Flood Protection

Overview

Zone 7 proactively manages a 37-mile network of streams and flood channels that protect the Tri-Valley community should storms strike..

This is achieved with a combination of carefully engineered stream management practices and community outreach to engage residents in the care of our watershed.

With the ongoing implementation of our Flood Protection Program, we are developing a more integrated approach to channel stormwater more effectively. The long term vision replaces the largely engineered arroyo system with a porous Chain of Lakes allowing us to detain stormwater for other beneficial uses along with other conceptual projects to continuously improve our level of preparedness and resiliency.

Zone 7’s vegetation season starts on May 1st. This means that Zone 7 will begin with mowing and tree trimming at all Zone 7 facilities in Dublin, Livermore, and Pleasanton. Typically mowing will be completed for all three cities in June.

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Flood Management Plan

Flood Management Plan

UPDATE: Zone 7 to Present Flood Protection System Evaluation Results May 21

Zone 7 Water Agency will share the results of a comprehensive evaluation of its flood protection system at the upcoming public Board meeting on Wednesday, May 21, 2025, at 7:00 PM. This evaluation is a key step in developing a comprehensive Flood Management Plan to address current and future flood risks in the Tri-Valley area.

Recent flood events have highlighted the need to address issues like channel erosion and sedimentation in the 37-mile system. Factors such as urbanization, population growth, climate change, aging infrastructure, and evolving regulations are also putting increased pressure on the system.

This evaluation includes an updated Hydrologic and Hydraulic model incorporating the latest climate change data and land use information to project current and future flood risks. The findings will be presented at the May 21 meeting. Following this, Zone 7 will develop potential solutions, with a special Board workshop planned for Fall 2025 to review these alternatives.

The community is encouraged to attend the meeting in person at the Zone 7 Administrative Building (100 North Canyons Pkwy, Livermore), participate via Zoom (link on the agenda at zone7water.com/board-meetings), or watch the live broadcast on Comcast Channel 29, AT&T U-Verse Channel 99 (Livermore), or online at tv29live.org.

Zone 7’s Flood Management Plan (FMP) is being completed through two phases with the goal of optimizing flood management across the entirety of the Zone 7 flood protection system. 

Water Academy Rewards
Flood Ready Freddy holding an open umbrella over his shoulder and a dog leash in his right hand. Medium white and brown dog laying on gravel road

Preparedness

Are you Flood Ready?

Not sure what to put in your emergency kit? Need help making sure your sandbags are placed properly? Wondering why you have to bag your leaves if they are biodegradable? Here you can find the resources to help you answer these questions—and more!

Find out More

Screenshot of Stream Flow Data from Hydrosphere web application

Stream Flow Data on HydroSphere
Flammable hazard placard on tank

Public Safety Power Shut-Off
Zone 7 Flyer Image Preview [Click to view the Flyer]

Flood Preparedness Flyer