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Metropolitan Water District begins sensor installations on Delta islands; meters and maintenance carry notable costs

Delta Measurement Experimental Consortium (convened by Office of the Delta Watermaster / State Water Board) · December 2, 2025
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Summary

Metropolitan Water District reported initial deployment of low-density sensors on Bridal/Bolden Island, plans to install meters on pump-discharge pipes this summer, and preliminary cost estimates: 25 meters staged, about 88 meters planned, maintenance roughly $170,000–$200,000 per year and capital meter costs ranging widely by size.

The Metropolitan Water District of Southern California told the DMEC that its water-balance pilot is entering an installation phase and will combine low-density sensors with modeled elements to estimate net channel depletion and consumptive use.

Russ Ryan, a program manager with Metropolitan Water District, said the pilot includes five low-density sensor locations on Bridal Island and an instrumented steady site at…

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