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Engineering Heritage Victoria Newsletter - June 2010

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Engineering Heritage Victoria Newsletter - June 2010 Engineering Heritage Victoria Newsletter - June 2010 This is an occasional newsletter from Engineering Heritage Victoria sent to all members on our mailing list. Enquiries, discussion or correspondence related to the Newsletter should be directed to the Editor at [email protected] or address postal correspondence to the Chairman, Engineering Heritage Victoria, Engineers House, 21 Bedford Street, North Melbourne, Vic 3051. 1. Guest Speakers 2010 The Next Date: Thursday 17th June 2010 Time: 5.30 for 6.00 p.m Event Title: The History of High Voltage Direct Current Transmission Speaker/Presenter: Owen Peake Venue: Engineers Australia John Connell Auditorium, 21 Bedford Street, North Melbourne Hosts: Engineering Heritage Victoria About the Subject: Transmission of electricity by High Voltage Direct Current (HVDC) has provided the electric power industry with a powerful tool to move huge quantities of electricity over long distances and also to greatly expand the capacity to transmit electricity by undersea cables. The first such scheme connected the island of Gotland off the Swedish mainland in 1954. This scheme initially transmitted 20 MW at 100 kilovolts (kV) over a distance of 298 km of overhead line and undersea cable. The project used mercury arc valve technology. During the next 54 years great advances have been made. Schemes currently in construction in China and India will each transmit in excess of 6000 MW over 2000 km at 800 kV. The longest undersea cable in service is 580 km whilst a 700 km undersea cable is being constructed. The development of HVDC technology followed the development in the world of small scale electronics – from thermionic valves to solid state thyristors and transistors. Control of solid-state electronics by fibre optics was adopted early in HVDC technology. Operating voltages reached 500 kV by the 1970’s, 600 kV by the mid 1980’s and schemes are now being constructed at 800 kV. Because of the rapid development of HVDC technology many of the early schemes have already been decommissioned, making the story of this specialist area more urgent from an engineering heritage perspective. There is a serious risk that most of the remaining equipment from the mercury arc valve era will be lost. The presentation will include a comprehensive but straightforward module on “How HVDC Works” About the Speaker: Owen Peake is an electrical engineer who has spent his working life in the utility industries. He is now retired and engaged full time in engineering heritage work. His positions include Chair of the National Board of Engineering Heritage Australia, member of the committee of Engineering Heritage Victoria and Australasian Editor for the International Stationary Steam Engine Society. Future Presentations: On the 19th August David Crotty will talk about John Robertson Duigan and the aeroplane built by Duigan and his brother on their parents’ farm in 1910. Their biplane was the first Australian-made aeroplane to fly. It’s first flight was made on 16th July 1910. (see more in Section 2. below) On 21st October, David Beauchamp, Richard Lipianin and Steve Di Cicco will discuss the Church Street Bridge – the bridge that links Church Street in Richmond with Chapel Street in South Yarra across the Yarra River. This presentation will be conducted jointly with Structural Branch. 2. Engineering Heritage Victoria — Committee Meeting 13th May 2010 New member of the Committee: Bruce McCann was welcomed to his first meeting of the EHV committee. McCann has a special interest in the nomination of the Goldfields Railways for National Engineering Heritage Landmarks (see more below). Engineering Heritage Victoria Newsletter — June 2010 Page 2 The Duigan Centenary of Powered Flight in Australia: Correspondence received from The Duigan Centenary of Flight - 2010, informed us of the celebrations to be held at Mia Mia (the Duigan fam ily property) and Bendigo on the 16th to 18th of July 2010. The organisers call for support for the project, either financial, or by helping on one of their working groups, by in-kind donations, by volunteering to assist with the events at Mia Mia, by participating in the flying activities or just by participating in any of the events or activities. The correspondence was received in the form of a pdf file which could be made available to members by request to the Editor. However the following websites probably have the same information: http://www.australiancentenaryofpoweredflight.com.au/ & http://www.duigancentenaryofflight.org.au/ Threatened Sites of Engineering Heritage Significance: The Murtoa Stick Shed: Engineering Heritage Australia and Engineering Heritage Victoria are supporting the conservation and repair of the Murtoa Stick Shed. The Stick Shed is under threat of demolition, or partial demolition, partly because of perceived safety concerns and partly to create more room for grain storage on the site. The Stick Shed is included on the Victorian State Heritage Register (Item H0791). For some images, a brief description and a statement of significance, go to: http://vhd.heritage.vic.gov.au/vhd/heritagevic#detail_places;868 Also – Owen Peake’s article about the Stick Shed, for the June Engineers Victoria newsletter, is included below. The Morwell Number 21 Dredger: PowerWorks wants to demolish this iconic early bucket-wheel dredger because of its deterioration and safety concerns. EHV, The Engineers Australia Gippsland Regional Group, the Council of the City of Latrobe and Heritage Victoria all support restoration and ongoing retention of the Dredger at its Morwell site. If you want to know more, the National Trust Victorian News of August 2009, page 8, has a useful article about the dredger by David Moloney, the Trust’s Industrial Historian. Go to: www.nattrust.com.au/content/download/.../Vic%20News%20Aug%2009.pdf Kirwan’s Bridge over the Goulburn River on the Longwood - Kirwan’s Bridge Road: This basically timber bridge near Nagambie is a remarkable survivor. 120 years old and 310 metres long, it is still in use for motor traffic (one-way, with two passing bays). A description can be found on the Victorian Heritage Database – go to: http://vhd.heritage.vic.gov.au/vhd/heritagevic#detail_places;6067. The bridge is included in the Victoria Heritage Register as item H1886 and in the Strathbogie Heritage Overlay under number HO26. The bridge is under threat because of continuing deterioration mainly caused by abuse of its weight and speed limits, and despite restoration work undertaken in 2004 with funding from the Commonwealth, the State, Heritage Victoria and the Shire of Strathbogie. The Shire urgently needs funds for further upgrading work and a local group has been set up to lobby for this. For more information or to join the campaign, go to: http://www.nagambielakestourism.com.au/, or ask Alan McLean ([email protected]) to send you a copy of Kirwans Bridge Brochure.pdf or Bridge rally 2 June.doc or some excellent photographs (see part of one below). The setting of the bridge can be seen in a Google Map: http://maps.google.com.au/maps?ie=UTF8&ll=-36.745109,145.143986&spn=0.016094,0.043173&t=k&z=15> Engineering Heritage Recognition Program Goldfields Railways: The EHV meeting on 13 May appointed a sub-committee of 6 to undertake the research and writing of nominations for the two railways. The members are Matthew Churchward, Margret and Carl Doring, Bruce McCann, Ken McInnes and Owen Peake. Owen Peake will probably act as secretary for the sub-committee and can be contacted by email at [email protected] or by Engineering Heritage Victoria Newsletter — June 2010 Page 3 phone at (03) 9419 0820. If you have ideas, contributions, documents or images on these subjects please contact a member of the sub-committee. The following issues will be explored as a first step: What should be the boundaries of each railway? (for instance in the case of the Bendigo Railway should the nomination terminate at Bendigo, Echuca or Deniliquin/Balranald?) What sites should be marked? What particular features, individuals or technical breakthroughs should be given emphasis in the nominations? Any information or views on the above will be of assistance to the sub-committee. A few notes on the history & significance of the Goldfields Railways are included below in Section 4.. Engineering Heritage Sites and Objects Needing Recognition & Nomination: A priority list of places and items needing nomination for the award of a NEL (National Engineering Landmark) or HEM (Engineering Heritage Marker) has been put together by members of the Committee and others. This list is extensive, com prising 62 items, and we urgently need members who will volunteer to take on the nomination of one or more of these items. If you are interested taking on one of these projects, or if you have some significant knowledge of and/or documentation about any of the items, but don’t want to take on the sole responsibility of nominating them, please get in touch with Owen Peake ([email protected] or ph.(03) 9419 0820) or the Editor (at [email protected]). The priority list for sites in Victoria is included at Item 7 below. Information about preparing a nomination can be found in the Guide to the Engineering Heritage Recognition Program (a pdf file) on the Engineers Australia Website at http://www.engineersaustralia.org.au/ . There is also a pdf Register of Engineering Heritage Markers on the site. The Editor was shocked to see that, of the 137 items included in the list (NELs and HEMs), only 10 are in Victoria. W e must do something to rem edy this failure! And it is only our Victorian membership that can do it! Self-Guided Engineering Heritage Tours – the Need for Booklets and/or Brochures: This has been discussed at several recent EHV Committee meetings.
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