Technical Paper 2 – Heritage Assessment - Transport for NSW ...

5.2 Impact on the Heritage Items in the Monorail PathItemPyrmont Bridge(Map Reference 1)Heritage Listings • State Heritage Register• SHFA S170 RegisterStatement ofSignifi cancePyrmont Bridge is an item of State heritage signifi cance for its aesthetic, historical and scientifi ccultural values. An essential link between the city and the inner western suburbs, Pyrmont Bridge isclosely associated with the economic and social development of Sydney at the end of the 19th century.Pyrmont Bridge is closely associated with Percy Allen, PWD Engineer-in-Chief of bridge design, whowas responsible for the introduction of American timber bridge practice to NSW and designed over 500bridges in NSW. The quality of the carved stonework of the piers and portals added to the aestheticappeal of the bridge. At the time of construction the swing span of Pyrmont Bridge was one of the largestin the world. It was one of the fi rst swing bridges to be powered by electricity. The timber approachspans demonstrate a rare example of deck type Allan trusses; there being no other known example. Thebridge’s Australian design and technological innovation was a source of pride for the people of NSW.Despite the demolition of the eastern approach to the bridge and the construction of the mono-rail track,Pyrmont Bridge retains its essential heritage values.Proposed works • Removal of all structural steel elements that are part of the Monorail facility;• Make good of Bridge deck and waterproof membrane;• Removal of hydraulic machinery platform;• Re-support of the centre pivot walkways following removal of structural steel;• Removal of block seats on the Bridge Deck which contain the beam lifting rams and make good;• Removal of all electrical elements pertaining to the Monorail;• Relocation of “Stop Don’t Walk” signs from pier columns;• Relocation of fluoro lighting on machine deck;• Decommissioning and potential removal of submarine cabling supply power to the Monorail (orelements of the Monorail);• Removal of Control Circuits for the Monorail;• Conduct operational and test plans of control circuits following removal of equipment;• Removal of all hydraulic components pertaining to supply of power to the powerpaks;• Drainage of all hydraulic fluids and disposal at an appropriate facility;• Relocation of pedestrian and cycle signage currently located on Monorail columns; and• Make good on steel to be suitably corrosion protected if any existing elements are affected byMonorail removal process, e.g. fi xtures and fi ttings.Continued on next page25Monorail Removal ProjectStatement of Heritage ImpactNovember 2012Graham Brooks & Associates Pty Ltd