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` • = BO LTON 8� M �N K , I N C� <br /> . Consulting Engineers & Surveyors <br /> '� 2638 Shadow Lane, Suite 200•Chaska, MN 55318-1172 <br /> Phone(952)448-8838• Fax(952)448-8805 <br /> www.bolton-menk.com <br /> May 7, 2013 <br /> City of Orono <br /> Attn: Melanie Curtis <br /> PO Box 66 <br /> Orono, MN 55323 <br /> RE: Permit#2011-00156 <br /> 340 Leaf Street <br /> Wetland Buffer Planting Plan Review <br /> Dear Melanie: <br /> As requested, we have completed an engineering review of the documents submitted far the above <br /> referenced project. Our current review is based on the following submittal items: <br /> • Wetland Buffer Planting Plan; stamped 4/15/13 <br /> • Buffer area sketch <br /> � Wetland Buffer review memorandum by Bonestroo; dated 5/13/11 <br /> We offer the following observations, comments, and recommendations for your consideration: <br /> 1. The final seed mix should be submitted for review and approval prior to seeding to ensure the mix <br /> includes 12 pounds pure live seed (PLS) per acre of native prairie grass seed and five pounds PLS <br /> per acre of native forbs. Native prairie grass and native forb mixes shall contain no fewer than four <br /> and five species respectively. <br /> 2. The plan indicates that seeding of vegetation that can withstand winter will be broadcast in mid <br /> October and seeding of vegetation that will work best in spring will be broadcast in late April. A <br /> final seed mix should be submitted for review to determine the best time of year to broadcast. <br /> Please let me know if you have any questions or need additional information. <br /> Sincerely, <br /> BOLTON & MENK, INC. <br /> �a�� `��a'�` <br /> Robert E. Bean, Jr., P.E. <br /> Water Resources Engineer <br />