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I .� �Bonestroo Memo �� ErgMeers 6 MCMitects Project Name: Backes Residence, 2940 Fox Street Client: City of Orono To: Evelyn Turner, City Planner File No: 139-06-000 From: John Smyth, C.W.D. and Amy Carolan, Date: 7/31/2006 Ecologist Re: Buffer Ordinance Compliance Remarks: Per Division 1. Sec. 78-1601 of Orono's Wetland Protection Ordinance, the proposed construction on the above listed property triggers the city's ordinance due to the following: • Disturbed property drains towards the wetland. • �rading exceeds 50 cubic yards. • Net increase in the square footage of impervious surface area. The wetlands found on this property have both been classified as Manage 3 wetlands, which require a buffer width of 16.5 feet. The following is a summary of the issues that exist with the current plan submitted to the City, and the requirements per the Wetland Protection Ordinance to be in compliance: 1. According to the current grading plan, the patio surrounding the pool is located in the setback. City ordinance states that all principle and accessory buildings must be set back a minimum of 20 feet from the wetland buffer(Div. 5 Sec. 78-1608 (2)). Patio slabs and grade-level decks are exempt from this rule which suggests the pool area may still be in compliance with the city's ordinance. 2. The patio surrounding the pool area will slope towards the wetland, and the reshaping of existing contours on the east side of the home may channel surface runoff towards the wetland and buffer (which lacks a complete setback area due to the patio). • Per Div. 5 Sec 78-1608 (1� hard surface runoff must be treated in accordance with the requirements of the city and appropriate watershed district. • Recommendation: Extend native buffer vegetation to proposed contour line (968', NE of pool) to filter runoff from patio, and east side of the home. Bonestroo,Rosene,Anderlik and Associates,Inc. www.bonestroo.com ❑St.Paul O�ce: ❑Milwaukee Office: ❑Rochester Office: ❑Willmar Office: ❑St.Cloud O�ce: ❑Grayslake Office: 2335 West Highway 36 1516 West Mequon Road 112 7`"Street NE 205 Sth Street SW 3721 23rd Street S 888 East Belvidere Road St.Paul,MN 55113 Mequon,WI 53092 Rochester,MN 55906 Willmar,MN 56201 St.Cloud,MN 56301 Grayslake,IL 60030 Phone:651-636-4600 Phone:262-241-4466 Phone:507-282-2100 Phone:320-214-9557 Phone:320-251-4553 Phone:847-548-6774 Fax:651-636-1311 Fax:262-241-4901 Fax:507-282-3100 Fax:320-214-9458 Fax:320-251-6252 Fax:847-548-6979