Agenda - Council - 09/25/2007 - Laserfiche WebLink

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Final Plat Review - Regency Pond 4th Addition September 20,2007 Page 2 of3 foot by 25-foot triangl~ of right-{)f-way on th~ sonthwest comer of this plat is needed for signal maintenance purposes; this must be shown on the final plat. Section 9.50.30 of City Code requires a cul-de-sac with a minimum right-{)f-way diame1er of \30 feet and a minimum roadway diame1er of 100 feet. A smJiller cul-de-sac. may be allowed, depending on . . anticipated traffic volume, planned function of the street, and character of abutting land use. Th~ Board of Adjustment gnmted a variance to allow a smaller cul-de-sac pavement and right-{)f-way on September 6, 2007. Since direct access to the pnblic roadway will be eliminated by dedication to Anoka County over Lots 2 and 3, it will be necessary to record an access easement between the four lots in this subdivision. . Utilities: The utility plan is being r~vi~wed as part of th~ site plan submittal for eN? Storage. The watermain through th~ site will be an. ~ight inch ductile iron watermain conn~cting between existing wat=ain on Bunker Lake Boul~vard and 148" Avenu~ in the Regency Pond subdivision. The City is requesting a drainage and utility easement over this watermaiu. This eas~ment must be a minimum of 20 feet in width. The sanitary sewer servic~s only this dev~lopmeut and is proposed to be as shallow as 4.3 feet in some.locations. The City's =dard requires 7.5 feet of cover over sanitary sewer without insulation. Staff is recommending thai this sanitary sewer be insulated and remain a private utility. Drainage and Grading: The 6.2-acre parcel is currently vacant except for a single family residence and several 011t buildings. At the present time the northeastern third of the property drains to the pond system located in we Regency Ponds 2m! Addition; the southern fuird of the property drains to a land-locked low area on We Connexus property on the south side of CR \16; and We eastem fuird drains into the storm water system installed in CR 56. The proposed plan will expand the Regency Ponds detention pond and transmit 98% of the site drainage to this ponding system. A grarling and drainage plan bas been prepared by RLK !nc and bas been reviewed. Staff offers the follo-wing comments: . Grading will be required on two of the adjacent lots in the Regency Pond neighborhood. Although Were are drainage and utility easements on these areas, contact should be made with these property oWI).ers prior to construction. . The number of outfalls into the detention pond should by minimized by interconnecting storm pipe on the east side of the development. . An emergency overflow elevation and location should be added to the plan . The plan will need to be reviewed and permitted by the Lower Rum River Wa1er Management Organization. . The adequacy of drainage and utility easements will be reviewed during review of the revised site plan submittal for eNP Storage Additional comments on the drainage and grading plans will be made based. on the revised site plan submittal for eNP Storage. -295-