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I-405 Improvement Project construction alert: Week of December 7

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.

To view and print a detailed list of closures and detours CLICK HERE!

Click to see closures and detours on the interactive map.

NEW! Full Closure of Harbor Boulevard for Construction Activities

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

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

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

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 p.m. 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

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

Crews will continue the closure of the SB I-405 off-ramp to Bolsa Chica Road forapproximately 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

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

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.

Construction Activities

Moon Park

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.

Brookhurst Street

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.

Edinger Avenue

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.

Vermont Street

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.

Bolsa Chica Road

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.

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.