C150242 Feasibility Study - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I I 1 :300 feet of new track, the construction of 240' of 144" CMP, demolition of the existing culvert structure and replacement of the train track in its original position. The estimated construction cost for this alternative is $1,151,443. 4. New Railroad Bridge Alternative - An alternative to construct a new railroad bridge over Dry Creek and then demolish and remove the existing five-barrel culvert structure was investigated. Construction of the new bridge and removal of the existing culvert structure with appropriate erosion protection installed in the Dry Creek channel is estimated to cost $775,210. This is the recommended alternative. B. Selected Alternative Selected Alternative 4 consists of the following: This project approach will involve construction of a new railroad bridge while the track remains in continuous service. Since trains traveling on this section of tracks can be expected on a frequency of one about every six hours, close coordination between personnel building the new bridge and those responsible for scheduling and running the trains is critical. In discussions with BNSF Railroad personnel, it was determined that bridge support pilings could be driven during the time intervals when trains are not near the site. Pile caps could then be installed, rails, ties and ballast can then be removed and the prefabricated bridge would be installed. A conceptual design is shown on Sheet 2 of 2 (located in the map pocket). The implementation schedule calls for completion of financing arrangements and final design in Winter-Spring 2007. Construction would start in summer of 2007, and be completed in Fall 2007. 22