Covering the southern half of Glenrock Nature Conservation Area is the suburb of Whitebridge. Kahibah separates Whitebridge from Charlestown on the western side, while Dudley cuts the suburb off from the ocean on its eastern border. Whitebridge forms part of the Lake Macquarie area.
The area was established in the late 1880s and, like its neighbours, many came to the area because of Burwood Colliery near Glenrock Lagoon. The first shaft at Whitebridge was sunk in 1888. There were five shafts at Whitebridge overall and the workings extended for a kilometre under the sea and as far as Gateshead, Charlestown and Merewether.
The township did not develop around the mine but at the junction of the road and railway; Whitebridge is said to have received its name when the bridge over the Belmont railway line was painted white. The mine closed in 1982 after nearly a century of operation, having become one of the greatest coal producers in Australia.