The Museum is full of interesting exhibits, engines and pumps, tractors and machinery from a past era. With the focus on Irrigation History in general and the unique Humphrey Pump in particular, it also concentrates on the early development of the Irrigation Areas of the Riverland and the machinery used in that developmental stage. The Humphrey Pump, known as Big Thumper was invented by Mr H A Humphrey and is an internal combustion pump.The two pumps at Cobdogla, placed adjacent to each other on a common foundation, provided irrigation water for the Cobdogla Irrigation Area for 40 years until 1965. Only one pump was used at a time, the other pump acting as a standby.