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PC Exhibit F � <br /> 2335 Highway 36 W <br /> SL Paul,MN 55113 <br /> Te1651-636-4600 <br /> Fax 651-636-1311 <br /> www.bonestroo.com <br /> �u�y 6, zo�o , �Bonestroo <br /> Evelyn Turner , <br /> Planner <br /> City of Orono <br /> Post Office Box 66 <br /> Crystal Bay, MN 55323 <br /> - Re: 550 East Long Lake Road <br /> File No. 000139-10000-1 <br /> File No. 10-3476 <br /> , � <br /> Dear Evelyn: <br /> We have reviewed the plans for grading activities at 550 East Long Lake Road. The plans are <br /> dated 6-21-10. We have the following comments with regards to engineering matters: <br /> • It is our understanding that the proposed retaining walls greater than four feet in height <br /> . will have designs submitted for review with the required building permit application. <br /> • We understand that the rain gardens are not required by the city. Assuming that the <br /> soils are not conducive to infiltration, we would recommend that a permeable planting <br /> media be used in combination with a draintile system to allow proper function. We <br /> would also encourage native rain garden plantings. The discharge location of the <br /> draintile(s)will likely be located with the right of way and shouid be reviewed by the city <br /> if installed. f <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 cali me at(651) 604-4894 or send an email to <br /> darren.amundsenCa�bonestroo.com. <br /> Yours very truly, <br /> �-- . � . <br /> Darren Amundsen <br /> cc: Tom Keliogg <br /> Melanie Curtis <br /> , <br />