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

I-405 Improvement Project construction alert: Week of Sept. 6

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 Bridge Construction: Springdale Street

The Springdale Street bridge is anticipated to close in late September after the Edwards Street bridge reopens. Demolition activities are anticipated in early October.

The Edwards bridge is anticipated to reopen in late September.

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.

REMINDER! Northbound (NB) I-405 Off-Ramp to Euclid Street to Close Wednesday, September 8 for Approximately One Month

Crews will close the NB I-405 off-ramp to Euclid Street for approximately one month 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 ramp is set to close on 10 p.m. Wednesday, Sept. 8,for approximately one month.

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

NEW! Southbound (SB) I-405 Closures for Goldenwest Street Bridge Falsework Installation

Crews will begin installing the falsework for the Goldenwest Street bridge over I-405. This work will require SB I-405 closures between Goldenwest and Bolsa Avenue.

SB I-405 will be closed nightly 11 p.m. to 5 a.m. Monday, Sept. 13, to Friday, Sept. 20.

The 405 Community Outreach Team will provide an update when NB I-405 closures are scheduled.

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

UPDATE! Southbound (SB) I-405 Loop On-Ramp from Euclid Street NOW OPEN TO TRAFFIC!

Southbound (SB) I-405 Loop On-Ramp from Euclid Street NOW OPEN TO TRAFFIC!

REMINDER! Southbound (SB) Euclid Street Closures for Waterline Installation Continue

SB Euclid will be closed between Mount Washington and the freeway ramps 10 p.m. to 5 a.m. through Friday, Sept. 10, so crews can continue utility work.

REMINDER! Northbound (NB) I-405 Closures for Edinger Avenue Bridge Falsework Removal

Crews are removing the falsework from the Edinger Avenue bridge over I-405.

NB I-405 will be closed between Magnolia Street and Edinger 11 p.m. to 5 a.m.:

  • Thursday, Sept. 9; and
  • Monday, Sept. 13.

REMINDER! Northbound (NB) I-405 Loop Off-Ramp to Bolsa Avenue Closed

Crews closed the NB I-405 loop off-ramp to Bolsa on June 18, for approximately three months to accommodate the freeway widening.

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

Crews closed the Old Ranch Parkway on-ramp to the WB SR-22 on April 13, forapproximately five more 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! Sidewalk Closures on Seal Beach Boulevard for Signal Work

Crews closed the sidewalks at the intersection of Seal Beach Boulevard and Lampson Avenue for permanent traffic signal construction.

Activities include the removal of existing sidewalk ramps, installation of new sidewalk ramps, electrical and foundation work.

Permanent traffic signal construction will continue through September.

Daytime work hours are 9 a.m. to 3 p.m.

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

REMINDER! SB I-405 Off-Ramp to Bolsa Chica Road Closed

Crews closed the SB I-405 off-ramp to Bolsa Chica on Oct. 27, 2020. The ramp will be closed for approximately three more months to advance construction on the Bolsa Chica bridge.

REMINDER! Southbound (SB) I-405 Loop Off-Ramp to Westminster Boulevard Closed

The closure of the SB I-405 loop off-ramp to eastbound Westminster Boulevard has been extended for an additional two months to allow crews to complete bridge construction that was delayed due to nesting owls.

The new ramp is now set to open in late October.

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 are working on the foundation of a wall along Almond Avenue between Dahlia Circle and
Jasmin Circle, adjacent to NB I-405. The foundation consists of approximately 250 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 placing rebar, constructing forms and pouring concrete to
construct the wall.

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

Nighttime activities may also occur between 9 p.m. to 6 a.m.

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.

Bushard Street

UPDATE! Crews are installing piles for the wall adjacent to the Bushard Street bridge over I-405, near Poplar Street.

Pile installation activities are set to continue 7 a.m. to 4 p.m., through Friday, Sept. 10.

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 working to complete the wall construction along NB Fairview Road. This work will require lane reductions on NB Fairview.

Activities include placing concrete for the curb and gutter, installing the foundation for a traffic signal, and placing concrete for the new sidewalk.

NB Fairview will be reduced to one lane between the freeway ramps nightly 10 p.m. to 5 a.m. through Tuesday, Sept. 14, on weeknights.

Please be advised that this work may be loud.

Magnolia Street

COMING SOON! Crews will perform maintenance work on Magnolia Street. This work will require Magnolia closures.

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

Warner Avenue

UPDATE! Crews will continue installing piles for the Warner Avenue bridge over I-405, in the center median and adjacent to NB/SB I-405 at Warner bridge; and a nearby retaining wall along westbound Warner.

Ongoing 7 a.m. to 4 p.m. and continuing on weekdays and Saturdays as needed 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.

Westminster Boulevard

REMINDER! Crews will continue installing piles for the foundation from the center median of the Westminster Boulevard bridge.

Ongoing 7 a.m. to 4 p.m., for approximately two more weeks. Nighttime activities may also occur between 9 p.m. to 6 a.m.

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.

I-405/SR-73 HOV Connector

COMING SOON! Crews will begin installing the foundation of the widened I-405/SR-73 HOV connector. This work will require lane reductions on SB I-405.

Foundation work is anticipated to begin as early as Monday, Sept. 13, and continue through Spring 2022.

Please be advised that this work may be loud.

I-605

COMING SOON! Crews will install k-rail on the I-605 between Katella Avenue and the I-405 to perform overhead sign installation and center median and drainage activities.

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.