Press Release, Water Department
FOR IMMEDIATE RELEASE
January 29, 2001
Cell: (619) 980-1436
Mid-City Pipeline Half Complete
Underground Vault Construction Is Critical to Project
SAN DIEGO - The new millennium marks a construction milestone for the Mid-City Pipeline as work on the project is now 50 percent complete. Project construction during 2001 will include the installation of several vaults. A vault is a room-sized concrete box placed under ground. These structures are necessary to properly operate and maintain the $25 million water transmission pipeline when it enters service in early 2002.
Work on the San Diego County Water Authority valve vault, near 70th and El Cajon Boulevard, began this month. This structure will serve as the connection point between the 48-inch Mid-City Pipeline and the 108-inch Second San Diego Aqueduct. The vault measures approximately 30 feet square and will require an excavation about 30-feet deep. Construction requires traffic revisions on 70th Street near El Cajon Boulevard. These revisions began January 19 and will be in effect throughout vault construction, which will take up to three months to complete.
A pump-well vault near 69th Street and El Cajon Boulevard will provide access to the Water Authority inlet pipe, which extends from 70th and Amherst to the new County Water Authority Flow Control Facility located on El Cajon Boulevard between 68th and 69th streets. The structure will measure 10 feet by 6 feet. Construction on this vault is scheduled to begin toward the end of February and will take approximately two months to complete.
Two pressure reducing stations, one on Marlborough Avenue and one on Cherokee Avenue just south of El Cajon Boulevard, will facilitate the connection between a section of 20-inch Mid-City Pipeline and an existing 12-inch water distribution main. Work on the Cherokee Street vault is scheduled to begin in early March followed by work on the Marlborough Street vault. Each vault will take about three months to complete.
Two seismic vaults at 54th and El Cajon Boulevard will allow for the automatic shut-off of pipeline sections in the event of a seismic event. Each vault measures 18 feet by 12 feet and will be about 10 feet deep. Work is scheduled to begin towards the end of April and will take about three months to complete. This work will require traffic revisions in the immediate area on El Cajon Boulevard.
Weekly pre-recorded construction updates are available by calling (619) 229-9154. This information hotline is provided by the project contractor, PCL Civil Constructors, Inc.
Information about the 4.5 mile Mid-City Pipeline and other important water infrastructure projects is available online at www.sandiego.gov/water. You can also call the Mid-City Pipeline project information line at (619) 533-6637 for more information.