Whittier Narrows Dam Safety

The Habitat Institute – Baseline Condition Field Data Collection Completed: June 17, 2017

Whittier Narrows Dam and Reservoir: Is a flood control and water conservation project constructed in 1957 operated by the Los Angeles District of the United States Army Corps of Engineers at the Whittier Narrows in Montebello, California. Whittier Narrows Dam is a central element in the Los Angeles County Drainage Area flood control system. The Dam and Reservoir serve to collect runoff from uncontrolled drainage areas upstream as well as releases into the San Gabriel River.

Whittier Narrows Dam has been reclassified: Dam Safety Action Classification 1

This rating indicates the United States Army Corps of Engineers considers the incremental risk – the combination of life or economic consequences with the likelihood of failure – to be very high

Such a classification identifies the dam as a high priority dam safety project.

Several endangered species occur at the Whittier Narrows site and they are the California Gnatcatcher and Least Bell’s Vireo.