Optimizer™ allows the City of San Diego to reduce the cost of planned pipe replacements, while improving water quality.
The City of San Diego has experienced a significant number of water main breaks, due in large part to the City’s aging water infrastructure. In addition to the need for replacement, repair and upgrades of all aging assets, the City is undertaking a program focused on replacement of cast iron and asbestos concrete pipes.
“In addition to reducing the cost of cast iron main replacement, the system has been optimized to provide fire flow without being overconservative. The existing system is capable of providing more than the maximum fire flow rate in some areas. This leads to water quality problems. The refined pipe sizes greatly reduce the number of oversized pipes, while improving the available flow at hydrants that have low capacity.”
With Optimatics, better water comes at a reduced price.
The comprehensive Optimizer analysis allowed the City to minimize the cost of their extensive replacement program, while comprehensively addressing complex design criteria. The design criteria ensure the network is robust against seismic activity by satisfying maximum day plus fire flow demand with a key supply pipe to the fire hydrant assumed to be out of service. Over 1700 fire flow events were evaluated in the optimization.
Optimizer has enabled the City to identify replacement plans that have been 10-30% more cost effective than like-for-like replacement of assets. In addition, the analysis ensures the overall hydraulic capacity of the system is optimized, improving water quality by reducing excess capacity in some areas while increasing hydraulic capacity in areas of need.
PIPE REPLACEMENT PLANNING OPTIMIZATION.
Pipe condition assessment and failure risk analyses ensure replacements are sized to meet current and future system requirements at least cost.
By allowing planners to capitalize on replacements to add capacity or reduce costs with trenchless techniques, Optimatics and the optimization process give incredible returns on investment.