The city of Danville, California, has filed suit against Contra Costa County for its approval of 125 new homes in a section of protected open space in the Tassajara Valley. Danville lies directly west of the proposed 30-acre development and alleges that the county unfairly prevented the city from participating in project negotiations.

The agreement between the county, the city of San Ramon and the East Bay Regional Park District couldn’t have been reached had Danville participated because existing law allows the line to be expanded only when a majority of cities affected by the boundary shift agree to it.

“We were left out of the agreement because if they included us, then the board wouldn’t be able to make the finding they needed to make,” Danville City Manager Joe Calabrigo said last month after the Board of Supervisors voted 4-1 to expand the line.

Danville’s lawsuit is the latest of three filed in the past week against Contra Costa County related to this development. Other suits include a collective filing by the Sierra Club, Greenbelt Alliance, and two individuals, and a separate suit from the East Bay Municipal Utility District, which alleges it doesn’t have enough water to deliver to the new homes.

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