 The Queanbeyan River joins the Molonglo River at Oaks Estate just within the ACT.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.