Crankies Plain Bridge, Heritage timber bridge in Bombala, Australia.

Crankies Plain Bridge carries Main Road across the Coolumbooka River at Bombala. Its two 23-metre timber truss spans are flanked at each end by a timber girder span of 11 metres and one of 9 metres, all resting on timber piers with piles driven into rock. The roadway is 5 metres wide between kerbs at its narrowest.

Built in 1892 by the New South Wales Public Works Department to John McDonald's design, the bridge cost A£2,964. It is one of seven McDonald timber truss road bridges recorded in New South Wales in March 1998 and was listed on the State Heritage Register on 20 June 2000.

The bridge is a McDonald timber truss road bridge, a design with three standard span lengths of 20, 23 and 27 metres; this one uses the 23-metre span. By March 1998 only seven McDonald truss road bridges remained in New South Wales, and this is a representative example. Its size and location make it a strong element in the local address.

The bridge carries Main Road traffic and provides access across the river for vehicles and pedestrians. You can approach and walk across the structure, though it remains an active transport link rather than a heritage attraction exclusively.

The McDonald truss was one of the standard timber designs refined in New South Wales, made in three span lengths of 20, 23 and 27 metres; this bridge uses the 23-metre type. By March 1998 only seven McDonald truss road bridges remained in the state, and this one was judged a representative example of State significance.