Agenda - Public Works Committee - 02/17/2009

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PROPOSED IMPROVEMENTS It is proposed that a 28 foot wide bituminous pavement be constructed in the center of the 63 foot right of way. This area has not been platted and easements contained within the recorded property descriptions differ between properties. Each property owner will be asked to sign a consistently worded document which reaffirms the dedication of the above roadway easements, The pavement will consist of four inches of class 5 granular base, 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 street will be constructed with 4 inch bituminous. curbs since the installation • of a roadside ditch system would require disturbing a minimum of.14 additional feet. beyond the.edge of the pavement to accommodate a roadside drainage: ditch. A copy of a typical cross section of the proposed roadway is included Figure 2 :.Care will be taken to match the finished grade of the paved roadway as closely as passible`to the. existing grades to minimize the width of the construction disturbance The existing dead end turn around will be expanded to a bulb h wing a diameter of 65. feet, While this dimension is less than the current.100,foot diarneter;retluired on new • development, it has been used successfully in Instances where minimal area for turnarounds are available. Additional right of way tivill need.to be acquired to facilitate this improvement, • Drainage will be provided through a system of storm water catch basins and storm sewer pipes as illustrated in Figure 3. Since the low points otn-Ute Street are at the north. and south ends of the project. area, 15 inch. storm sewer will be installed through the length of the street and wilt. transport rung #f to a point. near the common lot line of 18015 and 18043. Water quality standards.require that evl`lected storm water be treated to remove pollutants, prior to being discharged into a public water body, Since Roger Lake is a . natural environment lake, a watertreatment manhole will be installed at this location and their discharge into the lake. A drainage and utility easement will need to be acquired to facilitate theinstallation and maintenance of this discharge pipe into the lake. This project will connect 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 contacted individually to determine the desired material and width of the driveway approach, City standards allow up to a 30 feet wide driveway at the street in this zoning district (24 feet on cui de sac driveways). The pavement shall be neatly saw cut where a new portion of the driveway will meet the existing drive, Restoration shall include the protection or repair of any irrigation systems or invisible fence. Mail boxes may be relocated to accommodate construction but shall be returned to their original locations upon termination of the project. Disturbed turf areas shall be restored with salvaged topsoil, fertilizer, seed and mulch.