The Morgan County portion of Decatur is surrounded by water on two sides. The Tennessee River is a northern border, while Flint Creek serves as a border between Decatur and Priceville, AlabamaPriceville. There is also an inlet that extends one mile into the city limits from Wheeler Lake called Dry Branch. The northern portion of Decatur sits on top of a short hill that overlooks the Tennessee River, this creates a very steep dropoff to the river shore a Rhodes Ferry Park. This hill allows the Captain William J. Hudson "Steamboat Bill" Memorial Bridge"Steamboat Bill" Memorial Bridge to leave the mainland at grade without any major sloping required more height to cross the river while not interfering with Decatur's heavy barge traffic. This hill extends from the banks of the river about 1.5 miles south to the 14th St./Magnolia St. intersection with 6th Avenue (US 31). South past the 14th St. and 6th Ave. intersection, land continues to remain flat. South, and also west, past State Route 67 (Alabama)Alabama 67 there are a few minor mountains that sit within the city limits. Decatur is located at (34.580992, -86.983392). According to the U.S. Census Bureau, the city has a total area of 155.1 km sq (59.9 square miles). 138.3 km sq (53.4 mi sq) of it is land and 16.8 km sq (6.5 mi sq) of it (10.83%) is water. Source: http://en.wikipedia.org/wiki/Decatur%2C_Alabama