A potentially major new fight has erupted over Gov. Jerry Brown’s plan to build two huge tunnels beneath the Sacramento-San Joaquin Delta, and this time the protests are coming from a group of farmers that wants the tunnels built.

The San Luis & Delta-Mendota Water Authority, a powerful San Joaquin Valley farm water agency, demanded Monday that two members of the State Water Resources Control Board be disqualified from a crucial hearing on the tunnels scheduled for early May.