relief valve

Last month, a pressure relief valve on a surge tank stuck open, causing hundreds of thousands of gallons of wastewater to spill onto the street.

Wonderful is also touting plans for a six-lane highway, the Central Valley Green Pass, that would act as a relief valve for Highway 99.

"Combined storm overflows are a pressure relief valve for the wastewater network," NI Water's Director of Engineering and Sustainability Gary Curran explained.

The interest forgiveness would be a one-time benefit, but would be the largest relief valve in the plan.

The river was so swollen with floodwaters in May that officials opened a rarely used relief valve, routing some of the water into the California Aqueduct to be used in Southern California.