Tuesday, October 25, 2016

To tear down the Sixth Street Bridge, L.A. will also have to close the 101

sixth street bridge

BOYLE HEIGHTS —  The demolition of the Sixth Street Bridge, which was supposed to have begun earlier this month but was postponed, is now back on for February, officials announced today. That’s not all. The demolition work will require a 40-hour shutdown of the 101 Freeway that runs underneath part of the span.

The bridge linking Boyle Heights and Downtown will be closed to traffic by the end of this month. Demolition begins on the east end of the bridge over the 101 Freeway during the first weekend of February. That same weekend — from Friday, February 5 at 10 p.m. until Sunday, Feb. 7 at 2 pm —  a roughly one-mile section of the freeway will be closed in both directions.

“For safety reasons, the freeway will be closed to thru traffic for 40 hours to facilitate demolition overhead,” said a statement issued by the Bureau of Engineering.

The 3,500-foot-long bridge, officially known as the Sixth Street Viaduct, is being replaced with a new, $420 million span because its concrete has cracked and continues to deteriorate, making it vulnerable to an earthquake, say city officials.

Here’s a description of the closure and detours provided by the city:

When traveling N/B 5 from the Orange County area approaching the 5/10/101 Interchange:

– Exit to N/B 101 closed

– Exit to W/B 10 open

– Exit to N/B 5 open

Primary Detour: N/B 710 to W/B 10

Secondary Detour: W/B 10 to N/B 110

When traveling W/B 60 from the Pomona area approaching 5/10/101 Interchange:

– Exit to N/B 101 closed

– Exit to W/B 10 open

– Exit to N/B 5 open

Primary Detour: N/B 710 to W/B 10

Secondary Detour: W/B 10 to N/B 110

When traveling S/B 101 from the San Fernando Valley area approaching the 10/101 Split:

– Exit to S/B 101 closed

– W/B 10 open

Primary Detour: S/B 110 to E/B 10

Secondary Detour: E/B 10 to S/B 710

101 Freeway On-Ramp closures will be as follows:

NB 6th Street/ Whittier Blvd on-ramp CLOSED

NB Euclid Street on-ramp CLOSED

NB Soto Street to 101 Freeway CLOSED

SB Commercial Street on-ramp CLOSED

SB Mission Street on-ramp CLOSED

SB 4th Street on-ramp CLOSED

freeway detours

Detour Closure Plan for Feb. 5 – Feb. 7 | Department of Engineering

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  1. Natural experiment time!

    Measure on-street traffic throughout this period, measure air pollution, etc. What is the impact of closing this portion of freeway?

    We’ll have our chance to find out. Will the AQMD, CalTrans, the LADOT, et al. find out?

    • Sounds like a good idea, the challenge would be to separate out the dust, particles and pollution coming from the demolition of the bridge and the diesel equipment used to facilitate that demolition.

      If you’ve ever seen a video of a building being demolished the amount of dust stirred up is insane. Not saying it can’t be done but in order to do it right and take accurate measurements this experiment would most likely need lots of time and planning to execute properly.

      • Good point. Measuring CO2, diesel exhaust, and other air pollutants in the areas further away from the demo but still close to the freeway might be a good way of measuring with minimal impact from dust, etc.

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