Agenda - Council - 08/27/1985 - Laserfiche WebLink

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1C Hakanson Anderson Associates, Inc. 222 Monroe.Sireet, Anoka, Minnesota 55303 Eugene J. Hakanson, P.E 6121427.5860 James M. Winter, R.L.S. engineers and surveyors Lawrence G. Koshek, P.E. Peter R. Reatikka, P.E. July 31, 1985 Mr. David E. Hansing, P.E. DeWayne C. Olson Consulting Engineers, Inc. 1611 Highway #10 N.E. Minneapolis, MN 55432 Re: Rum River Hills Dear Mr. Hansing: We have reviewed the plans and specifications for the drainage and streets in Rum River Hills and offer the following comments: 1. The proposed grading plan did not show any lot grading. The lots along 169th Avenue N.W. will require filling to make them build- able in accordance with the City Code. 2. No cross sections or a typical section were provided. 3. No intersection radii were shown on the plans. The City Code requires the radii on suburban streets to be 20 feet and the radii on rural streets to be 30 feet. 4. The radius on the Iodine Street cul -de -sac is shown as 46.5 feet. City Code requires a radius of 50 feet. 5. The drainage from the low point at station 1 +50 on Iodine Street has not been addressed on the plans. 6. The drainage from the low point at station 6 +00 on 169th Avenue N.W. has not been addressed on the plans. If Lots 4 and 5, Block 1, are to be used as holding ponds, drainage calculations should be provided to make sure they are adequate to handle a 100 year storm without flooding adjacent properties. Lots 4 and 5, Block 1 were approved on the plat as buildable lots, therefore, any change in the status of the lots must be legally resolved. The City Council will also have to approve the change in status of the lots. 7. Sheet four indicates four -inch subgrade drainage pipes. The type of pipe and bedding material for these pipe should be specified. 8. The specification provides logs of four soil borings. A location map of the borings should be provided. civil a municipal a planning a soils a lmul surrel'okc 0 landscape architecture 17