More than 100,000 gallons of water poured into a ditch on Highway 377 for about 30 minutes Wednesday afternoon when a water transmission line supplying the city of Dublin burst about 3 p.m. 

Gary Lacy, a representative of the Upper Leon River Municipal Water District, estimated the break will cost the district about $5,000.

A boiling water alert was issued for Erath County residents south of Dublin Wednesday night after service was restored and samples were sent to be tested for contamination. Lacy expects to lift the warning early Friday morning.

Representatives did not immediately shut off the water flooding into the ditch.

"After we assessed the situation we determined it was best for us to leave the water running despite the break. We had to allow the water to continue traveling down the transmission lines to fill the ground storage tanks that supplies the city of Dublin," Lacy said.

Shutting off the water flow too early can cause contamination and/or malfunctions in other areas of the water transmission system.

Dublin water service remained uninterrupted because of the ground storage tanks, causing city officials to implement the emergency stage of its drought contingency plan.

Visit for exclusive video footage of the water main break.