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I-405 Improvement Project construction alert: Week of Nov. 11

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

Click to see closures and detours on the interactive map.

NEW! Goldenwest Street bridge closure for concrete pour

The Goldenwest Street bridge is scheduled to close Thursday so crews can pour concrete for the bridge deck.

  • Scheduled to occur 9 p.m. Thursday, Nov. 14, to 5 a.m. Friday, Nov. 15

UPDATE! Magnolia Street bridge closures no longer needed

The Magnolia Street bridge closures for crews to pour concrete for a wall adjacent to the Magnolia bridge are no longer needed.

Closures have been canceled for:

  • 10 p.m. to 5 a.m. Friday, Nov. 15 (CANCELED)
  • 10 p.m. to 5 a.m. Thursday, Nov. 21 (CANCELED)

The 405 Community Outreach Team will continue to provide updates to the schedule as needed.

NEW! Bolsa Chica Girder Placement

Crews are set to install 14 precast concrete girders for the Bolsa Chica bridge. The girders are the main horizontal support beams for the new bridge. This work will require a full bridge closure and full freeway closures.

  • Scheduled to occur Friday, Nov. 22 and Saturday, Nov. 23

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

Construction Activities

McFadden Avenue

Crews are scheduled to install piles for the foundation of the new center columns.

  • Site prep and vibration of piles has been rescheduled to 10 p.m. Wednesday, Nov. 13, to 5 a.m. Thursday, Nov. 14.
  • Pile installation has been rescheduled to begin as early as 7 a.m. to 4 p.m. Thursday, Nov. 14, occurring onweekdays for approximately one month.
  • Crews may also conduct pile installation activities at night.

Santa Ana River

Crews are installing piles for the foundation of the widened freeway over the Santa Ana River.

  • Ongoing, 7 a.m. to 4 p.m. weekdays for approximately one month.
  • Crews may also conduct pile installation activities at night.

Bushard Street

Crews are installing piles for the foundation of the new Bushard bridge.

  • Ongoing, 7 a.m. to 4 p.m. weekdays for the remainder of the week
  • Crews may also conduct pile installation activities at night.

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.