The Sixth Street Viaduct is a viaduct bridge that connects the downtown and Boyle Heights areas of Los Angeles, California. It spans the Los Angeles River, the Santa Ana Freeway (US 101), and the Golden State Freeway (I-5), as well as Metrolink and Union Pacific railroad tracks and several local streets. 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.

In 1986, the Caltrans bridge survey found the 6th Street Viaduct eligible for inclusion in the National Register of Historic Places.

During the construction of the viaduct, an on-site plant was used to supply the concrete for construction. However, the quality of the concrete turned out to have a high alkali content and lead to an alkali-silica reaction which creates cracks in the concrete and saps the strength of the structure.

Current estimates are that the viaduct has a 70% probability of collapse due to a major earthquake within 50 years.

It is one of the only historic LA River bridges to suffer from ASR.

Popular TV & Films featuring the Viaduct Films

To Live and Die in L.A.
Freaky Friday
Be Cool
National Security
Terminator 2
Repo Man
The Mask
Blue Thunder

Music Videos
Madonna – What It Feels Like For A Girl
Transplants  – Gangsters and Thugs
single System of a Down – Lonely Day
INXS – Afterglow
Pussycat Dolls – Stickwitu
Blink 182 – Down
Kanye West – Jesus Walks
Kid Rock – American Bad Ass
Ne-Yo – Beautiful Monster
Avril Lavigne – What The Hell


Lost episode of Through the Looking Glass
The starting location of The Amazing Race 15