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PC Exhibit FII <br /> � 2335 Highway 36 W <br /> , St.Paul,MN 55113 <br /> Te1651-636-4600 <br /> Fax 651-636-1311 <br /> www.bonestroo.com <br /> April 30, zo�o �Bonestroo <br /> Melanie Curtis <br /> Planning and Zoning Coordinator <br /> City of Orono <br /> Post Office Box 66 <br /> Crystal Bay, MN 55323 <br /> Re: 3980 Cherry Avenue <br /> File No. 000139-10000-1 <br /> File No. 10-3462 <br /> Dear Melanie: <br /> We have reviewed the revised grading plan for the proposed house at 3980 Cherry Avenue. The <br /> plan is dated 4-2-10. We have the following comments with regards to engineering matters: <br /> • The proposed contours should tie into the existing contours. There are several existing <br /> contours that are not tied into the proposed contours. <br /> • The maximum acceptable grade of 3:1 is exceeded northwest of the proposed home. <br /> • The plans should show top and bottom wall elevations for all retaining walls. <br /> • Engineered design and details should be submitted for review and approval for all <br /> retaining walls over four in height, and for all tiered walls with a separation of less than <br /> two times the wall height. <br /> • More information should be provided for the proposed sewer service. These details <br /> should be provided to public works for review. <br /> • Although the grading plan adequately addresses the emergency overFlow for the <br /> backyard, we do not recommend maintaining the existing closed drainage basin. <br /> • This existing low area should be investigated to determine if it is a wetland. <br /> • This project will disturb more than 100 CY of material. Sediment and erosion control <br /> information meeting the requirements of Orono's City Code 79-7(c)(2) must be <br /> submitted. The minimum $2000 sediment and erosion control financial security should , <br /> be required of the owner for this permit. <br /> If you have any questions, please call me at(651) 604-4894 or send an email to <br /> darren.amundsenCa�bonestrao.com. <br /> Yours very truly, <br /> � � i . <br /> Darren Amundsen <br /> cc: Tom Kellogg <br />