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r L m- r k ^ •'iv'" Bonestroo Smvv Anderlik& |\|| Associates Engineers & Architects August I9.200S 2335 \W!$t Highway 36 • St. Paul, MN 55113 omce: 651-636-4600 ■ Fax: 65I-636-I3II wwwJKNiesiroo.com 1 Mr. Michael Oaftron Planning Director City of Orono Post OfTice Box 66 Crystal Bay, Minnesota SS323 ^ ^ m ^11V OFO^O/Vo Re; WJM Properties Addition PileNo.OOOI39-OSOO(M) Plat No. OS-31 IS Dear Mike, We have reviewed the revised plans dated 8-12-OS for the parking lot and building addition at die Morries Automotive Group property. The site is located at 260S West Wayzata Boulevard. We have Uie following comments with regards to ei^ne^ng matters: • The proposed revisions to tlie parking lot will direct more storm water easterly than sliown on the previously approved plan. The proposed street along the west side of the building drains to catch basins in tlie curb line and in the center of the proposed roadway. The catch basin in die center of the roadway should be relocated to the curb line. Final plans should include drainage and storm sewer calculations to reflect the proposed parking lot and street designs. • Final plans should include a grading plan showing existing and proposed contours. Proposed contours should be provided for all improvements including those south and west of the existing building. • Tlie street detail provided will not work with the proposed improvements shown west of the existing builduig. The detail shows a crowned street section that will direct water from half of the roadway towards the building. The street section along the west side of the building should not be crowned and show a cross slope of at least 2K away from the building. • Final plans should include some type of best management practice to treat the stonn water leaving the site prior to discharge into the existing ditch. These best monagement practices should be sized according to the drainogo area to be treated. Calculations should be provided to verify the design. • More detail should be provided for the existing draintilc/storm sewer system. Information luch as inverts and the jrpose of the catch basins shown on the slope bL..veen the 1016 and 1014 contours west of tlie building ahouid be provided. • The plana should clarify whether the existing shed shown in the northeast comer of the parking lot expansion area will remain or will be removed. • The plans should clarify how the drainage along the south lot line works. The contours on the plans submitted stop short of the south lot line and should be extended to at least SO-feet soullt of tlie south lot line. • Once the final plans have been completed we will prepare an estimate of the total cost for the site improvements to detemiine the amount of the financial guarantee required. Please contact me at (6SI) 604-4863 if you have any questions regarding this matter. Yours very truly, BONESTROO, ROSENB, ANDERLIK & ASSOCIATES. INC. C: Greg Oappa, City of Orono St. Paul, St. Cloud, Rochester, MN • Milwaukee, Wl • Chicago, IL ArflmuMlvw Actlofi/Bqiiai Opporturlly Employer and Employoo Ownad