Alpine Aqueduct Reach 1
Replacement and Resiliency Project

History of the Alpine Aqueduct Reach 1 Pipeline (AA-1)

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Since its installation in 1979 and 1980, the AA-1 pipeline has faced repeated damage from landslides, ground movement, and other geological hazards. This timeline highlights the major events and repairs that have shaped the pipeline’s history and helps to provide context to why a realignment is necessary to ensure long-term reliability and safety moving forward.