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I-405 Improvement Project construction alert: Week of Oct. 12

For more information about this project, please contact the 405 Community Outreach Team at [email protected] or 888-400-8994, or visit octa.net/405improvement.

To view and print a detailed list of closures and detours CLICK HERE!

Click to see closures and detours on the interactive map.

UPDATE! Bushard Street Bridge Open

The Bushard Street bridge is now open to traffic.

COMING SOON! McFadden Avenue Bridge Opening to Traffic

The McFadden bridge is set to open to traffic on Friday, Oct. 16, 2020. Crews are busy installing conduits, pouring concrete barriers and sidewalks, installing fencing, and sealing joints between the bridge abutments and the main bridge structure.

COMING SOON! Brookhurst Street Bridge Partial Demolition

Crews shifted traffic to the west side of the Brookhurst Street bridge over I-405 in anticipation of partial demolition.

Predemolition activities have begun and the first half of the bridge will be demolished over two nights. This work will require full closures in both directions of I-405 and Brookhurst.

  • Night One: 10:30 p.m. Saturday, Oct. 17, to 9 a.m. Sunday, Oct. 18
  • Night Two: 10:30 p.m. Saturday, Oct. 24, to 9 a.m. Sunday, Oct. 25

Additional nighttime demolition will occur for several weeks under freeway lane closures. Some daytime demolition also is anticipated.

Sign up to receive updates specific to Brookhurst bridge construction via email, call or text at bit.ly/405-signup

COMING SOON! Edinger Avenue Bridge Closure and Demolition

The Edinger Avenue bridge is set to close Friday, Oct. 23, for approximately 18 months as part of the freeway widening.

In addition, crews are scheduled to demolish the Edinger bridge over two weekend nights, under full freeway closures, after the the bridge is closed.

The 405 Community Outreach Team will provide detailed closure, detours and schedule information in future alerts.

Please be advised that this work may be loud.

Sign up to receive updates specific to Edinger bridge construction via email, call or text at bit.ly/405-signup

UPDATE! Full Northbound (NB) and Southbound (SB) Harbor Boulevard Closures for Falsework Installation

Crews are constructing falsework for the widened I-405 bridge over Harbor Boulevard. This work will require full closures of NB and SB Harbor between the I-405 loop off-ramps.

Nightly closures are set to begin 10 p.m. to 5 a.m. Wednesday, Oct. 14 and continue:

  • 10 p.m. to 5 a.m. Mondays through Thursdays
  • 10 p.m. to 7 a.m. Fridays

The closures are set for approximately three weeks.

REMINDER! Northbound (NB) I-405 Loop On-Ramp from Harbor Boulevard to Close for Approximately One Month

Crews will close the NB I-405 loop on-ramp from Harbor for approximately one month to accommodate the freeway widening.

The ramp is set to close at 10 p.m. Wednesday, Oct. 14.

UPDATE! Full Southbound (SB) Full Freeway Closures for Magnolia Street Bridge Falsework Installation

Crews are constructing the falsework for the Magnolia Street bridge over I-405. This work will require full SB full freeway closures between Magnolia and Warner Avenue.

SB I-405 nightly closures are set to continue 11 p.m. to 5 a.m. Thursday, Oct. 15, and again on Monday, Oct. 19, to Wednesday, Oct 21 (if needed). No closures will be scheduled on Fridays.

*Only one direction is planned to be closed on Oct. 21. If SB work has not been completed, it will be closed. Otherwise, NB will be closed

NEW! Full Northbound (NB) Full Freeway Closures for Magnolia Street Bridge Falsework Installation

Crews are constructing the falsework for the Magnolia Street bridge over I-405. This work will require full NB full freeway closures between Warner Avenue and Magnolia.

NB I-405 nightly closures are set to continue TONIGHT 11 p.m. to 5 a.m. Wednesday, Oct. 14, and Wednesday, Oct. 21 (if needed). No closures will be scheduled on Fridays.

*Only one direction is planned to be closed on Oct. 21.

UPDATE! Northbound (NB) Beach Boulevard Lane Reductions

Crews will continue bridge work on the I-405 bridge over Beach Boulevard. This work will reduce NB Beach Boulevard to one lane between McFadden Avenue and Edinger Avenue.

The lane reductions are set for 11 p.m. to 5 a.m. Thursday, Oct. 15.

NEW! Full Southbound (SB) Freeway Closure for Overhead Sign Removal

Crews are scheduled to close SB I-405 to remove an overhead sign structure. This work will require a full SB I-405 closure between Seal Beach Boulevard and SR-22. The SB I-405/Eastbound SR-22 connector will also be closed.

The closure is set for 11 p.m. Saturday, Oct. 17, to 7 a.m. Sunday, Oct. 18.

NEW! Southbound (SB) I-405 Off-Ramp from Harbor Boulevard to Close for Approximately One Month

Crews will close the SB I-405 off-ramp from Harbor* for approximately one month to accommodate the freeway widening.

The ramp is set to close as early as 10 p.m. Tuesday, Oct. 20.

*The SB I-405 straight on-ramp will be closed concurrently during the day and will remain open during Harbor falsework activities at night.

Construction Activities

Edwards Street

REMINDER! Crews will continue installing piles for the foundation for the Edwards bridge over I-405.

Beginning Friday, Oct. 9, 7 a.m. to 4 p.m. for up to one month.

Crews may mobilize mobilize equipment as early as 6 a.m., and some activities may occur at night.

Magnolia Street

The NB I-405 on-ramp from SB Magnolia is closed and anticipated to open to traffic on Thursday, Oct. 22. The ramp is being reconstructed as part of the freeway widening project.

Warner Avenue

The NB I-405 on-ramp from Warner is closed and anticipated to open to traffic on Thursday, Oct. 15. The ramp is being reconstructed as part of the freeway widening project.

Heil Avenue

REMINDER! Heil Avenue/ Landau Lane Closure

Crews are constructing the foundation for the Heil Avenue pedestrian bridge over I-405. This requires a two week closure of Heil between Ross Lane and Landau Lane.

The closure is set to continue for approximately two weeks.

Activities are set for 7 a.m. to 4 p.m. on weekdays and on Saturdays, if needed.

Crews may mobilize equipment as early as 6 a.m. and some activities may occur at night.

Residential access will be maintained, and flaggers will be on-site to manage traffic. Please be advised that this work may be loud.

Vermont Street

Crews are set to work on the foundation of the wall along southbound (SB) I-405, behind homes on Vermont Street. The foundation consists of approximately 180 cast-in-drilled-hole (CIDH) piles. This activity includes augering large holes, and installing rebar cages and pouring concrete into the holes to form the piles.

Activities are set as early as Monday, Oct. 19, 7 a.m. to 4 p.m. on weekdays, for approximately two months.

Crews may mobilize equipment as early as 6 a.m. and some activities may occur at night.

Bolsa Chica Road

COMING SOON! Crews will begin installing piles for the foundation of the center columns for the Bolsa Chica bridge over I-405, in the center median, west of the Bolsa Chica bridge.

The 405 Community Outreach Team will provide detailed schedule information in future alerts.

Orange County Sanitation District

REMINDER! Crews are replacing sewer lines on Westminster Boulevard between Seal Beach Boulevard and Bolsa Chica Road.

Click here for more details.

The duration of this work may change depending on site conditions. Please be advised that this work may be loud. Dates and times are subject to change due to unforeseen operational factors or inclement weather.

This article was released by the Orange County Transportation Authority.