William Jolly Bridge showing the official final cost as £688,387/12/5. The Grey Street Bridge opened on 30 March 1932The bridge was officially opened to traffic on 30 March 1932 by Sir John Goodwin, the Governor of Queensland, just eleven days after the opening of the Sydney Harbour Bridge. A large crowd gathered on both sides of the river and 600 invited guests were in attendance. There was great community interest in the massive public works under construction at the time. It was the era of the Great Depression and massive public works, and Vida Lahey, a distinguished Queensland artist, painted the bridge at
Sydney Harbour Tunnel to Sydney Harbour. A trench was dredged before the arrival of the IMTs and then the IMTs were lowered into the trench by a system of pontoons and control towers. After the IMTs were in place the trenches were backfilled and then a rock armour was placed over the top to protect the units against marine hazards, such as anchors or sinking vessels. The land tunnels were constructed by a combination of driving and cut-and-cover techniques, designed to be strong enough to withstand the impact of earthquakes. The northern end pylons of the Sydney Harbour Bridge were altered to allow