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2335 West Highway 3G • St. Paul, MN 55113 � � � <br /> �� Bonestroo <br /> - "' s� Office: GSl-G3G-4G00 • Fax: G51-G3G-1311 ��� <br /> � Rosene <br /> ��rt� �Y Anderlil<& www.bonestroo.com �`�'�C�o, <br /> Associates �� ����°�-��.� <br /> Engineers&Architects �;'' ` �� ,� �� ' <br /> January 17,200G �'��t7�. `��6 <br /> � <br /> Mr.Michael Gaffron ���/�� <br /> Planning Director <br /> City of Orona <br /> Post Office Box 6G <br /> Crystal Bay,MN 55323 <br /> Re: 3845 North Shore Drive <br /> File No. 000139-05000-0 <br /> Plat No. OS-3]61 <br /> Deac Mike: <br /> We have reviewed the site plans and preliminary plat dated 10/19/OS that were resubmitted on 1/1 1/06 for the proposed <br /> improvements at 3845 North Shore Drive,Pritz 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�vall is shown exceeding 4 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 tl�e <br /> separation is less than 2 times tl�e 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 recommend 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 stonn sewer improvements. <br /> • As noted in our previous review letters, we strongly encourage the city to require an overall grading plan to <br /> verify drainage patterns and minimize potential drainage problems in the future. <br /> • We have estimated the costs for site improvements to be$108,420.00.The applicant sl�ould provide the City <br /> with a letter of credit for 150%of this amount or$l 62,630.00 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�,AIVDERLIK Rt ASSOCIATk,S,INC. <br /> _._....._._.....T `�' J <br /> �'�i�S•'� � �"f(3^"�j' <br /> �.�[{�,-:,� / -..T <br /> Tom Kellogg� �'�! <br /> flttachments <br /> cc: Greg Gappa, City oFOrono <br /> St. Paui, St. Cloud, Rochester, MN • Milwaul<ee, WI • Chic�go, IL <br /> A/firmativc Action;Equal Opportunity Employer and Employee Owned ` <br />