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I-405 Improvement Project construction alert: Week of April 19

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!

NEW! If you are currently receiving the I-405 Improvement Project automated call and text alerts, you will notice that these alerts will now start coming to you from our Project Helpline number (888-400-8994.) This will now allow you to call us right back and leave us a message if you have any questions or concerns about the project.

To opt out of text message alerts, simply reply “STOP”

To opt out of automated calls, simply press the number “7” on your phone’s keypad

Click to see closures and detours on the interactive map.

REMINDER! Full Northbound (NB) and Southbound (SB) I-405 Freeway Closures for Ward Avenue Bridge Demolition

Crews will demolish the Ward bridge over the I-405. The main sections of the bridge will be fully demolished in one night, over the weekend, under full freeway closures.

Additional demolition on remaining portions of the bridge will occur during the day and at night for several weeks.

The NB and SB I-405 freeway closures are set for 10 p.m. Saturday, April 24, to 8 a.m. Sunday, April 25.

Please be advised that this work may be loud.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.

UPDATE! Talbert Avenue Bridge is now Open to Traffic!

The Talbert bridge is now open to traffic.

Remaining activities include final paving and striping, installing steel railing, adding bridge lighting, completing the eastbound sidewalk, and installing irrigation and landscaping

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.

REMINDER! Full Closures of Bolsa Avenue Bridge Continue for Waterline Installation Work

Crews are continuing waterline work on the Bolsa bridge over I-405. This work requires a full closure of Bolsa between Goldenwest Street and Chestnut Street.

The nightly bridge closure is anticipated to continue 9 p.m. to 5 a.m. weeknights until Friday, April 30.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.

REMINDER! Full NB and SB I-405 Freeway Closures for Brookhurst Street Bridge Falsework Installation

Crews will begin installing falsework for the Brookhurst Street bridge over I-405. This work will require partial and full closures of the NB and SB I-405 between Talbert Avenue and Slater Avenue. Additionally, crews will close the NB and SB I-405 on-ramps from Brookhurst.

SB I-405 freeway nightly closures are anticipated to begin as early as 10 p.m. to 5:30 am, Wednesday, April 21, to Tuesday, April 27* on weeknights.

NB I-405 freeway nightly closures are anticipated to begin as early as 10 p.m. to 5:30 am, Tuesday, April 27*, to Wednesday, May 5 on weeknights.

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

COMING SOON! Full Ellis Avenue Closures for Drainage Work

Crews will perform drainage work for the I-405 widened bridge over Euclid Street/Ellis. This work will require full closures of Ellis between SB freeway ramps and Pacific Street.

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

COMING SOON! NB I-405 On-Ramp from Westminster Boulevard to Close for Approximately 38 Days

Crews will close the NB I-405 on-ramp from Westminster to accommodate the freeway widening in early May.

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

REMINDER! Partial Lane Closures on Seal Beach Boulevard for Temporary Signal Work

Crews will continue traffic signal construction work at the intersection of Seal Beach Boulevard and Lampson Avenue and the intersection of Seal Beach Blvd. and the NB I-405 freeway ramps.

Activities include the installation of temporary wooden poles, traffic signal heads and electrical work.

Temporary traffic signal construction is ongoing 10 p.m. to 5 a.m. for one more night.

Seal Beach Blvd. and Lampson Ave. will be intermittently reduced to two lanes at the intersection for the duration of the work.

REMINDER! Bolsa Chica Road Sidewalk Closure

Crews closed the sidewalk at the intersection of Old Bolsa Chica Road and Bolsa Chica Road for sidewalk, curb, pedestrian ramp and traffic signal construction on April 6, for approximately two months.

Activities include k-rail placement, demolition and restriping on Old Bolsa Chica Road.

COMING SOON! Lane Closures on McFadden Bridge for Monument Work

Crews will continue constructing the McFadden bridge monument over I-405. This work will require lane reductions on McFadden in each direction between Pacific Street and Vermont Street.

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

REMINDER! Nightly Consecutive Ramp Closures Scheduled for Approximately Six Months

Nightly closures of the following ramps will be scheduled, as needed, until May 2021 to support bridge construction activities at Magnolia and Brookhurst:

  • SB I-405 Loop On-Ramp from Magnolia
  • SB I-405 On-Ramp from Warner Avenue
  • SB I-405 Loop On-Ramp from Brookhurst

Closure hours are:

  • 10 p.m. to 5 a.m. weeknights
  • 10 p.m. to 7 a.m. weekends

REMINDER! NB I-405 Loop Off-Ramp to Bolsa Avenue Closed Intermittently for Approximately One Month

Crews are closing the NB I-405 loop off-ramp to Bolsa intermittently for approximately one month on weeknights and Saturdays to work on a retaining wall.

NB I-405 intermittent ramp closures areongoing 8 p.m. to 6 a.m. as needed.

REMINDER! Westbound (WB) SR-22 On-Ramp from Old Ranch Parkway Closed for Approximately 8 Months

Crews closed the Old Ranch Parkway on-ramp to the WB SR-22 on April 13, forapproximately 8 months to accommodate the freeway widening.

Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours and asphalt paving.

  • Daytime work hours are 7 a.m. to 4 p.m.
  • Crews may mobilize equipment as early as 6 a.m.
  • Nighttime work hours are 9 p.m. to 6 a.m.

REMINDER! Nightly SB I-405 Freeway Closures between Magnolia and Brookhurst for Bridge Work

Nightly SB I-405 closures are scheduled to continue for Brookhurst Street bridge construction. Activities include equipment mobilization, pile installation, shoring installation, falsework installation and grading, and column demolition of the old half of the Brookhurst bridge.

SB I-405 will be closed between Magnolia and Brookhurst.

The nightly closures are set to continue 11 p.m. to 5 a.m. on weeknights for approximately three weeks, as needed.

REMINDER! NB I-405 and SR-73 Off-Ramps to Fairview Road Closed for Approximately 100 Days

Crews closed the NB I-405 and SR-73 off-ramps to Fairview on April 5, 2021, for approximately 100 days to accommodate the freeway widening.

REMINDER! SB I-405 Off-Ramp to Bolsa Chica Road Closed for Approximately One Year

Crews closed the SB I-405 off-ramp to Bolsa Chica on Oct. 27, 2020 for approximately one year to advance construction on the Bolsa Chica bridge.

Construction Activities

Almond Avenue

COMING SOON! Demolition and reconstruction of the sound walls along Almond Avenue are anticipated to commence as early as May 2021. Crews will install a temporary sound barrier prior to demolition.

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

Beach Boulevard

REMINDER! Crews began construction of the traffic signal at the Beach/Center Avenue intersection on Feb. 8, and work is expected to continue through the end of April. This work requires intermittent lane reductions at the intersections of Beach between Stark Drive and Center.

Daytime work hours are 7 a.m. to 4 p.m. Nighttime work hours are 9 p.m. to 5 a.m. on weekdays and 9 p.m. to 8 a.m. on weekends.

REMINDER! Crews postponed falsework and overhang removal activities for the widened I-405 bridge over Beach Boulevard. This work required intermittent Beach closures between Center Avenue and northbound (NB) I-405 freeway ramps.

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

I-405 near Bolsa

REMINDER! Crews will continue working on the foundation of the wall along southbound (SB) I-405, south of Bolsa Ave.

  • Ongoing 7 a.m. to 4 p.m. on weekdays and Saturdays, for approximately three weeks.

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

Please be advised that this work may be loud.

Edwards Street

REMINDER! Crews will began working on the foundation of the retaining wall adjacent to Buckingham Park along the NB I-405 near Edwards bridge. The foundation consists of approximately 51 cast-in-drilled-hole (CIDH) piles.

As early as Wednesday, April 28, 7 a.m. to 4 p.m. on weekdays, for approximately one month.

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

Please be advised that this work may be loud.

Fairview Road

UPDATE! Crews are scheduled to continue working on the retaining wall along northbound (NB) Fairview Road, south of the on-ramp to southbound (SB) I-405 and SB SR-73. This work will also require NB and SB Fairview intermittent lane reductions between McCormack Lane and freeway ramps. Additional activities include strip and form work and concrete pours.

Crews are anticipated to resume concrete pours for the retaining wall along NB Fairview as early as 9 p.m. to 6 a.m.:

  • Tuesday, April 27

Nightly intermittent lane reductions are ongoing 10 p.m. to 5 a.m. and continue through the end of May on weeknights.

Retaining wall activities are ongoing 7 a.m. to 4 p.m. on weekdays.

Crews may mobilize equipment as early as 6 a.m. and some activity may occur at night from 9 p.m. to 6 a.m. as needed.

Concrete pours are anticipated in late March and early April.

Please be advised that this work may be loud.

Goldenwest Street

COMING SOON! Crews postponed pile driving activities for the Goldenwest bridge over I-405, along the center median and NB/SB I-405 at Goldenwest bridge.

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

Please be advised that this work may be loud.

Harbor Boulevard

REMINDER! Crews will continue installing piles for the foundation of a wall between Harbor and Fairview Road.

  • Ongoing 7 a.m. to 4 p.m. on weekdays, for approximately one month.

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

Please be advised that this work may be loud.

Heil Avenue

REMINDER! Crews continue construction activities for the Heil pedestrian bridge over I-405. Activities include excavation and shoring to continue forming the foundation of the bridge.

Following this work, crews will begin forming the footings and columns, as well as construct the falsework to form the spans over the freeway.

This work requires an extended closure of Heil between Ross Lane and Landau Lane.

The closure began on Wednesday, Dec. 30, and is expected to continue for approximately seven months.

Residential access will be maintained at all times.

McFadden Avenue

REMINDER! Crews began installing piles for the foundation of the sound wall adjacent to Sugar Drive and Shasta Lane. Preparation activities have begun and will continue for approximately one week.

  • Ongoing 7 a.m. to 4 p.m. on weekdays for approximately two weeks.

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

Please be advised that this work may be loud.

Magnolia Street

NEW! Crews will install k-rail and perform curb, gutter and sidewalk work along SB Magnolia between Sendero Apartments and Warner Avenue. This activity will require a SB Magnolia lane reduction to accommodate pedestrian access for approximately three weeks.

This work is anticipated to start as early as Monday, April 26 and will continue 9 p.m. to 6 a.m. on weeknights and Saturdays, as needed, for approximately three weeks.

Daytime work hours are 7 a.m. to 4 p.m.
Nighttime work hours are 9 p.m. to 6 a.m.
Crews may mobilize equipment as early as 6 a.m.

Please be advised that this work may be loud.

Milan Street

COMING SOON! Crews postponed working along Milan Street adjacent to southbound (SB) I-405, between approximately Stratford Avenue and Lowell Circle, as part of the freeway widening project.

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

Westminster Boulevard

REMINDER! Crews began working on the foundation of the retaining wall adjacent to Cascade Park along the southbound (SB) I-405 on-ramp from Westminster Boulevard. The foundation consists of approximately 80 cast-in-drilled-hole (CIDH) piles.

  • Ongoing 7 a.m. to 4 p.m. on weekdays, for approximately one month.

Crews may mobilize equipment as early as 6 a.m., and some activity may occur at night. Please note intermittent nighttime closures of the SB I-405 on-ramp from Westminster may be required.

Additional construction activities including rebar, form and concrete activities are anticipated in May/June and backfill and block wall installation is anticipated in July/August.

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

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.