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- � Bonestroo Z335 West Highw�y 3G • St.P�ul, MN 55113 � o—� <br /> _ �+� OfFice:G51-G3G-4G00 • Fax: G51-G3G-1311 � <br /> Rosene <br /> - Anderlitc& www.bonestroo.com "��' <br /> � Associ�tes Aq, ��'�' �, <br /> Engineers&Architects /ry./� .{ ��� <br /> e� <br /> January 17,200G �rylr��� `���6 <br /> . �'�'O <br /> Mr.Micliael Gaffron �(,? <br /> Pianning Director <br /> City of Orono � <br /> Post Office Box 66 <br /> Crystal Bay,MN 55323 <br /> Re: 3 845 North Shore Drive <br /> File No.000139-05000-0 <br /> Plat No.OS-3161 <br /> Dear M ike: <br /> We have reviewed the site plans and preliminary plat dated 10/19/OS that were resubmitted on 1/l 1/06 for the proposed <br /> improvements at 3845 North Shore Drive,I'ritz Addition.The plans propose to subdivide three existing lots into a five ' <br /> lot single family subdivision.The existing plat area is 3.85 acres with 0.08 acres of wetland for a total of 3.77acres of net <br /> plat area. We have the following coinments with regards to engineering matters: <br /> • The proposed retaining wall is shown exceeding�feet in height in some areas.A separate engineered design <br /> and detail must be submitted for all walls that are greater than 4-feet in height or two tiered walls where the <br /> separation is less than 2 times the height of the wall. <br /> • The private street serving Lot 1 and 3 is shown at 3%though a 2%grade for 50 feet is desirable. This will be <br /> acceptable with the grades coming from the site. <br /> • The plans indicate the locations for rain gardens and drainage swales but no drainage easements have been <br /> shown over them. We reconunend that drainage and utility easements be provided over all storm water <br /> facilities. <br /> • The water service to Lot 4 will need to be placed upstream of the sewer service. � <br /> • The construction details shown are not the city standard details.Sheet C8-1 should be revised to show the city <br /> standard details. <br /> • See attached comments from Lance Hoff with regards to drainage issues and the storm sewer improvements. <br /> • As noted in our previous review letters,we strongly encourage the city to require an overail grading plan to <br /> verify drainage patterns and minimize potential drainage problems in the future. <br /> • We have estiinated the costs for site improvements to be$108,420.00.The applicant should provide the City <br /> with a letter of credit for 150%of this amount or$162,630.00 prior to any work on site. <br /> If you have any questions or need any clarifications please contact me at(651)604-4863. . <br /> Yours very truly, , <br /> BON�STROO,ROSEN�,ANDERLIK&ASSOC[ATES,INC. <br /> _ __,. �' <br /> `�G`"�� � _._,..,_. <br /> Totn Kello �' <br /> gg � <br /> Attachments <br /> cc: Greg Gappa,City of Orono <br /> St. Paul, St. Cloud, Rochester, MN ° Milwaul<ee, WI • Chicago, IL <br /> � Affirma[tve Action/Equal Opportuniry Employer and Employee Owned <br />