I am not sure which bridge this is. LA 191 Crosses more than one cove of Toledo Bend. I think it is the one just north of LA 6 on LA 191. Either way it DOES NOT cross the Sabine River. It should not have the name "Sabine river bridge", unless this is a duplicate of the LA6 /TX 21 Bridge. (Which I do not think it is.)
This is more accurately called the Toledo Bend Spillway Bridge. NBI data says it carries La 191 over the Toledo Bend Reservoir and was built 1963. Since the Toledo Bend Reservoir is an impoundment of the Sabine River, the Sabine River Bridge name is also technically correct, but not as specific as it could be.