Agenda - Council - 12/08/2009 - Laserfiche WebLink

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two inches of bituminous base course, and 1.5 inches of bituminous wear course. This section has been established as minimum standards for the paving of existing roadways within the City and is four feet narrower than the city requirement for new streets. The short segments of 151 st and 1520d Avenues which are currently paved to a 20 foot width shall be widened, eight feet and shall receive a 1 1Iz inch bituminous wear course overlay. The street will be constructed with 4 inch bituminous curbs. The installation of a roadside ditch system was not considered as it would require disturbing a minimum of 14 feet behind the edge of the pavement to accommodate the back slope of the ditch. A copy of a typical cross section of the proposed roadway is included in Figure 2. Due to large elevation difference on opposite sides of the street the cross section of the street may be super elevated in some locations (one curb line beilig higher than the opposite curb line with drainage flowing across the street rather than from centerline to each curb). It is also proposed that the existing dead end located on the west end of 152nd Avenue be eliminated by connecting this roadway to the portion of 1520d Avenue stubbed from the adjacent Meadows subdivision to the west. This street modification is consistent with City planning goal to connect neighborhoods. This connection is being proposed to facilitate a City goal of connecting adjacent neighborhoods and improving access choices. Right of way will need to be'acquired for the 152nd connection. At some point in the future the access of 15211d A venue onto TH 47 should be closed to conform to the access plan for TH 47. However closure at this time is not included within the scope of the improvement due to the fact that it would force traftk entering the neighborhood from southbound TH 47 make a difficult u-turn at the intersection with 149th Lane. In addition this intersection is not well suited to other turning movements as well. Drainage of the streets will be provided through a system of storm water catch basins and storm sewer pipes as illustrated in Figure 3. A yard drain and 15 inch storm sewer will be installed to pick up drainage from the Brandseth subdivision to the north. It is proposed that a storm water detention basin be constructed on the rear of one or two lots south of 15211d A venue to provide the necessary water quality treatment prior to being discharged ' into DNR protected wetland 729 W. Storm water from the project area ultimately flows into the Rum River through a series of wetlands and pipes. Drainage and utility easements will need to be obtained for the storm water detention pond and drain installation across private property.. This project will not include the installation of City sewer and water which is available adjacent to the project area along the St Francis boulevard frontage road. The previous project proposed in 2003 included this element and was rejected by a petition from a majority of the property owners. Should a future sewer and water project be desired, the cost of replacing the pavement shall be considered a cost associated with the utility improvements which the City does not support with its general funds, This project will propose connecting existing driveways to the newly paved streets. In instances where there is no existing paved driveway a bituminous apron will be constructed from the edge of the roadway to the property line to prevent tracking onto the street. Property owners will be cont~cted individually to determine the desired material Revised 11-09 Page 3