A number of creeks, including Jerrabomberra and Yarralumla Creeks, flow into the Molonglo and Murrumbidgee. Two of these creeks, the Ginninderra and Tuggeranong, have similarly been dammed to form Lakes Ginninderra and Tuggeranong. Until recently the Molonglo River had a history of sometimes calamitous floods; the area was a flood plain prior to the filling of Lake Burley Griffin.