Chattahoochee River - Wikipedia

Geologic history

The current course of the Chattahoochee River has a geologic history that extends back in time at least 100 million years. A Late Cretaceous system of paleovalleys incised into the Coastal Plain unconformity in the vicinity of Columbus, Georgia is infilled with fluvial sands and gravels of the lower Tuscaloosa Formation. Younger rocks of the overlying Eutaw Formation record an estuarine environment in approximately the same location, suggesting a persistent paleodrainage system in the vicinity of the modern Chattahoochee for at least 10-20 million years during the Late Cretaceous.[7] North of the Fall Line, in the Piedmont of Georgia and Alabama, the course of the Chattahoochee River cuts across prominent, resistant rock layers, including the Hollis Quartzite of the Pine Mountain belt, and must have established its current course prior to uplift of those units. At the mouth of the Chattahoochee-Flint-Apalachicola River system, in the Apalachicola River delta, the geologic history of the delta can be traced at least as far back as the Miocene.

Early history

The vicinity of the Chattahoochee River was inhabited in prehistoric times by indigenous peoples since at least 1000 BC. The Kolomoki Mounds, now protected in the Kolomoki Mounds Historic Park near present-day Blakely in Early County, southwest Georgia, were built between 350 AD and 650 AD and constitute the largest mound complex in the state.[8][9]

American Civil War

The Chattahoochee River was of considerable strategic importance during the Atlanta campaign by Union General William Tecumseh Sherman of the American Civil War.

Between the tributaries of Proctor Creek and Nickajack Creek on the Cobb and Fulton county lines in metropolitan Atlanta, are nine remaining fortifications nicknamed "Shoupades" that were part of a defensive line occupied by the Confederate Army in early July 1864. Designed by Confederate Brigadier General Francis A. Shoup, the line became known as Johnston's River Line after Confederate General Joseph E. Johnston and is listed on the National Register of Historic Places.

A month prior to the Battle of Atlanta, Shoup talked with Johnston on June 18, 1864, about building fortifications. Johnston agreed, and Shoup supervised the building of 36 small elevated earth and wooden triangular fortifications, arranged in a sawtooth pattern to maximize the crossfire of defenders. Sherman tried to avoid the Shoupade defenses by crossing the river to the northeast. The nine remaining Shoupades consist of the earthworks portion of the original earth and wooden structures; they are endangered by land development in the area.[10]

Two of the last battles of the war, West Point and Columbus took place at strategically important crossings of the Chattahoochee.

Recent history

Since the nineteenth century, early improvements and alterations to the river were for the purposes of navigation. The river was important for carrying trade and passengers and was a major transportation route.

In the twentieth century, the United States Congress passed legislation in 1944 and 1945 to improve navigation for commercial traffic on the river, as well as to establish hydroelectric power and recreational facilities on a series of lakes to be created by building dams and establishing reservoirs. Creating the manmade, 46,000-acre Walter F. George Lake also known as Lake Eufaula, in Eufaula, Alabama, required evacuating numerous communities, including the historically majority-Native American settlement of Oketeyeconne, Georgia.[11] The lakes were complete in 1963, covering over numerous historic and prehistoric sites of settlement.[12]

Beginning in the late twentieth century, the nonprofit organization called "Upper Chattahoochee Riverkeeper" has advocated for the preservation of the environment and ecology of the northern part of the river, especially the part traversing Metropolitan Atlanta.

In 2010, a campaign to create a whitewater river course was launched in the portion of the Chattahoochee River that runs through Columbus, Georgia. Between 2010 and 2013, construction took place on the river, the Eagle and Phenix and City Mills Dams were breached and a 2.5 mile Whitewater Course was formed in Uptown Columbus. The project returned the river to its natural path across the Fall Line, as well as creating the longest urban whitewater course in the world.[13]