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Bonestroo <br />Rosene <br />Anderlik & <br />Associates <br />Bonestroo, Rosene, Anderlik end Associates, tnc. Is an Affirmative Actlor^/Bqual Opportunity Employer <br />Principals: Otto G, Bonestroo. PE. • Joseph C Anderlik. P£, • Marvin L Sorvala. PX • <br />Glenn R. Cooir, PX • Robert G. Schunicht. PX • Jerry A. Bourdon, PX • <br />Robert W. Rosene. PX. Richard E. TUrner, PX and Susan M. Bbeilla CPA., Senior Consultanu <br />Associate Principals: Hoviard A. Sanford, PX • Keith A. Gordoa PX • Robert R. Pfefferfe. PX • <br />Richard W. Foster. PX • David O. Loskota. PX • Robert C Russek. AXA. • Mark A. Hanson. PX • <br />Michael T. Rautmann. PX • Ted ICFIeld, PX • Kenneth P Andersoa PX • Mark R. Rolfs. PX • <br />Sidney R Wllliamscn, PX IS. • Robert P. Kotsmlth • Agnes M. Ring • Allan Ride Schmidt. PX <br />Engineers & Architects <br />August 9,1999 <br />Offices: Sl Paul, Rochester, Wlllmar and St Cloud. MN • Milwaukee. Wl <br />WeOsite: www^onestroo.com <br />. Mr. Paul Weinberger <br />Assistant Zoning Administrator <br />City of Orono <br />Post Office Box 66 <br />Crystal Bay, MN 55323 <br />Re:Richie 3-Lot Subdivision <br />BRAFUeNo. 139-2512 <br />Dear Paul: <br />We have reviewed the preliminary plat for the proposed three-lot subdivision for Alan and Marilyn Richie. <br />The site is located on the west side of Hennepin County Road No. 135 (Tonkawa Road) just-north of the <br />Partenwood Road intersection in the northwest quarter of Section 8. We have the foUowing comments m <br />regards to engmeering matters. <br />1. Access: Proposed access locations for Lots 1 and 2 should be shown on the plans and submitted to <br />Hennepin County for their review. <br />2. Grading: A grading and erosion control plan for the entire site should be submitted for review. <br />Removing the existing bituminous/concrete walkway to the lake on Lot 3 will create an.erosion concern. <br />This area should be restored immediately after the hardcover removal with fiber blanket and bale checks <br />or equivjdenL Erosion control nieasures should be in place prior to any grading or structure removal. <br />3. Drainage: The draft version of the City’s Comprehensive Storm Water Management Plan (SWMP) shows <br />that the site lies within the Stubbs Bay drainaae distri-L The site drains to the south and the north from <br />the high point on Lot 2. All flows ultimately reach North Arm. The bluff area along the lake and the <br />. existing topography of the site wiU make ponding difficult At a minimum we would recommend creating <br />a vegetated buffer strip along the top of the bluff to provide some water quality benefits. Final plans <br />should be submitted to the Minnehaha Creek Watershed District for their review. <br />4. Sanitary Sewer: Sanitary sewer to serve Lot 3 exists west of the existing home along the south property <br />line Lots 1 and 2 should be provided sanitary service from Tonkawa Road. The existing sanitary on <br />Tonkawa Road east of Lot 1 should be extended southerly approximately 100 feet to serve Lot 2. It is <br />unclear why there is an existing sanitary sewer easement shown across aU of Lot 1 and part of Lot 2. <br />Drainage and utility easements should be proyid^ 5 feet wide along all interior lot lines and 10 feet unde <br />along the roadway right-of-way. . • . • <br />5 Financial Guarantee: When the plans have been completed we can prepare an estimate of the total cost <br />for the site improvements to determine the amount of the financial guarantee required if the City so <br />desires. <br />Please contact me at (651) 604-4863 if you have any questions regarding this matter. <br />Yours very truly» „ <br />BONESTROO, ROSENE, ANDERLIK & ASSOCIATES, INC <br />Tom Kellogg <br />CC: Oreg Gappa, City of Orono <br />2335 West Highway 36 ■ St. Paul. MN 55113 ■ 651-636-4600 • Fax; 651-636-1311 <br />• .