Augusta is located on the Georgia/South Carolina border, about 150 miles (240 km) east of Atlanta and 70 miles (110 km) west of Columbia. The city is located at 33°28?12?N 81°58?30?W (33.470, ?81.975). According to the United States Census Bureau, the Augusta-Richmond County balance has a total area of 306.5 square miles (793.8 km2). 302.1 square miles (782.4 km2) of it is land and 4.3 square miles (11.1 km2) of it (1.42%) is water. Savannah River and the Augusta Canal, with River Watch Parkway and residential areas in foreground Augusta is located about halfway up the Savannah River on the fall line, which creates a number of small falls on the river. The city marks the end of a navigable waterway for the river and the entry to the Georgia Piedmont area. The Clarks Hill Dam is built on the fall line near Augusta, forming Clarks Hill Lake. Further downstream, near the border of Columbia County, is the Stevens Creek Dam, which generates hydroelectric power. Further downstream is the Augusta Diversion Dam, which marks the beginning of the Augusta Canal and channels Savannah River waters into the canal. Climate According to Koppen classification, Augusta has a humid subtropical climate. The city experiences short winters and an extremely humid summer. The average high temperature for the summer months is 90.6 °F (32.6 °C). Summer daytime temperatur
s can soar to 100 or above. The average low temperature is 67.8 °F (19.9 °C). The average high temperature for the winter months is 58.9 °F (14.9 °C); the average low temperature is 34.4 °F (1.3 °C). Snowfall is not nearly as common as in Atlanta, due largely to Augusta's elevation, with downtown Augusta being about 900 feet lower than downtown Atlanta. Still, snow flurries are typically seen annually. Freezing rain is also a threat in wintertime. J. Strom Thurmond Dam, also known in Georgia as Clarks Hill Dam, is a concrete-gravity and embankment dam located 22 miles (35 km) north of Augusta, Georgia on the Savannah River at the border of South Carolina and Georgia, creating Lake Strom Thurmond. The dam was built by the U.S. Army Corps of Engineers between 1946 and 1954 for the purposes of flood control, hydroelectricity and downstream navigation. The concrete structure of the dam spans 1,096 feet (334 m) and rises 204 feet (62 m) above the riverbed, housing a power plant with an installed 380 MW capacity. The Dam has prevented over $185,000 in estimated flood damage annually and also provides recreation, water quality, water supply, along with fish and wildlife management. Since 1988, the official name of the dam is after Strom Thurmond, a longtime Senator. Originally and accepted in Georgia, the dam is named after a local town, Clarks Hill in South Carolina.