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TO; <br />FROM: <br />DATE: <br />SUBJ: <br />Planning Commission <br />Michael P. Gaffron, Assistant Zoning Administrator <br />April 17, 1986 <br />#1019 Ralph D. Martinson, 2525 Woodhaven Drive - <br />Preliminary Subdivision <br />Zoning District - RR-lB 2-Acre unsewered <br />Application - Divide 4.27 acre lot into 2 lots of 2.14 and 2.13 <br />acres respectively <br />List of Exhibits - <br />A - Application <br />B - Plat Map <br />C - Property Owners List <br />D - Survey <br />E - Topographical Survey with staff notes <br />Background <br />The plat of Woodhaven was created in 1377-78, just prior to the <br />passage of Ordinance 210 which subsequently required septic <br />system soil testing for all newly created building lots. Only a <br />few of the lots on Woodhaven were tested, at the developer's <br />initiative. However, the City did request soils information from <br />the Hennepin County Soil Conservation District, who subsequently <br />submitted a "soils detail" of the 22,5 acre site. This detail <br />map indicated that proposed lots 6 & 7 were mostly Hamel loam <br />soils, generally not suitable for drainfield systems, which <br />resulted in Lots 6 & 7 being combined as one lot subject to <br />possible future subdivision under unspecified conditions. <br />Soils Information Review <br />The soils detail provided by Hennepin County Soils Office in 1977 <br />does not match with what is shown on the Hennepin County Soil <br />Survey, and subsequent soil borings by at least 3 independent <br />sources indicate that the area shown and relied upon as Hamel <br />loam soil in 1977 really is something different. The soil has <br />not changed, but realize that the 1977 report was admittedly <br />prepared without the benefit of soil borings in the field and <br />remained to be verified. <br />The Hennepin County Soil Survey shows areas of Dundas, LeSeur, <br />and Hamel soils on the property, all soils with relatively high <br />water tables. Again, borings in the field have shown this map to <br />be somewhat inaccurate on a lot-by-lot basis. The soil survey <br />does not purport to be extremely accurate on this small a scale <br />and it is always recommended that actual field verification <br />should be relied upon more heavily in evaluating the suitability <br />for septic systems.