featured graphic for I-405 Improvement Project

I-405 Improvement Project construction alert: Week of July 19

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.

UPDATE! Brookhurst Street Bridge Waterline Installation

Crews will begin installing a waterline in the Brookhurst bridge over I-405. This work is anticipated to begin as early as next week.

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

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

UPDATE! Fairview Road Bridge Girder Installation

Crews will install pre-cast concrete girders for the Fairview bridge over I-405. The girders are the main horizontal support beams and are part of the superstructure.

This work will require full bridge, freeway and ramp closures in late July.

Thursday, July 29:

The Fairview bridge will be closed between McCormack Lane and South Coast Drive and NB I-405 will be closed between SR-73 and Fairview:

  • 11 p.m. Thursday, July 29, to 5:30 a.m. Friday, July 30

Friday, July 30:

The Fairview bridge will be closed between McCormack Lane and South Coast Drive and I-405 will be closed between SR-73 and Fairview:

  • 11:30 p.m. Friday, July 30, to 8 a.m. Saturday, July 31.

Saturday, July 31:

The Fairview bridge will be closed between McCormack Lane and South Coast Drive and I-405 will be closed between SR-73 and Fairview:

  • 11:30 p.m. Saturday, July 31, to 9 a.m. Sunday, Aug. 1.

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

REMINDER! Edwards Street Bridge Falsework Removal

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

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

  • Wednesday, July 21;
  • Monday, July 26;
  • Tuesday, July 27;
  • Wednesday, July 28; and
  • Thursday, July 29.

The SB I-405 closures are set for 11 p.m. to 5 a.m.:

  • Thursday, July 22;
  • Monday, Aug. 2;
  • Tuesday, Aug. 3;
  • Wednesday, Aug. 4; and
  • Thursday, Aug. 5.

The schedule and directional closures are subject to change due to inclement weather or unforeseen operational issues.

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

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

Crews will close the SB I-405 on-ramp from Euclid in early August, for approximately one month, to accommodate the freeway widening.

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

UPDATE! Heil Avenue Pedestrian Bridge Concrete Pour

Crews will pour concrete for the Heil pedestrian bridge over I-405.

NB I-405 will be completely closed between Magnolia Street and Beach Boulevard, and SB I-405 will be reduced to three lanes between Newland Street and Magnolia.

The closures are set for 11 p.m. Thursday, July 22, to 5 a.m. Friday, July 23.

UPDATE! Magnolia Street Closures for Maintenance Work

Crews will continue to perform maintenance work for the Magnolia bridge over I-405 early next week.

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

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 five 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, July 23.

REMINDER! 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! 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.

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! SB I-405 Loop On-Ramp from Magnolia Street Closed for Approximately Three Months

Crews closed the SB I-405 loop on-ramp from Magnolia on May 11, for approximately four more weeks to accommodate the freeway widening.

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 four more months to advance construction on the Bolsa Chica bridge.

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 two more months 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.

Nighttime temporary traffic signal removal and permanent pole installation are anticipated in early-July.

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

UPDATE! Crews are set to work 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.

Activities are set for Monday, July 26, 7 a.m. to 4 p.m. on weekdays and Saturdays, as needed for approximately two 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

COMING SOON! Crews will resume installing piles for the bridge over the railroad along SB I-405 between McFadden Avenue and Bolsa Avenue.

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

Please be advised that this work may be loud.

Goldenwest Street

REMINDER! Crews will continue 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.

Please be advised that this work may be loud.

SR-73 Connector

UPDATE! Crews will begin installing piles for the SR-73 bridge connector over the I-405. This work will require a three-day closure of the SB I-405 on-ramp from Fairview Road.

The ramp closure is scheduled for 10 p.m. Thursday, July 22 to 5 a.m. Monday, July 26.

Pile installation is scheduled for 7 a.m. to 9 p.m. on:

  • Friday, July 23;
  • Saturday, July 24; and
  • Sunday, July 25.

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 excavate and remove concrete from the center median of the Westminster Boulevard bridge.

Ongoing 9 p.m. to 6 a.m., for approximately one week.

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.