featured graphic for I-405 Improvement Project

I-405 Improvement Project construction alert: Week of July 12

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! Fairview Road Bridge Falsework Installation

Crews will begin installing falsework for the Fairview bridge in anticipation of girder installation. This work will require full bridge, freeway and ramp closures.

The Fairview bridge will be closed between McCormack Lane and South Coast Drive 10 p.m. to 5 a.m.:

  • Monday, July 19; and
  • Tuesday, July 20.

NB I-405 will be closed between SR-73 and Fairview 11 p.m. Monday, July 19, to 5 a.m. Tuesday, July 20.

SB I-405 will be closed between Fairview and SR-73 11 p.m. Tuesday, July 20, to 5 a.m. Wednesday, July 21.

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 Placement

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.

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.

NEW! Brookhurst Street Bridge Waterline Installation

Crews will begin installing a waterline in the Brookhurst 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.:

  • Monday, July 19;
  • Tuesday, July 20; and
  • Wednesday, July 21.

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

  • Thursday, July 22; and
  • Friday, July 23.

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

NEW! 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.

NEW! Magnolia Street Lane Reductions for Maintenance Work

Crews will perform maintenance work for the Magnolia bridge over I-405. This work will require lane reductions on Magnolia between Heil Avenue and Warner Avenue.

Magnolia will be reduced to one lane in each direction 9 p.m. to 5 a.m.:

  • Wednesday, July 14;
  • Thursday, July 15; and
  • Friday, July 16.

NEW! Heil Avenue Pedestrian Bridge Concrete Pour

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

NB I-405 will be completetly 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.

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

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 schedule, closure, and detour information in future alerts.

UPDATE! Bolsa Avenue Demolition Activities Continue

Crews will demolish the center median of the Bolsa bridge as part of the freeway widening project.

This work will require a SB I-405 closure between Goldenwest Street and Bolsa, and NB I-405 will be reduced to three lanes between McFadden Avenue and Goldenwest Street.

The closures are set for 11 p.m. Friday, July 16, to 6 a.m. Saturday, July 17.

REMINDER! NB I-405/SR-73 On- and Off-Ramp Closures

Crews will restripe the NB I-405 off-ramp to South Coast Drive and the NB I-405 Fairview Road/Susan Street/Harbor Boulevard off-ramp as part of the 100-day closure.

The following ramps are set to close 10 p.m. Wednesday, July 14, to 5 a.m. Thursday, July 15:

  • NB SR-73 on-ramp from Bear Street
  • NB SR-73 off-ramp to Fairview
  • NB SR-73/NB I-405 connector
  • NB I-405 off-ramp to South Coast*
  • NB I-405 off-ramp to Fairview
  • NB I-405 on-ramp from Fairview
  • NB I-405 off-ramp to Susan*
  • NB I-405 off-ramp to Harbor*

*I-405 NB off-ramp to Susan and Harbor will remain open during NB I-405 off-ramp to South Coast Drive closure for restriping. Once South Coast Drive off-ramp fully opens, Susan and Harbor Off-ramp will then be closed for the remainder of the closure.

UPDATE! 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 seven 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.

UPDATE! 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.

UPDATE! SB I-405 Off-Ramp to Magnolia Street Open to Traffic

The SB I-405 off-ramp to Magnolia is now open to traffic.

REMINDER! NB I-405 Off-Ramp to Susan Street to Close 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! NB I-405 and SR-73 Off-Ramps to Fairview Road Closed for Approximately 100 Days

Crews closed the NB I-405 and SR-73 off-ramps to Fairview on April 5, for approximately two more days 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 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

REMINDER! Crews will continue excavating and installing the drainage system through July in advance of wall construction. Following this work, crews will begin working on the foundation of the wall. This foundation consists of cast-in-drilled-hole (CIDH) pile installation and is anticipated to begin in late July and continue through September.

Daytime work hours are 7 a.m. to 4 p.m.
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.

Talbert Avenue

REMINDER! Crews will continue installing piles for the foundation of two walls along the SB Talbert on-ramp, adjacent to Durango River Court.

Ongoing 7 a.m. to 4 p.m., for approximately three 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.

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.

I-605

REMINDER! Crews are set to work on the foundation of a wall along NB I-405, adjacent to homes on Martha Ann Drive. The foundation consists of 11 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 Thursday, July 15, 7 a.m. to 4 p.m.for approximately two weeks.

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.