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K N+l ./L�\i AND ASBOOIATES, INCORPORATED ENGINEERS ARCHITECTS PLANNERS 25M AMERICAN NATIONAL BANK BUILDING SAINT PAUL. MINNESOTA 55101 51=92d 00 FAX 512292.0055 February 1, 1990 Honorable Mayor and City Council Lake Ehno, Minnesota Re: The Forest PRD Lake Elmo, Minnesota Commission 9150-000 Dear Mayor and Council: At the September 26, 1989 Council Meeting, approval of the Development Stage Plan was postponed because Lots 7, 8 and 9 did not have at least one (1) acre of land suitable for septic system purposes. The soil was suitable but the drainage easement established by the VBWD at elevation 917 occupied the western portion of the lots. The developer has proposed to fill out into the drainage easements to achieve the one -acre of high ground ( see attached sketch). This method is acceptable to VBWD as long as the filling does not raise the flood level by more than 0.1 foot. The revised preliminary plat shows a revision in the road alignment at the west end of the plat which was not requested by the City. Evidently, the developer changed the relatively straight road to one that has two sharp reverse curves just before the cul-de-sac in order to save some significant trees. The sharp back-to-back curves would only allow a safe speed of 15-20 mph. In our opinion, this would create a hazardous condition and should not be approved. The road alignment should more closely conform to the preliminary plat previously reviewed by the City dated September 26, 1989. Recomtnendations: Achieving one acre of high ground by filling is acceptable. The proposed road alignment at the west end of the plat is not recommended because of the hazardous condition created. Local roads should be designed for a safe speed of 30 mph. It is recommended that the Development Stage Plan, with preliminary plat dated January 8, 1990, not be approved. Sincerely, Larry D. Boluer, P.E. LDB/nrha Attachment