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I-405 Improvement Project construction alert: Week of May 3

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.

NEW! Full Ellis Avenue and Euclid Street Closure for Drainage Work

Crews will install a new drainage system across Ellis. This work will require nightly full closures of Ellis between the Southbound (SB) I-405 freeway ramps and Pacific Street.

Once crews complete the work on Ellis they will switch over to Euclid to install a new drainage system across Euclid. This work will require nightly full closures of Euclid between the freeway ramps and Mount Washington Street.

Note: SB freeway ramps will remain open.

The Ellis nightly street closures are set for 10 p.m. to 5 a.m. Monday, May 10, to Friday, May 14.

The Euclid nightly street closures are set for 10 p.m. to 5 a.m. Monday, May 17, to Friday, May 21.

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

NEW! SB I-405 Loop On-Ramp from Magnolia Street to Close for Approximately Three Months

Crews will close the southbound (SB) I-405 loop on-ramp from Magnolia Street for approximately three months to accommodate the freeway widening.

Activities include removal of the existing ramp, excavation, placement and compaction of base material, rebar and concrete work, paving, drainage installation, electrical work and striping.

The SB I-405 loop on-ramp from Magnolia is anticipated to close as early 10 p.m. Tuesday, May 11.

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

REMINDER! Full Magnolia Street Bridge Closures for Paving Work

Crews will continue performing pavement work for the approaches to the Magnolia bridge. This work will require full closures of Magnolia between the freeway ramps.

The closure is set to continue 9 p.m. Wednesday, May 5, to 5 a.m. Thursday, May 6.

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

REMINDER! Northbound (NB) I-405 On-Ramp from Westminster Boulevard to Close for Approximately Seven Weeks

Crews will close the NB I-405 on-ramp from Westminster Boulevard for approximately seven weeks to accommodate the freeway widening.

Activities include removal of the existing ramp, excavation, placement and compaction of base material, rebar and concrete work, paving, drainage installation, electrical work and striping.

The NB I-405 on-ramp from Westminster is anticipated to close as early 10 p.m. Tuesday, May 11.

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

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

The NB I-405 freeway nightly closures are set to continue 10 p.m. to 5:30 a.m. Wednesday, May 4, to Thursday, May 13, on weeknights.

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 intermittent lane reductions on Magnolia between Warner Avenue and Heil Avenue.

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. through the end of May.

REMINDER! Partial Southbound (SB) I-405 Freeway Lane Reductions for Concrete Work

Crews will pour concrete for the Magnolia bridge over the I-405. This work will require partial lane reductions of the SB I-405.

The partial SB I-405 lane reductions are set to continue 9 p.m. to 6 a.m., through Friday, May 7.

REMINDER! Partial Lane Closures on Talbert Avenue Bridge for Paving Work

Crews will perform paving work for the Talbert Avenue center median. This work will require inside lane reductions on both sides of Talbert between Brookhurst Street and Cashew Street.

The Talbert lane closures are set for 9 a.m. to 3 p.m., Thursday, May 6, and Friday, May 7.

COMING SOON! Full Closure of the Warner Avenue Bridge and Bridge Demolition

Crews anticipate closing the Warner Avenue bridge for reconstruction later this month. Complete demolition of the bridge is anticipated to occur after the bridge closure.

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

NEW! Partial I-405 Freeway Lane Reductions for Striping Work for Heil Pedestrian Bridge Reconstruction

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

The partial I-405 lane reductions are set for 9 p.m. Tuesday, May 11, to 6 a.m. Wednesday, May 12.

Additional closures of the I-405 are anticipated for falsework installation on the Heil pedestrian bridge in late May.

NEW! 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, May 24, for approximately one month.

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

UPDATE! 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 for Monday, May 10, 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! 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! NB I-405 Loop Off-Ramp to Bolsa Avenue Closed Intermittently for Approximately One Week

Crews are closing the NB I-405 loop off-ramp to Bolsa intermittently for approximately one week 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! 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.

Brookhurst Street

REMINDER! Crews are set 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 southbound (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.

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.

  • Ongoing 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.:

  • Wednesday, May 5
  • Tuesday, May 11

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.

Please be advised that this work may be loud.

Goldenwest Street

UPDATE! Continuation of pile driving for the Goldenwest bridge over I-405. 226 piles will be used.

This work will begin as early as Monday, May 10, 7 a.m. to 4 p.m. and continue on weekdays for approximately six weeks.

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.

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 seven 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.

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

McFadden Avenue

UPDATE! Crews will begin installing piles for the I-405 bridge over the railroad between McFadden Avenue and Bolsa Avenue.

This work will begin as early as Monday, May 10, 7 a.m. to 4 p.m. and continue on weekdays for approximately six weeks

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

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 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.