City Hall will be closed from December 23, 2019 through January 1, 2020

Tres Hermanos Conservation Authority

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The Tres Hermanos Conservation Authority is a joint powers agency with representatives from Chino Hills, Diamond Bar, and City of Industry. The purpose of this authority is to work jointly with the surrounding cities to protect the 2,445 Tres Hermanos Ranch.

Chair – Cory Moss
Vice Chair – Carol Herrera
Board Member – Catherine Marcucci
Board Member - Ray Marquez
Board Member – Peter Rogers
Board Member – Newell Ruggles
Board Member – Steve Tye



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