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File #: 25-1067    Version: 1 Name:
Type: Information Item Status: Agenda Ready
File created: 12/2/2025 In control: Agricultural Water Advisory Committee
On agenda: 1/5/2026 Final action:
Title: Receive an Update on the Upper Llagas Flood Protection Project.
Attachments: 1. Attachment 1: PowerPoint
COMMITTEE AGENDA MEMORANDUM
Agricultural Water Advisory Committee

Government Code ? 84308 Applies: Yes ? No ?
(If "YES" Complete Attachment A - Gov. Code ? 84308)



SUBJECT: title
Receive an Update on the Upper Llagas Flood Protection Project.
End

RECOMMENDATION: Recommendation
Receive project information on the Upper Llagas Flood Protection Project and the current construction status.
Body

SUMMARY:
Valley Water is currently constructing the last phase of the Upper Llagas Creek Flood Protection Project (Project). This project which started way back in 1968 as a partnership with the State of California, and then later in 1999, as a partnership with the U.S. Army Corps of Engineers (USACE) and the City of Morgan Hill (City) to provide 1% flood protection to more than 1,100 residences and 500 businesses along West Little Llagas Creek, East Little Llagas Creek, and Llagas Creek. The Project, part of the renewed Safe, Clean Water and Natural Flood Protection Program, is approximately 13.9 miles long and is located within the cities of Morgan Hill and Gilroy, and various unincorporated areas of Santa Clara County, including San Martin.
Llagas Creek and its tributaries are part of the Uvas/Llagas Watershed, the area of land over which rain falls and then drains southward to the Pacific Ocean through Monterey County or into reservoirs for storage. The Uvas-Llagas Watershed is a 104-square-mile region that is distinguished by its agricultural lands, open space, and natural areas. Part of the larger Pajaro River Watershed, the creeks within this watershed are the only waterways in Santa Clara County that flow southward.
The Project consists of channel widening and deepening, instream improvements for wildlife and habitat, constructing box culverts, underground high flow bypass tunnel, and revegetation. The Project's mitigation elements to offset environmental impacts associated with the construction work include the following environmental elements:
* Ripar...

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