Windamere Dam is a minor ungated rock fill with clay core embankment dam with an uncontrolled unlined rock cutting spillway across the Cudgegong River at Cudgegong, upstream of Mudgee in the Central Tablelands of New South Wales, Australia.

The uncontrolled unlined rock cut spillway is capable of discharging 6,270 cubic metres per second (221,000 cu ft/s).

[1][2][3] Geotechnical problems included excessive grout takes in highly fractured rock in the dam foundation.

If a spillway had been built in the weathered sedimentary rocks at the dam site full concrete lining would have been required.

[5] A hydro-electric power station generates up to 2 megawatts (2,700 hp) of electricity from the flow of the water leaving Windamere Dam.