The city bids farewell to an iconic L.A. landmark by throwing it one last party before demolition begins in January and its flowy $428-million replacement is completed in 2019.

Concrete cancer did her in:(

Concrete cancer did her in:(

An unusual chemical reaction in the concrete of the bridge’s supports has rendered it seismically unsafe and, sadly, unsalvageable.

An unusual chemical reaction in the concrete of the bridge’s supports has rendered her seismically unsafe and, sadly, unsalvageable.

The 3,500-foot-long bridge, officially known as the Sixth Street Viaduct, is being replaced with a new, modern span because its concrete has cracked and continues to deteriorate, making it vulnerable to an earthquake.

The 3,500-foot-long bridge, officially known as the Sixth Street Viaduct, is being replaced with a new, modern span because its concrete has cracked and continues to deteriorate, making it vulnerable to an earthquake.

There's actually a 70% chance of it coming down in a major earthquake over the next 50 years, so it has to go.

There’s actually a 70% chance of it coming down in a major earthquake over the next 50 years, so it has to go.

Workers have spent the past couple of months preparing detours and other traffic improvements in preparation for next year’s closure and destruction of the bridge...

Workers have spent the past couple of months preparing detours and other traffic improvements in preparation for next year’s closure and destruction of the bridge…

... which will mean motorists, pedestrians and cyclists will have to find a new way to cross the river for at least three years.

… which will mean motorists, pedestrians and cyclists will have to find a new way to cross the river for at least three years.

Instead of a dramatic, Las-Vegas-hotel-like-demolition/explosion, the Sixth Street Bridge will be demolished over a nine month period.

Instead of a dramatic, Las-Vegas-hotel-like-demolition/explosion, the Sixth Street Bridge will be demolished over a nine month period.

Fans of the structure from across the city joined Boyle Heights and Arts District residents for a lively farewell festival.

Fans of the structure from across the city joined Boyle Heights and Arts District residents for a lively farewell festival.

A good street party should always bring people together and this event accomplished that.

A good street party should always bring people together and this event accomplished that.

 Kid art from nearby schools was a nice touch.


Kid art from nearby schools was a nice touch.

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Art Share L.A. is a sanctuary for the arts in DTLA. They maintain a 28,000 sq-ft warehouse in the heart of the arts district and provide 30 subsidized live/work lofts for artists. The also have a community programmed facility offering classes, exhibitions and events.

Art Share L.A. is a sanctuary for the arts in DTLA. They maintain a 28,000 sq-ft warehouse in the heart of the arts district and provide 30 subsidized live/work lofts for artists. The also have a community programmed facility offering classes, exhibitions and events.

FoLAR's mission is to protect and restore the natural and historic heritage of the Los Angeles River and its riparian habitat through inclusive planning, education and wise stewardship.

FoLAR’s mission is to protect and restore the natural and historic heritage of the Los Angeles River and its riparian habitat through inclusive planning, education and wise stewardship.

A 3D attempt of what today's death row bridge and the surrounding area looks like.

A 3D attempt of what today’s death row bridge and the surrounding area looks like.

My only complaint was with the chain-link fencing that was put up along both side of the bridge. I understand this was done for safety reasons but it still sucked.

My only complaint was with the chain-link fencing that was put up along both side of the bridge. I understand this was done for safety reasons but it still sucked.

Raul Barraza, holding his boa constrictor, was quite the attraction at Saturday's festival.

Raul Barraza, holding his boa constrictor, was quite the attraction at Saturday’s festival.

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The new 6th Street Bridge is expected to open in 2019 and will echo the design of the old one: a four-lane road framed by curved arches of varying heights following the approximate path of a stone skipped across a pond.

The new 6th Street Bridge is expected to open in 2019 and will echo the design of the old one: a four-lane road framed by curved arches of varying heights following the approximate path of a stone skipped across a pond.

The new design will feature multiple, swooping arches—known as “The Ribbon of Light".

The new design will feature multiple, swooping arches—known as “The Ribbon of Light”.

It is expected to feature parks, public art and other community features, as well as dedicated bike lanes and pedestrian walkways.

It is expected to feature parks, public art and other community features, as well as dedicated bike lanes and pedestrian walkways.

Planners imagine the bridge as one that dedicates equal space to pedestrians, bicyclists and cars and integrates the two very different communities it connects.

Planners imagine the bridge as one that dedicates equal space to pedestrians, bicyclists and cars and integrates the two very different communities it connects.

This model was also shown during the recent groundbreaking ceremony which took place in February 2015.

This model was also shown during the recent groundbreaking ceremony which took place in February 2015.

The design of the bridge was created by Los Angeles architect Michael Maltzan, winner of the City’s international design contest in 2012

The design of the bridge was created by Los Angeles architect Michael Maltzan, winner of the City’s international design contest in 2012. The Sixth Street Viaduct Replacement Project, is the largest bridge project in the history of Los Angeles.

The spectacular design of the new bridge and the many parks, open spaces and community features on, next to and below the bridge, is bringing together a working collaboration of residents, elected officials, business leaders, schools, labor unions, cyclists, neighborhood activists and artists and many more, never before seen in a public infrastructure project in Los Angeles.

The spectacular design of the new bridge and the many parks, open spaces and community features on, next to and below the bridge, is bringing together a working collaboration of residents, elected officials, business leaders, schools, labor unions, cyclists, neighborhood activists and artists and many more, never before seen in a public infrastructure project in Los Angeles.

The spectacular design of the new bridge and the many parks, open spaces and community features on, next to and below the bridge, is bringing together a working collaboration of residents, elected officials, business leaders, schools, labor unions, cyclists, neighborhood activists and artists and many more, never before seen in a public infrastructure project in Los Angeles.

The project is expected to create hundreds of jobs, adding to the already vital economy of central Los Angeles and its neighbors.

This bitch knows how to throw a party.

This bitch knows how to throw a party.

Constructed in 1932, the Sixth Street Viaduct (also known as the Sixth Street Bridge) is an important engineering landmark in the City of Los Angeles. It is one of a set of fourteen historic Los Angeles River crossing structures, and is the longest of these structures.

Constructed in 1932, the Sixth Street Viaduct (also known as the Sixth Street Bridge) is an important engineering landmark in the City of Los Angeles. It is one of a set of fourteen historic Los Angeles River crossing structures, and is the longest of these structures.

The old bridge has a 46 foot wide, four-lane roadway with 11-foot eastbound and westbound inside traffic lanes and 12-foot outside lanes with no shoulders.

The old bridge has a 46 foot wide, four-lane roadway with 11-foot eastbound and westbound inside traffic lanes and 12-foot outside lanes with no shoulders.

It was constructed using then state-of-the-art concrete technology and an onsite mixing plant.

It was constructed using then state-of-the-art concrete technology and an onsite mixing plant.

However, just 20 years after the Sixth Street Viaduct was constructed the cement supports began to disintegrate due to a chemical reaction known as Alkai Silica Reaction (ASR), causing significant deterioration of the structure.

However, just 20 years after the Sixth Street Viaduct was constructed the cement supports began to disintegrate due to a chemical reaction known as Alkai Silica Reaction (ASR), causing significant deterioration of the structure.

In addition to its vulnerability to collapse under predictable seismic forces, the Sixth Street Viaduct also has geometric design and safety deficiencies.

In addition to its vulnerability to collapse under predictable seismic forces, the Sixth Street Viaduct also has geometric design and safety deficiencies. The viaduct is composed of three independent structures: the reinforced concrete west segment, the central steel arch segment over the river, and the reinforced concrete east segment.

One of the best features of the bridge is the tunnel that leads down to the river itself.

One of the best features of the bridge is the tunnel that leads down to the river itself.

Wildlife

Wildlife

River [sh]Art

River [sh]Art

The current bridge and the river below it has appeared in lots of movies, including Grease, Drive, and Terminator 2.

The current bridge and the river below it has appeared in lots of movies, including Grease, Drive, and Terminator 2.

Today you can still find people with cars here and it's even a great place to take a dog, just don't let them harass the wildlife like this guy did.

Today you can still find people with cars and dogs walking along its concrete encased bottom.

Greedy Bastards

Greedy Bastards

Rat Race or Frat Race? You decide.

Rat Race or Frat Race? You decide.