C150242 Feasibility Study

• Contract/PO #: C150242
• Contractor Name: Seven Lakes Reservoir Company
• Contract Type: Loan
• Water District: 0
• County: Larimer
• County: Weld
• Loan Projects - Doc Type: Feasibility Study

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Chapter IV - Formulation of Alternatives

A. Discussion of Alternatives

Gauthiere Engineering Inc. has developed alternatives, which meet the project
purpose of replacement of the Dry Creek railroad crossing culvert structure for the
Seven Lakes Reservoir Company inlet to Horseshoe Reservoir. The alternatives
were formulated to address the problems described in Chapter III of this Feasibility
Study.
Three alternatives were analyzed in the feasibility study:

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 existing culverts needs to
be addressed to avoid potential safety problems with the railroad
operation and avoidance of loss 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, was
investigated. 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.

3. Main Tracks Temporary Relocation Alternative - An alternative
to temporarily relocate the main train track and install new culverts
was investigated. This would involve the temporary construction of

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