Saxe-Gotha failed primarily due to frequent flooding, and Granby was then plotted on slightly higher ground just south in the 1750s.

The town had many successful small farms, producing corn, wheat, tobacco, hemp, flax, beeswax, and livestock.

[7] The fort was ineffectively attacked by a small rebel force led by Brigadier General Thomas Sumter on February 19, 1781.

[8] On the 21st, a superior army under the command of Lord Francis Rawdon arrived from Camden on the eastern side of the river, and Sumter abandoned the siege.

Upon being attacked by infantry musket fire supported by one six-pound cannon, Maxwell agreed to surrender the fort and its 352 defenders if he was allowed to keep two wagon loads of "personal loot".

[3] Wade Hampton replaced the ferry with an unusual river bridge built of wood and iron with an arch exceeding 100 feet (30 m), and had legislative authority to collect tolls for 100 years.

[13] As land upriver was cleared for cotton farming, Granby became prone to flooding, and the county seat was relocated in 1818 to Lexington.

[1] Meanwhile, Columbia, on the opposite side of the river, was made South Carolina's capital in 1786,[4] spurring its growth and the further decline of Granby.

)[13] Granby remained mostly uninhabited until the Civil War, when an earthen fortification erected there by the Confederates was attacked in the 1864 Battle of Congaree Creek.

[15] A granite commemorative marker was installed at the Granby cemetery in 1929 by "The South Carolina society, Colonial Dames of America".

[13] Since the cemetery is inaccessible to the public as it is surrounded by private property, the marker was moved in 2012 to the Cayce Riverwalk, a walking and jogging trail along the river.

[19] An archaeological site including the 1718 and 1748 trading posts was designated the Congarees and listed on the National Register of Historic Places in 1974.