This report examines in detail the collapse of the Westgate Bridge, located in Melbourne, Australia. What was supposed to be a bridge connecting two sides of the city of Melbourne led to the worst workplace disaster in Australia's history, with a death toll of 35. Included in this report is the planning history of the bridge, the events leading up to the collapse, as well as the collapse itself and how it occurred. The ethical issues presented by the companies working on the construction of the Westgate Bridge are also addressed.I. INTRODUCTION On October 15, 1970, during its third year of construction, the Westgate Bridge collapsed killing 35 men. The section of the bridge that collapsed was a 128 meter span that was being worked on at the time. A royal commission was held to find out what caused this disaster. It turned out to be a critical technical decision that was not handled properly. This was due to poor communication between the contractors of the joint engineering companies. If their indifference and lack of communication had been handled more professionally and ethically, Australia's most devastating workplace disaster may never have occurred.II. HISTORYThe first time a bridge was considered to cross the Yarra River was as early as 1957 to replace the Williamstown ferry service. From then until 1961 there was much discussion, leading up to the establishment of the Lower Yarra Crossing Company. Discussions were held with the Government about a new bridge over the Yarra River, but not much agreement was reached, until in 1965 the Lower Yarra Crossing Company went bankrupt, and so the Lower Yarra Crossing Authority emerged, which in 1967 entered into an agreement with Melbourne-based Maunsell & Partners, as well as London-based Freema… halfway through the document… did not provide design calculations and other data when requested.VI. CONCLUSIONThe disaster that occurred on October 15, 1970 and the tragedy of 35 deaths were completely unnecessary. That this should be allowed to happen was inexcusable. There was no sudden onslaught of natural forces, nor any sudden failure of new or untested material. The reasons for the collapse are to be found in the acts and omissions of those tasked with building a bridge with a new and highly sophisticated design. The West The Gate Bridge stands out as one of the most instantly recognizable landmarks in Melbourne's skyline. For some it is a symbol of the economic progress that links the city to its industrial heartland, but for others it serves as a constant reminder of the tragic and avoidable sequence of events that led to the worst workplace disaster in Australian history.