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Christine Mattson From: Melanie Curtis Sent: Friday, May 31, 2013 10:17 AM To: marklecy@lecybros.com Cc: andyjohnsrud@lecybros.com; David Crook; barnold@lecybros.com; 'mikemann@lecybros.com';jbcorness@gmail.com; Christine Mattson Subject: Permit 2013-00317 for 4395 North Shore Drive Good morning Please see comments from Jesse Struve below. Please submit a revised survey reflecting a plan which incorporates Mr. Struve's recommendations for our continued review of the permit. Thank you, Melanie Melanie Curtis Planning &Zoning Coordinator City of Orono 2750 Kelley Parkway Orono, MN 55356 Direct Dial: 952.249.4627 Fax: 952.249.4616 Planning &Zoning Office 952.249.4620 Email: mcurtisCc�ci.orono.mn.us Website: www.ci.orono.mn.us City of Orono Office Hours-SUMMER HOURS Monday -Thursday 7:30 am - 5 pm Friday 7:30 am - 11:30 pm From: Jesse Struve Sent: Friday, May 31, 2013 10:04 AM To: Melanie Curtis; Christine Mattson Subject: FW: Lecy 4395 North Shore Dr. Melanie, I have reviewed the existing and proposed drainage areas and would offer a few suggestions. When you look at the drainage area,they have decreased drainage to the neighboring property(overall), but it has increased the drainage which is being directed to the neighboring property's retaining wall and house. It is a relatively small amount because it is just the increased hardcover area (685 SF per the surveyors numbers below). The existing house hardcover was directed at the neighboring property, but it was directed south of the existing retaining wall. Although it is a small number, I have concerns the neighboring property might perceive an issue and potential damage to the wall or their structure. In a 1" rainfall the additional 685 SF will add 57 CF or 430 gallons of additional water. I think a simple solution would be to grade a small depression area or rain garden type solution. This depression area will hold an equivalent of 1.5" of volume of the house hardcover or approximately(685SF * 1.5"/12=85.6 CF or approximately 650 gallons). Since this may be a we area,the builder would have various options to deal with it. This would be a very minor depression area which could be grass (mow able)or vegetated to be like a rain garden. They could also do some minor soil corrections (mixing in sand/gravel) into the native soil to promote infiltration. Another fairly easy option would be to do a sand/topsoil mixture with grass. You can then put an draintile underdrain which daylights to the west. This will allow for temporary storage, but would allow for proper drainage so it is not a prolonged wet area. i