featured graphic for I-405 Improvement Project after COVID-19. Logo courtesy of OCTA.

I-405 Improvement Project construction alert: Wednesday, January 26, 2022

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.

Si prefiere recibir información en español, por favor llame este numero 888-400-8994.

Nếu quý vị muốn nhận được thông tin này bằng tiếng Việt, xin vui lòng liên lạc với cô Lý Gia 888-662-6569.

To view and print a detailed list of closures and detours CLICK HERE!

Click to see closures and detours on the interactive map.

Upcoming Brookhurst Street Phase Two Bridge Construction

Crews will shift traffic to the new portion of the Brookhurst Street bridge over I-405 to begin the second phase of demolition and construction.

This work will require the southbound (SB) I-405 loop on-ramp from Brookhurst and the SB I-405 off-ramp to SB Brookhurst to be closed for approximately three days. This work will also require nightly bridge closures.

The northbound (NB) loop on-ramp from Brookhurst and the NB I-405 loop off-ramp to NB Brookhurst will remain closed during this time.

Activities will include removal of k-rail and concrete, as well as restriping lanes on the Brookhurst bridge and freeway ramps.

Partial demolition of the old portion of the bridge will occur over two weekends under full freeway closures and is anticipated for mid-to late February.

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

NEW! Southbound I-405 Brookhurst Street On- and Off-Ramps to be Closed for Three Days for Traffic Shift

The SB I-405 on- and off-ramps will be closed as early as 10 p.m. Friday, Feb. 4, to 5 a.m. Monday, Feb. 7, so that crews can shift traffic to the new portion of the Brookhurst Street bridge.

The Brookhurst bridge will be closed nightly between the freeway ramps, 10 p.m. to 5 a.m.:

  • Friday, Feb. 4;
  • Saturday, Feb. 5; and
  • Sunday, Feb. 6

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

NEW! Northbound I-405 Closures for Pavement Operations

Crews will close northbound (NB) I-405 between the NB I-405 off-ramp to Euclid Street and the NB I-405 on-ramp from Warner to conduct pavement operations.

The NB I-405 closures are scheduled for 11 p.m. to 5 a.m.:

  • Wednesday, Jan. 26;
  • Thursday, Jan. 27; and
  • Friday, Jan. 28.

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

UPDATE! Southbound I-405 Off-Ramp to Goldenwest Street/Westminster Mall Road to Close for Approximately Six Weeks

Crews will close the southbound (SB) I-405 off-ramp to Goldenwest Street/Westminster Mall Road for approximately six weeks to accommodate the freeway widening.

The ramp is scheduled to close 10 p.m. Monday, Jan. 31, and is anticipated to reopen after approximately six weeks.

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

REMINDER! Southbound I-405 On-Ramp from Seal Beach Boulevard to Close for Approximately One Month

Crews will close the southbound (SB) I-405 on-ramp from Seal Beach Boulevard for approximately one month to accommodate the freeway widening.

The ramp is scheduled to close 10 p.m. Wednesday, Feb. 2, and is anticipated to reopen after approximately one month.

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

REMINDER! Southbound Euclid Street Closures Continue

Crews will continue removing the brackets and scaffolding from the I-405 bridge over Euclid Street.

This work will require a full southbound (SB) Euclid closures between Mt. Washington Street and the SB freeway ramps.

The SB closures are scheduled for 10 p.m. to 5 a.m.:

  • Wednesday, Jan. 26;
  • Thursday, Jan. 27; and
  • Friday, Jan. 28.

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

REMINDER! Northbound (NB) I-405 Closure to Adjust Westminster Boulevard Falsework

Crews will adjust the falsework for the Westminster Boulevard bridge over I-405.

This work will require a NB I-405 closure between the NB I-405 off-ramp to Bolsa Avenue and the NB I-405 on-ramp from Westminster.

NB I-405 is set to close 11 p.m. Thursday, Jan. 27, to 5 a.m. Friday, Jan. 28.

REMINDER! Southbound (SB) I-405 Closure to Adjust Westminster Boulevard Falsework

Crews will adjust the falsework for the Westminster Boulevard bridge over I-405.

This work will require a SB I-405 closure between the SB I-405 off-ramp to Springdale Street and the SB I-405 on-ramp from Westminster.

SB I-405 is set to close 11 p.m. Friday, Jan. 28, to 5 a.m. Saturday, Jan. 29.

REMINDER! Northbound (NB) Brookhurst I-405 On- and Off-Ramps Closed for Approximately Two Months

Crews closed the NB I-405 off-ramp to Brookhurst Street and the NB I-405 loop on-ramp from NB Brookhurst to accommodate the freeway widening.

The ramps were closed on Monday, Jan. 3, and are anticipated to reopen after approximately two months.

REMINDER! Nightly Brookhurst Street Bridge and Ramp Closures for a Retaining Wall and Utility Work

Crews will close the Brookhurst Street bridge and ramps nightly, for retaining wall and utility work.

The nightly closures are anticipated to continue, 10 p.m. to 5 a.m. for approximately two more weeks, on weeknights and weekends, as needed.

REMINDER! Westbound (WB) SR-22 On-Ramp from Old Ranch Parkway Closure to Extend for Approximately Three Months

Crews closed the Old Ranch Parkway on-ramp to WB SR-22 on April 13. The ramp will be closed for an additional three months due to unforeseen site conditions, to address complexities with traffic staging, and to accommodate the freeway widening.

The ramp is anticipated to reopen in spring 2022.

This work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

Este trabajo puede ser ruidoso. El horario está sujeto a cambios debido a las inclemencias del tiempo o problemas operativos imprevistos.

Xin lưu ý là công việc này có thể gây nên những tiếng động ồn ào. Lịch trình có thể thay đổi vì thời tiết xấu hoặc những yếu tố công tác không thể dự đoán.

Construction Activities

Almond Avenue

REMINDER! Crews will continue working on the foundation of the sound wall along Almond Avenue, east of the park. The foundation consists of 71 cast-in-drilled-hole (CIDH) piles. This activity includes augering large holes, and installing forms and steel cages and pouring concrete into the holes to form the piles.

Following these activities, crews will begin working on the concrete safety barrier and the sound wall.

Ongoing, 7 a.m. to 4 p.m. on weekdays and Saturdays, as needed, for approximately two more weeks.

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

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

Bolsa Avenue

NEW! Crews are constructing the sound wall along southbound (SB) I-405, between the Bolsa Avenue bridge and the railroad.

Activities include soil backfill and compaction, placing concrete forms, and pouring concrete.

Construction is ongoing, 7 a.m. to 4 p.m. on weekdays and Saturdays, as needed for approximately one week.

This work will also include intermittent nighttime lane reductions on SB I-405, between Bolsa Avenue and McFadden Avenue.

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

Please be advised that this work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

Beach Boulevard

REMINDER! Crews are constructing curb and gutter along northbound (NB) Beach Boulevard. This work requires NB Beach to be reduced to two lanes between Center Avenue and the NB I-405 off-ramp to NB Beach.

The lane reductions will be in place continuously through
9 p.m. Friday, Jan. 28.

Please be advised that this work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

Newland Street

UPDATE! Crews will begin installing piles for the foundation of the Newland Street bridge over I-405. The foundation of the outside abutments consists of 76 steel piles.

The pile installation for the outside abutments is anticipated to begin as early as 7 a.m. to 4 p.m. Tuesday, Feb. 1, for approximately one month, on weekdays and Saturdays as needed.

Crews will begin installing piles for the center bents later this year.

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

Please be advised that this work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

Harbor Boulevard

NEW! Crews will remove brackets from the I-405 bridge over Harbor Boulevard and remove utilities from northbound Harbor.

This work will require intermittent lane reductions on northbound and southbound Harbor, between Gisler Avenue and South Coast Drive.

Bracket removal is scheduled for 11 p.m. to 6 a.m. Friday, Jan. 28, and again on Friday, Feb. 4.

Utility removal is scheduled for 10 p.m. to 5 a.m. Monday, Jan. 31, and again on Friday, Feb. 4.

Please be advised that this work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

I-405/SR-73 HOV Connector

REMINDER! Crews are working on the foundation of the southbound (SB) I-405/SR-73 HOV connector bridge. The foundation consists of 8 cast-in-drilled hole (CIDH) and 35 steel pipe piles.

The CIDH activity includes installing large-diameter casings approximately 200 feet into the ground.

The steel pipe piles will be driven into the soil until reaching a hard layer of earth beneath the structure foundation.

Pile installation activities are ongoing and will continue 7 a.m. to 4 p.m. on weekdays and weekends, as needed, through Spring 2022.

Daytime and nighttime lane reductions on SB I-405, between
SR-73 and Bear Street are anticipated to support the work.

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

Please be advised that this work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

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.