2009-00802 - adv plan review - Laserfiche WebLink

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� � , 2335 Highway 36 W St.Paul,MN 55113 � Te1651-636-4600 Fax 651-636-1311 www.bonestroo.com November 23, 2009 � Bonestroo Ms. Melanie Curtis Planning and Zoning Coordinator City of Orono Post Office Box 66 Crystal Bay, MN 55323 Re: 2400 Fox Street File No. 000139-09000-2 File No. 2009-0803 Dear Melanie: We have reviewed the plans for a proposed new home construction at 2400 Fox Street. The plans are dated 11-10-09 with an emailed updated version received 1i-20-09. We have the following comments with regards to engineering matters: • It appears that the proposed retaining walls on the east side of the house are approximately 10 feet high and the retaining walls on the west side are 7 feet high. Engineered design and details should be submitted for review and approval for all retaining walls over four in height, and for all tiered walls with a separation of less than two times the wall height. • The proposed grades between the driveway and Fox Street exceed the maximum allowable 3:1. This must be revised. • The proposed driveway connects to Fox Street at a low point where an existing culvert crosses Fox Street. It appears the intent is to have a split driveway with two new culverts under each leg of the driveway. The existing Fox Street culvert would be between the split. We recommend a single driveway access point with a storm manhole connecting the existing culvert to two new culverts extending to each side of the driveway. • We recommend that public works inspect the condition of the Fox Street and consider its replacement if the driveway is constructed over it. • 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 securiry should be required of the owner for this permit.