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L- I* J �< F <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 />August 16, 2016 <br />City of Orono <br />Attn: Mike Gaffron <br />2750 Kelley Parkway <br />Orono, MIST 55356 <br />RE: Final Plat Application 15-3749 <br />Crystal Bay Estates <br />Engineering Review #3 <br />Dear Mike: <br />As requested, we have completed an engineering review of the documents submitted for the above <br />referenced project. We offer the following observations, comments, and recommendations for your <br />consideration: <br />llxi=cwo:37.11F <br />Council <br />Exhibit F <br />1.1 The Engineer's Estimate lists probable costs for the project at $236,849.50 to complete Grading & <br />Erosion Control, Storm Sewer Construction, and Street Construction. The estimated cost of <br />proposed landscape improvements must also be submitted in order to determine the total Letter of <br />Credit (LOC) amount. The LOC must be written to 150% of cost of improvements and submitted <br />prior to any land disturbing activities. Estimated costs for landscape improvements should include <br />invasive species control as well as new plantings. <br />1.2 A copy of the final Minnehaha Creek Watershed District (MCWD) permit should be submitted <br />prior to any land disturbing activities. <br />1.3 A copy of the General Construction Permit (NPDES) to discharge stormwater associated with <br />construction activity should be submitted prior to any land disturbing activities. <br />1.4 Record drawings must be submitted upon completion of the project. Record survey shots on <br />basins must be obtained after construction sediment is removed and side slopes re -dressed. <br />2.0 FINIAL PLAT: <br />2.1 Wetland Conservation and Flowage Easements must be provided over Wetlands #1 and #2 and be <br />recorded with the Final Plat. <br />Please let me know if you have any questions or need additional information. <br />Sincerely, <br />BOLTON & MENK, INC. <br />64 <br />Robert E. Bean, Jr., P.E. <br />Water Resources Engineer <br />