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' ' � � <br /> 2335 Highway 36 W <br /> SL Paul,MN 55113 <br /> Tel 651-636-4600 <br /> ' Fax 651-636-1311 <br /> www.bonestroo.com <br /> . �Bonestroo <br /> ]anuary 31, 2011 <br /> Ms. Melanie Curtis <br /> Planning and Zoning Coordinator <br /> City of Orono <br /> Post Office Box 66 <br /> Crystal Bay, MN 55323 <br /> Re: 875 Wayzata Boulevard—Orono Senior Housing <br /> File No. 000139-11000-1 <br /> Plat No. 11-3498 <br /> Dear Melanie: <br /> We have reviewed the plans for the assisted living and memory care facility located at 875 Wayzata <br /> Boulevard, dated]anuary 14, 2011. The plans include constructing a multi-unit building and parking lot, <br /> along with associated grading and utilities. We have the following preliminary comments with regards to <br /> engineering matters: <br /> Grading/Drainage/Wetlands/Erosion Control <br /> • Engineered design and details should be provided for the proposed retaining wall as it is over 4 <br /> feet in height. <br /> � • Plans should be submitted to the Minnehaha Creek Watershed District for review and approval. <br /> • The sand filter areas should be stabilized with fiber blanket. <br /> • See the attached Memo from]esse Carlson dated 1-27-11 regarding stormwater. <br /> • The wetland and wetland buffer submittal information is acceptable. <br /> Conservation Desiqn <br /> • The following items should be submitted for review in accordance with the City of Orono's <br /> Conservation Design Ordinance: � <br /> o A plan analysis and photographs documenting views, corridor enclosure and landmarks. <br /> o Natural resources inventory of the site: including a review of all MLCCS data pertinent to <br /> the site and a tree survey. <br /> o Conservation Design Master Plan: This should address the following topics: <br /> ■ Consideration of the existing drainage system. <br /> ■ Protection of significant tree stands and woodiands that support scenic and/or <br /> ecological goals. <br /> ■ ]ustification and mitigation of any negative impact to ecological communities. <br /> ■ Maintenance of ecological connections through site design, as shown on the <br /> Orono Natural Resource Inventory(NRI). <br /> ■ Maintenance and protection of existing positive views, and mitigation of any <br /> existing or proposed negative views. <br /> Utilities <br /> • All utility crossings should be identified and insulation should be used when vertical separation is <br /> less than two feet. <br /> • It appears that the forcemain and watermain radii shown may be too smail for directional drilling. <br /> Bends will likely be needed and are to be shown on the plan. These utilities must be located. <br />