05-26-1998 Council Packet - Laserfiche WebLink

Home Browse Search

^ i Bonestroo Rosene Anderlik & Associates Engineers & Architects May 15, 1998 Bonestroo. Rosene. Anderhk A<soci^tes. tnc is jm AffirmMtve Action Equal Opportunity Errpicycr Principals Otto G Bonestroo. PE • Joseph C. Anderlik. PE • M.irvin L Sorvald. PE • RfCh.ird E Tu'"*er. PE • C enn R Cook, PE • Robert G Schuntcht. PE • Jerry A Bourdon. PE • Robert W Rosene, PE and Susan M Fberim. C PA . Senior Consultants c-/ Associate Principals Howard A Sanford. PE • Keith A. Gordon. PE • Robert R Pfcfferic. PE • Richard W. Foster PE • David O Loskota. PE • Robert C Russek. Al A • Vark A Hanson. PE • Michael T Rautmann. PE • Ted K F»efd. PE • Kenneth P Anderson PE • Mark R. Rolfs. P£ • Sidney P VL’iliia.'nson. PE.. L S • Robert F Kotsmiih • Agnes M. Ring • Michael P Rau. PE • Allan Rick Schmdt. PE Offices St Paul. Rochester Willmar and St Cloud. MN • Milwaukee. W Website www bonestroo com Mr. Michael P. Gaffiron Senior Planning Coordinator City of Orono Post Office Box tt Crystal Bay, MN 55323 Re:Waade Subdivision File No. 139-2340 Dear Mike: We have reviewed the revised plat, revised grading plan and drainage calculations for the proposed two lot Waade subdivision. The site is located at 3280 and 3290 Northshore Drive (C.R. 51) east of Tonkawa Road (C.R. 135) in the southeast quarter of Section 8. We have the following comments in regards m engineering matters. 1. Access: Please see our March 19.1998 comments as they still apply. 2. Udlities: Please see our March 19, 1998 comments as they still apply. 3. Grading r.nd Drainage: The revised grading plan shows a proposed 932.0 contour along the east lot line of the pro| •ci ty nonlieast of the future twinhome. If the pond reaches the overflow elevation of 932.5 shown on the grading pi.'’... storm water will be reuted through this low area towards the existing properties located cast of the site. We '•rciniimenu that (he ^.lading plan be revised so that flows are directed northerly towards the lake away from the existing homes. The drainage urea map indicates that approximately 0.5 acres of the site that previously drained easterly 'wil! tiow flow northerly to the lake. This will reduce off-site flows onto the properties to the east but may compound any existing drainage problems east of the site. Storm water to the east of the site may reach greater depllis beewse there will be less area to pond after a rainfall. The City should review any existing drainage problems east of the subject property as the proposed sitf grading may limit or restrict any future drainage solutions. A recently submitted revised plat does show the access road shifted westerly away from the existing home as previously reouested. A revised grading plan showing proposed grading along the existing home and street should be submitied for review. The drainage calculations appear acceptable. The pond outlet should provide 1 foot of skimming for waiei uuality purposes. An cutlet structure detail should be provided for review. It is assumed that both homes will be slab-op-grade construction so that the proposed lowest floor elevations (935.0) will be more than •he teuu'.r’cd rranimun ’ of 2 feet above the pond HWT., (931.66). 4. Tlie recently submitted revised plat appears to correctly show the 20 foot utility easemenl ^ong the existing sariitci v sev.er on the west side of the loi. 5. Finuricict Guarantee: V/hen the olans h.ivc been completed we will prepare an estimate of the total cost for the site improvetnc.it- to determine the amount of tne financial guarantee required. Please contact me at (604-4863) if you have any questions regarding this matter. Yours very truly, BONESTROO. ROSENE. ANDERLIK & ASSOCIATES. INC /<T^ Yom Kellogg Greg Gappe, City ot Orono 2335 West Highway 36 ■ St. Paul, MN 55113 ■ 612-636-4600 ■ Fax; 612-636-1311