Duane's take
Here's my telling of what the official marker says about the Jefferson Turn Basin, right there in Marion County. Now, picture a wide, deep lagoon carved into Cypress Bayou. Not a natural wonder exactly, but something better — a working wonder.
This was the Jefferson Turn Basin, and its whole purpose was to give the ships of the Gulf-to-Red River trade room enough to turn themselves around. You try spinning a steamboat in a tight space sometime. You'll appreciate the lagoon.
The first steamer to make it all the way here was the Lama, and she did it in 1844. To get there, she'd come up by way of the Red River — but here's the thing about that Red River. For two hundred miles above Shreveport, it was absolutely choked.
Not by ice, not by low water, but by a raft. A massive tangle of debris that had been piling up and building on itself since around 1529. Think about that.
That raft had been growin longer than the United States had existed by the time the Lama pushed through to Jefferson. Because of that raft gumming up the Red River, Cypress Bayou became the route. The best route — really the only sensible route — into Oklahoma, western Arkansas, and north Texas.
All that commerce, all those goods, all those ambitions funneling right through this lagoon in Marion County. And Jefferson rose to meet the moment. Until the Federal government stepped in and removed the raft in 1873, Jefferson was the greatest inland port in the entire Southwest.
And this basin — this wide, deep turning place in Cypress Bayou — was its beating business heart. Then 1873 came. The raft went.
The river opened up. The trade found new paths, the way water always does when you clear the obstacles. Jefferson's moment began to pass.
The last steamer worked these waters in 1903. After that, the basin kept its shape and the bayou kept its quiet, holding the memory of all those hulls that once had to spin themselves around right here before heading back out into the world.
What the marker says
Wide, deep lagoon in Cypress Bayou, used for turning around ships in Gulf-Red River trade. First steamer to reach here was the "Lama" in 1844, by way of Red River, which for 200 miles above Shreveport was clogged by a "raft" of debris that had begun forming about 1529. Cypress Bayou thus was best travel route into Oklahoma, western Arkansas and north Texas. Until Federal government in 1873 removed the raft, Jefferson was southwest's greatest inland port, with this basin its business center. Last steamer operated here in 1903.