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-#iqA" 36 ` i (sto b Bonito, P E Le rence F Feldslen, P.E Robert N' Roseme. P.E Glenn R. Cook, P.E. 81 /�aNt(j, Mlnaadoia 55113 loteph C Anderlik PE Keith A. Gordon. P.E Piiewa: 636-4600 B,d&ord A. Lem lwlt P L. Thomas E Noyes P.E. Robert D Frtjeerd P F Rlrhard W Foster. P.E March 8, 1978 Mr. Henry Muhich Zoning Administrator City of Orono Box 66 Crystal Say, Minnesota 55323 Re : The Farm at Long Lake - No. 317 Our File No. 139 Dear Hank: Ruhard Erune. P r Janes C. nllom. P t. Robert G Schswkks, P.E .He,,tm L. SoPrWe, Pl. Donald C awredt. P.E Kenneth R Mettler. P.E Charles A Erickson :.to M Pawelsky Herten M. Olson V i'LAAGS U i ORONG Mr. Timothy Adams delivered to our office a copy of the design street grades and drainage calculations for the Farm at long Iake plat, prepared by Clark Engineering. Mr. Adams also delivered a copy of Al Olson's letter dated 21 Dec. 1977, listing items required for final approval, a copy of the plat over an aerial photo at the scale of 1"-200' and Section I11, paragraphs A and 3 of the "Rider to Purchase Agreement" outlining certain development procedures. Our office was not involved in the original review of the proposed plat. Therefore, we are unfamiliar with any previous considerations that may have taken place, and our review is based on the information made available to us at this time. Mr. Adams indicated to us that it is intended to maintain a strong rural atmosphere within the development and that West Farm Road and North Farm Road are to be developed as narrow rural driveways. Indeed, the "Rider to Purchase Agreement" indicates that the grav<<1 base is to be 14 feet in width and that the bituminous surface is to be 10 feet in width and that the westerly 600 feet of West Farm Road is to he left in a gravel condition. We have made a review of the plat and offer the following comments and recom- mendations for consideration: 1) Street Grades - the street grades prepared by Clark Engineering are at the maximum gradients considered acceTtable for residential streets with the exception of the east end of West Farm Road which has a gradient of 10%. There are four proposed lots at the end of this gradient and we recormuend that this grade he flatened to not exceed an 8% slope. 2) Street Width - We have very serious reservations about streets (or driveways) that are 1,000 feet and 1,200 feet long and are only one lane wide. There are a number of vertical and horizontal curves in the proposed layout which, in our ,judgment, presents very restricted sight distance for on -cowing vehicles. This restricted sight distance introduces significant safety hazards which are further aggrevated with snow banks on each side of the roadway during Page I.