10-19-2009 Planning Commission Packet

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� 2335 Highway 36 W St Paul,MN 55113 Te1651-636-4600 Fax 651-636-1311 www.bonestroo.com September 29, zoo9 �'Bonestroa Ms. Melanie Curtis Planning and Zoning Coordinator City of Orono Post Office Box 66 Crystal Bay, MN 55323 Re: 09-3431 3165 North Shore Drive File No. 000139-09000-1 File No. 09-3431 Dear Melanie: We have reviewed the plans for the proposed grading project located at 3165 North Shore Drive. The plans are dated 9-16-09. We have the following comments with regards to engineering matters: • The grading plan shows a berm and swale along the north property line that changes the existing drainage patterns. This may increase the amount of runoff directed toward 3155 North Shore's driveway. We recommend that the applicant provide one of the following three items addressing this situation. o Provide drainage calculations showing no increase in the pre and post project runoff rates for the 2, 10, and 100 year storms at the northeast lot corner. o Provide evidence that this plan is acceptable or a drainage easement from the owner of 3155 North Shore Drive. o Revise the grading plan to accept runoff near the northeast corner. • This project will disturb more than 100 CY of material. Sediment and erosion control information meeting the requirements of Orono's City Code 79-7(c)(2) must be submitted. The minimum $2000 sediment and erosion control financial security should - be required of the applicant for this permit. • This project hauls in a significant amount of fill material. The applicant has provided estimates of 2267 cubic yards which equates to approximately 225 truck loads. It appears that there are two ways trucks could access the site. One through the Bohns Point Road driveway and the other through the shared 3165 North Shore Driveway. The erosion control plan should identify the haul route and identify BMPs assuming considerable tracking will occur. • If the haul route uses the shared 3165 North Shore Drive driveway, an agreement should be in place with the driveway owner(s)or neighbors that documents the existing pavement condition and spells out specific remedies should damage occur during this project.