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• = BOLTON 8� I�/I �N K , I NC� . Consulting Engineers & Surveyors �� 2638 Shadow Lane, Suite 200•Chaska, MN 55318-1172 Phone(952)448-8838• Fax(952)448-8805 www.bolton-menk.com June 17, 2014 City of Orono Attn: Melanie Curtis 2750 Kelley Parkway Orono, MN 55356 RE: Building Permit Application 2014-00578 440 Big Island Engineering Review#1 Dear Melanie, As requested, we have completed an engineering review of the documents submitted for the above referenced project. Our current review is based on the following submittal items: • Certificate of Survey prepared by Advance Surveying&Engineering, dated 4/1/14 • Resolution 6383 granting Variances and a Conditional Use Permit • Email correspondence regarding tree removal in 75' shoreland setback We offer the following observations, comments, and recommendations for your consideration: 1. Proposed grading on the south side of the site must be revised to accurately connect to existing contours. The proposed 974 contour should be routed around the hill in the southwest corner to connect to the existing 974 contour and create a slope towards the proposed swale on the southeast side of the proposed building. 2. The Primary Treatment Site far the on-site septic system should be indicated on the Certificate of Survey. Protection fencing should be installed around the treatment sites to ensure they are not impacted during grading operations and building construction. Protection fencing should be inspected by the City Engineer prior to any land disturbing activities. 3. The Certificate of Survey should be revised to indicate trees marked for removal. Protection fencing should be indicated around trees to be preserved. 4. The Applicant proposes to remove two trees within the 75' shoreland setback ar bluff impact zone to gain access to the site. The trees should be replaced with an equivalent number of a type and size acceptable to the City at approximately the same setback from the shoreline. 5. Perimeter siltfence should be installed and inspected by the City priar to any land disturbing activities. The Contractor must provide 24 hour notice prior to inspection. 6. Erosion control blanket should be installed on all disturbed slopes 3:1 or greater. The Certificate of Survey should be revised to indicate blanket locations. 7. All disturbed areas should be stabilized within 7 days after construction activity is complete to limit erosion. 8. An as-built grading plan/survey showing conformance with the approved plan must be submitted prior to the final inspection of site grading. DESIGNING FOR A BETfER TOMORROW Bolton&Menk is an equal opportunity employer