01-19-1999 Planning Packet - Laserfiche WebLink

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mm Bonestroo Rosene Anderlik & Associates Bonestroo. Rosene. Andertik snd Associates, fnc. is sn Afhrmouve Action. £qu.*i Opportunity impioyer Princtpsis: Otto G, Bonestroo. P£. • Joseph C. Anderlik. PE. • Marvin L Sorvaia. RE • Richard E. Turner. PE. • Glenn R. Cook. PE. • Rotert G Schunicht. PE. • Jerry A Bourdon. PE. • Robert W. Rose.ne. P.E. and Susan M. EOcrlin. C PA.. Senior Consultants Associate Principefs: Howard A. Sanford. PE • Keith A. Gordon. PE • Robert R. Pfefferfe. PE. • Richard W Foster. PE. • David O Loskota. PE • Robert C Russek. A.I.A. • Mark A. Hanson. PE. • Michael T. Rautmann. PE. • Ted K.Fleld. PE • Kenneth P Anderson. RE. • Mark R Rolfs. PE • Sidiiey P. Wiliiamsoa PX. LS. • Robert F. Kotsmith • Agnes M Ring • Michael P Rau. PE. • Allan Rick Schmidt. PE. Offices St Paul. Rochesifr. Willmar and St Cloud. MN • Milwaukee. Wl WeOsite: wwwisonestroo com Engineers & Architects December 30,1998 Elizabeth VanZomcren .................■ City Planner/Zoning Administrator City of Orono Post Office Box 66 Crystal Bay. MN 55323 Re:Mike Hilbelink Subdivision File No. 139-2449 Dear Liz: We have reviewed the preliminary plat for the proposed three-lot Hilbelink subdivision. The site is located east of Crystal Creek Road, west of Wear Lane and north of Watertown Road in the southwest quarter of Section 33. Wc have the following comments in regards to engineering matters. 1.Access: Access to Lot 3 is off of Watertown Road. The southerly 33 feet of Lot 3 should be dedicated as Watertown Road right-of-way. Access to Lots 1 and 2 is proposed to be off of Outlot B, an extension of Outlot A in the Crystal Creek subdivision. Crystal Creek Road is constructed within Outlot A and currently serves 11 properties in the Crystal Creek subdivision. A twelfth property (Lot 7, Block 1, Crystal Creek) is land locked and currently has no access. Crystal Creek Road is a private street that terminates in a cul-de-sac at the cast end of Outlot A near the northwest comer of the Hilbelink property. A storm sewer in the cul-de-sac conveys storm water to a pond west of the cul-de-sac in the Crystal Creek subdivision. The proposed extension of Ciystal Creek Road onto Outlot B presents the following concerns: •The existing and proposed lengths of the cul-de-sac, 1400 ’ and 1580' respectively, exceed the 1000-foot n. jcimum length of a cul-de-sac allowed by City code. •If Crystal Cr: ?k Road is extended, the roadway would serve fourteen properties. The maximum number of units serv^ by a cul-de-sac as defined by City code is ten. •Crystal Creek Road is a private street owned and maintained by the Crystal Creek properly owners. Use of the road by Lots 1 and 2 in the Hilbelink subdivision would require approval from the Crystal Creek property owners. •Access from the south .o Outlot B in the Crystal Creek subdivision would be severed by the creation of Outlot A in the Hilbelink subdivision. •Storm water runoff from a street constructed on Outlot B would drain to the existing storm sewer and pond in Crystal Creek. Additional storm sewer and ponding capacity may be necessary to accommodate flows from the Hilbelink property. •The termination of Outlot B as shown on the plan would make any future connection to streets east of the Hilbelink property difficult or impossible. Wc would anticipate that an extension of Outlot B to the cast would connect to an extended Wear Lane. 2.Grading: The location of the proposed septic sites relative to the existing wetland on the north end of Lo» 1 may make driveway construction to serve the property difficult or impossible without filling some of the wetland. Proposed driveway locations and elevations should be included in the plans. A grading and erosion control plan for the entire site should be submitted for review. Erosion control measures should be in place prior to any ^ uling. Additional erosion copirol will be needed during consu^clion of the homes and septic systems'. 3.Drainage: The site lies within the Lake Classen drainage disuict as shown in the draft version of the City s Surface Water Management Plan (SWMP). The southerly wetland on the property is identified as LC-P15 and classified as a moderately susceptible wetland in the City’s SWMP. We recommend constructing a water quality pond north of this wetland to treat runoff from the site and protect the wetland. The City’s SWMP also identifies a proposed 18" storm sewer conveying flows from the northeast to this pond/wctland area. We recommend that a drainage easement be acquired at this time for future construction of this storm sewer. A drainage area map. drainage and f 2335 West Highway 36 • St. Paul, MN 55113 • 612-636-4600 ■ Fax: 612-636-1311