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2335 Highway 36 W St. Paul,MN 55113 Tel 651-636-4600 Fax 651-636-1311 wwvu.bonestroo.com January 20, 2011 � Bonestroo Ms. Melanie Curtis Planning and Zoning Coordinator City of Orono Post Office Box 66 Crystal Bay, MN 55323 Re: 2105 Sugarwood Drive File No. 000139-11000-2 File No. 2009-00730 Dear Melanie: We have reviewed the as-built plans for the home constructed at 2105 Sugarwood Drive. The plans are dated 1-3-11. We have the following comments with regards to engineering matters: • The goal of the original approved grading plan was to control the location of and lirriit the amount of storm water runoff to the neighboring properly. o A drainage easement should have been obtained from the 2107 Sugarwood Drive property accommodating a new and increased runoff point from 2105 Sugarwood Drive. The as-built grading plan shows drainage crossing the lot line outside of this easement. Grading should be revised to direct drainage into the 2107 Sugarwood Drive drainage easement. The city should also verify that this easement has been obtained and recorded. o The approved gradmg plan shows the front of the house, stoop area,walk, and driveway draining to Sugarwood Drive. The as-built shows this area draining to 2107 Sugarwood Drive. The grading and drainage patterns must be revised and match the approved grading plan in this area. • The plan must show all of the site's retaining walls. Engineered design and details should be submitted for all retaining walls over four in height, and for all tiered walls with a separation of less than two times the wall height. • If any drain pipes,drainage structures, or drain tiles were installed with this project,they should be shown on the as-built plans. • Based on an October 2010 site visit, the as-built plan contours shown in the backyard likely dces not reflect the grading on site. A site and grading plan showing all as-built grading must be resubmitted.