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 fact that the railroad cannot be shut down for more than six hours at a time and any work must occur essentially while the railroad is in continuous service. Additionally, a 42" reinforced concrete raw water pipeline owned by the City of Greeley must be protected and further complicates the work. The pipeline was constructed in 1968 and is positioned along the centerline of the Dry Creek Canal. The pipeline was bored under and parallel to the SLRC culvert structure. Any improvement made in this area should recognize that this pipeline will need service or replacement in the future and the proposed improvements should not make this work anymore difficult for the City of Greeley. 5 Alternatives were developed to address SLRC's two main objectives and are described as follows: Dry Creek Railroad Culvert Alternatives 1. No-action Alternative. This alternative is not recommended since the existing restriction causes significant operational problems for both SLRC and GLlC in the diversion and storage of water. Additionally, the age and condition of the exiting culverts needs to be addressed to avoid potential safety problems with the railroad operation and avoidance of lose of flow capacity between Lake Loveland and Horseshoe Reservoir. The no action alternative in this case is more costly than appropriate rehabilitation alternatives. The no-action alternative would result in an inability of the Company to divert water that it is legally entitled to. 2. Tunneling Alternative. This alternative involving tunneling through the existing culvert structure under the railroad. This alternative would require two 120" bores and additional concrete work for new headwalls, wingwalls and miscellaneous demolition of the existing structure. The estimated construction cost for this alternative is $1,420,155.