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� � PC Exhibit M <br /> . = BOLTON 8� M �N K , i NC� <br /> , Consuiting Engineers & Sunreyors <br /> " 2638 Shadow Lane,Suite 200•Chaska,MN 55318-1172 <br /> Phone(952)448-8838•Fax(952)448-8805 <br /> www.bolton-menk.com <br /> June 13,2012 <br /> � City of Orono <br /> Attn:Mike Gaffron <br /> PO Box 66 <br /> Orono,Mn 55323 <br /> RE: Land Use Application 12-3560 <br /> Lot Fill and Proposed House Construction <br /> 3205 Graham Hill Road <br /> Dear Mike: <br /> As requested,we have reviewed the following information for Zoning File#12-3560 for a proposed house <br /> at 3205 Graham Hill Road: <br /> � • Original grading plan for the Graham Hill subdivision prepazed in 2007 <br /> • The as-built grading survey prepared by Gronberg&Associates dated Mazch 29,2011 <br /> �+ The proposed grading plan for the proposed house <br /> Based on our review,we offer the following comments for your consideration: <br /> 1. The fill that has been placed on the property is primarily located in the northwest corner of the <br /> property. It appears that the fill that has been placed has raised the grade of the lot approximately <br /> 4 feet in some locations. <br /> 2. It appears that the existing and proposed grades maintain the drainage patterns that were <br /> originally established for this lot. <br /> 3. If this project will disturb more than 100 cubic yards of material,a Storm Water Pollution <br /> Prevention Plan(SWPPP)must be submitted for review in accordance with Sec.79 of the City <br /> Code. The minimum$2,000 sediment and erosion control financial security should also be <br /> , required. <br /> 4. There are retaining walls shown as part of the proposed grading plan. Walls that are proposed to <br /> have a height of 4 feet or more must be designed by a Licensed Professional Engineer. <br /> 5. There is an azea on the west property line that appears to be a landscaped area. This area is <br /> shown to be flat and it is uncleaz how the drainage is intended to work in this area. Additional <br /> detail should be provided. <br /> 6. The applicant will be required to obtain a Minnehaha Creek Watershed District pernut for erosion <br /> control. A copy of the pernut should be submitted to the City after MCWD approval. <br /> Please contact me if you have any questions or need additional information. <br /> Sincerely, - <br /> BOLTON&MENK,INC. <br /> �� � �� <br /> David P.Martini <br /> Principal Engineer <br />