06-16-1997 Planning Packet - Laserfiche WebLink

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^ m Bonestroo Rosene Anderlik& |\ I Associates Engineers & Architects Bones:roo. Rosene. AnderUk and Assocuttes. Inc ts an Affirmative Action, Equal Opportunity Employer Rrmapats Otto G Bonestroo. PE • Joseph C Anderlik. PE • Marvin L Sorvala. PE • Richard E Turner, PE • Giersn R Cook. PE • Tr>omas E Noyes. PE • Robert G Schunichi PE • Jerry A Bourdon. PE • Robert W Rosene, PE and Susar> M Eber(m. C PA . Senior Consultants Associate Principals Howard A Sanford. PE • Keith A Gordon. PE • Robert R Pfefferie. PE • Richard W Poster. PE • David O Loskota. PE ■ Robert C Russek. A I.A. • Mark A. Hanson. PE • Michaei T Rautmann. PE • Ted K Field. PE • Kenr>eth P Anderson. PE • Mark R Rolfs. PE • Sidney P Williamson. PE . L S • Robert F Kotsmith Offices St Paul Rochester, Willmar and St Cloud. MN • Mequoa Wl May 15,1997 Mr. Michael P. Gaffron Assistant Building and Zoning Administrator City of Orono Post Office Box 66 Crystal Bay, Minnesota 55323 Re: Hi^view Site Sketch Plan File No. 139-2240 KiM 1 6 W97 Dear Mike, We have reviewed the sketch plan prepared for Jim Waters on the proposed Garden Lane Site, a subdivision of PID Numbers 07-117-23-22-0008, 07-117-23-22-0007, 07-117-23-22-0017 and 07-117-23-21-0002, located south of County Road 151 in the northwest quarter of Section 7. There are several issues that need to be addressed relative to engineering matters and included with the plan. 1. Utilities: The current MUSA boundary includes Lots (8) and (7) and excludes Lots (17) and (2). It appears that including Lots (2) and (17) into the MUSA area would be a logical assumption from an engineering standpoint The slopes in these areas would make it difficult to find two suitable septic sites on a two-acre lot A sanitary sewer will need to be extended north and west from Wildhurst Trail. Plans and specifications should be prepared for the sanitary sewer, with as-built plans provided to the City upon completion. Please note there is no municipal water service available for this area. Each lot will be required to be served by a well. 2. Streets: City code specifies a maximum length of 1000 feet and ten units on a cul-de-sac. All streets require a 30-MPH design speed and a 275-foot centerline radius. Neither of the two concept sketches meets these requirements. No more than two units may be served from a private driveway. Private streets serving three to seven units must be paved 24 feet wide, more than seven units require 28 feet. Public streets serving three to ten units must be paved 28 feet wide, more than ten units require 32 feet. All streets require 50 feet of right-of-way. Due to the existing topography on the site it may be impossible to meet all of the code requirements. A shorter centerline radius could be mitigated by placing curve ahead warning signs at both ends of the curve. It may be possible to shorten the cul-de-sac or liimt the number of units on the private driveway on sketch 1 by constructing another cul-de-sac south between lots 14 and 15. Or, construct a driveway within the Highview Lane right-of-way from Wildhurst Trail to lots 14 and 15. Public safety issue will need to be addressed. How will the fire department fight a fire in this area without hydrants? Where is the nearest water supply to fill tankers? From a safety and access standpoint, it would be very beneficial to make a street connection from West Branch Road (C.R. 151) to this development. 3. Grading: Once an acceptable concept sketch has been prepared, a grading, drrunage and erosion control plan should be prepared that shows both the existing and proposed contours, building pad locations and elevations, and erosion control measures to be used during construction. Plans should be prepared for the street and storm sewer construction. 2335 West Highway 36 > St. Paul. MN 55113*3898 • 612-636*4600