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Mr. Henry Muhich March 8, 1978 City of Orono Box. 66 Crvstal Say, Minnesota 55323 Re: The Farm at Long Lake - No. 317 Ou- File No. 139 winter. Mr. Adams indicated to us that "passing lanes" would be instilled at critical locations along the roadway. We recorw nd that the private streets be a minimum of 20 feet in width with a prefered width of 24 feet. 3) Access - We recommend that no direct access be allowed to Co. Rd. b from lots 1, 8, 9 and 10, and that no direct access to Brown :toad be allowed from lot 11 and 23. A driveway easement for lot 20 is indicated between lots 19 and 21. Thts driving access intersects West Farm Road just below the crest of a bill and care will have to be taken to provide proper sight distance. 4) Drainage and Wetlands - The drainage calculations prepared by Clark Engineering appear reasonable. The Stores Water Management Plan indicates 5.4 cfs as the 100 year outlet flow from Dickey Lake (Brown's Lake) while Clark's calculations indicate a 1.4 cfs as the 10 year outlet flow. The sug- gested 24 inch CMP culvert under West Farm Road appears adequate and is recom- mended. The street grade plan did not include a cross-section of the proposed streets, but it is presumed that there will I ainage ditches along the roadway. With the very steep slopes involver re is a very high potential for erosion within the ditches which could cau,.% siltation of the wetlands and/or Long Lake. We recommend that the De•e ioper submit specific detailed erosion control plans prior to start of any grading or construction. A conservation and flowage easement is required over parts of lots 5, o, I, 1.6 and 17, cased on examination of the half -section aerial photographs. The easement outlined on the plat supplied by Mr. Adams does not appear to follow closely the actual wetland area indicated in the aerial photo. The drainage easements are adequate as shown. 5) Soils - The Soils Development Guide, X-ap No. indicates Hayden, Lester, Erin, Glencoe and Hamel soils across the -proposed subdivision. There are also areas of steep slopes. We recommend that acceptable evidence be submitted for each proposed lot indicating; that there is at least one primary and one secondary area for drainfield facilities. 6) Maintenance - A pasture easement is indicate,'. on the proposed plat. A clarification of the use of drainage easements and .•onservation and flowage easements for pastk,-e purposes should he made. We rvcLxmX,nd that responsihilitr and obligations of each lot toward the roadway and any com- on easements be in written form. accepti.hle to the City Attorney, prior to approval of the suh - divisior. Very tri,ly y BONESTRO0, RS►-JAE�(,ANDERLIK 6 ASSOCIATES, 1.*:. earn mlso CO:kf cc : Mr . Timothy Adana Page Z.