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Hank Muhich City of Orono P.O. Box 66 Crystal Bay, JL 7 �OMB5-KNUTSON ASSOCIATEa'TNC. Minnesota 55323 December 8, 197, Subject: The Farm at Iona i.,ake Dear Hank: We have reviewed a revi4ed preliminary plat on the subject project. The preliminary plat included drainage easements, a dedication of 33' of rinht-of-way alone the length of Dakota Avenue, proposed drainage patterns, the locatior cf drainage structures and a centerline road prnfile. With respect to the submitt,•1s, we have the following comments: 1. Some relatively steep road qr.a-ies are provided (in excess of 7%) on both West Farm Road and North Farr.? Road. Ono could expect considerable washinv if a gravel road is proposed. We would not recommend slopes over 6* on Citv streets, but our understandinq is that the proposed streets will be private. '"he developer should strongly consider blacktoppina, but we will not require it at this time since the streets will be private. However, we do recommend that the draina:.ae ditches adjacent to the street be sodded and check dams he provided to control erosion alonq the roadway. i :'e have reviewed tillflennopin CgUnt.`.' sc,11 f?I, ps t)I'c al"e for the subdivision. Although some slopes are excessive (in excess of 12*) and some rlencoe and liamel soils are present, it appears lat each lot has ample suitablf• soil for an on -site treatment systems. 3. Hennepin County has exoressc°ri some concern relative:: to the location of the intersection of North Farm Roarl and County Road 6. The Council's approval of the prelimin,-iry stiNii-ision should be contingent on Hennepin Count 's ,:It'IIrr..i1 of the intersection. IJIM UI SitM kit %K-M$AL N16414AV. M11410 4M?LIS, MI NNESI.)TA :A411 TtLtPNQNF 461/1 tpbga ;100 12 NORTH MAIN SMUT. NUTCHINSON MINNESOTA 56JW TELEPWAI 46121 879*329 SOUTHWEST ENGINtERING DIVISION, MAMSHALL. WAINESCITA 'ASM TtLEPWAA IWII SJ2 WO