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

I-405 Improvement Project construction alert: Week of August 23

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.

REMINDER! SB Euclid Street Closures for Waterline Installation Continue

Crews will continue to install a waterline system across Euclid. This work will require SB Euclid closures and NB Euclid will be reduced to one lane between Mount Washington and the freeway ramps.

Nightly SB Euclid closures and NB Euclid lane reductions are set 10 p.m. to 5 a.m. through Tuesday, Aug. 31, on weeknights.

Please be advised that this work may be loud.

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

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

Crews are removing the falsework from the Edinger bridge over I-405. This work will require SB and NB I-405 closures.

Nightly SB I-405 closures between McFadden Avenue and Edinger are set to continue 11 p.m. to 5 a.m., through Thursday, Aug. 26.

Nightly NB I-405 closures between Magnolia Street and Edinger are set for 11 p.m. to 5 a.m., Monday, Aug. 30, through Thursday, Sept. 2

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

REMINDER! NB and SB I-405 Lane Reductions for Center Median Work

Crews will continue to perform work in the center median on the I-405 at the Bolsa Avenue bridge. This work will require NB and SB I-405 HOV lane reductions between Bolsa Avenue and Goldenwest.

The lane reductions are set to continue 5 a.m. to 12 p.m., for approximately three months.

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

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 for Approximately 8 Months

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 began Tuesday, June 1, and will continue through the end of the week.

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 for Approximately One Year

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

REMINDER! SB I-405 Loop On-Ramp from Euclid Street to Close for Approximately One Month

Crews closed the SB I-405 loop on-ramp from Euclid Street on Aug. 2, for approximately three weeks to accommodate the freeway widening.

COMING SOON! Bolsa Chica Road Traffic Signal Work

Crews will begin support activities in anticipation of sound wall construction mid-to-late August. This work includes relocating the temporary concrete barriers and fencing along NB Bolsa Chica.

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

COMING SOON! NB I-405 Off-Ramp to Euclid Street to Close for Approximately One Month

Crews will close the NB I-405 off-ramp to Euclid in early September for approximately one month.

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

COMING SOON! Magnolia Street Maintenance Work

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.

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 Activites

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.

South Coast Drive/Fairview Road

NEW! Crews will install the permanent overhead signs along the NB I-405 off-ramp to South Coast Drive and the NB I-405 off-ramp to Fairview Road.

This work will require nightly closures of the NB I-405 off-ramp to South Coast/ Fairview/ Susan Street/Harbor Boulevard.

The ramp closure is set for 9 p.m. to 6 a.m., TONIGHT, Wednesday, Aug. 25, and again on Thursday, Aug. 26.

Brookhurst Street

UPDATE! Crews will pour concrete for the Brookhurst bridge over I-405.

Nighttime concrete work is set for 10 p.m. Tuesday, Aug. 31, to 6 a.m. Wednesday, Sept. 1.

Please be advised that this work may be loud.

Warner Avenue

UPDATE! Crews will begin 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.

Pile installation activities are set for Thursday, Aug. 26, from 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 install piles for the foundation from the center median of the Westminster Boulevard bridge.

Pile installation activities are set for 7 a.m. to 4 p.m., for approximately two 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-605

COMING SOON! Crews will install k-rail on the I-605 between Katella Avenue and the I-405 to perform overhead 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.