A key to the geography represented by Craig Wedderspoon's metal sculpture of the Black Warrior River which is imbedded into the walkway leading up to the Minerva statue @ the University of Alabama's Manderson Landing Park on Tuscaloosa's Jack Warner Parkway.

The circle represents a point just northeast of Demopolis where the Black Warrior empties into the Tombigbee. The first upward loop of the sculpture that surrounds the "1819 note" is Webbs Bend of the Warrior north of Demopolis. Webbs Bend - Google Maps

The U.S. Highway 43 bridge and the King Railroad Bridge are in the loop above the word "December".

The bend above "13" is called Gadeous Bend and the lower bend to the right of "Incorporated" is called Klies Bend. 

The portion of the sculpture coming up from Klies Bend represents the part of the Warrior River that bounded the western portion of the property that the U.S. Congress granted to the Vine & Olive Company in 1817.

Viewing States/Alabama/Counties/marengo/Marengo1828a.sid

Vine and Olive Colony - Encyclopedia of Alabama

Arcola is located a few feet directly above "1819" and above the seam in the concrete.

Arcola is near "1831". Alfred Hatch Place at Arcola - Wikipedia

The Greene County Steam Plant is located just above "Treaty".

This huge loop around the "1834 note" is the Clements Bend area of Hale County. The Bird property would be over to the left beyond the sculpture.

The Millwood Plantation near Greensboro would be at the top of this loop. Millwood (Greensboro, Alabama) - Wikipedia

This ends the portion of the sculpture covered by Page 42 of the Alabama Delorme Atlas and Gazateer.

DeLorme Atlas & Gazetteer: Alabama

Erie Bend is above "Bryce".  This is the location of the ghost town of Erie. 

Erie, Alabama - Wikipedia

The "1871 note" occupies the Dollarhide Hunting Camp area. GREAT_DAY_OUTDOORS_ARTICLE_FEB_2020.pdf