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I-405 Improvement Project construction alert: Week of June 8

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! Bolsa Chica Road Bridge Traffic Shift

55-hour Closure of Garden Grove Boulevard & 36-hour Closure of Bolsa Chica Road

Crews will shift traffic to the new side of the Bolsa Chica Road bridge over I-405 in Westminser.

This work will require extended closures of Garden Grove Boulevard and Bolsa Chica Road, and the closures will be implemented in two phases.

Phase 1
Garden Grove Boulevard will be closed between Bolsa Chica and the Valley View Street on- and off-ramps. The closure is set for 10 p.m. Friday, June 12, to 5 a.m. Monday, June 15.

Phase 2
Garden Grove Boulevard will remain closed, and the Bolsa Chica /Valley View bridges will be closed between the freeway ramps. The closure is set for 5 p.m. Saturday, June 13, to 5 a.m. Monday, June 15.

All lanes will reopen 5 a.m. Monday, June 15.

UPDATE! Bolsa Chica Road Bridge Demolition

Bridge demolition is scheduled for June 19, and again on June 20.

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

COMING SOON! Goldenwest Street/Bolsa Avenue intersection to close for approximately three days over a weekend

The Goldenwest/Bolsa intersection is set to close for approximately three days over a weekend in mid-June. The closure will support the reopening of the first half of the new Goldenwest bridge.

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

COMING SOON! NB I-405 Loop On-ramp from Goldenwest Street to close for approximately THREE MONTHS

The NB I-405 loop on-ramp from Goldenwest Street is set to close for approximately three months. 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.

NEW! Nightly Bolsa Avenue bridge closures to continue for approximately one month

Crews are installing a temporary waterline in the Bolsa Avenue bridge over I-405. This work requires nightly bridge closures for approximately one month.

Nightly closures are set for 9:30 p.m. to 6 a.m.

UPDATE! Daytime Lane Reductions on NB Euclid Street continue this week

Daytime lane reductions are scheduled on Euclid so crews can mobilize equipment to continue construction of the widened freeway.

This work requires reducing Euclid to one lane in each direction between Condor Avenue/Mt. Washington Street and the freeway ramps, during the day.

  • Daily northbound Euclid lane reductions are set for 9 a.m. to 4 p.m. through Friday, June 12

UPDATE! Full Northbound (NB) and Southbound (SB) Beach Boulevard closures set to continue for falsework construction

Crews are constructing falsework for the widened freeway over Beach Boulevard.

This work requires full NB and SB ramp, lane and Beach Boulevard closures between Center Avenue and the freeway ramps.

Nightly closures are ongoing, 9:30 p.m. to 6 a.m. through Thursday, June 18.

REMINDER! NB I-405 loop off-ramp to Westminster Boulevard closed for ONE YEAR

Crews closed the NB I-405 loop off-ramp to Westminster Boulevard. The ramp will be closed for approximately 12 months to allow construction of new walls and ramps at this location in one stage, eliminating multiple traffic shifts and confusion for motorists.

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 in late June. 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.

REMINDER! SB I-405 on-ramp from Edinger Avenue closed for approximately one month

The SB I-405 on-ramp from Edinger is closed for approximately one month,and will be reconstructed as part of the freeway widening.

Scheduled to reopen Wednesday, July 1

REMINDER! SB I-405 Goldenwest Street on- and off-ramps are closed for approximately one month

The SB I-405 off-ramp to Goldenwest and the SB I-405 loop on-ramp from Goldenwest are closed for approximately one month, and will be reconstructed as part of the freeway widening.

The ramps are scheduled to reopen Tuesday, June 23.

Construction Activities

Talbert Avenue

NEW! Crews are installing piles for the foundation of a wall adjacent to the Talbert bridge.

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

East Garden Grove Channel

UPDATE! Crews began removing vegetation, installing steel piles, excavating and demolishing the drainage channel adjacent to the Newland Avenue bridge.

  • Ongoing, 7 a.m. to 4 p.m. for approximately one month
  • Crews may mobilize equipment as early as 6 a.m.
  • Some activities, such as hauling materials, may occur at night

Seal Beach Boulevard

UPDATE! Crews are installing piles for the foundation of a wall adjacent to the NB I-405 on-ramp from Seal Beach Boulevard.

  • Ongoing, 7 a.m. to 4 p.m. for approximately one more week

Magnolia Street

UPDATE! Crews are installing piles for the foundation of the new Magnolia bridge.

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

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.