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Best Project – Water/Environment: First Aqueduct Tunnels Rehabilitation Project

When inspections discovered groundwater infiltration in three 72-in. aqueduct tunnels owned by the San Diego County Water Authority, a complex rehabilitation project became necessary. Those tunnels—Lilac Tunnel (500 ft), Red Mountain Tunnel (3,100 ft), and Oat Hills Tunnel (3,600 ft)—were originally built in 1947.

Aqueduct Shutdown Expected to Begin Nov. 4

The repair to the San Diego County Water Authority’s Pipeline 4 in Moosa Canyon will require a shutdown of the SDCWA aqueduct which is expected to begin Nov. 4, and the CWA’s actions also included a unanimous CWA board vote Oct. 24 to approve a change order in the CWA’s contract with Fibrwrap Construction Services, Inc.

The change order increases the contract by $140,409 to create a total contract amount of $1,011,751 while also amending the contract to increase the number of carbon fiber layers.