11-16-1998 Planning Packet - Laserfiche WebLink

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Bones troo Rosene Anderlik & Associates SoreiTroo Ancerhs ;^nc / aoci^ta irc »s An Affirm.mve A^,t>on Opportunity Errploycr PrinciOA^s OttD G Bonesr'oo. PE • Joscpn C AncJeri * PE • %i*irvin L Sorv.ii»<. PE • P'cnjrd c Turner PE • Giern R Coov PE • RoDer: G Schunicht. PE • Jerry A Bourdcn PE Rotert 'Jt‘ Rosene pe and Susan V! EDerim. C PA Senior Consultants Asjocia:? PnrcipAii Howard A Sanford PE • Ke'tn A GorPor, P£ • Robert R Pfeffe'ie. PE • Ricnard W Foster PE •Oa.-dO LosJcota. PE • Robert C Posse's. A i A • Mar^c A Hanson. PE Michael T Rautmann PE • Ted K F e'd. «»E • Kenneth P Anderson. P£ • Mark R. Rolfs. PE • Sidney P WiHiamson PE . L 5 • Rooer» F Kotsmith • Agnes M Rmg • Michael ? Rau. PE • Allan Rick Schn*-dt PE Engineers & Architects November 9, 1998 Offices St Paul Roch Wtrbste w.vwoonesir. . r wtlirrar and S: Cloud. MN • M.i-.vauree, Wl :om Mr. Michael P. Gaffron, Senior Planning Coordinator City of Orono Post Office Bo.x 66 Crystal Bay, Minnesota 55323 Re; Sid Rebers, Outlot E File No. 139-2439 Dear Mike, We have reviewed the site plan for the proposed commercial development on Outlot E, Sugar Woods in the northwest quarter of Section 34. The site is located on the north side of Wayzata Boulevard (T.H. 12) just east of the Otten Brothers Nursery' site. The site is proposed to be developed as a single story office building. There are several engineering issues that will need to be addressed as part of the plan review process. 1. Traffic: The access is proposed to be constructed west of Outlot E on MnDOT right-of-way. Plans should be submitted to MnDOT for their review and approval. Grading: The grading plan should show all e,xisting contours within 100 feet of the site. It appears that grading on the east side of the site along the e.xisting parking lot may require a short retaining wall. A construction easement may also be necessary to constmet the parking lot and storm sewer so close to the easterly lot line. Some grades on the parking lot scale to more than 5 percent. We would recommend that parking lot grades not exceed 4 percent. 3.Drainage: It is unclear how the proposed stonn sewer at the access to the site is supposed to work. The catch basin is shown off the roadway in between a culvert and a concrete pipe. We would recommend that catch basins be located in the access roadway and lied into the proposed culvert. The culvert should then be connected to the existing 24 ” RCP. The proposed catch b;; in in the southeast comer of the parking lot has a proposed build of 2 feet. We recommend a minimum build of 2 Vz feet on any stonn sewer structure to allow adequate room for the pipe. We also recommend that the storm sewer downstream from the parking lot catch basin be tied into the existing downstream storm sewer rather than allowing the storm water to run overland. Storm sewer design including pipe sizes and grades should be provided on the plan set. A drainage area map and storm sewer calculations should be provided for our review. Capacities and ultimate outlet locations should be provided for the existing 30” and IS” storm sewers. Plans should be submitted to the Minnehaha Creek Watershed District for their review. 4. Utilities: Plans and specifications should be prepared for the water and sanitary service line connections, with as-built plans provided to the City upon completion. 5.Easements: Utility easements \sill need to be provided for the existing water main, sanitary' sewer and any other existing utilities located on the property. Based on a recent site visit, it appears that the existing water main along the west edge of the property is located 3 to 4 feet east of the lot line. We recommend that a 10-foot utility easement be acquired along the west lot line. A triangular shaped utility easement 2335 West Highway 36 - St. Paul, MN 55113 • 612-636*4600 • Fax; 612-636-1311