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� Bonestroo 2335 West Highway 36 ■ St.Paul, MN 55113 <br /> Rosene OfFice: 651-636-4600 • Fax:651-636-1311 <br /> Anderlilc& www.bonestroo.com <br /> Associates <br /> Engineers&Architects <br /> August 8, 2005 <br /> Ms. Jaiiice Gundlach <br /> Plam�er <br /> City of Orono <br /> Post Office Box 66 <br /> Crystal Bay, MN 55323 <br /> Re: 774 Tonkawa Road <br /> File No. 000139-05000-0 _ <br /> Plat No. OS-3143 <br /> Dear Janice: <br /> We have reviewed the site plans dated 8-3-OS for the proposed'unproveinents to 774 Tonkawa Road. <br /> The site unprovements include the construction of a new home and associated grading.We have the <br /> followuig coinrnents with regards to engineering matters: <br /> • The existuig survey shows a swale along the south side of the existing home that conveys <br /> water towards the lake. The proposed grading plan eliminates this swale.A revised grad'uig <br /> plan shoutd be provided that maintains the existing swale along the south side of the hoine. <br /> • The proposed swale along the north side of the honle should be extended to the proposed 958 <br /> contour shown on the lake side of the home. <br /> • The swale shown along the north side of the home approaches grades of 25%. Swales that <br /> exceed 5% are susceptible to erosion issues. Fu�al plaus should include swale stabilization <br /> detaiis for all swales that exceed 5%. <br /> • It appears that water north of the proposed garage will drain northerly towards the neighbor's <br /> garage. Final grad'ulg plans sliould 'ulclude a design to direct storul water from this area <br /> towards the roadway and not onto the neighbaring property. <br /> • Final plans should include erosion and sediment control details. <br /> If you have any questions please call me at (651) 604-4863. <br /> Yours very truly, <br /> BONESTR00, ROSENE, ANDERLIK& ASSOCIATES, INC. <br /> .�--�-- <br /> ��� <br /> Tom Kellogg <br /> Cc: Greg Gappa, City of Orono <br /> St. Paui, St. �loud, Rochester, MN • Miiwaul<ee, WI ■ Chicago, IL <br /> Affirmative Action/Equal Opportuni[y Employer and Employee Owned <br />