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j fl j Bonestroo· 9 Rosene "1\11 Anderlik & 1 \11 Associates Engineers & Architects October 12, 2004 Ms. Janice Gundlach Planner City of Orono Post Office Box 66 Crystal Bay, MN 55323 2? X/est Highway 36 • St. Paul, MN 55113 Office: 651-636-4600 • Fax: 651-636-1311 www.bonestroo.com Re: 1625 Bohns Point Road File No. 139-04-000 Plat No. 04-3042 EXHIBITF --~ ... ,, ., " ~ .I- ocr 1 3 2004 t.11 'lv,v . 11 UN0 We have reviewed the proposed and as-built grading plans for the home constructed at 1625 Bohns Point Road. The applicants engineer calculated the amount of fill brought into the site at 3940 cubic yards. The previously approved grading plan estimated that 1650 cubic yards of fill would be brought onto the site to construct the home. The additional fill has raised the grades in several areas and has impacted the drainage across the property. We have the following comments with regards to engineering matters: • The as-built grading plan does not agree with the building permit grading plan in several areas, particularly along the north lot line. The area between the pool and the north lot line was defined as a high point with swales routing water easterly and westerly on the building permit grading plan. These swales were meant to keep drainage on the subject property and convey flows either westerly to the lake or easterly to the existing pond. The as -built grading plan does not show that these swales were constructed as planned and it appears some water is directed northerly from the high point onto the adjacent property. In addition, water traveling easterly to the pond crosses over the north lot line onto the adjacent property approximately 35 to 40 feet west of the point shown on the building permit grading plan. The defined swale shown on the building permit grading plan westerly from the high point was not constructed. We recommend that the applicant regrade along the north lot line to contain water on the subject property to the extent shown on the building permit grading plan. • The proposed swale along the south side of the home shown at the 932 contour on the building permit grading plan was not constructed. This area should be regraded to direct water towards the lake and to drain the low area between the subject property and the property to the south. • The City should review and inspect any grading revisions and verify that the changes agree with the previously approved building permit grading plan. • Silt fence and any other necessary erosion control measures should be installed, inspected and approved by city staff prior to any work on site . If you have any questions please call me at (651) 604-4863 . Yours very truly, BONESTROO, ROSENE, ANDERLIK & ASSOCIATES, INC . ;;;;,.,y+ Tom Kellogg Cc: Greg Gappa, c:;ity of Orono Bruce Vang, City of Orono • St. Paul, St. Cloud, Rochester, Willmar, MN• Milwaul<ee, WI• Chicago, IL Affirmative Action/Equa l Opportunity Employer and Employee Owned