Proposed gas wells in northwest Dallas will have a harder path after the Dallas Plan Commission on Thursday rejected the request for the second time.
The commission voted 8-7 to reject the drilling proposal.
The vote means that the drilling permits requested by Trinity East need a supermajority of 12 votes to be approved in their final review by the City Council.
That vote has not been scheduled.
Trinity East paid Dallas millions of dollars years ago for a gas lease on city property. The company has threatened to sue if it is not allowed to drill.
Opponents have fought the proposed drilling sites.
Other cities around the region earn big money on gas production.