Agenda - Council - 03/10/2009 - Laserfiche WebLink

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assessed for the improvement of Waco Street when it was paved in 1.993. Two of these eleven properties have their address and main frontage on 179`" Lane, The property at 4925 has its driveway located onto 179"' Lane and 4947 has it driveway onto Ute Ste very near the intersection with 179 Lane, PROPOSED IMPROVEMENTS It is proposed that a 24 foot wide bituminous pavement be constructed and located relative to the common property line as illustrated in Figure 2. This section has been determined to be the minimum necessary for providing emergency response for public safety equipment. This section will also require that parking be prohibited on both sides of the street. In addition a 10 foot drainage and utility easement will be obtained adjacent to the ri6 of way for the purpose of accommodating show storage and the installation and possible repair of the storm sewer, The pavement will consist of four inches of G.ltiss 5 granular base, two inches of bituminous base course, and 1.5 inches of bituminous wear course. The basic project proposes that 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. An alternate concrete curb and gutter would provide a more durable curb having a substantially longer service life and improved appearance. The concrete; curb will require a higher initial cost, Care will be taken to match the finished grade of the paved roadway as closely as possible to the existing grades to minimize the Width of the construction disturbance. The existing dead end turn around will be expanded to a bulb having a diameter of 60 feet. While this dimension is less than the current 100 foot diameter required on new development, it has been used successfully in instances where minimal areas for turnarounds are available. Additional right of way will need to be acquired to facilitate this bulb including an adjacent 10 foot drainage and utility easement. 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 on Me Street are at the north and south ends of the project area, a15 inch storm sewer will be installed the length or the street and will transport runoff to a point near the common lot line of 18015 and 18001. Three inlets from existing low areas on the south end of the project will be installed to accept drainage from yards that are currently experiencing standing water conditions after rain or snow rnelt events. Water quality standards require that collected storm water be treated to remove pollutants prior to being discharged into a public water body, Since Roger Fake is a natural environment lake, a water treatment manhole will be installed at this location and them discharge into the lake. A drainage and utility easement will need to be acquired to facilitate the installation and maintenance of this discharge pipe into the lake. _3_ —275—