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The West Gate Bridge is a steel, box girder, cable-stayed bridge in Melbourne, Victoria, Australia, spanning the Yarra River just north of its mouth into Port Phillip. It carries the West Gate Freeway and is a vital link between the Melbourne central business district (CBD) and western suburbs, with the industrial suburbs in the west, and with the city of Geelong Template:Convert to the south-west. It is part of one of the busiest road corridors in Australia. The high span bridge was built to allow large cargo ships to access the docks in the Yarra River.
The main river span is Template:Convert long, and Template:Convert above the water. The total length of the bridge is Template:Convert. It is the fifth-longest in Australia, the longest being Melbourne's Bolte Bridge at Template:Convert. The West Gate Bridge is twice as long as the Sydney Harbour Bridge and is one of the highest road decks in Australia, higher than Sydney Harbour Bridge's Template:Convert. It carries up to 200,000 vehicles per day.
The bridge passes over Westgate Park, a large environmental and recreational reserve created during the bridge's construction.
TransportationEdit
Motor vehiclesEdit
The West Gate Bridge is a 10-lane dual-carriageway freeway bridge, carrying five lanes of motor vehicle traffic in each direction. The freeway corridor (including the bridge itself) carries a very high volume and occupancy of traffic; a total of between 180,000 and 200,000 cars, trucks, and motorcycles use it per day, according to VicRoads. This makes the West Gate Bridge and West Gate Freeway one of the busiest road corridors in Australia.
As it is the only main direct link between Melbourne's CBD and the west, it is frequently congested during the morning and afternoon peaks and is constantly busy due to the number of vehicles coming in and out of the Port of Melbourne. The bridge was originally tolled but John Cain's government made a promise at the 1985 election to discontinue tolls; this came into effect in November of that year.<ref>Paul Robinson 'Bans could close West Gate Bridge, say unions' Melbourne Age 8 March 1985 p. 16; 'West Gate Bridge toll lifted', Melbourne Age 30 November 1985 p. 4</ref>
The bridge is windswept as there are no significant obstructing terrain features for some distance, particularly in the quadrant from south to west, a common wind direction. This can lead to issues for motorbikes, trucks and other high-sided vehicles in higher wind speeds. Previously wind warning lights were present at the bridge approaches to control traffic (amber – bridge closed to motorbikes and high vehicles, red – closed to all traffic), but the former practice is to reduce the speed limit to Template:Convert or Template:Convert when the wind speed gets too high. This has since been replaced with a modern variable speed limit system as part of the 2008–11 upgrade.
CyclingEdit
Cyclists are prohibited from using the bridge except for special bicycle events, notably the Melbourne Summer Cycle, a fundraising event for multiple sclerosis, and the Around the Bay in a Day<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> event that raises money for The Smith Family charity. The Westgate Punt is a foot ferry that runs directly below the bridge, taking cyclists and pedestrians across the Yarra between a jetty at Fishermans Bend near Westgate Park – Bay Trail and a jetty adjacent to Scienceworks Museum – Hobsons Bay Coastal Trail. It operates on demand, from Monday to Friday in morning and evening peaks, and on weekends and public holidays from 10:00 am to 5:00 pm.
HistoryEdit
Proposals and realisationEdit
The notion of a Lower Yarra River Crossing has formal origins as early as 1888, when Victoria’s Public Works Department first proposed a tunnel under the Yarra.<ref>'Hope for Finality on Yarra Crossing' Melbourne Age 15 April 1961 p. 9</ref> The Metropolitan Town Planning Commission's Plan of General Development proposed a bridge for a road between Geelong Road ('west of Kororoit Creek') and Ingles St, Port Melbourne.<ref>Metropolitan Town Planning Commission, Plan of General Development, Government Printer, Melbourne 1929 p. 65</ref> Road routes between central Melbourne and the west were, however, bridged further north, and the usual method of crossing at the lower Yarra was via skiffs until 1912, when ferries were first instituted, the Newport steam ferry operated by the City of Williamstown<ref>'Private Finance Must Build Tunnel' Melbourne Age 6 August 1958 p. 3</ref> taking prominence between 1931 and 1974.
The Western Industries Association was formed in August 1957<ref>J. A. McIntosh 'Gateway to the West', Melbourne Age, 24 February 1970 p. 17 </ref> and claimed to be ‘representative of all industries in Altona, Footscray, Sunshine, Werribee and Williamstown districts’. Having formed a sub-committee to investigate a Yarra crossing, in 1958 it asked Victorian Premier Henry Bolte ‘to give urgent consideration to construction of a traffic tunnel under the Yarra.’ <ref>'Yarra Traffic Tunnel Urged' Melbourne Age 22 July 1958 p. 3</ref> The Association had been told by 'shipping interests' that a bridge would not be acceptable for the crossing.<ref>'Talks on Four-Lane Traffic Tunnel Under River Yarra' Melbourne Age 2 May 1959 p. 3</ref> The tunnel, it was suggested, would carry 30Template:Nbsp000 cars a day; differing estimates on the capacity of the 'overtaxed' ferry suggested it could only handle between 1Template:Nbsp200<ref>‘Private firms may build Yarra crossing: Toll Project to Replace Ferry’ Melbourne Age 3 August 1960 p. 1</ref> and 2Template:Nbsp000.<ref>Talks on Four-Lane Traffic Tunnel Under River Yarra Age 2 May 1959 p. 3</ref> The Victorian Government's response to the proposal, delivered by Commissioner for Public Works Thomas Maltby, was that the government's finances were inadequate to undertake a crossing urgently and that any such project would require private investment.<ref>Talks on Four-Lane Traffic Tunnel Under River Yarra Age 2 May 1959 p. 3</ref> In 1961 Lower Yarra Crossing Limited was formed, a non-profit company to develop the crossing.<ref>Lower Yarra Crossing Authority, Proposed Lower Yarra Bridge Melbourne Melbourne: The Authority, 1966 p. 1</ref> In mid-1960 it was announced that the Association would raise the money to construct the bridge with government support keeping interest rates low; <ref>‘Private firms may build Yarra crossing: Toll Project to Replace Ferry’ Melbourne Age 3 August 1960 p. 1</ref> the arrangement was envisaged as not, in itself, profit-making.<ref>'Sponsors of Lower River Crossing Not Seeking Profit', Melbourne Age 10 August 1960 p. 1</ref> In this year, the Western Industries Association applied to government for license to construct and operate a crossing on a toll basis.<ref>'River Tunnel Plans Ready in March' Melbourne Age 4 December 1961 p. 7</ref>
In 1961 the Association formed Lower Yarra Crossing Ltd.<ref>'Call for Early Move on New Yarra Bridge', Melbourne Age 15 January 1964 p. 10</ref> Test drilling began late in that year by which point the Association once again became publicly open to the construction of a bridge, rather than a tunnel.<ref>'Drilling Tests for Yarra Crossing', Melbourne Age 30 November 1961 p. 6</ref> Nevertheless Danish tunnel engineering firm Christiani and Nielson were engaged as consultants. <ref>'River Tunnel Plans Ready in March' Melbourne Age 4 December 1961 p. 7</ref> Chief amongst the concerns regarding a tunnel was the limitation on particular goods or cargoes - notably, flammable material - that could legally, or safely, be carried through a tunnel.<ref>'Yarra Crossing Bill' Melbourne Age 31 October 1964 p. 3</ref>
In the state government's analysis, the cost of building a bridge or a tunnel would be equal, however, notwithstanding the Harbour Trust's strong advocacy for a tunnel, it was felt by those in power that a bridge would more readily allow use by petrol tankers.<ref>'New bridge expected to take six years' Melbourne Age 20 October 1965 p. 3</ref> In 1965, Yvonne A. Van Den Nouwelant writes, ‘the Lower Yarra Crossing Authority was granted a franchise by Act of Parliament and in 1968 construction started on the West Gate Bridge.’ <ref>Yvonne A. Van Den Nouwelant, Impact of the West Gate Bridge on Industrial Development and Activity in the Western Suburbs of Melbourne BA (Hons) Dept of Geography, University of Melbourne, 1979 p.16</ref> It was noted by the press at the time that the location of the bridge's eastern approaches would require the removal of the Fishermen's Bend airstrip.<ref>'New bridge expected to take six years' Melbourne Age 20 October 1965 p. 3</ref>
CollapseEdit
Two years into construction of the bridge, at 11:50 am on 15 October 1970, the 112-metre (367-foot) span between piers 10 and 11 collapsed and fell 50 metres (164 feet) to the ground and water below. Thirty-five construction workers died and eighteen were injured, and it remains Australia's worst industrial accident.<ref>Template:Cite news</ref> Many of those who died were on lunch break beneath the structure in workers' huts, which were crushed by the falling span. Others were working on and inside the span when it fell. The whole Template:Convert mass plummeted into the Yarra River mud with an explosion of gas, dust and mangled metal that shook buildings hundreds of metres away. Nearby houses were spattered with flying mud. The roar of the impact, the explosion, and the fire that followed, could be clearly heard over Template:Convert away. On the following morning, 16 October, the Premier of Victoria, Sir Henry Bolte, announced that a Royal Commission would be set up immediately to look into the cause of the disaster. Prime Minister John Gorton, said: "I am sure the whole of Australia is shocked and saddened by the serious accident at West Gate Bridge. Please extend my deepest sympathy to all those families to whom this tragic event has brought such grief."<ref>'West Gate', Bill Hitchings, 1979, Outback Press. Template:ISBN</ref>
CauseEdit
The Royal Commission concluded on 14 July 1971. It attributed the failure of the bridge to two causes: the structural design by designers Freeman Fox & Partners, and an unusual method of construction by World Services and Construction, the original contractors for the project.
On the day of the collapse, there was a difference in camber of Template:Convert between two half-girders at the west end of the span which needed to be joined. It was proposed that the higher one be weighted down with 10 concrete blocks, each weighing Template:Convert, which were located on-site. The weight of those blocks caused the span to buckle, which was a sign of structural failure. The longitudinal joining of the half-girders was partially complete when orders came through to remove the buckle. As the bolts were removed, the bridge snapped back and the span collapsed.
Collapse memorialsEdit
Six twisted fragments of the collapsed bridge can be found in the West Gate garden at the engineering faculty of Monash University, Clayton campus. The university acquired them after being asked to participate in the investigation of the collapse. It is said that they are to remind engineers of the consequences of their errors.<ref name=west-gate-garden>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Commemorations have been held on 15 October every year since the collapse.<ref name=wgb-node-123>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> A West Gate Bridge Memorial Park is located near the bridge. It opened on 15 October 2004, the 34th anniversary of the collapse. It includes the West Gate Bridge Memorial and Sculpture, and the memorial for six who died in the Spotswood sewer tunnel collapse of 12 April 1895.<ref name=wgb-node-122>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref name=argus-sewer-25apr1895>Template:Cite news</ref>
CompletionEdit
Three other steel box girder bridges collapsed during their construction between 1969 and 1971:<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> the Fourth Danube Bridge in Vienna on 6 November 1969;<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Cleddau Bridge (Milford Haven), Wales on 2 June 1970;<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> and the South Bridge over the Rhine River in Koblenz on 10 November 1971.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The UK government responded by setting up the Merrison Committee of Inquiry, headed by Sir Alec Merrison. The Merrison Committee provided an interim report in May 1971, and a final report in February 1973 on new design and workmanship rules for steel box-girder bridges.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Following the publication of the Report of the Royal Commission in August 1971, the Lower Yarra Crossing Authority, a non-profit company,<ref name=":0" /> formed its own Directorate of Engineering. In September 1971, Hans G. Wolfram, FIEAust and a Director of Gutteridge, Haskins & Davey, was appointed the Director of Engineering. He was responsible for the re-design, supervision of construction, and contract administration of West Gate Bridge until its completion. The Chairman of the Lower Yarra Crossing Authority was Oscar G. Meyer.<ref>Template:Cite book</ref> The Deputy Chairman was Bernard J. Callinan, who was also Chairman of the Technical Committee. In 1971, the Authority was renamed as the West Gate Bridge Authority.
Intensive reviews of the structure focused attention on the inadequate strength of the original design of the bridge's deck. This consisted of a 100 mm reinforced concrete slab acting compositely with a steel deck plate stiffened by bulb flats. Numerous proposals were examined and Wolfram recommended replacing the original steel and concrete deck by a lighter and stronger orthotropic steel deck<ref>Template:Cite journal</ref><ref name=":0">Template:Cite journal</ref> as technically and economically the most appropriate solution. This orthotropic deck is a steel plate stiffened longitudinally by closely spaced cellular troughs and laterally, at intervals, by cross beams. The proof engineer was Karlheinz Roik, a professor of steel construction at TU Berlin. He independently checked the re-design of the West Gate Bridge in accordance with the recommendations of the Royal Commission.<ref name=":1">Template:Cite journal</ref> The re-design was also checked against the German code DIN 4114<ref>Template:Cite book</ref> and the Appraisal Rules of the Merrison Committee's reports.<ref name=":0" /><ref name=":1" /> The re-design was endorsed by four other university professors of civil engineering: F.B. Bull (Adelaide), N.W. Murray (Monash),<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> J.W. Roderick (Sydney) and L.K. Stevens (Melbourne).<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Construction resumed in 1972 with World Services and Construction continuing to fabricate the boxes and to carry out their sub-assembly, but with a joint venture between Redpath Dorman Long and John Holland (Constructions) completing the construction of the steel portion of the bridge.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Additional strengthening of the structure had to be designed for the erection because the stresses could exceed those of the in-service condition. The joint venture contractor engaged Flint and Neill of London for this and their design was proof-checked by the Directorate of Engineering.<ref name=":1" />
Charles, Prince of Wales visited the West Gate Bridge project in October 1974 and met with members of the West Gate Bridge Authority and workers.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
After 10 years of construction, the bridge was completed in 1978 at a cost of $202 million.<ref name="M. G. Lay and K. F. Daley">Template:Cite journal</ref><ref>Template:Cite journal</ref>
Speed cameras were erected on the bridge in 2004, but were not activated until September 2005, because of issues with a similar camera on the Western Ring Road.<ref>Template:Cite news</ref> However these speed cameras were switched off in 2005, and currently remain disabled, as the sway of the bridge prevents secondary verification of the alleged speed against a fixed point.<ref>Template:Cite news</ref> In 2006 the State Government spent $1.3 million on erecting railway style boom barriers at each entrance to the bridge to block traffic in the event of a terrorist attack.<ref>Template:Cite news Template:Dead link</ref> In March 2007, the State Government announced that two flagpoles would be erected atop the main bridge pylons, to fly the Australian and Victorian flags, each being Template:Convert in size and Template:Convert above sea level.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Costing $350,000 to install and $15,000 a year to maintain,<ref>Template:Cite news</ref> the flags were unfurled on 24 September 2008.<ref>Template:Cite news</ref>
On 5 August 2007, it was reported that the Victorian Government was planning a $240 million project to identify and eliminate structural weaknesses in the bridge, with specific concerns including crash barriers, cracking, corrosion and potential buckling. News of the work was prompted by the collapse of the I-35W Mississippi River bridge in Minneapolis. Experts were reported as saying the West Gate was initially designed to carry loads of Template:Convert but now carried B-double trucks weighing up to Template:Convert. The bridge was built to carry 40,000 vehicles a day but volumes had grown to more than four times the original number, approximately 160,000 vehicles on an average day.<ref>Template:Cite news</ref>
ExpansionEdit
On 17 May 2006, the State Government as part of its Meeting Our Transport Challenges plan announced plans to change traffic flow in peak periods on the West Gate Bridge and approaches to it, using a reversible lane to provide five traffic lanes in the peak direction, opposing traffic having three lanes.<ref>Template:Cite report</ref> This was to be done using overhead signals and barriers; the State Government allocated funds to this project in its 2006–2007 state budget,Template:Citation needed but the works were never carried out.
In 2008 the expansion plans were revised as part of the Victorian Transport Plan, when it was announced that the bridge would be widened to five lanes in each direction, the space being gained by narrowing the existing traffic lanes and closing the emergency lanes, in a move criticised by Victorian fire, police and ambulance unions.<ref name=lanes /> Overhead gantries would be used to direct traffic out of lanes when breakdowns and accidents occur. Costed at $240 million, each lane would be Template:Convert wide; by comparison, lanes on the Sydney Harbour Bridge have a width of Template:Convert.<ref name=lanes /> Roads Minister Tim Pallas claimed that the plan would allow the bridge to carry 50 per cent more vehicles, while reducing crashes by 20 per cent.<ref>Template:Cite news</ref> Structural analysis work on the bridge concluded in early 2009, and was completed over a 14-month period. Works to strengthen the bridge commenced in the first half of 2009, with the entire strengthening project scheduled for completion in 2011.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
On 22 June 2011, all five lanes were finally opened to the public in both directions, with the completion of the required strengthening works.<ref name=lanes5 /> The full cost was $347 million, $107 million more than VicRoads had originally planned, but included considerable additional scope of works. This cost increase was after the deletion of $20 million architectural lighting originally included in the scope of the works.<ref name=lanes5>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The engineers for the strengthening project, Flint & Neill and Sinclair Knight Merz, won the 2012 Institution of Structural Engineers Supreme Award for structural engineering for the project.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}Template:Dead link</ref>
FlagsEdit
On 11 March 2014, a 10-metre (33 ft) high artist-designed flag was raised on the western side of the bridge as part of the "Melbourne Now" exhibition, On Top of the World: Flags for Melbourne.<ref name=ngv-flag>Template:Cite press release</ref> The flag was a collaborative design between four contributing artists (Brook Andrew, Helen Johnson, Kate Daw and Jon Campbell<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>) who shared an affinity with the bridge. The flag design is a reference to 1803 maritime communications by Rear Admiral Home Riggs Popham, the symbol on the flag meaning "I can spare what you asked for". The flag was flown until the end of the "Melbourne Now" show on 25 March 2014.<ref>http://www.ngv.vic.gov.au/melbournenow/projects/007 Melbourne Now Template:Webarchive</ref> Since July 2022, the Aboriginal flag will formally fly over the bridge alongside the Australian flag permanently as announced. The cost was not disclosed, as with $25 million for the Sydney Harbour Bridge.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
FutureEdit
Strong growth in suburbs along the route, and increased freight through the Port of Melbourne, means that the corridor is experiencing traffic congestion during peak periods, is vulnerable to short-term interruptions, and is rapidly approaching capacity. Proposals to abate congestion by allowing more traffic have included bridge widening, a tunnel underneath the river, or adding a second deck to the bridge. Many such plans have come under fire from community groups such as the Public Transport Users Association and Environment Victoria, which advocate investment in alternative forms of transport.
A private sector report, made public in February 2006, suggested building a companion tunnel to the West Gate Bridge under the Yarra River, made up of three separate bores to carry traffic in either direction and a freight rail line. The portals would have been north of Williamstown Road in Port Melbourne, and between Blackshaws and Melbourne roads in Altona North.<ref>Template:Cite news</ref><ref>Template:Cite news</ref>
In 2018, work began on the West Gate Tunnel, which is designed to provide an alternative to the West Gate Bridge. Work is expected to finish in 2025.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
The State Government also assessed options for the development of another east–west link in 2008. Sir Rod Eddington, Chairman of the Victorian Major Events Company and former CEO of British Airways, was to head the assessment of the future east–west connections and recommend the best way forward for public transport, road and freight travel for the entire Monash-West Gate corridor. In December 2008, the State Government announced it was planning for such a link, anticipated to be a three-kilometre road tunnel under Footscray and the Maribyrnong River. Linking Dynon and Footscray Roads in the Port of Melbourne precinct to Geelong Road in West Footscray, now known as the East-West Link, its cost is estimated to be up to $10 billion.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
SuicidesEdit
Owing to its height, the bridge became a popular location for suicides, with police data in the early 2000s showing up to one suicide occurring every three weeks at the West Gate Bridge. A 2004 coroner's report recommended anti-suicide fencing or barriers be erected on the bridge to deter people from attempting to end their lives.<ref name=anti>Template:Cite news</ref>
Those who argued for a suicide barrier claimed that most of those who jump from the West Gate Bridge do so through impulse, and that police officers who tried to save jumpers were putting their own lives in danger. There were reported incidents of police officers dangling off the side of the bridge while holding onto would-be jumpers.<ref>Template:Cite news</ref> A 2000 Royal Melbourne Hospital study on people who jumped from the bridge found at least 62 cases between 1991 and 1998. Seven people survived the Template:Convert fall. Around 74 per cent of those who jumped from the bridge were male, with an average age of 33. More than 70 per cent were suffering from mental illness.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Of those who jumped off the West Gate Bridge, 31 per cent fell onto land. Some of those who landed in water drowned afterwards.<ref>Template:Cite journal</ref>
Installation of anti-suicide fencingEdit
In June 2008, Gabriela Garcia jumped off the West Gate Bridge with her 22-month-old son Oliver, and their bodies were found on the river bank below.<ref>Template:Cite news</ref>
Seven months later on 29 January 2009, a 4-year-old girl, Darcey Freeman, was thrown off the bridge by her father, Arthur Freeman. She survived the fall but later died in hospital. Freeman was found guilty of murder and sentenced to life in prison in April 2011;<ref name="West">Template:Cite news</ref> the apparent trigger for the incident was his recent separation and apparent fear of loss of access to the children (similar to the 2005 Robert Farquarson case).
A week after that incident, on 5 February 2009, 17-year-old Allem Halkic jumped from the inbound lanes near the Todd Road exit on the Port Melbourne side of the bridge. On walking up the bridge he was reported to have said to the VicRoads operator via the emergency phone, "You better get someone here before I jump". Police responded within minutes of this, but were too late to save Halkic and found his body in the Westgate Park below. The case was significant as Halkic was a victim of cyberbullying in the days prior to this, and reportedly became the first death resulting from cyberbullying in Victoria. In October 2011 a coronial inquest was held into the death, again recommending (among other things) the installation of anti-suicide barriers on the bridge.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>https://www.heraldsun.com.au/news/special-features/web-of-threats-ended-in-allem-halkics-death/news-story/7adb407178523bf30937b7602cbdb8fc?sv=9da8f1546204ee93797fd7b31b8601 Template:Dead link</ref>
Following these incidents, a temporary suicide barrier of concrete crash barriers topped with a welded mesh fence was erected from February 2009. A permanent metal mesh barrier was subsequently installed along the length of the bridge in 2010–11 at a cost of $20 million.<ref name="lanes">Template:Cite news</ref> The barrier is reported to have reduced suicides from the bridge by 85 per cent.<ref>Template:Cite news</ref>
See alsoEdit
- List of disasters in Australia by death toll
- List of bridge disasters
- Erskine Bridge
- Tasman Bridge
- Suicide bridge
ReferencesEdit
External linksEdit
- West Gate Bridge Memorial
- Public Record Office of Victoria's special site on the Westgate Bridge collapse
- {{#invoke:citation/CS1|citation
|CitationClass=web }} Template:Small 1971
Template:Yarra River Crossings Template:Melbourne landmarks Template:IStructE Supreme Award laureates