06-21-2010 Planning Commission Packet

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� r PC Exhibit I 2335 Highway 36 W St.Paul,MN 55113 Tel 651-636-4600 Fax651-636-1311 www.bonestroo.com �� Bonestroo June 1, 2010 � • Ms. Melanie Curtis ' r , Planning�and Zoning Coordinator �� City of Orono . Post Office Box 66 � Crystal Bay, MN 55323 ' , Re: 875 Wayzata Boulevard—Ecumen Senior Living File No. 000139-10000-1 � Plat No. 10-3472 Dear Melanie: We have reviewed the preliminary pians for the assisted living and memory care facility, located at 875 Wayzata Boulevard. The plans include constructing a multi-unit building and parking lot, along with associated grading and utilities. We have the following preliminary comments with regards to . engineering matters: Grading/Drainage/Wetiands/Erosion Control ' • Engineered design and details should be provided for the proposed retaining walf as it is over 4 feet in height. • A current and approved wetland delineation report should be submitted for review. • Pians should be submitted to the Minnehaha Creek Watershed District for review and approval. • Storm sewer drainage areas and calculations should be submitted for review and approval. • More details, including a typical section and plantings should be provided for the rain garden. • More details, such as spot elevations, should be provided in the area between the building and the retaining wall to indicate how this area will drain. • Temporary and permanent erosion and sediment control plans should be submitted for review and approval. Utilities • A Utility Plan sheet should be provided. This should show all sanitary sewer, watermain and services. Plans should include plan and profile views for all proposed sanitary and watermain. In . • addition, all utility crossings should be identified and insulation shouid be used when vertical separation is iess than 2 feet. • This site will require sanitary sewer lift station. The lift station design should be submitted for review. Streets " • A geotechnical report, R-value recommendation, and pavement design should be submitted for review and approvaL • A plan and profile should be submitted for the driveway. • The driveway access should be regraded such that a 50 foot landing area with a slope of no greater than 2% is provided at the access from Highway 12. • City code requires that all private streets that serve more than seven units be paved to a minimum width of 28 feet. The proposed driveway width of 24 feet does not meet this standard. City stafF and Council should review the implications of the proposed narrower street. • Plans should be submitted to MnDOT for review and approval. • Plans should be submitted to Hennepin County for review and approval. • Plans should be submitted to the Fire Marshal for review and approval.