Ogeechee River

Ogeechee River is a 294-mile blackwater river in Georgia, United States. It begins about 2.5 miles south-southwest of Crawfordville, at the confluence of its North and South Forks, and flows southeast to Ossabaw Sound, about 16 miles south of Savannah. The Canoochee River, which drains around 1,400 square miles and is the basin's only other major river, is its main tributary. It has a 5,540-square-mile watershed. It's one of the few free-flowing streams in the state.

In the Canoochee River, parts of the Piedmont and Coastal Plain physiographic provinces, which span across the southern United States, are found in the Ogeechee River basin. This line follows the contact between the Piedmont Province's older crystalline metamorphic rocks and the Coastal Plain Province's newer unconsolidated Cretaceous and Tertiary sediments. Metasedimentary rock, schists and phyllites, felsic and mafic metavolcanic rocks, and amphibolite are among the other rock types found in the basin. At the Fall Line, Coastal Plain sediments meet the igneous and metamorphic rocks of the Piedmont Province's southern boundary.

Length: 294 miles