07-16-1990 Planning Packet - Laserfiche WebLink

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Zoning File #1526 May 18, 1990 Page 2 of 4 In preliminary discussion with the City Engineer, typically, when a wetland interacts with the adjacent lake such as in this case, the wetland is to be designated at the 931.5' elevation (100 year flood elevation of Lake Minnetonka). The preliminary plat survey must confirm that each building site has at a minimum 1/2 acre dry contiguous land. Applicant may seek credit for wetlands areas as property is sewered. Drainageways that drain to the wetlands within the property via the culverts under Old Beach Road, Shadywood Road and Shoreline Drive must be designated as drainage easements as they flow through lots to wetlands to north and eventually to Lake Minnetonka to the northeast. Access - Staff and City Engineer have reviewed the lots for access purposes and find no concern for lots along Old Beach Road. The City will ask that Lots 8 and 9 share access, somewhere in the neighborhood of the shared lot line, probably where partial drive has been created to lift station on Shadywood Road. It is staff's understanding that Lot 9 is to be acquired by the Fresh Water Biological Institute. If this is the case, access will be provided via the adjacent northern property. Applicant should provide further direction as access to Lot 8 must be defined. The Engineer also asked for the upgrading of Old Beach Road. The City of Minnetonka Beach and the City of Orono should work together to determine what standards/criteria shall be used for the upgrading. The City will ask for the dedication of right-of- way for Old Beach Road as shown on sketch plan. In addition, the County will also review the plat for potential acquisition of right-of-way. Grading/Drainaqe - The subject property was once used to receive spoils from a suction dredging project within Lafayette Bay. The spoils were not placed within the wetlands but were located in the higher elevations. Based on the map locating that area (Exhibit F), it would appear that more than just Lot 4 was involved with the fill, but appears to involve Lots 3, 4, 5 and possibly parts of 6. Applicant's preliminary plan must locate the fill area. This kind of information will be useful for the building staff in determining what lots will be required to provide soil borings. The City will also ask that the basement elevation of each residence be located on each lot. Applicant's engineer is advised to review the sewer as-builts within Old Beach Road. Applicant should provide a drainage study/map of the property. The engineer should locate all drainageways that enter the property along the southeast and north sides to determine impact, if any, upon dry buildable envelopes. V 1