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�� /� <br /> PC Exhibit O <br /> 2335 Highway 36 W <br /> St.Paul,MN 55113 <br /> Te1651-636-4600 <br /> . Fax 651-636-1311 <br /> www.bonestroo.com <br /> May 7, zo�o �'Bonestroo <br /> Melanie Curtis <br /> Planning and Zoning Coordinator <br /> City of Orono � <br /> Post O�ce Box 66 <br /> Crystal Bay, MN 55323 <br /> Re: CommonBond Communities <br /> File No. 000139-10000-1 <br /> File No. 10-3460 <br /> Dear Melanie: <br /> We have reviewed the plans for a proposed townhome development at east end of Fire Station <br /> Drive. The plans are dated 4-21-10. We have the following comments with regards to <br /> engineering matters: <br /> • On sheet C200 Keyed Notes, replace references to Long Lake's standards with Orono's. <br /> • The plan should be reviewed by the Fire Marshall for accessibility. <br /> • The plan should show perimeter drainage and utility easements 5-feet wide along all <br /> interior lot lines or adjacent to platted properly with existing easements and 10-feet wide <br /> along the exterior lot lines. <br /> • The pond high water level and noted emergency overtlow elevation and location need to <br /> be reexamined. As designed, the pond first overFlows back through the storm sewer at <br /> CB 15 over the end of the road. <br /> • This project will disturb more than 100 CY of material triggering Orono's erosion controi <br /> ordinance. City code requires that an erosion control financial security be submitted in <br /> the amount of 125% of the estimated cost to accomplish compliance with the SWPPP. <br /> The estimated cost for the project is$8,000 and the required security would then be <br /> $10,000. This includes silt fence re-installation, site seeding, and maintenance of catch <br /> basin sediment protection devices. <br /> • Please see the attached memo dated 5-7-10 from Phil Elkin regarding additional <br /> stormwater comments. <br /> • Please see the memo dated 5-7-10 from]ohn Smyth for wetland comments. <br />