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I-405 Improvement Project construction alert: Week of May 24

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.

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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.

UPDATE! Full Closure of the Warner Avenue Bridge and Bridge Demolition

Crews will close the Warner Avenue bridge in anticipation of demolition to accommodate the freeway widening as early as 10 p.m. Tuesday, June 1.

Construction of the new bridge is anticipated to take approximately 23 months. The bridge will be demolished over three Saturday nights, under full freeway closures.

Demolition is anticipated June 5, June 12, and June 19*.

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

Crews will close the I-405 off-ramps to Warner for temporary ramp construction. Ramps closures are set for 10 p.m. Tuesday, June 1, to 5 a.m. Friday, June 4.

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

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

NEW! Magnolia Street Bridge Closure for Joint Seal Work

Crews will install the joint seal for the Magnolia Street bridge over the I-405. This work will require full closures of Magnolia between the freeway ramps.

The closures are set for 9:30 p.m. to 6 a.m., Wednesday, May 26, and again on Thursday, May 27.

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

NEW! Full Southbound (SB) and Northbound (NB) I-405 Freeway Closures for Bolsa Chica Road Girder Installation

Crews will install pre-cast concrete girders for the Bolsa Chica Road bridge over I-405. The girders are the main horizontal support beams, known as the superstructure, the abutments and center columns.

This work will require SB and NB full freeway, lane and ramp closures.

Night One

  • SB freeway closure is set for as early as 10:30 p.m. Friday, June 4, to 7:30 a.m. Saturday, June 5

Night Two

  • NB freeway closure is set for as early as 11 p.m. Saturday, June 5, to 8 a.m. Sunday, June 6

*If this activity has not been completed, during the timeframes above, work is anticipated to continue on Monday, June 7 from 11 p.m. to 5:30 a.m.

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

NEW! I-405 Freeway Closures for Edinger Avenue Bridge Falsework Activities

Crews will be making adjustments to the falsework for the Edinger bridge over I-405. This work will require SB and NB freeway I-405 closures.

SB I-405 freeway closure is set for 11 p.m. Tuesday, June 1, to 5:30 a.m. Wednesday, June 2.

NB I-405 freeway closure is set for 11 p.m. Wednesday, June 2, to 5:30 a.m. Thursday, June 3.

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

COMING SOON! Euclid Street Closures for Waterline Installation Work

Crews will continue installing a new drainage system across Euclid next week. This work will require Euclid closures between the freeway ramps and Mount Washington Street.

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

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

COMING SOON!Eastbound (EB) Lane Reductions for McFadden Avenue Bridge Monument Work

Crews will continue constructing the McFadden bridge monument over I-405. This work will require EB lane reductions on McFadden between Pacific Street and Gothard Street.

Lane reductions are anticipated to begin as early as Tuesday, June 1 on weekdays and weeknights, for approximately two weeks. Daytime works hours are anticipated 7 a.m. to 3 p.m. and nighttime work hours are anticipated 8 p.m. to 5 a.m.

COMING SOON! SB I-405 Off-Ramp to Magnolia Street to Close for Approximately 36 Days

Crews will close the SB I-405 off-ramp to Magnolia for approximately 36 days to accommodate the freeway widening in early June.

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

UPDATE! Partial I-405 Freeway Lane Reductions for Excavation Work for Goldenwest Street Bridge

Crews will perform excavation work and pile installation in the center median of the Goldenwest Street bridge over the I-405. This work will require partial lane reductions of the I-405 freeway between Bolsa Avenue and Goldenwest.

The partial I-405 lane closures are set for 5a.m. to 12 p.m., Monday, June 7, for approximately one month.

COMING SOON! NB I-405 Loop Off-Ramp to Bolsa Avenue to Close for Approximately Three Months

Crews will close the NB I-405 loop off-ramp to Bolsa for approximately three months to accommodate the freeway widening in mid-June.

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

COMING SOON! Full I-405 Freeway & Partial Closures for Heil Avenue Pedestrian Bridge for Falsework Installation Activities

Crews will perform striping work and install k-rail to begin falsework installation for the new Heil pedestrian bridge over the I-405 next week. This work will require partial lane reductions of the I-405 between Magnolia Street and Newland Street.

Additionally, crews will begin falsework installation for the Heil pedestrian bridge over the I-405. This work requires full NB and SB I-405 closures in June.

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

REMINDER! Intermittent Lane Reductions on Magnolia Street Bridge for Civil Work

Crews are performing civil work on the Magnolia bridge over I-405. This work requires daytime and nighttime intermittent lane reductions on Magnolia between Warner Avenue and Heil Avenue.

The remaining activities include electrical, sidewalk, curb, and drainage work, as well as traffic signal work.

The intermittent lane reductions are set to continue 9 a.m. to 4 p.m. and 9 p.m. to 6 a.m. through Tuesday, June 1.

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

Crews anticipate continuing traffic signal and pedestrian ramp construction work at the intersection of Seal Beach Boulevard and Lampson Avenue.

This work will require lane reductions of Seal Beach Blvd. between Old Ranch Parkway and St. Cloud Drive. Additional closures at the Seal Beach Blvd. and Lampson intersections are anticipated.

Work is anticipated to continue, for approximately five weeks on weekdays and weeknights.

  • Daytime work hours are 7:30 a.m. to 4:30 p.m.
  • Nighttime work hours are 10 p.m. to 5 a.m.

REMINDER! NB I-405 On-Ramp from Westminster Boulevard Closed for Approximately Seven Weeks

Crews closed the NB I-405 on-ramp from Westminster on May 11 for approximately seven weeks to accommodate the freeway widening.

REMINDER! SB I-405 Loop On-Ramp from Magnolia Street Closed for Approximately Three Months

Crews closed the SB I-405 loop on-ramp from Magnolia on May 11 for approximately three months to accommodate the freeway widening.

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 June 2021. Crews will install a temporary sound barrier prior to demolition.

Crews are scheduled to demolish a segment of the sound wall along Almond Avenue between Dahlia Circle and Jasmin Circle adjacent to the NB I-405.

A new wall and new drainage channel will be constructed as part of the freeway widening. A temporary fence and sound blankets will be placed during reconstruction of the sound wall.

This work is set to begin as early as Thursday, June 3, from 7 a.m. to 4 p.m. for approximately one month on weekdays and Saturdays as needed.

Crews may mobilize equipment as early as 6 a.m., and some nighttime activity may occur from 9 p.m. to 6 a.m.

Please be advised that this work may be loud.

Brookhurst Street

REMINDER! Crews will continue to work on the foundation of a wall along the NB I-405 off-ramp to Brookhurst Street.

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

I-405 near Bolsa

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

  • Ongoing 7 a.m. to 4 p.m. on weekdays and Saturdays, for several 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.

Bolsa Chica Road

REMINDER! Crews are scheduled to remove the overhead sign foundation near the retaining wall along southbound (SB) I-405 just west of Old Bolsa Chica Road.

Construction activities include concrete removal and hauling of the former sign foundation. This activity will be performed behind K-rail.

Sign foundation removal is anticipated to begin as early as Wednesday, May 26.

Daytime work hours are scheduled for 7 a.m. to 4 p.m.

Nighttime work hours are scheduled for 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.

Edwards Street

REMINDER! Crews 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.

  • Ongoing 7 a.m. to 4 p.m. on weekdays, approximately through the end of May.

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

REMINDER! Crews are continuing work on the retaining wall along SB Fairview between South Coast Drive and the NB I-405 on-ramp to accommodate the freeway widening.

Activities include removal of portions of the wall and footing, excavation and backfill.

This work is set to begin as early as Tuesday, June 1, through Thursday, June 3.

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

This work will require intermittent lane reductions on Fairview between South Coast and McCormack Lane.

Please be advised that this work may be loud

Goldenwest Street

REMINDER! Continuation of pile driving for the Goldenwest bridge over I-405.

  • Ongoing 7 a.m. to 4 p.m. through the end of the week.

Please be advised that this work may be loud.

Harbor Boulevard

REMINDER! Crews will continue installing piles for the foundation of a wall along SB I-405 between Harbor and Fairview Road.

  • 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 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.

Crews are forming the footings and columns, and will begin to construct the falsework soon 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 eight months.

Residential access will be maintained at all times.

Milan Street

COMING SOON! Sidewalk, curb and gutter work along Milan between approximately Stratford Avenue and Lowell Circle has been postponed to June.

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

SR-73 Connector

REMINDER! Crews are scheduled to work on the foundation of a retaining wall along the SB I-405 connector to SB SR-73. The foundation consists of 9 CIDH piles. This activity includes augering large holes, and installing forms and steel cages, and pouring concrete into the holes to form the piles.

The work is anticipated to begin as early as Wednesday, June 2, and continue through Friday, June 4. Work hours are scheduled for 7 a.m. to 4 p.m. Crews may mobilize as early as 6 a.m.

REMINDER! Crews will continue work on new retaining walls along the SB I-405 connector to SB SR-73 to accommodate the freeway widening. Activities include removal of existing retaining walls, excavation, and shoring installation.

Daytime work hours will be from 7 a.m. to 4 p.m., with crews mobilizing as early as 6 a.m. Nighttime work hours will be from 9 p.m. to 6 a.m.

This work is anticipated to continue on weekdays and Saturdays for approximately three weeks. Nighttime work is anticipated to occur throughout this duration, as needed.

Please be advised that this work may be loud.

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 week.

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 are 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.