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� , <br /> '�j- Stantec Consulting Services Inc. <br />� �� 2335 Highway 36 West <br /> ;�•�� <br /> -�,; f-';• St. Paul MN 55113 <br /> Tel: (651)636-4600 <br /> Fax: (651)636-1311 <br /> 5�11�C �Bonestroo <br /> October 28, 2011 <br /> Melanie Curtis <br /> Planning &Zoning Coordinator <br /> City of Orono <br /> Post Office Box 66 <br /> Crystal Bay, MN 55323 <br /> Re: 400 Willow Drive South <br /> � File No. 000139-11000-1 (Stantec No. 193800284) <br /> Plat No. 11-3534 <br /> Dear Melanie: <br /> x.;� <br /> ui;;[ <br /> We have reviewed the plans for the proposed grading plan and preliminary plat for 400 Willow Drive South. <br /> The plans are dated 10-19-11 and show a proposed road with three lots. We have the following comments <br /> ' with regards to engineering matters: <br /> • Perimeter drainage and utility easements should be shown on the Preliminary Plat. They should be <br /> 5'wide along all interior lot lines or adjacent platted property with existing easements and 10'wide <br /> along the exterior lot lines. <br /> • Drainage and utility easements should be provided over all wetlands and wetland buffers as well as <br /> the proposed stormwater pond. <br /> • We have received drainage calculations and will submit review comments separately. <br /> • More details should be provided to determine where the offsite drainage locations. Specifically,the <br /> plans must show where runoff exits the wetlands. <br /> • The proposed road profile should match existing near station 0+20 where it meets Willow Drive. <br /> • This project will trigger the city's Conservation Design ordinance and additional design and ecological <br /> restoration plans will be required. <br /> • See attached wetland comments from John Smyth dated 10-28-11. <br /> • This project will disturb more than 100 CY of material triggering Orono's erosion control ordinance. <br /> City code requires that an erosion control financial security be submitted in the amount of 125%of <br /> � the estimated cost to accomplish compliance with the SWPPP. The estimated cost for the project is <br /> $4,000 and the required security would then be$5,000. This includes silt fence re-installation, site <br /> seeding, and maintenance of catch basin sediment protection devices. <br /> If you have any questions, please contact me at(651) 604-4894 or darren.amundsen@stantec.com. <br /> Sincerely, <br /> Stantec <br /> ,p. �✓ <br /> 1 � <br /> Darren Amundsen <br /> - cc: John Smyth, Chris Mattson <br />