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Mounds View, Minnesota Project No: 435-07000-0 <br />Pedestrian Bridge Re-use Page 2 <br />OPTIONS <br />The two primary options for dealing with the stored bridges are 1) re-use the bridges at new locations <br />within Mounds View, and 2) sell the bridges. <br />Re-use of the bridges will be discussed in detail later in this report. If the City chose to sell the bridges, a <br />rough estimate of their resale value would probably be in the range of $10,000 to $15,000 each. This <br />resale value is based on an estimated cost of approximately $30,000 for each bridge if they were to be <br />purchased new. There would be no guarantee of finding a willing buyer, as the geometry of the bridges <br />would need to be an exact match for the buyer’s site requirements. <br />RE-USE BRIDGES <br />Re-using the bridges is feasible, provided the new locations match the bridge geometry. The process that <br />would need to be followed involves several tasks, including both design and construction phases. The <br />following is a brief discussion of the tasks that are typically required for the design and construction of a <br />pedestrian bridge crossing, along with estimated costs for each task. <br />DESIGN (PRE-CONSTRUCTION) TASKS <br />x Site Survey. Determine topography, locate utilities and possible construction conflicts, define <br />floodplain for hydraulic analysis. <br />x Wetland Delineation. Determine presence and type of wetlands that could be impacted by <br />construction. <br />x Geotechnical Exploration. Determine subsurface soil conditions and obtain recommendations for <br />bridge foundation support. <br />x Hydraulic Analysis. Determine effect structure will have on channel flow, and possible impacts to <br />floodplain zoning. <br />x Hazardous Materials Investigation. If replacing an existing structure, conduct an investigation to <br />determine presence and disposal requirements of hazardous materials. <br />x Structure Design. Design concrete abutments, prepare construction plan sheets, prepare <br />construction specifications, thorough inspection of existing bridges, coordinate inclusion of <br />salvaged bridge superstructure. <br />CONSTRUCTION TASKS <br />x Deliver Bridge. Bridge must be moved from storage location to new project location. <br />x Abutment Construction. Build new concrete abutments to support bridge, including excavation, <br />backfill, and placement of riprap for scour protection. <br />x Drive Piling. Mobilize pile driving equipment, furnish and drive piling (piling may or may not be <br />required, depending on results of geotechnical exploration). <br />x Install Bridge. Install existing bridge onto new abutments. <br />x Redeck. Replace worn timber decking with new naturally durable timber decking. <br />x Construction Administration. Construction survey, observe and document construction activities, <br />review payment submittals from contractor, and coordination as necessary with the City.