2003-P06826 - septic - Laserfiche WebLink

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' 333 East Main Street � P.O.Box 388 ' �� Elk River, MN 55330 � , k., ,,., ,_;.. .. (763)441-7509 " ��-��=� S�YjS�TjEMS (800)554-7509 � �--� Fax:(763)441-9176 ��o�rsi�th�s Er��wEEawG,�Nc , e-mail:h2olab�lkdllink.net ' November 26, 2002 ' Gerald Walsh 16950 N. Manor Road �� Eden Prairie, Minnesota 55346 ��p�� M�� ' �Uti�11T�S TNtS DES{�M. ' Subject: Onsite Wastewater System(OWS)Design 1. Le�al Description - 180 Big Island, City of Orono, Hennepin County, Minnesota. ' 1 2. Site Conditions - The /2 acre lot is located on an island of Lake Minnetonka with a proposed cabin, ' grivate well and OWS as depicted on Figure 1. The proposal is to_construct a two bedroom, single family residence with an OWS located on Figure 2. ' Percolation tests were not performed due to winter weather conditions. The system will not be installed until spring/summer 2003; percolation tests will be performed priQr to the installation and results submitted to the City of Orono prior to installation. ' The proposed primary drain field site is loca.ted on a convex shoulder slope of 0-2%. The entire building site is located on a knoll approximately 20-30 feet higher in elevation than Lake Minnetonka. ' 3. Soil Conditions— The Hennepin County soil survey, completed in the early 1970's, mapped the soil within the area of this property as a Hayden Series. A copy of the Hayden Series description from the , soil survey is included in Appendix A. The soil survey described the Hayden Series as a deep, well- drained, loamy soil formed in glacial till with the depth to water table greater than 5 feet in all seasons. ' A discussion with the Natural Resource Conservarion Service (NRCS) soil scientist who recently completed the Hennepin County soil survey update (not available for distribution) indicated the Lester Series has genera.11y replaced the Hayden Series in the updated soil surveys. The Lester Series is the , Minnesota state soil and is very common in Des Moines Lobe glacial till deposits of central Minnesota, specifically Wright and Hennepin Counties. ' A copy of the descnption for the Lester Series, completed for the Wright County soil survey update, is included in Appendix A. The soil survey indicates the soils in the Lester Series are very deep, well drained loamy soils formed in glacial till with relict redo�cimorphic features. The percolation rate of the ' soil ranges from 10 minutes per inch to 40 minutes per inch. Our own soil test pit logs and soil borings closely matched the soil survey description(see Appendix A). , '