[1] It was created by the construction of the Rockwall-Forney Dam, which impounded the East Fork Trinity River.

It measures 22,745 acres (92.05 km2) in size with a storage capacity of 490,000 acre-ft (600 million m3) and a maximum depth of 40 ft (12 m).

Originally designed to provide water to the North Texas region, the project was started in 1964 and managed by the S. and A.

Because of its location in a densely populated area, the lake is crossed by several bridges and causeways.

[2] The 1.8-mile (2.9 km) Texas State Highway 66 bridge was constructed in the 1970s and twinned in the early 2000s, joining Rowlett and Rockwall, and other minor bridges exist on Rowlett Road and Miller Road.