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

I-405 Improvement Project construction alert: Week of August 2

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! Fairview Road False Deck and Overhang Installation

Crews are installing wooden and concrete forms, as well as work platforms to continue construction of the Fairview Road bridge over I-405.

This work requires bridge, freeway, and ramp closures.

Fairview will be closed between McCormack Lane and South Coast Drive, and the SB ramps and SB I-405 will be closed between Fairview and SR-73 11 p.m. to 5 a.m.:

  • Wednesday, Aug. 4;
  • Thursday, Aug. 5; and
  • Friday, Aug. 6.

Additionally, NB I-405 lane reductions between SR-73 and Harbor Boulevard are anticipated to begin Monday, Aug. 9, 9 p.m. to 6 a.m.for approximately one week.

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

REMINDER! Edwards Street Bridge Falsework Removal

Crews are removing the falsework from the Edwards bridge over I-405. This work requires SB I-405 closures.

The SB I-405 closures will continue 11 p.m. to 5 a.m.:

  • Wednesday, Aug. 4; and
  • Thursday, Aug. 5.

Closures may continue the week of August 9. The 405 Community Outreach Team will provide detailed schedule information in future alerts.

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

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.

COMING SOON! NB Euclid Street Closures for Maintenance Work

Crews will perform maintenance work on Euclid Street. This work will require NB Euclid Street closures.

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

COMING SOON! SB I-405 Loop On-Ramp from Magnolia Street to Reopen

Crews are set to reopen the SB I-405 loop on-ramp from Magnolia by Thursday, Aug. 5. The ramp was closed to accommodate the freeway widening.

REMINDER! I-405 Lane Reductions for Goldenwest Street Bridge Continue

Crews will continue excavating and installing piles for the center median of the Goldenwest Street bridge over the I-405. This requires NB and SB I-405 lane reductions between Bolsa Avenue and Goldenwest.

The lane reductions will continue, 5 a.m. to 12 p.m., for approximately three weeks.

REMINDER! Euclid Street for Traffic Signal Work

Crews are performing traffic signal and street restoration activities at the Euclid/Newhope Street intersection.

This work requires intermittent lane reductions on NB Euclid and westbound Newhope.

The intermittent lane reductions are ongoing 9 p.m. to 5 a.m., through Friday, Aug. 13.

COMING SOON! Bolsa Chica Road Traffic Signal Work

Crews will begin support activities in anticipation of sound wall construction in early 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.

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 one month to accommodate the freeway widening.

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.

UPDATE! 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 for approximately one more month on weekdays.

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! NB I-405 Off-Ramp to Susan Street Closed for Approximately One Month

Crews closed the NB I-405 off-ramp to Susan on July 14, for approximately one month to accommodate the freeway widening.

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.

Beginning as early as this week, from 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.

I-405 near Bolsa

REMINDER! Crews are installing piles for the widened I-405 bridge over the railroad along SB I-405 between Bolsa Avenue and McFadden Avenue.

Ongoing 7 a.m. to 4 p.m., and will continue on weekdays for approximately two weeks.

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

Please be advised that this work may be loud.

East Garden Grove Channel

UPDATE! Crews are installing piles for the foundation of the drainage channel adjacent to Newland Street bridge.

The SB I-405 on-ramp from Edinger Avenue is set to close and SB I-405 will be reduced to three lanes between Edinger and Newland from 9 a.m. to 3 p.m. for the duration of this work.

Pile installation activity is set for Friday, Aug. 6, from 7 a.m. to 4 p.m. and continuing on weekdays and Saturdays as needed for approximately two weeks.

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

Please be advised that this work may be loud.

Goldenwest Street

REMINDER! Crews are installing piles for the Goldenwest bridge over I-405.

Ongoing 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.

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.

Westminster Boulevard

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

Pile installation activity is set to continue Monday, Aug. 9, from 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.

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.