11-15-2010 Planning Commission Packet

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PC Exhibit E � 2335 Highway 36 W • � St.Paul,MN 55113 Tel 651-636-4600 Fax 651-636-1311 www.bonestroo.com November 8,20�0 �Bonestroo Melanie Curtis Planning and Zoning Coordinator City of Orono Post Office Box 66 Crystal Bay, MN 55323 Re: 4725 North Shore Drive File No. 000139-10000-1 File No. 10-3490 Dear Melanie: We have reviewed the plans and calculations for the proposed slope failure correction at 4725 North Shore Drive. The plans are dated 11-4-10. We have the following comments with regards to engineering matters: • Please see the attached memo from Phillip Caswell dated 11-8-10 regarding the structural stability of the project. • It is our understanding that on site soil or"black dirt" will be used on top of the structural rock boulders on the hillside as topsoil. This will be protected with Verdyol Biotic Earth BFM, FRM, HGM hydromulch and seed. The slope would then be planted with 100 #2 sumac, 40 #2 grow low sumac, 130 #1 day lily, 50 #2 bush honeysuckle. • The applicant should provide a letter from Verdyol stating that they understand the site conditions and that their product will function acceptably as proposed. • The seed mix used in the hydro seeding should be submitted. • A general planting plan should be submitted. This plan should show a general planting pattern over an area. It should provide enough detail to determine or state the density of the plants as proposed. • 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) has been previously submitted. The minimum $2000 sediment and erosion control financial security should be required of the owner for this permit. • Minnehaha Creek Watershed may be reviewing this design as well. The city should verify that this project has received their approval.