featured graphic for I-405 Improvement Project

I-405 Improvement Project construction alert: Week of February 22

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.

REMINDER! Fairview Road Bridge Partial Demolition

Crews shifted traffic to the new side of the Fairview bridge over I-405 on Friday, Feb. 12, in anticipation of partial demolition.

Demolition activities have begun and the second half of the bridge will continue to be demolished over two more nights, under full freeway closures. Additional nighttime demolition will occur for several weeks under freeway lane closures. Some daytime demolition also is anticipated.

Night Two

  • NB full closure from 10 p.m. Saturday, Feb. 27, to 8:30 a.m. Sunday, Feb. 28
  • NB lane reduction from 8:30 a.m. to 9:30 a.m. Sunday, Feb. 28
  • SB full closure from 10 p.m. Saturday, Feb. 27, to 9 a.m. Sunday, Feb. 28

UPDATE! A third night was added to complete the demolition activity.

Night Three

  • NB full closure from 10 p.m. Friday, March 5, to 7 a.m. Saturday, March, 6
  • HOV and left lanes will reopen to traffic from 7 to 8 a.m. Saturday, March 6
  • Fairview Road closure from 10 p.m. Friday, March 5, to 8 a.m. Saturday, March, 6
  • NB lane reduction from 8:30 to 9:30 a.m. Saturday, March 6

Fairview between McCormack Lane and South Coast Drive also will be closed for this work.

However, residential access will be maintained.

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

UPDATE! Full Bridge Closures of McFadden Bridge for Joint Seal Work

Crews will install the joint seal for the McFadden Avenue bridge over
I-405. This work will require full McFadden bridge closures between Sugar Drive and Huntington Village Lane.

Bridge closures are anticipated to begin as early as 10 p.m. Thursday, March 4 to 5 a.m. Friday, March 5, and again Friday, March 5, if needed.

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

UPDATE! Full Northbound (NB) and Southbound (SB) Freeway Closures for Bolsa Avenue Bridge Falsework Removal

Crews will begin to remove the falsework for the Bolsa Avenue bridge I-405. This work will require full SB and NB freeway closures.

NB I-405 nightly closures are anticipated to begin as early as 10 p.m. to 5:30 a.m. Monday through Thursday and 10 p.m. to 6 a.m. on Friday:

  • Monday, March 1, and continue nightly through Tuesday, March 9* on weekdays

SB I-405 nightly closures are anticipated to begin as early as 10 p.m. to 5:30 a.m. Monday through Thursday and 10 p.m. to 6 a.m. on Friday:

  • Tuesday, March 9*, and continue nightly through Friday, March 19 on weekdays

*Only one direction is planned to be closed on March 9. If NB work has not been completed, it will be closed. Otherwise, SB will be closed. The 405 Community Outreach Team will continue to provide detailed schedule information in future alerts.

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

UPDATE! Full Southbound (SB) and Northbound (NB) I-405 Freeway Closures for Magnolia Falsework Activities

Crews will lower the falsework for the widened Magnolia bridge over I-405. This work will require full closures of SB and NB I-405 freeway between Magnolia and Brookhurst Street.

SB I-405 nightly closures are anticipated to begin as early as 10 p.m. to 5:30 a.m.:

  • Wednesday, Feb. 24

NB I-405 nightly closures are anticipated to begin as early as 10 p.m. to5:30 a.m.:

  • Thursday, Feb. 25; and
  • Friday, Feb. 26

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

NEW! Full Southbound (SB) Euclid Street Closure for Concrete Work

Crews will begin concrete work for the I-405 widen bridge over Euclid. This work will require full SB closure of Euclid between Mount Washington Street and freeway ramps.

SB Euclid closures are anticipated to begin as early as 10 p.m. to 5 a.m.:

  • Monday, March 1; and
  • Tuesday, March 2

Street Detours are: Talbert Avenue → Ward Street → Ellis Avenue

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

REMINDER! Full Southbound (SB) and Northbound (NB) Freeway Closures for Edwards Street Falsework Installation

Crews will continue constructing falsework for the Edwards Street bridge over I-405. This work requires full freeway closures of NB and SB I-405 between Bolsa Avenue and Westminster Boulevard.

The NB freeway closures are anticipated for 10 p.m. to 5 a.m.:

  • Wednesday, Feb. 24; and
  • Thursday, Feb. 25

REMINDER! Full Harbor Boulevard Closures for Falsework Removal

Crews will continue removing the falsework for the widened I-405 bridge over Harbor. This work requires full closures of SB and NB Harbor between the I-405 ramps.

Harbor closures are anticipated to continue as early as 10 p.m. to 5 a.m.:

  • Wednesday, Feb. 24, and continue nightly through Thursday, March 4, on weekdays.

REMINDER! Southbound (SB) I-405 Median Demolition between Goldenwest Street and Bolsa Avenue

Crews will resume demolishing the median along southbound (SB) I-405 and the SB off-ramp to Bolsa to accommodate the freeway widening.

The demolition is set to continue as early as Monday, March 1, and continue nightly through Wednesday, March 3.

  • Daytime hours: 7 a.m. to 4 p.m.
  • Nighttime hours: 9 p.m. to 6 a.m.

Crews may mobilize equipment as early as 6 a.m.

Please note, that nighttime lane reductions on I-405 may be required between Goldenwest and Bolsa from 10 p.m. to 5 p.m.

COMING SOON! Eastbound (EB)SR-22 Connector to Northbound (NB) I-605/I-405 to Close for Approximately 55-Hours

Crews will close the EB SR-22 connector to NB I-605/I-405 in early March for approximately 55-hours to accommodate the freeway widening.

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

COMING SOON! Partial Fairview Road Closures for Retaining Wall Activities

Crews anticipate reducing Fairview Road to one lane in each direction between McCormack Lane and South Coast Drive to accommodate construction activities for the retaining wall along northbound (NB) Fairview.

Fairview closures are anticipated to begin in early March.

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

COMING SOON! Southbound (SB) I-405 On-Ramp from Beach Boulevard/Center Avenue to Close for Approximately Two Months

Crews will close the SB I-405 on-ramp from Beach/Center in early March for approximately two months to accommodate the freeway widening.

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

COMING SOON! Northbound (NB) I-405 Off-Ramp to Fairview Road/Harbor Boulevard/Susan Street to Close for Approximately 100 Days

Crews will close the NB I-405 off-ramp to Fairview/Harbor/Susan in early April for approximately 100 days to accommodate the freeway widening.

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

REMINDER! Bolsa Avenue Full Closure for Concrete Work

Crews will continue concrete work for a retaining wall along eastbound (EB) Bolsa Avenue. This work requires full closures of Bolsa between Goldenwest Street and Chestnut Street.

Nightly closures are set to continue Wednesday at 9 p.m. to 5 a.m. on weeknights, for approximately two weeks.

A detour will be in place for pedestrians and bicyclists to navigate around the closure.

REMINDER! Nightly Southbound (SB) I-405 Freeway Closures 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! Nightly Consecutive Ramp Closures Scheduled for Approximately Six Months

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

  • Southbound (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

REMIDNER! Northbound (NB) I-405 On-Ramp from South Coast Drive/Hyland Avenue Closed for Approximately Two Months

Crews closed the NB I-405 on-ramp from South Coast Drive/Hyland Avenue to accommodate the freeway widening and scheduled to reopen Saturday, Feb. 27.

UPDATE!

SCE crews will turn on the the southbound off-ramp to Harbor Boulevard traffic signal on flash for up to two-hours between 9 a.m. and 3 p.m. Friday, Feb. 26.

REMINDER! Southbound (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 Road on Oct. 27, 2020 for approximately one year to advance construction on the Bolsa Chica bridge.

Construction Activities

Harbor Boulevard

REMINDER! Crews began installing piles for the foundation of a wall adjacent to the southbound (SB) I-405 on-ramp from Harbor.

  • Ongoing 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 activity may occur at night.

Please be advised that this work may be loud.

Santa Ana River Crossing

REMINDER! Crews will continue to work on the foundation of the retaining wall adjacent to Mt. Baldy Circle along northbound (NB) I-405 between Santa Ana River and the Euclid Street off-ramp.

  • 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.

Talbert Avenue

REMINDER! Crews will continue construction of the Talbert Avenue bridge over the I-405. This work will require intermittent lane reductions at the intersection of Talbert and Ward Avenue and at Talbert and Brookhurst Street. Ongoing activities include traffic signal construction.

  • Ongoing 9 p.m. to 5 a.m. on weekdays, until Talbert bridge opening.

Note: additional lane redactions are anticipated in early March for waterline installation.

Please be advised that this work may be loud.

San Rafael Street

REMINDER! Crews will continue working on the foundation of the retaining wall adjacent to San Rafael Street along northbound (NB) I-405 between Talbert Avenue and Brookhurst Street.

  • 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 will continue installing piles for the foundation of the Heil Avenue pedestrian bridge over I-405.

  • 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 activities may occur at night.

Please be advised that this work may be loud.

REMINDER! Crews continue construction activities for the Heil pedestrian bridge over I-405. Activities include excavation, shoring, and pile driving 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.

Beach Boulevard

REMINDER! Crews began construction of the traffic signal at the Beach/Edinger Avenue and Beach/Center Avenue intersections on Feb. 8, for approximately two months. 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.

McFadden Avenue

COMING SOON! Crews will begin installing piles for the foundation of a retaining wall along the southbound (SB)
I-405 adjacent to College Park in Spring 2021.

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

Vermont Street

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.

Goldenwest Street

UPDATE! Crews resumed work on the installation of piles for the foundation of Goldenwest bridge over I-405 along northbound and southbound I-405, adjacent to Goldenwest.

  • 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.

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 two months.

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.

REMINDER! Crews began installing piles for the foundation of a new retaining wall along the northbound (NB) Westminster on-ramp adjacent to Milton Avenue.

  • 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 activities may occur at night.

Please be advised that this work may be loud.

Milan Street

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

Construction activities will include removing k-rail, as well as sidewalk, curb, and gutter construction, and street restoration.

Beginning as early as Monday, March 1, 7 a.m. to 4 p.m. for approximately two months on weekdays.

Crews may mobilize equipment as early as 6 a.m.

Please be advised that this work may be loud.

Bolsa Chica Road

REMINDER! Continuation of pile driving for the Bolsa Chica bridge over I-405 along the center median and SB I-405 at Bolsa Chica bridge.

  • Ongoing 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 from 9 p.m. to 5 a.m. as needed.

Almond Avenue

REMINDER! Crews have begun relocating the fire hydrants along Almond Avenue to make room in the street for the sound wall activities. This work requires lane closures on Almond Avenue between Daisy Street and Pansy Circle. Access to all streets and driveways will always be maintained and the crew will include flaggers to assist with traffic control.

What’s Next?
Demolition and reconstruction of the sound walls along Almond Avenue are anticipated to commence after the fire hydrant activities are complete and as early as March 2021. Crews will install a temporary sound barrier prior to demolition.

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.