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Building a legacy – your legacy. 701 Xenia Avenue South Suite 300 Minneapolis, MN 55416 Tel: 763-541-4800 Fax: 763-541-1700 Equal Opportunity Employer wsbeng.com S:\Community Development\Projects\Planning Cases\Watermark (Mattamy Homes)\Staff Reports\20160511 PZ (PUD Dev Stage PP)\1b 20160504 Engineering Review Lino Lakes-Mattamy.docx Memorandum To: Katie Larsen, City Planner From: Diane Hankee PE, City Engineer Date: May 4, 2016 Re: Mattamy Watermark Plan Review WSB Project No. 2029-820 We have reviewed the revised Preliminary Plat submitted on April 28, 2016 for Watermark in Lino Lakes, MN prepared by Carlson McCain. The revisions were primarily to address traffic and access in the north part of plat by Street D. The following are our review comments that should be responded to in writing by the applicant. These are in addition to the previous comments memo to Katie Larsen dated April 6, 2016: GRADING, EROSION AND SEDIMENT CONTROL 1. The grading, erosion and sediment control preliminary plat documents need to be submitted with the proposed changes for review. We do not anticipate any significant changes to the proposed layouts with relation to grading, erosion and sediment control preliminary. 2. The surface water emergency overflow for lots 127 – 116 needs to be detailed with the addition of Street V access to Street C in consideration with the grades for the ghost plat. The objective is to avoid additional rear yard storm sewer in the future. A profile of Street V should be rough drafted to avoid replacing the roadways stubs and associated yard grading. This will help ensure drainage can be addressed in the low area between the two plats. STORMWATER MANAGEMENT 1. The stormwater management design and calculations need to be updated and re- submitted with the proposed changes for review. We do not anticipate any significant changes to the proposed layouts with relation to the storm sewer system. 2. The side yard storm sewer on narrow lots needs to be coordinated with the building plans. No overhanging windows or window wells can be installed. A clear 20 feet needs to be provided. The applicant shall provide a summary of side yard storm sewer with pipe depths and a summary of how future access for maintenance will be accommodated.