Del Puerto Canyon

Where Is the Del Puerto Canyon?

Del Puerto Canyon is located just west of the town of Patterson (which is 27 miles southeast of Tracy). It is in eastern Stanislaus County.

Why Is Del Puerto Canyon Threatened?

A water district has proposed to build an 800-acre agricultural reservoir that would store 82,000 acre-feet of water to irrigate agriculture in the San Joaquin Valley.

The proposed reservoir is located on important wildlife habitat in Del Puerto Canyon, which is part of the Diablo Range

The proposed reservoir would draw water from the Delta-Mendota Canal, which is part of the federal Central Valley project that regulates and stores water in the northern half of the state. Then the water would be transported to the San Joaquin Valley.

The Proposed Del Puerto Canyon Reservoir Would Destroy Rare Wildlife’s Habitat in the Diablo Range

The reservoir, if built, would drown a large portion of Del Puerto Canyon, a popular birding destination, and destroy more than 1,000 acres of grassland habitat and hundreds of acres of oak woodland, riparian, and other wetland habitat.

Rare and endangered species such as the San Joaquin kit fox, American badger, golden eagle, burrowing owl, California red-legged frog, foothill yellow-legged frog, and California tiger salamander would all be affected by this project. These species are just some of the wildlife that would be disrupted.

Reservoir Approved, Lawsuit Filed to Challenge It

The reservoir has been approved by the Del Puerto Water District. Save Mount Diablo has supported a lawsuit that challenges the project’s approval.

The lawsuit has been filed by the Sierra Club, Center for Biological Diversity, California Native Plant Society, and Friends of the River based on the inadequacies of the project’s environmental review.

We are also awaiting the release of the project’s federal environmental impact statement, expected sometime in the next few months, and will review and comment on it.

We continue to work with partners to challenge this project and increase the protection of wildlife and habitat in this part of the Diablo Range.

Join us to save the remaining natural lands of Mount Diablo!

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