Authorized and constructed pursuant to the Boulder Canyon Project Act, the All-American Canal (AAC) is operated and maintained by the Imperial Irrigation District (IID) under a contract with the United States Bureau of Reclamation  (USBR). The AAC is currently unlined, resulting in substantial losses to seepage. The All-American Canal Lining Project (Project) will result in the concrete lining of 23 miles of the unlined AAC.

The Project consists of the planning; environmental compliance and permitting activities; preparation of schedules, plans, specifications and cost estimates; administration; design; construction; and implementation of environmental mitigation measures required to construct a 23-mile concrete lined canal parallel to the existing earthen canal, from one mile west of Pilot Knob to Drop 3. The new concrete lined section of the AAC will result in the conservation of 67,700 acre-feet per year of Colorado River water currently lost to seepage.

The new section of concrete lined AAC will be constructed parallel to the existing AAC alignment using conventional construction methods and will permit the current unlined section of the AAC to remain in service and to provide normal water deliveries to IID customers during construction. Upon completion of the Project, IID will operate and maintain the Project in accordance with its existing contract with USBR.

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