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I-405 Improvement Project construction alert: Week of July 6

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! Edwards Street Bridge Demolition

Crews are demolishing the Edwards bridge under full freeway closures. The second half of the bridge is scheduled for demolition on Saturday, July 11.

10 p.m. Saturday, July 11, to 9 a.m. Sunday, July 12

Meanwhile, additional nighttime demolition will continue for several weeks under freeway lane closures. Some daytime demolition also is anticipated.

The bridge will remain closed during construction.

COMING SOON! Beach Boulevard Ramp Closures

Crews will close the northbound (NB) I-405 off-ramp to NB Beach and the NB Beach loop on-ramp to NB I-405 for approximately one month each to accommodate the freeway widening.

  • NB I-405 off-ramp to NB Beach is set to close as early as 10 p.m. Tuesday, July 14.
  • NB Beach loop on-ramp to NB I-405 is set to close as early as 5 a.m. Monday, July 13.

Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours and asphalt paving.

Please be advised, this work may be loud.

COMING SOON! Santa Ana River Bridge Girder Placement

Crews will begin installing pre-cast girders for the widened freeway bridge over the Santa Ana River and Euclid Street. This work will require full northbound (NB) and southbound (SB) Euclid closures.

  • Night One: 10 p.m. Friday, July 17, to 5 a.m. Saturday, July 18.
  • Night Two (if needed): 10 p.m. Monday, July 20, to 5 a.m. Tuesday, July 21

Note: Additional daytime lane reductions and nighttime directional closures on Euclid are anticipated beginning Monday, July 13, to prepare for the girder installation. All closures and detours will be included in our interactive map, and on our closure list.

COMING SOON! Goldenwest Street Bridge Demolition

Crews shifted traffic to the new side of the Goldenwest bridge. Demolition of the old portion of the bridge is scheduled to begin July 18, under full freeway closures.

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

REMINDER! Santa Ana River Trail Closed Through Monday, July 13

The Santa Ana River Trail is closed to cyclists and pedestrians for approximately one week so crews can continue construction of the widened freeway over the river.

The trail is scheduled to open 7 a.m. Monday, July 13.

REMINDER! NB I-405 off-ramp to Seal Beach Boulevard is closed for approximately one month

The NB I-405 off-ramp to Seal Beach Boulevard is closed for approximately one month. The ramp is being reconstructed as part of the freeway widening.

The ramp is scheduled to reopen July 29.

REMINDER! NB I-405 Loop On-ramp from Goldenwest Street is closed for approximately THREE MONTHS

The NB I-405 loop on-ramp from Goldenwest Street is closed for approximately three months. The ramp is being reconstructed as part of the freeway widening.

The ramp is scheduled to reopen Oct. 2

UPDATE! Southbound (SB) I-405 full freeway closures for Talbert Avenue bridge falsework construction

Crews are constructing falsework for the Talbert bridge over SB I-405.

This requires full SB freeway closures between Brookhurst Street and Euclid Street.

The closures are ongoing 10 p.m. to 5:30 a.m., and will continue for approximately two weeks.

COMING SOON! Northbound (NB) I-405 full freeway closures for Talbert Avenue bridge falsework construction

Crews will construct the falsework for the Talbert bridge over NB I-405.

This work will require full NB freeway closures between Euclid Street and Brookhurst Street.

The closures are set for 10 p.m. to 5:30 a.m. and will commence after the SB side is complete.

UPDATE! Southbound (SB) I-405 Freeway closures for Westminster Boulevard bridge falsework removal

Crews will remove the falsework from the Westminster bridge over I-405.

This work will require a full SB freeway closures at the Westminster bridge.

The closures are set for 10:30 p.m. to 5 a.m. Wednesday, July 8, to Tuesday, July 14, on weeknights.

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.

UPDATE! Nightly Bolsa Avenue bridge closures are set to continue

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

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

UPDATE! Northbound (NB) and Southbound (SB) Euclid Street intermittent closures are set to continue.

Northbound and southbound Euclid lane reductions and directional closures will be scheduled intermittently 9 a.m. to 4 p.m. and 10 p.m. to 5 a.m. through July 31.

Construction Activities

Navy Railroad

UPDATE! Crews are installing piles for the foundation of the freeway bridge over the railroad near the Westminster Mall.

  • Beginning as early as Thursday, July 9, 7 a.m. to 4 p.m. for approximately one month

Beach Boulevard

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.
  • This work also includes closing eastbound Center.
  • Nightly closures are ongoing, 9:30 p.m. to 6 a.m.

East Garden Grove Channel

UPDATE! Crews are continuing construction on the East Garden Grove Channel near the Newland Avenue bridge. Activities include installing shoring by vibrating in steel beams, excavation, demolishing concrete and hauling materials. Crews will also begin pile driving for the widened I-405 bridge over the channel.

  • 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

Bolsa Chica Road

UPDATE! Crews are scheduled to demolish the remainder of the center columns, median and foundation of the old Bolsa Chica Road bridge at night.

  • Beginning as early as Monday, July 13, 10 p.m. to 5 a.m. for approximately one week.
  • The carpool and one inside lane will be closed between SR-22 and Springdale Street.

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.