03-09-1998 Council Packet - Laserfiche WebLink

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r BONESTROO AND ASSOCIATES ^612 6361311 02/12/98 12:59 0 :02/0A NO:957 : I if I Bonestroo Rosene Andertik & Associates Engineers & Architects ••ij /i'f'xr fu- i .if • f»i, •. »•» •!••• fi / »•, * .•*! •! I j ^ .I < ••• t*t • . f. . i.» I I • II . . I . • ii.« • I • (Cl* h.ii.1 f Tii» iir*i r f • »*?» (»i I !•* I. -t I ’I • f* I♦ I *,i r I »i II• f •? *'► • I. »• j t, I •• I f*• vV f i.'.r ni r» \i * vT V ! f»* t • f* » % • r*iiH •••»5 4»*«!• i.ir** V/1/'*//»,»;* N•^A »i I 'v i.t'ift.t.l 1*1 • •% • ■ » | • * i% ’**• I i • 1*1.'n Mtf VI.' TL • D.i% III O I \nii • f» • • i .\ • M,« • A »lii*»i.»' *• • V»rr..n/» I PI • Vii K I .-Iff rf • •.-. f.. •». M fl f ..,i| i*i • •*».*fii ^ M a Ht I s • Ti. L« 'I f .»MI»»' *.• *.|» f U iru.ii .»iij ji t. Iciivl ’■ *A ' Fcbiiuiry 12. 1998 Mr. Michael P. Gaffron St'nior Planning Coorilinalor City of Orono Po>t Office Box 66 Cry.stiil Bay. MN 55.123 Re: Andersen Subdivision File No. 139-2.M1 Dear .Mike: We have reviewed the preliniinury plat for the propo.sed .seven lot Andersen subdivision. The site is located west of Old Crystal Bay Ro.td South (C.R. 84) in the northwest quarter of .Section 0. We have the following comments in regards to engineering matters 1. Access: The sight dtstance.s at this l(x:aiion appear to be adequate. A rock constmetion entrance to the site should be installed and maintained throughout the construction period until the Class 5 is in place. The proposed access onto County Ro.id 84 should be reviewed by Hennepin County. Streets: The proposed .street design meets City requircincnis for street width and cul-de-sac length for a private road serving 7 or more units. Tlie propo.sed 125 fool horizontal curve across Oiiiloi A should be a minimum of 275 feet to meet a 30 mph design speed as set forth hy City code. Geotechnical recommeiulations should lx: submitted to verify the proposed typical street section. Final plans and specifications, including street and storm sewer dc.sign and profilc.s, should be submitted to the City prior to construction. .Street and utility record plans should be provided to the City after project completion. 3. Grnding: The grading plan appe.iis accept.ihle. Fxisting driveway remoxal and excavation for the street will result in ciosmn concerns during construction Additional ertrsion contiol measures should be installed along Conniy Road 84 prior to construction and remain in place until the street has been pa-»*tl and vegetation is e.slabli.shed Home and septic system construction will require additional erosion control measures 4. Drainage: In accordance with the draft version ot the City’s Comprehensive Storm W'ater Management Plan (SWMP). 've recommend that a storm water tiualiiy pond to treat mnoff prior to discharging into tlic lake be constructed on site. A drainage area map and drainage culculations .should be provided with the final plan .set Plans should be submiued to the Minnehaha Creek Waler.shed District and Henneptn County for their review. 5. Iva.sement.s: niusciiienis shown appear to be acceplahle. Drain.ige easeniL*nis should be piovided across all wetland, drainage way and pond areas._____________________________________ 2335 VX/e$t Highway 36 • 5t. P^^ul, MN SS113 • 612-636-4600 • Fax: 612-636*1311 J