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I-405 Improvement Project construction alert: Week of Dec. 9

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

Click to see closures and detours on the interactive map.

REMINDER! Southbound (SB) and Northbound (NB) Freeway Closures for Magnolia Street bridge Falsework Removal

Crews will continue removing falsework for a portion of the new Magnolia bridge this week.

This work will require full SB and NB I-405 freeway closures.

Detours will be in place for motorists to navigate around the closures. Motorists should expect delays and use alternate routes if possible.

SOUTHBOUND:

  • 11 p.m. Tuesday, Dec. 10, to 5 a.m. Wednesday, Dec. 11
  • 11 p.m. Wednesday, Dec. 11, to 5 a.m. Thursday, Dec. 12

SB Closures:

  • SB I-405 between Magnolia and Warner Avenue
  • SB I-405 loop on-ramp from SB Magnolia
  • SB I-405 loop off-ramp to EB Warner

NORTHBOUND:

  • 11 p.m. Thursday, Dec. 12, to 5 a.m. Friday, Dec. 13
  • 11 p.m. Friday, Dec. 13, to 5 a.m. Saturday, Dec. 14
  • 11 p.m. Monday, Dec. 16, to 5 a.m. Tuesday, Dec. 17

NB Closures:

  • NB I-405 between Bushard Street and Magnolia
  • NB I-405 loop on-ramp from NB Magnolia

NEW! Southbound (SB) Freeway closures for Goldenwest Street bridge falsework removal

SB I-405 will be closed so crews can remove falsework for a portion of the new Goldenwest bridge.

Scheduled to occur the nights of:

  • Tuesday, Dec. 17;
  • Wednesday, Dec. 18; and
  • Thursday, Dec. 19.

NEW! Northbound (NB) Freeway closures for Goldenwest Street bridge falsework removal

NB I-405 will be closed so crews can remove falsework for a portion of the new Goldenwest bridge

Scheduled to occur the nights of:

  • Friday, Dec. 20;
  • Monday, Dec. 23; and
  • Thursday, Dec. 26.

Construction Activity

Bushard Street

COMING SOON! Crews will shift traffic on I-405 to create a work space for construction of the center columns of the Bushard bridge.

  • Scheduled to occur in late December.

Harbor Boulevard

UPDATE! Traffic breaks and lane closures on Harbor Boulevard are scheduled to continue this weekend so crews can mobilize equipment and continue pile driving activities in the center median.

Traffic breaks are set for:

  • 3 a.m. to 5 a.m. Saturday, Dec. 14
  • Midnight to 1 a.m. Monday, Dec. 16

Lane reductions are set for:

  • 7 a.m. to 9 p.m. Saturday, Dec. 14

Beach Boulevard

COMING SOON! Crews will install piles for the foundation of the NB and SB I-405 on-ramps from Beach Boulevard.

Crews will also install piles for the foundation of the widened freeway over Beach, in the center median. This work will require lane reductions on NB Beach.

  • Scheduled to begin in late December.
  • Crews may also conduct pile installation activities at night.

Talbert Avenue

COMING SOON! Crews will install piles for the foundation of the new bridge.

  • Scheduled to begin next week.
  • Crews may also conduct pile installation activities at night.

Westminster Boulevard

Eastbound (EB) Westminster will be reduced to one lane for crews to pour concrete for the new bridge.

  • 10 p.m. to 5 a.m. weekdays intermittently for approximately three months.
  • Crews may also conduct pile installation activities at night.

McFadden Avenue

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

  • Ongoing, 7 a.m. to 4 p.m. weekdays for approximately two more weeks.
  • 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.

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.