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For more information about this project, please contact the 405 Community Outreach Team at 405project@octa.net 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!
NEW! Full Closure of Harbor Boulevard for Construction Activities
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Crews will grade for falsework for the I-405 bridge over Harbor Boulevard. This work will require a full closure of Harbor between the I-405 ramps.

  • The closure is set for 10 p.m. to 5 a.m., Thursday, Dec. 10, and Friday, Dec. 11; if needed.  

Additionally, crews will pour concrete for the I-405 bridge over Harbor Boulevard. This work will also require a full closure of Harbor between the I-405 ramps.

  • The closure is set for 10 p.m. to 5 a.m., Thursday, Dec. 17, and Friday, Dec. 18.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.
REMINDER! Northbound (NB) I-405 Freeway Closures for Magnolia Street Bridge Falsework Grading
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Crews will grade for falsework for the Magnolia Street bridge over I-405. This work will require a full closure of NB I-405 between Magnolia and Warner Avenue.

This closure is set for 11 p.m. to 5 a.m., Wednesday, Dec. 9, and Thursday, Dec. 10.  

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.
REMINDER! Bolsa Avenue Bridge Closures for Waterline Installation Work
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Crews are installing a new waterline in the Bolsa bridge over I-405. This work requires full closures of Bolsa between Goldenwest Street and Chestnut Street.

Nightly closures are set to continue 9 p.m. to 5 a.m., Wednesday, Dec. 9, to Friday, Dec. 11.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.
REMINDER! Full Euclid Street Closure for Concrete Work
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Crews will pour concrete for the widened freeway bridge over Euclid. This work will require closing Euclid between Condor Avenue/Mt. Washington Street and the southbound freeway ramps.

Residential and business access will be maintained.

The closure is set for 10 TONIGHT Wednesday, Dec. 9, to 5 a.m., Thursday, Dec. 10.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.
UPDATE! Full Northbound (NB) and Southbound (SB)
I-405 Freeway Closures for Heil Avenue Pedestrian Bridge Construction Activities
Crews are excavating, staging equipment and loading material to prepare for pile installation activities. This work requires NB and SB I-405 freeway lane reductions between Warner Avenue and Beach Boulevard.

NB and SB I-405 lane reductions are ongoing 9 a.m. to 4 p.m., for approximately one week*. 

*SB I-405 lane reductions are set to continue Monday, Dec. 14 for approximately one more week.
UPDATE! McFadden Avenue Bridge Lane Reductions for Monument Work
Crews are constructing the McFadden bridge monument over I-405. This work will require lane reductions on McFadden in each direction between Pacific Street and Gothard Street.

Activities include rebar, form and concrete work. Flaggers will be on-site to manage traffic.

Lane reductions are ongoing 9 a.m. to
4 p.m., Wednesday, Dec. 9, to Friday,
Dec. 11.
UPDATE! Nightly Southbound (SB) I-405 Freeway Closures for Bridge Work
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Nightly SB I-405 closures are scheduled so crews can conduct construction activities for the Brookhurst Street and Magnolia Street bridges. Activities will include equipment mobilization, pile installation, shoring installation, falsework installation and grading, and column demolition for the old half of the Brookhurst bridge.

SB I-405 will be closed between Magnolia and Brookhurst.

The nightly closures are set to continue
11 p.m. to 5 a.m. on weeknights for approximately one month, as needed.
REMINDER! Southbound (SB) I-405 Off-Ramp to Bolsa Chica Road Closed for Approximately One Year
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Crews will continue the closure of the SB
I-405 off-ramp to Bolsa Chica Road for approximately one year to advance construction on the Bolsa Chica bridge.

Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours and asphalt paving.

The extended closure began on Thursday, Dec. 3, 2020. The ramp is scheduled to reopen after approximately one year.


REMINDER! Nightly Consecutive Ramp Closures Scheduled for Approximately Six Months
Crews are scheduled to close the following ramps, as needed, for six months to support bridge construction activities at Magnolia Street and Brookhurst Street: 

  • Southbound (SB) I-405 Loop On-Ramp from Magnolia
  • SB I-405 On-Ramp from Warner Avenue
  • SB I-405 Loop On-Ramp from Brookhurst

Closure hours are:
  • 10 p.m. to 5 a.m. weeknights 
  • 10 p.m. to 7 a.m. weekends
REMINDER! Northbound (NB) Beach Boulevard Lane Reductions
Crews are performing utility work on Beach Boulevard. This work requires daytime and nighttime lane reductions on NB Beach between McFadden and Edinger and nighttime closures of the NB I-405 off-ramp to Beach through mid-December.

Daytime lane reductions are set to continue 9 a.m. to 3 p.m.

Nighttime lane reductions are set to continue for as early as 7:30 p.m. to as late as 8 a.m.
REMINDER! SB I-405 Off-Ramp to Euclid Street Closed for Approximately One Month
Click image to enlarge.
Crews closed the SB I-405 off-ramp to Euclid Street for approximately one month to accommodate the freeway widening.

Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours and asphalt paving.
COMING SOON! SB I-405 On-Ramp from Westminster Boulevard to Close for Approximately One Month
Click image to enlarge.
Crews will close the SB I-405 on-ramp from Westminster for approximately one month in early January to accommodate the freeway widening.

The 405 Community Outreach Team will provide detailed detour and 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.
NEW! Crews will continue wall construction work for the retaining wall along southbound (SB) I-405, behind homes on New Hampshire Drive, Nevada Avenue, Rhode Island Circle, Maryland Circle, and Wyoming Circle. Additional activities include backfill, grading, and rebar and pile installation for the next several months.

Additionally, crews will pour concrete for the retaining wall adjacent to Moon Park. This work is anticipated to be performed at night.

  • Concrete activities are set to begin as early as 9 p.m. to 6 a.m., Wednesday, Dec. 9, and Wednesday, Dec. 16. 

  • Block wall installation is anticipated to begin in early 2021. Work hours are scheduled for 7 a.m. to 4 p.m. 

  • Pile installation activities are ongoing 7 a.m. to 4 p.m. on weekdays, for approximately two weeks

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

Activities for the wall will continue through 2021.

Activities will be suspended Christmas Day and New Year's Day.

Please be advised that this work may be loud.
REMINDER! Crews will continue installing piles for the foundation of the Brookhurst bridge over I-405, adjacent to Brookhurst. Approximately 130 piles will be used.

  • Ongoing 7 a.m. to 4 p.m. on weekdays and Saturdays, for approximately one month.

Crews may mobilize equipment as early as 6 a.m. and some activities may occur at night.

Activities will be suspended Christmas Day and New Year's Day.

Please be advised that this work may be loud.
REMINDER! Crews will continue installing piles along northbound and southbound I-405 for the foundation of the new Edinger Avenue bridge. Approximately 150 piles will be used.

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

Crews may mobilize equipment as early as 6 a.m. and some activities may occur at night.

Activities will be suspended Christmas Day and New Year's Day.

Please be advised that this work may be loud.
REMINDER! Crews will continue working on the foundation of the wall along southbound (SB) I-405, behind homes on Vermont Street. The foundation consists of approximately 180 cast-in-drilled-hole (CIDH) piles. This activity includes augering large holes, and installing rebar cages and pouring concrete into the holes to form the piles.

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

Crews may mobilize equipment as early as 6 a.m. and some activities may occur at night.

Activities will be suspended Christmas Day and New Year's Day.

Please be advised that this work may be loud.
COMING SOON! Crews will begin installing piles for the foundation of the center columns for the Bolsa Chica bridge over I-405, in the center median, west of the Bolsa Chica bridge.

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

Please be advised that this work may be loud.
Check out our new and improved website!
Finding the latest information on construction activities is now easier than ever! Check out our new and improved website! octa.net/405improvement
#405Improvement
The 405 Community Outreach Team is Still Working!
If you need to contact us, please email 405project@octa.net or call 888-400-8994. We're brainstorming new ways to keep the community engaged and informed in a time of social distancing. Stay tuned!
During the Pandemic, Keeping the Public Informed Requires Innovation
Since March, the project team has hosted 10 additional virtual community meetings, directly communicating with nearly 500 people. After the live meetings are recorded, they’re available online and have generated more than 2,100 views. Meanwhile, the team also continued to use long-established communications tools such as canvassed flyers and direct mail pieces to ensure all community members could stay up to date on major construction activities.

In addition, the 405 team has begun deploying technology to message hundreds of thousands of residents and commuters in specific areas of the project. Geofencing advertising campaigns have reached nearly 700,000 people with construction alert ads placed on apps like ESPN or Pandora Music. The messages show up on smartphones or tablets of those who live in or pass through a one-mile radius of selected construction zones.

Click here for more information.

Click here to view recorded virtual neighborhood meetings.