The Sea Cliff Bridge, together with the adjoining Lawrence Hargrave Drive Bridge, are two

road bridge A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path underneath. It is constructed for the purpose of providing passage over the obstacle, whi ...

s that carry the scenic

Lawrence Hargrave Drive Lawrence Hargrave Drive, part of the Grand Pacific Drive, is a scenic coastal road and popular tourist drive connecting the northernmost suburbs of Wollongong, New South Wales, Australia, to Wollongong, in the south, and Sydney, in the nort ...

across the rockface on the

Illawarra The Illawarra is a coastal Regions of New South Wales, region in the southeast of the Australian state of New South Wales. It is situated immediately south of Sydney and north of the South Coast, New South Wales, South Coast region. It encompas ...

escarpment, located in the northern Illawarra region of

New South Wales New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

. The balanced

cantilever A cantilever is a rigid structural element that extends horizontally and is unsupported at one end. Typically it extends from a flat vertical surface such as a wall, to which it must be firmly attached. Like other structural elements, a cantilev ...

and incremental launching

girder bridge A girder bridge is a bridge that uses girders as the means of supporting its deck. The two most common types of modern steel girder bridges are plate and box. The term "girder" is often used interchangeably with "beam" in reference to bridge d ...

s link the coastal villages of

Coalcliff Coalcliff is a town on the coast of New South Wales, Australia, between Sydney and Wollongong. History In 1796 William Clark and others trekking north to Port Jackson from the wrecked ship ''Sydney Cove'' noticed coal exposed at the cliffs t ...

and Clifton and carry two lanes of traffic, and a

pedestrian A pedestrian is a person traveling on foot, by wheelchair or with other mobility aids. Streets and roads often have a designated footpath for pedestrian traffic, called the '' sidewalk'' in North American English, the ''pavement'' in British En ...

walkway. The Sea Cliff Bridge was named by Makenzie Russell, who at the time was an eleven-year-old student, following a naming competition opened to local primary school students. The Lawrence Hargrave Drive Bridge and the Lawrence Hargrave Drive are named in honour of

Lawrence Hargrave Lawrence Hargrave, MRAeS, (29 January 18506 July 1915) was an Australian engineer, explorer, astronomer, inventor and aeronautical pioneer. He was perhaps best known for inventing the box kite, which was quickly adopted by other aircraft desig ...

, an Australian engineer, explorer, astronomer, inventor and aeronautical pioneer.

History

The Sea Cliff Bridge replaced a section of Lawrence Hargrave Drive that was permanently closed in August 2003 due to regular rock falls. A public outcry emerged over the road closure as Lawrence Hargrave Drive is the only road directly linking Coalcliff, Stanwell Park,

Otford Otford is a village and civil parish in the Sevenoaks District of Kent, England. It lies on the River Darent, north of Sevenoaks. Otford's four churches are the Anglican Church of St Bartholomew in the village centre, the Otford Methodist C ...

and

Helensburgh Helensburgh ( ; ) is a town on the north side of the Firth of Clyde in Scotland, situated at the mouth of the Gareloch. Historically in Dunbartonshire, it became part of Argyll and Bute following local government reorganisation in 1996. Histo ...

to the northern suburbs of

Wollongong Wollongong ( ; Dharawal: ''Woolyungah'') is a city located in the Illawarra region of New South Wales, Australia. The name is believed to originate from the Dharawal language, meaning either 'five islands/clouds', 'ground near water' or 'sound ...

Description

The 52 million bridges brace against the

Tasman Sea The Tasman Sea is a marginal sea of the South Pacific Ocean, situated between Australia and New Zealand. It measures about across and about from north to south. The sea was named after the Dutch explorer Abel Janszoon Tasman, who in 1642 wa ...

, up to east of the original alignment of Lawrence Hargrave Drive. Completed in 2005, the Sea Cliff Bridge structure comprises a haunched

box girder A box girder or tubular girder (or box beam) is a girder that forms an enclosed tube with multiple walls, as opposed to an i-beam, - or H-beam. Originally constructed of wrought iron joined by riveting, they are now made of rolled steel, rolled ...

composed of

prestressed concrete Prestressed concrete is a form of concrete used in construction. It is substantially prestressed (Compression (physics), compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. Post-t ...

that was constructed using the balanced cantilever method, with five spans. Adjoining the Sea Cliff Bridge is the Lawrence Hargrave Drive Bridge often not considered as two separate bridges. This latter

that was constructed using the incremental launching method, with seven spans, ranging from , shares a common pier with the Sea Cliff Bridge. The bridges incorporate two traffic lanes of and a pedestrian pathway. Cyclists are allowed to use the traffic lanes and there are shoulders on either side of the road of approximately 1.2 metres (4 ft) width. The bridges were officially opened by the NSW Premier

Morris Iemma Morris Iemma (; born 21 July 1961) is an Australian former politician who was the 40th Premier of New South Wales, serving from 3 August 2005 to 5 September 2008. From Sydney, Iemma attended the University of Sydney and the University of Techn ...

on 11 December 2005, and were met with public approval and increased business for the area's tourism industry. The bridges sit in a harsh marine environment as it directly faces the open ocean and is affected by high

sea swell A swell, also sometimes referred to as ground swell, in the context of an ocean, sea or lake, is a series of mechanical waves that propagate along the interface between water and air under the predominating influence of gravity, and thus are oft ...

splashing. It is well attested that concrete structures in such environments are especially susceptible to

chloride The term chloride refers to a compound or molecule that contains either a chlorine anion (), which is a negatively charged chlorine atom, or a non-charged chlorine atom covalently bonded to the rest of the molecule by a single bond (). The pr ...

induced

corrosion Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engine ...

of the steel reinforcement, which can eventually lead to expensive repair works and significantly decrease the life of the structure.

Tourism

An hour south of Sydney, the bridges have been a major tourist spot since they opened in 2005. The area adjacent to the bridges feature a scenic walkway surrounded by rocky cliffs that is a popular location for love padlocks. ''Pioneer Walks'' published the route to the lookout and encouraged spectators to participate in an "unofficial walk with no safety precautions in place". On 30 September 2018, a 24-year-old man hiked to the “lookout" atop the cliff overlooking the bridges, where he sat down to take a rest. The ground he sat on was loose, and he slid to the cliff’s edge, where he then plummeted to his death.

In popular media

The Sea Cliff Bridge and adjoining Lawrence Hargrave Drive Bridge were featured in a range of media including: * a joint 2007

Ferrari Ferrari S.p.A. (; ) is an Italian luxury sports car manufacturer based in Maranello. Founded in 1939 by Enzo Ferrari (1898–1988), the company built Auto Avio Costruzioni 815, its first car in 1940, adopted its current name in 1945, and be ...

Shell Shell may refer to: Architecture and design * Shell (structure), a thin structure ** Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses Science Biology * Seashell, a hard outer layer of a marine ani ...

television advertisement that was shown in Australia and many other countries. * a VE

Holden Commodore The Holden Commodore is a series of automobiles that were sold by now-defunct Australian manufacturer Holden from 1978 until 2020. They were manufactured from 1978 to 2017 in Australia and from 1979 to 1990 in New Zealand, with production of ...

commercial * the video game, ''

Forza Horizon 3 ''Forza Horizon 3'' is a 2016 racing video game developed by Playground Games and published by Microsoft Studios for the Xbox One and Windows. It is the ninth instalment in the ''Forza'' series and the third instalment in the ''Forza Horizon'' ...

'', where players can race over the bridge *in

Guy Sebastian Guy Theodore Sebastian (born 26 October 1981) is an Australian singer who rose to fame after winning the Australian Idol (season 1), first season of ''Australian Idol'', in 2003. Born in Malaysia and raised in Adelaide, Australia, Sebastian h ...

's music video for the song '

Choir A choir ( ), also known as a chorale or chorus (from Latin ''chorus'', meaning 'a dance in a circle') is a musical ensemble of singers. Choral music, in turn, is the music written specifically for such an ensemble to perform or in other words ...

', where he is seen walking under the Sea Cliff Bridge

Gallery

File:Sea Cliff Bridge - Stanwell Park.jpeg, Sea Cliff Bridge looking south File:Seacliff Bridge Pathway.jpg, The footpath on Sea Cliff Bridge File:Sea Cliff Bridge.jpg, A photo taken from road level File:Looking down to Sea Cliff Bridge.jpg, Looking down onto Sea Cliff Bridge from the south

References

External links

Sea Cliff Bridge Webcam

Sea Cliff Bridge website

Grand Pacific Drive

Roads & Traffic Authority The Roads & Traffic Authority (RTA) was an Statutory authority, agency of the Government of New South Wales responsible for major road infrastructure, licensing of drivers, and registration of motor vehicles. The RTA directly managed state ...

Northern Illawarra Online - Community Web Portal

HangglideOz - tandems and lic courses
{{Road infrastructure in regional New South Wales, state=collapsed 2005 establishments in Australia Wollongong Bridges completed in 2005 Tourist attractions in Wollongong Cantilever bridges in Australia Road bridges in New South Wales Concrete bridges in Australia Box girder bridges in Australia