Cobb Bridge was destroyed by the Communists in the final push that toppled the South Vietnamese government. It was later rebuilt further up the river.
We had a small boat that we used to run back and forth to Tugboat on up the river in the direction we are looking. As I remember it we boarded the boat just below the high grass. One day I was riding the boat back from Tugboat to Cobb Bridge for some reason. I didn't need my rifle so I borrowed a .45. About two miles before the bridge somebody along the bank fired off a whole clip. They obviously weren't firing at us, and just as obviously it was an M-16, probably some PF or ARVN who said to his buddies, "Here hold my beer and watch this shit." I have no memory of even moving but I was on the bottom of the boat with the .45 pulled and cocked. Wyatt Earp would have been proud.
This picture was probably taken from, or close to, the position first platoon's rocket section would have manned when we were in. I must have spent a butt-load and a half of hours sitting looking across that field. I always sort of thought this was a good position to have, figuring that any attack on the bridge would be on the other side of the river. Couldn't imagine anyone trying to move across this field.