Due to the steepness of the ruling gradient of 1 in 19 (reported to be the steepest grade used by adhesion locomotives in Australia) between Campbelltown and Kenny Hill, there were often multiple attempts made at ascending the grade. Passengers would sometimes have to disembark from the train and walk alongside it, leaving their bags on board. When trains could not successfully ascend the hill, the train would be divided and the second half of train (invariably the part where the passengers were carried) would be left standing on the line until the first half of the train had been stowed at Campbelltown. Such delays on the line were a source of annoyance and inconvenience for passengers. The main source of income for the line was the coal loader at Narellan and the Dairy Farmers Milk Co-operative depot at Camden. The line closed on 1 January 1963.
