5.1 - 5.2 PCSR 09-10-2013 - Laserfiche WebLink

Home Browse Search

August 12, 2013 Ms. Marilyn VanPatten 10451 175th Ave NW Elk River, MN 55330 Re: Heritage Maples: Preliminary and Final Plat Conditional Use Permit Dear Ms. VanPatten, At the Site Plan Review Committee meeting on August 2, staff reviewed your application and has a number of comments. Engineering/ Water • Drainage calculations provided do not follow the requirements of the 2013 MPCA Construction Stormwater Permit. Major changes to the new permit include but are not limited to the drainage volumes leaving the site not exceeding predevelopment volumes and ATLAS 14 precipitation data is to be used for all events. Please review the new requirements on the MPCA website at: http://www.pca.state.mn.us/index.php/water/water-types-and- programs/stormwater/construction-stormwater/mpca-to-re-issue-construction- s tormwater-general-p ermit.html • Please show adjacent property contour information to better identify how water is projected to leave the site.The east side appears to go south across the property line. • Desired minimum depth for all catch basins to be located in a public street is 4.0- feet. Minimum allowable is 3.0-feet. • Per drawings dated 08/06/2013, there appears to be a low point proposed to be graded into the TH 10 ditch near proposed station 2+75.Adjust to assure positive drainage is maintained along the TH 10 south ditch line. • Contours of proposed detention pond cannot extend into the proposed sidewalk. • Access should be provided off the east end of the parking area to the temporary cul- de-sac to facilitate parking movements in and out of the last two provided stalls. Alternatively, a parking bump out could facilitate necessary internal maneuvering. • No trash enclosure is shown. Trash enclosure should be constructed of stone or rough faced block,with cedar sided gates.