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    • Ruby Dam Rehabilitation Phase 1 & 2 (2011 & 2014) DNRC

    Ruby_Location.PNG

    Ruby Dam History

    • Earthen embankment dam built in 1938, by State WaterConservation Board
    • Dam owned by DNRC, operated and maintained by Ruby Water Users Association since 1938
    • Primary purpose(s): Irrigation, recreation, stream flow regulation
    • Dam Height: 113 feet
    • Dam Storage: 37,642 acre-feet
    • Dam Classification: High Hazard

    Project History

    Past dam inspections noted significant concrete deterioration in the spillway floors, joints and walls. There was the potential for both erosion of the spillway foundation and uplift of the spillway slabs due to seepage. Additionally, the operating gate was prone to cavitation damage and incapable of meeting reservoir evacuation criteria.

    A feasibility study to evaluate rehabilitation alternatives was completed in 2007 and funded by the DNRC. After this study and other analyses, specific rehabiltiation efforts were determined. Rehabilitation was accomplished in two phases, due to the large size of the project.

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    Work Breakdown

    Phase 1

    • Replacing spillway
    • Development of maintenance access road

    Phase 2

    • New outlet works conduit
    • New operating and guard gates
    • New gate house
    		 Ruby_Breakdown.PNG

     

     

    Project Funding

    The total cost of the project was $17.1 Million. To finance the project, the DNRC used the following programs:

    • DNRC RRGL Grant: $100,000
    • DNRC RRGL Loans:
      • $4 Million, 15 years @ 4.5%
        • To be repaid by SWP
      • $2 Million, 15 years @ 3.5%
    • DNRC RRGL Loan: $2 Million
      • 20 years @ 4.5%
      • To be repaid by Ruby Water Users Association
        • Rate increases were necessary for water users which roughly quadrupled previous rates
        • Overall, the water users association was pleased with the end result of the project
    • State Funds: $9 Million
      • Only available to SWP owned facilities
    		 Ruby_Funding.PNG

    Project Status & Results

    • Phase 1 of the project began in August of 2010 and was complete in December 2011
    • Phase 2 of the project began in 2013 and was substantially complete of 2014

    Project Partners

          Owner: DNRC

          Lead Design Engineer: AECOM (URS)

          Prime Contractor: Johnson-Wilson Constructors

          Construction Oversight: AECOM (URS), DNRC