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November 2004 – Central Arizona Project, CAP Rates: an example of government decision making about water use

    • Grady Gammage Jr.

      Senior Fellow at ASU's Morrison Institute and Board Member, Central Arizona Project

    • Ted Cooke

      Assistant General Manager, Central Arizona Project

    • Sid Wilson

      General Manager, Central Arizona Project



    Central Arizona Project (CAP) delivers Colorado River water to central and southern Arizona, including the metropolitan areas of Phoenix and Tucson.

    The Central Arizona Water Conservation District (CAWCD) serves as a quasi-governmental entity to manage the CAP and collect revenue to repay the federal cost of building the canal. Excess revenue is banked to provide capital improvement funding. Rates are set based on maintaining an appropriate level of reserve funds. This has led to low rates for its customers (municipal and industrial, federal, agricultural, and recharge).

    The retail cost of CAP water is approximately 0.03 cents per gallon, while the residential customer pays 0.15 cents to 0.26 cents per gallon. For comparison, Los Angeles charges 0.30 cents per gallon to its residential customers. The delivery charges account for 40% of CAP revenue, while power charges from the CAP-owned Navajo Generating Station in Northern Arizona account for another 23%. CAP also receives property taxes, air quality credits, capital charges, water storage taxes, and interest income. This diverse portfolio influences rate-making decisions. Along with that are considerations given to provide incentives for use and support for groundwater recharge. CAP’s priority of the Colorado River is last among the allocations on the river; therefore, CAWCD ensures that its entitlement is used to its fullest extent. Otherwise, competition from the other Lower Basin States may become a threat to future supplies.

    Presentation (2 MB pdf)

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