07-15-2002 Planning Packet - Laserfiche WebLink

Home Browse Search

^ 1 Bonestroo Bosene V ■ Anderlik & I Associates Engineers & Architects May 9.2002 Mr. Mike Gaffron Planning Director City of Orono Post Office Box 66 Crystal Bay. MN 55323 FBoncitroo. Roicne. Anderlik and Atiociates. Inc. It an Affirmative Action, Equal Opportunity Employer and Employee Owned Principals: Otto G flenestroo PE • V.irvinL Sorvaia. P£ • Giern R Cook P£ • TcOe^t G Schunicht P£ • Jrff/ A Bjurdon P£ Senior Coniultantt: RoPert W Rosene. P£ • Joseph C Anderlik. P£ • Richard £ rur.*er Pf • Susan V £t>erfm. C PA Associate Principals: Keith A Gordon. Pf. • Robert R Pfeffene PE • Richard W Foster Pf • David O Loskoia PE • Mark A Hanson Pf • Michael T Rautmann. P£ • Ted K field. Pf • Kervseih P Anderson, Pf • M.irn R Rolfs. P£ • David A Bonestroo MB A • Sidney P Williamson. P£ . L S • Agnes M Ring MB A • Allan Rick Schmidt P£ • Thomas W Peterson PC • James R Maland »*£ • Miles B Jenicn. P£ • L Phiit.p Gravel ill Pf • Daniel J Edgerton Pf • Ismael Martinez Pf • Thomas A Syfko Pf • Sz^eidon J Johnson • Dale A Grove Pf • Thomas A Roushar. P£ • Robert J Uevery P£ Offices: St Paul St Cloud Rochester and Wilimar MN • Milwaukee Wl • Chicago It VMrbsite; www bonestroo com ^^jATthAg/siTir Arif- ^ i ttvC i Rc: - Orono Pla/a PUD Concept Plan File No. 139-02-000 Plat No. 02-2789 Dear Mike: We have reviewed Ihe PUD concept plan for the proposed Orono Pla/a do vclopmcni The site is locnicd in *he northwest quadrant ot the intersection of Willow Drive and TH 12. The proposal provides for a mix of residential houMPg and commercial development. We have the following comments in regards to engineering mailers. ]. Sanitary Sew er: Sanitary sewer flovv^ from the sue will be rouicd ic an existing saniiar;. sewer along ihc nonh sule of TH 12. The existing sanitary sewer then flows southerly under TH 12 through a line just west of the Golf Dome property. This line serves an area north of TH 12 including the public schools along Old Cry stal Bay Road, the NV illou \ lew subdivision and the Medina Morningside neighborhood in NIedina. Prior to the consiniciion of the new Orono Middle School this sanitary line was nearly at capacity. The City recently constructed a bypass lift station along the south side of T.H. 12 to provide temporary relief for the additional flows generated by the school. During peak flow limes the bypass lift station pumps into an existing MCES forcemain along the Nouih side of TH 12. The lift station was an interim measure and will remain in operation until the downstream infrastructure is upgraded to provide the necessary capacity. Currently the system is at capacity and cannot accummvHJaic the additional flows generated by the proposed development until the system is upgraded downstream from the bypass lift station. Improvements to the existing sanitary line between the bypass lift station and the railroad tracks to the south would need to be a City project. The applicant should review costs for these impiovemeni^ with the City It is cur understanding the system along the railroad tracks and lo the cast will be upgr.idcd as par of the propey:d .MNMX)T IH 1^ improvement project. MN/DOT should be consulted to determine when the proposed sanitary sewer improvements will be completed and to verify that the necessary capacity will t>e provided Sar.uar.v sewer shall be in installed in accordance with City standard deiaiis. Final plans should include plan and profile views of all saniiaA^ sewer. 2. ater Main; The propc>scd w ater m.ain from west to exst should l^e 12 ” DIP. The liignment of the 12 * mam should follow’the alignment of the proposed Kelley Parkway. Water mam design thro’jghoui the .es: of the project appears acceptable. The two water mam laterals serving the units north of Kelley Parkway should be looped Final plans should include plan and profile views of the proposed water mam. water main dciafs and service locations 3. Storm Sevstr: The draft version of the City's Surface Water Management Plan (SWMP) ^hows that this site lies w ithin the Long Lake drainage district. The narrative prov ided w iih the application propo>es to expand the existing M.\'/DOT ponds ah>ng the south side of the sue As pari of the expansion the improvements propase to lower the normal water level of the pond by installing a new outlet pipe approximately 3-feei lower than the existing outlet pipe The existing pond outlet pipe discharges on the south side of TH 12 Storm water then flows overland through a tlrainage ditch along the west side ot the Golt Dome property The drainage ditch is very flat and the Golf Dome experiences occasional flooding during heavy ram events. The developer should provide additional infomiationosto where and at what elevation the proposed outlet will discharge south of TH 12. A minimum of 2-feet of freeboard should be prov ided between all basement cIcvationF and pond high water levels. The City has ‘^lorm sewer near the propiised westerly pond .Additional details such as connections to the City storm sewer, proposed emergency overflows and discharge ptunts should be provided for the pond along the wot boundary All storm ^ewer within 2335 West Highway 36 • St. Paul. MN 55113 ■ 65F636-4600 • Fax. 65F636-I31I