The Brownsville B&M Port of Entry opened in 1909 with the completion of the Brownsville & Matamoros International Bridge.

The bridge was built to carry trains, horses, wagons and pedestrians.

The original bridge could swing open to allow river traffic to pass; however it was a function that was almost never used due to the shallowness of the Rio Grande.

[1] The bridge was substantially renovated in 1953, and a second 4-lane bridge dedicated to northbound traffic was built adjacent to it in 1997.

Since 1999, all truck traffic has been diverted to the Veterans and Los Indios crossings.