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I-405 Improvement Project construction alert: Week of Nov. 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.

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

Click to see closures and detours on the interactive map.

REMINDER! Edinger Avenue Bridge Demolition Continues

Crews will continue to demolish the Edinger Avenue bridge over I-405 to accommodate the freeway widening. This work will require a full northbound (NB) and southbound (SB) freeway closure this weekend.

NB I-405 will be closed between Magnolia Street and Edinger, and SB I-405 will be closed between Beach Boulevard and Edinger.

The closures are set for 11 p.m. Saturday, Nov. 7, to 9 a.m. Sunday, Nov. 8.

Additional nighttime demolition will occur for several weeks under freeway lane closures. Some daytime demolition also is anticipated.

Please be advised that this work may be loud. Dates and times are subject to change due to unforeseen operational factors or inclement weather.

Sign up to receive updates specific to Edinger bridge construction via email, call or text at bit.ly/405-signup

NEW! Northbound (NB) and Southbound (SB) Full Freeway Closures for Bolsa Avenue Falsework Grading

Crews will grade for falsework for the Bolsa Avenue bridge over I-405. This work will require full NB and SB freeway closures.

  • NB I-405 will be closed between Beach Boulevard and Bolsa 11 p.m. to 5 a.m. Thursday, Nov. 12; and
  • SB I-405 will be closed between Goldenwest Street and Bolsa 11 p.m. to 5 a.m. Friday, Nov. 13.

Sign up to receive updates specific to Bolsa bridge construction via email, call or text at bit.ly/405-signup

NEW! Southbound (SB) Full Freeway Closures for Fairview Road Bridge

Crews will pour concrete for the Fairview Bridge over I-405. This work will require SB full freeway, and ramp closures, as well as lane reductions of NB I-405. The NB I-405 ramps will also be fully closed.

Nightly closures are set to begin as early as Thursday, Nov. 12, and Friday, Nov. 13.

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

Sign up to receive updates specific to Fairview bridge construction via email, call or text at bit.ly/405-signup

REMINDER! Northbound (NB) Beach Boulevard Lane Reductions

Crews are performing utility work on Beach Boulevard for approximately the next several weeks. This work requires daytime and nighttime lane reductions on NB Beach between McFadden and Edinger and nighttime closure of the NB I-405 off-ramp to Beach.

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! Newland Street Lane Reductions for Waterline Installation

Crews are installing a temporary waterline on the Newland Street bridge over I-405. This work requires lane reductions on NB and SB Newland between Edinger Avenue and Heil Avenue.

Nightly lane reductions are set to continue 8 p.m. to 5 a.m. through Friday, Nov. 6.

REMINDER! Full Northbound (NB) and Southbound (SB) Harbor Boulevard Closures for Falsework Installation

Crews will continue constructing falsework for the widened I-405 bridge over Harbor Boulevard. This work will require full closures of NB and SB Harbor between the I-405 ramps.

Nightly closures are set for Thursday,
Nov. 5, and again Monday, Nov. 9, to Friday, Nov. 13.

  • 10 p.m. to 5 a.m. Mondays through Thursdays
  • 10 p.m. to 7 a.m. Fridays

REMINDER! SB I-405 Off-Ramp to Bolsa Chica Road Closed for Approximately One Month

Crews closed the SB I-405 off-ramp to Bolsa Chica Road for approximately one month to accommodate the freeway widening.

REMINDER! SB I-405 Off-Ramp to Harbor Boulevard Closed for Approximately One Month

Crews closed the SB I-405 off-ramp to Harbor* for approximately one month to accommodate the freeway widening.

*The SB I-405 straight on-ramp will be closed concurrently during the day and will remain open during Harbor falsework activities at night.

REMINDER! NB I-405 Loop On-Ramp from Harbor Boulevard Closed for Approximately One Month

Crews closed the NB I-405 loop on-ramp from Harbor for approximately one month to accommodate the freeway widening.

Construction Activities

Fairview Road

UPDATE! Crews will continue installing piles for the foundation of a new retaining wall along northbound (NB) Fairview adjacent to Boston Way.

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

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

Edwards Street

NEW! Crews will begin installing piles for the foundation for the Edwards bridge over I-405 in the center median.

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

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.

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

Bolsa Avenue

REMINDER! Crews will continue installing piles for the wall along northbound (NB) I-405 between McFadden Avenue and Bolsa Avenue.

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

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

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.