11 - Laserfiche WebLink

FINANCIAL STATEMENT The original project costs are approximately $2 million. These funds are currently in the Capital Improvement Program. Total additional project costs for the City if undergrounding is added are estimated to be between $2.5 million and $3 million, which includes design cost, utility approvals and 60%-80% of the construction cost (which is shared with the utility companies). Approximately $400,000 of this cost would be required to redesign the project with undergrounding. No source of funds for the additional costs for undergrounding has been identified. Once public bids are received, staff will have a more accurate estimate of the construction costs for the project and Council will be able to make a more informed decision to either move ahead with undergrounding or complete the project as originally planned. The underground utility district improvements, once accepted by the public utility companies, will be operated and maintained by the respective utility companies and have no financial impact on City maintenance and operation costs. BACKGROUND Project Description The original Stanley Boulevard roadway was constructed in the late 1800's. The customary design at that time was to elevate the roadways higher than adjacent properties to keep them high and dry. As a result, the current roadway is higher than the adjacent properties. In addition to performing a transportation function, modern roadways are designed to perform the secondary function of collecting and conveying storm flows. Storm runoff from properties adjacent to a roadway typically drain to the street where public roadway and private storm water is collected in the gutter-pan and conveyed to catch basins which funnel storm waters below ground and off of the roadway system. On Stanley Boulevard, because of the difference in elevation between the roadway and the adjacent properties, the project design includes lowering portions of the street grade by approximately 1 foot to ensure the necessary positive drainage from the private properties onto the street surface. This involves removing the original concrete cement roadway under the existing roadway pavement and re-establishing a standard roadway street cross slope of 2 percent. This approach, including the addition of curb and gutter and minor storm drain facilities, will capture all storm drain runoff falling directly onto the public roadway. At some locations on Stanley Boulevard, the private property elevations are significantly lower (3 to 4 feet) than the existing and proposed street grade, and lowering the roadway surface to accommodate these properties is not practical. During the design process for the street roadway section, several design challenges were encountered which influenced the final roadway horizontal alignment. The design challenges included designing around the location of existing power poles, heritage trees, private hedges, mailboxes, decorative driveways, and fences within the public right-of-way. Other challenges included the removal of the concrete slab under the roadway, conforming the driveways to lower adjacent properties, and providing for Page 2 of 7