The Texas Highway 274 bridge at Cedar Creek Reservoir spillway in Henderson County will remain closed for about three weeks, according to the Texas Department of Transportation.
An inspection revealed concrete deterioration, according to the news release.
TxDOT is preparing to issue an emergency maintenance contract.
The bridge is about 7 miles north of Texas Highway 31 between Trinidad and Seven Points. It was closed Wednesday.
Alternate routes include Texas highways 334, 198 and 31.
Traffic updates are available at DriveTexas.org or by calling 800-452-9292.