Modifications to a Cemex mining permit near Livermore’s southwest side in the vicinity of Isabel Avenue will be the subject of a modified environmental impact report (EIR) prepared by Alameda County.

The County is the lead agency for the EIR modification. However, Zone 7 Water Agency will be watching the process closely, according to a Zone 7 news release,

Zone 7 states that the permit has been modified so that mining will go deeper than originally planned in Lake B, one of the lakes that will eventually be turned over to Zone 7 as part of a Chain of Lakes water storage system. This system will help the agency contain flood run-off, store water, and assist ground-water recharge.

“The Zone 7 Water Agency understands that mining activities will be continuing for many years, and will continue to monitor current activities and review proposed changes as they relate to water management for the Tri-Valley area,” notes the Zone 7 release.

The general public and public agencies have until July 18 to comment on the EIR.

Documents are available on the Zone 7 homepage under County of Alameda Eliot Quarry Surface Mining Permit Noticing. The Zone 7 home page is at

In 2015, Cemex had a plan to reopen mining in Lake A, across Isabel Avenue to the East. However, concerned neighbors protested; then, Cemex dropped the idea. Instead, the firm agreed to a reclamation plan for Lake A, which included restoring the original appearance as much as possible and creating a bike and pedestrian path on the lake’s south side.