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I-405 Improvement Project construction alert: Week of March 30

Governor Newsom has issued a “stay at home” executive order to help reduce the spread of COVID-19. Construction of public transportation projects is considered an essential service and is exempt from this order. Work will continue on the I-405 Improvement Project as scheduled.

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! Magnolia Street Bridge Demolition

Crews shifted traffic to the new side of the Magnolia bridge to prepare for the second phase of demolition. The remainder of the old bridge is set to be demolished over two weekends, beginning Saturday, April 4, under full freeway closures. Additional nighttime demolition is set to occur weeknights, beginning April 6, under freeway lane closures.

Closure Details:

NIGHT ONE:
10 p.m. Saturday, April 4, to 9 a.m. Sunday, April 5

NIGHT TWO:
10 p.m. Saturday, April 11, to 9 a.m. Sunday, April 12

CLOSURES:

  • Northbound (NB) and southbound (SB) I-405 between Magnolia and Warner
  • NB I-405 on-ramp from westbound Warner
  • NB I-405 loop on-ramp from NB Magnolia
  • SB I-405 loop on-ramp from SB Magnolia

Additional Demolition: 10 p.m. to 5 a.m. weeknights, beginning April 6 and continuing for several weeks.

Daytime Magnolia Street Lane Reductions:

Crews will be pouring concrete for a barrier wall to prepare for the bridge’s and demolition. This work will require intermittent daytime lane reductions on Magnolia.

  • NB Magnolia will be reduced to one lane between Recreation Circle and the NB I-405 loop on-ramp from Magnolia
  • SB Magnolia will be reduced to one lane between Heil Avenue and the SB I-405 loop on-ramp from Magnolia

Lane reductions will be intermittently scheduled for 8:30 a.m. to 4 p.m. for approximately one more week.

UPDATE! NB I-405 loop off-ramp to Westminster Boulevard to close April 6, for ONE YEAR

Crews are scheduled to close the NB I-405 loop off-ramp to Westminster Boulevard for approximately 12 months. This long-term closure will allow construction of new walls and ramps at this location in one stage, eliminating multiple traffic shifts and confusion for motorists.

Scheduled to close 10 p.m. Monday, April 6, for approximately one year.

UPDATE! Northbound (NB) Full Freeway Closure for Westminster Boulevard bridge falsework construction

Crews will adjust the falsework for the Westminster bridge over I-405 in Westminster.

This work requires full NB ramp, lane and freeway closures of I-405 between Edwards Street and Springdale Street.

The closure is set for 10 p.m. Wednesday, April 1, to 5:30 a.m. Thursday, April 2.

UPDATE! Northbound (NB) Full Freeway Closure for Bushard Street bridge falsework construction

Crews will begin constructing falsework for the Bushard bridge over I-405 in Fountain Valley.

This work requires full NB ramp, lane and freeway closures of I-405 between Slater Avenue and Warner Avenue

Nightly closures are set to begin Thursday, April 2, 10 p.m. to 5:30 a.m. on weeknights for approximately one week.

NEW! NB I-405 Full Freeway closure to remove an overhead sign structure

Crews will completely close NB I-405 between SR-22 and Seal Beach Boulevard to remove an overhead sign structure.

The closure is set for 11 p.m. Saturday, April 4, to 7 a.m. Sunday, April 5.

The 405 Community Outreach Team will provide closure and detour information in a future alert.

COMING SOON! NB I-405 off-ramp to Seal Beach Boulevard to close for approximately one month

The NB I-405 off-ramp to Seal Beach Boulevard is scheduled to close for approximately one month beginning in late April. The ramp will be reconstructed as part of the freeway widening.

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

COMING SOON! SB I-405 on-ramp from Edinger Avenue to close for approximately one month

The SB I-405 on-ramp from Edinger is scheduled to close for approximately one month in mid-April. The ramp will be reconstructed as part of the freeway widening.

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

Construction Activities

Seal Beach Boulevard

Crews are scheduled to install video detection for the traffic signal at Seal Beach Boulevard and Lampson Avenue.

This work will require intermittent lane reductions on Seal Beach Boulevard and Lampson.

Lane reductions are set for:

  • 9 a.m. to 3 p.m. ongoing through Friday, April 10, on weekdays

Goldenwest Street

Crews are scheduled to continue utility work on the Goldenwest Street bridge over I-405.

This work requires nightly lane reductions on Goldenwest, between Sowell Avenue and Bolsa Avenue.

  • Ongoing 10 p.m. to 5 a.m. weeknights

Euclid Street

Crews are scheduled to continue pouring concrete to support the widening of the I-405 bridge over the Santa Ana River.

This work will require intermittent lane reductions on Euclid at I-405.

NB and SB Euclid lane reductions are intermittently scheduled for:

  • Ongoing though April 3, 8:30 a.m. to 4 p.m. and 10 p.m. to 5 a.m. on weekdays

Talbert Avenue

Crews are continuing pile installation activities for the foundation of the new Talbert bridge.

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

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.

1 Comment

  1. My son in law works for OCTA. ARE THEY GOING TO PROVIDE THEM WITH SPIT GUARDS, MASKS SANITIZER SPRAY AND LIQUID?

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