C153835A Feasibility Study

• Contract/PO #: C153835A
• Contractor Name: Greeley and Loveland Irrigation Company
• Contract Type: Loan
• Water District: 3
• County: Weld
• Bill Number: HB 98-1189
• Loan Projects - Doc Type: Feasibility Study

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non-structural options were considered. There are three structural alternatives and one non-structural

alternative. The first structural alternative is repairing problem areas of the existing canal. The

second structural alternative involves lining the existing canal geometry with concrete. The third

structural alternative involves reshaping the existing canal cross sections and lining defined areas with

concrete. The non-structural alternative involves leaving the existing structure in place with no

repairs. Photographs of Upper Greeley and Loveland Canal are located in Appendix B.

Plan B 1 - Existing Canal Rehabilitation
The first alternative studied was rehabilitating the existing canal to eliminate seepage
discovered during the field investigation. The seepage is located on a benched section of the canal
between Taft Avenue and 1" Street. This alternative includes placing concrete lining from Taft
Avenue Bridge to the 1" Street Bridge. No other modifications are required for this alternative. The
maximum canying capacity of the existing canal system is approximately 200 cfs. Rehabilitation of
the existing canal would not increase the discharge capacity of the canal.

Plan B 2 - Concrete Line Canal for Existing Geometry
The second alternative studied consists of lining the entire length of the existing canal with
concrete. Under this option no modification of the cross sections are required except for canal
reshaping for placing the concrete lining. Existing canal sections containing concrete would also be
removed and replaced. The discharge capacity for this alternative would increase to 300 cfs.

Plan B 3 - Concrete Line Canal for Decreed ClIpacity
The third alternative includes modifYing the canal geometry and replacing the existing
concrete lining. In order to pass the decreed flow of 446 cfs through the upper Greeley and Loveland
Canal system, the cross sections of the canal would have to be modified. The modifications include
enlarging the bottom width to 20 feet and reshaping the side slopes to 1.5H: 1.0V. The cross sections
at bridge openings would not need to be modified under this option. In areas where the existing canal
is lined, the modification would include removing the existing concrete, reshaping the channel cross
section, and relining the channel with concrete. The rehabilitation would increase the water surface

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