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_ Bonestroo <br /> 2335 West Highway 3G • St. Paul, MN 55113 EXHIBIT F <br /> Rosene Office: G51-63G-4G00 • Fax:G51-63G-1311 <br /> Anderlilc& www.bonestroo.com <br /> - Associ�tes <br /> Engineers&Architects <br /> Apri129, 2005 ���";'.'�.:;,,;.,,... <br /> �-� <br /> Ms. Janice Gundlach �AY (,� �,� � <br /> Plamier �1.�....��f- -�U5 <br /> City of Orono ('j�o�� <br /> Post Office Box 66 <br /> Crystal Bay, MN 55323 <br /> Re: 1745 rox Street <br /> File No. 000139-05000-0 <br /> Plat No. OS-3097 <br /> Dear Janice: <br /> We have reviewed the site plans dated 4-7-OS for the proposed iinprovements to 1745 Fox Street. The plans <br /> propose to subdivide an existing single fainily lot into a six lot single family subdivision. The existing lot is <br /> 57.91 acres of which 21.11 acres are dry. We have the following comments with regards to eugineering <br /> matters: <br /> • The drainage calculations provided only address an area(8 acres)that is to be routed to the proposed <br /> pond. The city requires that storm water rate control be met for the entire site. In other words,post <br /> development flows for the entire site must not exceed predevelopment flows. Drainage calculations <br /> should be revised to cover the entire site. It may be necessary to incorporate some best management <br /> practices in addition to the pond to meet the rate control required. <br /> • The proposed pond needs to meet NLTRP standards. <br /> • Because the iinprovements will disturb more than one acre the final plans should include a detailed <br /> temporary and permanent erosion and sediment control plan as required for the NPDES permit . <br /> • The proposed retaining walls exceed 4-feet in height in some areas.A separate engineered design and <br /> detail submittal is required for all walls that are greater than 4-feet in height. <br /> • The liinits of the proposed grading for the retaining walls approaches some septic site locations. It is <br /> likely that the grading shown will impact the proposed septic sites on Lots 3 and 4. We recoinmend <br /> that the grad'uig plan be revised or alternative septic sites be shown to eluninate any potential conflicts. <br /> • The driveway shown across Outlot A to serve Lot 6 should be configured to serve the existing guest <br /> house if this structure is to reinain.The guest house access onto Fox Street should be reinoved and the. <br /> ditch regraded. <br /> • We received a separate plan dated 4-14-OS proposing un�rovements to Fox Street to eliminate a sight <br /> distance issue. The plans should be revised to show the existing street grldes and include existing <br /> vertical curve infot7nation so we can fiirther a�ialyze the necessity of any improvements to Fox Street. <br /> If you have any questi.ons please call me at(651)604-4863. <br /> Yours very t�-�ily, <br /> BONESTROO, ROS�NL,AND�RLIK&ASSOCIATES, INC. <br /> ✓ <br /> ��2 <br /> Tum I�ellogg <br /> Cc: Greg Gappa, City of Orono <br /> St. Paul, St. Cloud, Rochester, MN • Milwaul<ee, WI ■ Chicago, IL <br /> Affirmative Act(on/Equal Opportunity Employer and Employee Owned <br />