Septic design/info - Laserfiche WebLink

Home Browse Search

. U TO: Jeanne A. Mabusth, Zoning Administrator FROM: Michael P. Gaffron, On Site Manager DATE: June 15, 1983 � SUBJECT: Proposed Subdivision for Willow Properties, Gary Peterson - Soils and Site Investigation , Review ' I I have reviewed the ten proposed lots and wish to make the � following comments: Based on the Hennepin County Soil Survey, soils on this property include Lester loams and clay loams, Hayden loams, Hamel loams and LeSeur loams, as well as a good deal of marsh. Tested sites are located on the higher, better-drained soils. Some areas of sandy soil were reported on the most easterly lots. Based on the soils and water table data submitted, shallow trench or standard trench systems appear suitable for all lots. Following is a summary of the soils data for each site: Lot 1 Block 1 - Percolation Rate Average 22 MPI both sites - Primary site - slope 50 - mottling at 3 . 5' - water table at 3 .5 ' - modified shallow trench system* Maxi.mum Trench Depth 6" into original soil - Alternate site - slope 8� - mottling at 4 . 0 ' Water table at 4 .9 ' - shallow trench system - maximum � trench depth 12" into original soil Lot 2 Block 1 - Percolation Rate Average 18 MPI both sites - Prim�.ry site - slope 70 - mottling at 4 . 2 ' , 5 .0 ' - water table at 4 .5' , 5• 5 ' - shallow trenches - Maximum Trench Depth 14" into original soil. - Alt�rnate site - slope 8� - mottling at 3. 3' - water table at 3 .3 ' - modified shallow trenches* - maximum trench depth 4" into original soil Lot 3 Block 1 - Percolation Rate Average 23 MPI both sites - Primary site - slope 10� - mottling at 4 .0 ' , 4 .5 ' - water table at 4 .0 ' , 5.5' - shallow trenches - maximum trench depth 12" into original soil - Alternate site - slope 8� - mottling at 3 . 5 ' - water table at 3 .6 ' - modified shallow trenches*- Maximum