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I-405 Improvement Project construction alert: Week of Oct. 5

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.

COMING SOON! Bushard Street Bridge Opening

The Bushard Street bridge is set to reopen Monday, Oct. 12. Crews and water trucks are in the area to prepare for the bridge opening.

UPDATE! Brookhurst Street Bridge Traffic Shift and Median Removal

Crews will shift traffic to the west side of the Brookhurst bridge over I-405 to create a work zone for demolition of the first half of the bridge. This work will require a full closure of Brookhurst between Talbert Avenue and Slater Avenue.

As part of this work, the northbound (NB) and southbound (SB) loop-off ramps to Brookhurst will be closed permanently. Temporary off-ramps are being constructed for access to NB and SB Brookhurst.

The Brookhurst closure is set for 10 p.m. to 5 a.m. Monday, Oct. 12, to Tuesday, Oct. 13.

In addition, crews are scheduled to demolish the Brookhurst bridge over two weekend nights, under full freeway closures, once the traffic shift is completed.

Please be advised that this work may be loud.

The 405 Community Outreach Team will provide detailed closure, detour and schedule information for the Brookhurst traffic shift and partial demolition in future alerts.

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

COMING SOON! McFadden Avenue Bridge Opening to Traffic

The McFadden bridge is set to open to traffic in less than two weeks. Crews are busy installing conduits, pouring concrete barriers and sidewalks, installing fencing, and sealing joints between the bridge abutments and the main bridge structure. The opening was delayed, according to the contractor, primarily due to a temporary shortage of cement/concrete.

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

COMING SOON! Edinger Avenue Bridge Closure and Demolition

About one week after the McFadden bridge opens to traffic, crews are scheduled to close the Edinger bridge. Following a week of predemolition activities, complete demolition of the bridge is scheduled to occur in late October and early November.

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

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 will construct 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 for 10 p.m. to 5 a.m. Monday, Oct. 12, for approximately 3 weeks on weekdays and 10 p.m. to 7 a.m. on Fridays and Saturdays.

NEW! Full Southbound (SB) Full Freeway Closures for Goldenwest Street Bridge Falsework Removal

Crews will be removing falsework for the I-405 bridge over Goldenwest Street bridge. This work will require full closures of SB I-405 between Goldenwest and Bolsa Avenue.

The closure is set for 11 p.m. to 5 a.m. Friday, Oct. 16 to Saturday, Oct. 17.

UPDATE! Fairview Road Bridge Waterline Installation

Crews are installing a waterline for the Fairview Road bridge over I-405. This work will require northbound (NB) and southbound (SB) I-405 closures.

NB SR-73 to NB I-405 connector will be closed and NB I-405 will be reduced to two lanes 11 p.m. to 5 a.m.:

  • Wednesday, Oct. 7; and
  • Thursday, Oct. 8 (if needed).

SB I-405 will be closed 11 p.m. to 5 a.m.:

  • Thursday, Oct. 8;
  • Friday, Oct. 9; and
  • Saturday, Oct. 10 (if needed).

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 and between Magnolia and Warner Avenue.

SB I-405 nightly closures are set to continue 11 p.m. to 5 a.m. Wednesday, Oct. 7, and Thursday, Oct. 8, and again Monday, Oct. 12 to Thursday, Oct. 14*.

*Only one direction is planned to be closed on Oct. 14. If SB work has not been completed, it will be closed. Otherwise, northbound (NB) will be closed.

REMINDER! Full Northbound (NB) and Southbound (SB) Euclid Street Closures

Crews are installing precast concrete girders for the widened freeway bridge over the Santa Ana River and Euclid Street. The girders are the main horizontal support beams for the new sections of the bridge.

A portion of this work will require full NB and SB Euclid Street closures between Condor/Mt. Washington and the SB freeway ramps. Residential and business access will be maintained.

Closures are set for:

  • Night One: 10 p.m. Thursday, Oct. 8, to 5 a.m. Friday, Oct. 9
  • Night Two: 9 p.m. Friday, Oct. 9, to 6 a.m. Saturday, Oct. 10
  • Night Three (if needed): 9 p.m. Saturday, Oct. 10, to 6 a.m. Sunday, Oct. 11

REMINDER! Heil Avenue/ Landau Lane Closure

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

The closure is set to begin as early as 6 a.m. Monday, Oct. 12, and 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.

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 and between Warner Avenue and Magnolia.

NB I-405 nightly closures are set for 11 p.m. to 5 a.m. Wednesday, Oct. 14*, and Thursday, Oct. 15, and again Monday, Oct. 19 to Thursday, Oct. 22.

*Only one direction is planned to be closed on Oct. 14. If SB work has not been completed, it will be closed. Otherwise, NB will be closed.

UPDATE! 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 as early as 10 p.m. Wednesday, Oct. 14.

NEW! Full Southbound (SB) Freeway Closure for Seal Beach Boulevard Sign Removal

Crews are scheduled to close SB I-405 to remove an overhead sign structure. This closure will take place between Seal Beach Boulevard and SR-22.

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 and will remain open during Harbor falsework activities.

Construction Activities

Edwards Street

COMING SOON! Crews will begin installing piles for the foundation for the Edwards bridge over I-405.

Beginning as early as 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

REMINDER! Northbound (NB) I-405 On-Ramp from Magnolia Street Closed for Approximately One Month

The NB I-405 on-ramp from SB Magnolia is closed for approximately one month. The ramp is being reconstructed as part of the freeway widening project.

Warner Avenue

REMINDER! Northbound (NB) I-405 On-Ramp from Warner Avenue Closed for Approximately One Month

The NB I-405 on-ramp from Warner is closed for approximately one month. The ramp is being reconstructed as part of the freeway widening project.

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.