEamff s on the west half of the site are mainly LeSueur pes generally 6$ or less and water table generally than 3' below the surface. The lots designated as and 3, BlockX?and Lots 1 and 2 of Block.2;� have ial areas of LeSueur loam and probably will find sites for mound systems. 3 and 4, Block .2' contain areas of Kilkenny and Lester clay loam soils which generally are a little heavier clay soils. Again, these lots would probably require mound systems and both appear to have some area of acceptable slopes. 3. The existing farmstead in Lot 5, Block,2'(2225 Sixth Avenue North) has one 1,000 gallon pie -cast concrete tank west of the farm house, and drainf'eld that is unknown. Notwithstanding concerns about drainage through the west end of this lot, there may be suitable expansion sites west of the house. The higher ground on which most of the buildings are located is a Hayden clay loam, often requiring mound systems due to slow perc rate, with the areas west of the house appearing to be a Glencoe silty clay loam which often precludes the use of any system. I 4. Lots 6, 7, 8 and 9 of Block Jl contain substantial areas of Glencoe soil which often has water table at the surface during the wet season. Lots 6 and 7 would appear to have a drainageway from the north bisecting these lots into a front and rear portion. Lot 6 may have some mound sites on the fringes of the Glencoe at the front or rear of the lot. Lot 7 will have an extremely difficult time trying to find dr -infield sites that are more than 75' from the designated wetland area. Lots 8 and 9 are also quite low, containing mostly wet soils. These two lots might find suitable mound sites near the road, probably ending up in front yard areas. Both Lots 8 and 9 have a number of drainage concerns, as they are the receiving area for overland flows from the west.