C. Y. O'Connor CMG (11 January 1843 – 10 March 1902), full name Charles Yelverton O'Connor, was an Irish engineer who is best-known for his work in Australia, especially the Goldfields Water Supply Scheme.
By 1891 O'Connor had much experience in harbour and dock construction when he resigned his position in April of that year to become Engineer-in-Chief of Western Australia. His wife and children relocated with him to Australia. There he was responsible for the construction of Fremantle Harbour and the Goldfields Water Supply Scheme project that supplied water to the Eastern Goldfields. He was the inaugural Engineer in Chief of the Public Works Department.
Over 100 years of continued use of Fremantle Harbour by heavy shipping has vindicated any doubts about O'Connor's technical judgment.
O'Connor is best known for his work on the Goldfields Water Supply Scheme, also known as the Goldfields Pipeline. This pipeline — perhaps the world's longest water main — carries water 330 miles (530 km) from Perth to Kalgoorlie. A succession of gold rushes in the Yilgarn region near Southern Cross in 1887, at Coolgardie in 1892, and at Kalgoorlie in 1893 caused a population explosion in the barren and dry desert centre of Western Australia, exemplified by towns like Cunderdin and Merredin. On 16 July 1896, John Forrest introduced to Western Australian Parliament a bill to authorise the raising of a loan of £2.5 million to construct the scheme: the pipeline would cart five million gallons (23,000 m³) of water per day to the Goldfields from a dam on the Helena River near Mundaring Weir in Perth, pumped in eight successive stages through 330 miles (530 km) of 30 inch (760 mm) diameter pipe to the Mount Charlotte Reservoir in Kalgoorlie. The water is then reticulated to various mining centres in the Goldfields.
O'Connor was subjected to prolonged criticism by members of the press and also many members of the Western Australian Parliament over the scheme. Forrest, always a supporter, had left Western Australian politics to become federal defence minister; defamatory attacks by the press had wounded him. O'Connor committed suicide less than a year before Forrest officially commissioned the Goldfields Water Supply Scheme.
Evans describes how political machinations and individual greed led to many libellous newspaper articles about O'Connor towards the end of the pipeline project. One article in particular in The Sunday Times, 9 February 1902, is thought to have contributed to his death. Accusing O'Connor of corruption, it read, in part:
...And apart from any distinct charge of corruption this man has exhibited such gross blundering or something worse, in his management of great public works it is no exaggeration to say that he has robbed the taxpayer of this state of many millions of money...This crocodile imposter has been backed up in all his reckless extravagant juggling with public funds, in all his nefarious machinations behind the scenes by the kindred-souled editor of the The West Australian. —(Evans 2001:219)
The government conducted an inquiry into the scheme and found no basis for the press accusations of corruption or misdemeanours on the part of O'Connor.
The lake created by Mundaring Weir is now known as Lake O'Connor, and provides drinking water for the towns along the pipeline to Kalgoorlie, Western Australia.
O'Connor took his own life on 10 March 1902 by shooting himself, while riding his horse into the water at a beach south of Fremantle.
A bronze statue of O'Connor by Pietro Porcelli stands in front of the Fremantle Port Authority buildings, commemorating O'Connor's achievements.
The beach where O'Connor died was named after him and there is also a statue sculpted by Tony Jones, of him in the water there.
The novel The Drowner by Robert Drewe provides a fictionalised account of O'Connor and the building of the pipeline.
On 7 December 1898, his daughter Eva married George Julius at St John's Church, Fremantle. Julius was the first chairman of the Council for Scientific and Industrial Research (CSIR) which later became the CSIRO.
The C. Y. O'Connor College of TAFE in Western Australia bears his name.
O'Connor's great-great-great grandson American-Australian Norbert Basil MacLean III pioneered equal access to the United States Supreme Court for members of the U.S. Armed Forces.