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Multiple projects coming up for Zone 7 Water Agency

Flood channel repairs, Medeiros Reach updates, Patterson Pass and more

With the rainy season fast-approaching, the Zone 7 Water Agency has a number of projects on its plate.

Weather is an important consideration for the district, which in addition to serving as a water wholesaler for service providers in Pleasanton, Dublin, Livermore and San Ramon's Dougherty Valley, also provides flood control in the Livermore and Amador valleys. And just as the district is preparing for the upcoming winter, they are also in the midst of repairs from previous years' storms, along with other projects on their radar.

Some updates include:

* Flood channel rehabilitation

The agency has been working to repair flood control channels damaged by heavy storms in winter 2017. The 26 construction sites are located in Pleasanton and Dublin on Arroyo Mocho, Chabot Canal, Alamo Canal and South San Ramon Creek.

Construction began in June and is set to continue through mid-October. The initial goal was to finish up much of the work by then.

"However, unanticipated site conditions have been encountered and the potential for additional unanticipated site conditions will exist through the end of the project," officials said in a recent statement. "Unanticipated site conditions could mean that additional safety precautions must be taken, alternative equipment or materials are used, and that work will take more time and be more costly than initially anticipated."

Work is now expected to finish by the end of the 2019 construction season.

* Chain of Lakes well repair

Zone 7 staff are continuing to monitor and address the Chain of Lakes Well No. 1 site, as they have noticed "ongoing, noticeable ground settlement and movement towards Cope Lake which is likely to affect the building, and associated chemical and electrical facilities."

Staff say that these issues will require a "detailed design process and construction of a permanent stabilization remedy for the building."

* Medeiros Project

In light of research, analysis and community concerns, Zone 7 has decided to split the current Medeiros Project into two separate projects.

The Arroyo Mocho Medeiros Parkway Project has been a widely discussed restoration project along Livermore's Arroyo Mocho, set to take place within a 40-acre area along the Medeiros Reach.

Community members, however, expressed concerns, particularly around associated truck traffic and material excavation.

Under the new plan to split the project, though, the first portion will include "lowering the bike path to allow water to spill into the Oak Grove Nature Reserve and reconnect it to the floodplain," expected to be implemented in 2019, staff say.

The second portion will be developed in the future once goals related to flood protection, water quality and water supply have been refined, staff say.

* Patterson Pass Water Treatment Plant

The Zone 7 Board of Directors approved the environmental review documents for the Patterson Pass Water Treatment Plant Ozonation Project, meaning that the project can now move forward.

The Patterson Pass project is similar to the Del Valle one that broke ground earlier this year, and involves the construction of ozone treatment facilities, so that water can be treated for the cyanotoxins formed by blue-green algae using the latest ozonation technologies, among other project components.

The review found that the project wouldn't have a significant adverse impact on the environment after mitigation measures. Construction will begin at some point after Zone 7 staff file a Notice of Determination.

* Flood Preparedness Week

Don't let the rain catch you unawares!

Zone 7 is planning on taking part in the annual California Flood Preparedness Week from Oct. 20-26.

"During California Flood Preparedness Week, local, state and federal agencies across California will work together to inform the public about flood threats, how to prepare, and appropriate actions to take in times of flooding," staff said.

For more information on flood safety, visit the state's website, Zone 7's flood preparedness web page or check out the agency's brochure.

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