2020 Annual Report
Diversification and
Operation
Critical repairs were made on large-diameter pipes to ensure regional water supplies remained safe and reliable. During all construction projects, efforts are made to mitigate impacts to nearby communities and the environment.
Emergency Aqueduct Repairs Completed in North County
Pipeline 4 in North County was successfully repaired and returned to service after a leak was detected in Moosa Canyon. Crews installed bulkheads in the 90-inch diameter pipeline to isolate the leak area for repairs, allowing the pipeline to continue treated water deliveries throughout the county in a modified fashion. The work – completed in November 2019 after two months of modified operation — was a testament to the Water Authority’s proactive asset management program, which is a national leader in innovation. The Water Authority, in close collaboration with member agencies, installed a carbon fiber liner inside Pipeline 4 to give it several more years of service while a longer-term solution is developed and implemented. By relining the pipes and conducting timely repairs with the latest technology, the Water Authority has avoided major pipeline failures for more than a decade. The agency operates 310 miles of large-diameter pipelines, along with 1,600 aqueduct-related structures, and approximately 100 metering/flow-control facilities.
“The shutdown and repair work went smoothly, and we could not have done it without the support and coordination from Water Authority staff, our contractors and member agencies, particularly, Fallbrook PUD, Rainbow MWD, Valley Center MWD, and Vallecitos Water District.”
Water Authority