12-13-1999 Council Packet - Laserfiche WebLink

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m Bonestroo Rosene Anderlik & Associates Bonestroo. ffosene. Ance* < inrS Assscfates. trc it an Affirr.njtsve Acf.cn/i^uat Opportuntty Efrp:c/er Pnropatr Otto G. Bor PE. • Joseph C AncJcrtik. PE. • Marvm L Sor/afj. PE. • Glenn R. Cook. PE. • Ro5«%* C Scr^ur.crt. PE • Jerry A, Bcurior P£. • Rooert W. Rosene. P.E.. R.c*jrd E. Turrer. P.£ and Susan M. Eten*n. C.P.A.. Seruor ConiuUaris Associate Principals: Hazard A. Sanford. PE • Kenn A. Gordon. PE • Rceert R. Pfcfferle. PE • Richard W. Foster. PE. • Ca#*d O Loskora. PX • Robert C. Ruisek. A.I A. • Marlr A. Hanson. PE • Michael T. Rautmann. PE. • Ted IC Field. PE. • Kervieth P Andefon. P*’. * Mark R. Rolfs. PE. • Sidney P. Williamson. P.E.. LS. • Robert F. Kotsmith • Agnes M. Ru'g • Allan Rick Schmidt. PE. Offices: St Paul. Rocheste*. Willmar and St Cloud. MN • M.hiArackee. W'l WePsite: wwwbonestroo comEngineers & Architects August 9,1999 Mr. Paul Weinberger Assistant Zoning Administrator City of Orono Post Office Box 66 Crystal Bay, MN 55323 Re: Richie 3-Lot Subdivision BRA File No. 139-2512 Dear Paul: We have reviewed the preliminaiy plat for the proposed three-lot subdivision for Alan and Marilyn Richie. The site is located on the west side of Hennepin County Road No. 135 (Tonkawa Road) just north of the Partenwood Road intersection in the northwest quarter of Section 8. We have the foUowing comments in regards to engineering matters. 1. Access: Proposed access locations for Lots 1 and 2 should be shown on the plans and submitted to Hennepin County for their review. 2 Grading; A grading and erosion control plan for Lhe entire site should be submitted for review. Removing the existing bituminous/concrete walkway to the lake on Lot 3 will create an erosion concern. This area should be restored immediately after the hardcover removal with fiber blanket and bale checks or equivalent. Erosion control measures should be in place prior to any grading or structure removal. 3 Drainage: The draft version of the City’s Comprehensive Storm Water Management Plan (SWMP) shows that the site lies within die Stubbs Bay drainage district The site drains to the south and the north from the high point on Lot 2. All flows uldmately reach Ncrh Arm. The bluff area along the lake and die exiting topoerraphy of the site will make ponding difficult At a minimum we would recommend creaang a vegetated buffer strip along the top of the bluff to provide some water qualify benefits. Final plans should be submitted to the Minnehaha Creek Watershed District for their review. 4 Sanitary Sewer: Sanitary sewer to serve Lot 3 exists i^;st of the existing home along the south property line. Lots I and 2 should be provided sanitary service from Tonkawa Road. The exisung sanitary on Tonkawa Road east of Lot I should be extended southerly approximately 100 feet to serve Lot 2. It is unclear why there is an existing sanitary sewer easement shown across all of Lot I and part of Lot 2. Drainage and utility easements should be provided 5 feet wide along all intcnor lot lines and 10 feet wide along the roadway right-of -way. 5. Financial Guarantee: When the plans have been completed we can prepare an estimate of the to^ cost for the site improvements to determine the amount of the financial guarantee required if the City so desires. Please contact me a‘ • i51) 604-4363 if you have any questions regarding this matter. Yours very truly. ___ BONESTROO '^OSENE. ANDERLIK & ASSOCIATES, CsC. /^irl Tom Kellogg 'Me Cc: Greg Gappa, City of Orono £ 2335 West Highway 36 • St. Paul, MN 55113 ■ 651*636-4600 ■ Fax: 651*636*1311