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I-405 Improvement Project construction alert: Week of January 25

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! Westminster Boulevard Traffic Shift

Crews will shift traffic to the new Westminster bridge over I-405. The shift will occur in three phases and will require lane reductions.

Phase 1
Eastbound traffic was shifted onto the new bridge on Tuesday, Jan. 12.

Phase 2
Crews began construction on the center median, Tuesday, Jan. 12. Work hours are 7 a.m. to 4 p.m., on weekdays and Saturdays forapproximately two weeks.

Phase 3
Crews will shift traffic to the new Westminster Boulevard bridge over I-405. The shift will require lane reductions and a directional closure. Westbound (WB) Westminster is set to close from 9:30 p.m. TONIGHT, Jan. 27, to 6 a.m. Thursday, Jan. 28. Westbound traffic will be shifted onto the new bridge at 6 a.m. Thursday, Jan. 28.

Crews may mobilize equipment as early as 6 a.m., and some activity may occur at night.

Please be advised that this work may be loud. Dates and times may change due to unforeseen operational factors or inclement weather.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.

COMING SOON! Westminster Boulevard Bridge Partial Demolition

Crews will demolish the second half of the Westminster bridge over I-405.
The bridge will be partially demolished over two nights, under full freeway closures.

Additional nighttime demolition will occur for several weeks under freeway lane closures. Some daytime demolition also is anticipated.

  • Night One: 10 p.m. Saturday, Jan. 30, to 8:30 a.m. Sunday, Jan. 31
  • Night Two: 10 p.m. Saturday, Feb. 6, to 8:30 a.m. Sunday, Feb. 7

I-405 will be closed in each direction during nighttime demolition.

Dates and times may change due to unforeseen operational factors or inclement weather.

Please be advised that this work may be loud.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.

COMING SOON! Fairview Road Traffic Shift

Crews will soon shift traffic to the new half of the Fairview bridge over I-405 and begin working on the second half of that bridge. The traffic shift is anticipated to start at 9:30 p.m., Thursday, Feb. 11, to 6:30 a.m., Friday, Feb. 12 and will require bridge and ramp closures.

Demolition of the second half of the bridge will occur over two weekends, under full freeway closures and is anticipated for late February.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.

NEW! Southbound (SB) I-405 On-Ramp from Fairview Road to Close for Approximately Ten Days

Crews are anticipated to close the Southbound (SB) I-405 on-ramp from Fairview 10 p.m. Jan. 31, for approximately ten days to accommodate the freeway widening and traffic shift.

Additionally, crews are anticipated to close the Fairview bridge in preparation of the Fairview SB I-405 on-ramp extended closure.

The full Fairview bridge closure is anticipated as early as:

  • 12 a.m. to 5 a.m., Saturday, Jan. 30
  • 9:30 p.m., Sunday, Jan. 31, to 6 a.m., Monday, Feb. 1

Crews are also anticipated to close the Northbound (NB) I-405 off-ramp to Fairview 12 p.m., Monday, Feb. 8, to 6 a.m., Tuesday, Feb. 9 toaccommodate the freeway widening and traffic shift.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.

NEW! Northbound (NB) Beach Boulevard Lane Reductions

Crews will perform utility work on Beach Boulevard. This work will require daytime lane reductions on NB Beach between McFadden and Edinger.

Daytime lane reductions are set to begin as early as 9 a.m. to 3 p.m., Wednesday, Feb. 3.

UPDATE! Full Northbound (NB) Freeway Closures for Talbert Falsework Removal

Crews will continue removing the falsework at the Talbert bridge over I-405. This work requires NB full directional freeway closures between Brookhurst Street and Euclid Street.

NB nightly full freeway closures are set to continue 10 p.m. to 5:30 a.m.:

  • Wednesday, Jan. 27 through Friday, Jan. 29

Dates and times are subject to change due to unforeseen operation factors or inclement weather.

COMING SOON! Magnolia Street Full Closure for Concrete Work

Crews will begin concrete work for the Magnolia bridge I-405 in early-February.

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

COMING SOON! Full Southbound (SB) and Northbound (NB) Freeway Closures for Edwards Street Falsework Installation

Crews will begin constructing falsework for the Edwards bridge over I-405 in early-February. This work will require full closures of NB and SB I-405.

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

UPDATE! Full Northbound (NB) and Southbound (SB) Harbor Boulevard Closure for Concrete Work

Crews rescheduled the concrete pour for the widened I-405 bridge over Harbor. This work will require a full closure of Harbor between the I-405 ramps.

The full closure is anticipated to resume early-February.

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

UPDATE! Bolsa Avenue Full Closure for Concrete Work

Crews will continue concrete work for a retaining wall along eastbound (EB) Bolsa Avenue. This work requires full closures of Bolsa between Goldenwest Street and Chestnut Street.

Nightly closures are set to continue Monday, Feb. 1, 9 p.m. to 5 a.m. on weeknights, for approximately three weeks.

A detour will be in place for pedestrians and bicyclists to navigate around the closure.

UPDATE! Talbert Avenue Bridge Work

Crews will continue construction of the Talbert Avenue bridge over the I-405. This work will require intermittent lane reductions at the intersection of Talbert and Ward Avenue and at Talbert and Brookhurst Street. Ongoing construction activities include demolition, grading, concrete pours and restoration.

Crews closed the northwest sidewalk and the curb lane at the intersection of southbound Brookhurst and westbound Talbert.

  • Closures are ongoing until 9 p.m. Wednesday, Jan. 27.

Crews will close the southeast curb lanes at the intersection of southbound Ward and eastbound/westbound Talbert.

Closures are set to begin as early as 9 p.m. Wednesday, Jan. 27, to 9 p.m. Friday, Jan. 29.

Intermittent sidewalk closures with pedestrian detour signage/flaggers will be present to navigate around the closures.

REMINDER! Nightly Southbound (SB) I-405 Freeway Closures for Bridge Work

Nightly SB I-405 closures are scheduled to continue for Brookhurst Street bridge construction. Activities include equipment mobilization, pile installation, shoring installation, falsework installation and grading, and column demolition for the old half of the Brookhurst bridge.

SB I-405 will be closed between Magnolia and Brookhurst.

The nightly closures are set to continue 11 p.m. to 5 a.m. on weeknights for approximately three weeks, as needed.

REMINDER! Northbound (NB) and Southbound (SB) I-405 Freeway Lane Reductions for Pile Installation

Crews closed the inside lanes on the SB and NB I-405 between Beach Boulevard and Newland Street for approximately one month to advance pile installation activities for the Edinger Avenue bridge.

Daily daytime freeway lane closures are set to continue as early as 6 a.m. to 12 p.m., for approximately one month, as needed.

Please be advised that this work may be loud. Dates and times may change due to unforeseen operational factors or inclement weather.

REMINDER! Nightly Consecutive Ramp Closures Scheduled for Approximately Six Months

Nightly closures of the following ramps will be scheduled as needed for six monthsto support bridge construction activities at Magnolia and Brookhurst:

  • Southbound (SB) I-405 Loop On-Ramp from Magnolia
  • SB I-405 On-Ramp from Warner Avenue
  • SB I-405 Loop On-Ramp from Brookhurst

Closure hours are:

  • 10 p.m. to 5 a.m. weeknights
  • 10 p.m. to 7 a.m. weekends

REMINDER! Southbound (SB) I-405 On-Ramp from Harbor Boulevard Closed for Approximately One Month

Crews closed the southbound (SB) I-405 on-ramp from Harbor Boulevard on Jan. 4, 2021 for approximately one month to advance construction for the SB I-405 to SB SR-73 connector.

Additionally, crews closed two outside lanes on the SB I-405 to SB SR-73 connector to perform permanent pavement construction.

UPDATE! Southbound (SB) I-405 On-Ramp from Westminster Boulevard NOW OPEN!

The SB I-405 on-ramp from Westminster Boulevard is now open to traffic.

REMINDER! Northbound (NB) I-405 On-Ramp from South Coast Drive/Hyland Avenue Closed for Approximately Two Months

Crews closed the NB I-405 on-ramp from South Coast Drive/ Hyland Avenue on Jan. 11, 2021 for approximately two months to accommodate the freeway widening.

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

REMINDER! Southbound (SB) I-405 Off-Ramp to Bolsa Chica Road Closed for Approximately One Year

Crews closed the SB I-405 off-ramp to Bolsa Chica Road on Dec. 3, 2020 for approximately one year to advance construction on the Bolsa Chica bridge.

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

Construction Activities

Fairview Road

UPDATE! Crews are scheduled to pour concrete for the retaining wall along northbound (NB) Fairview Road, south of the on-ramp to SB I-405 and SB SR-73. This work will also require NB Fairview lane reductions between McCormack Lane and freeway ramps.

  • Concrete activities are set for as early as 9 p.m. to 6 a.m., Saturday, Jan. 30.

Note: Dates and times are subject to change due to unforeseen operational factors or inclement weather.

Harbor Boulevard

NEW! Crews will begin installing piles for the foundation of a wall adjacent to the southbound (SB) I-405 on-ramp from Harbor.

  • Beginning as early as Tuesday, Feb. 2, 7 a.m. to 4 p.m. on weekdays, for approximately two months.
  • Mobilization is set to take place from 6 a.m. to 7 a.m.

Crews may also conduct activities at night.

Note: Dates and times are subject to change due to unforeseen operational factors or inclement weather.

Heil Avenue

REMINDER! Crews will continue installing piles for the foundation of the Heil Avenue pedestrian bridge over I-405.

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

Crews may mobilize equipment as early as 6 a.m. and some activities may occur at night.

REMINDER! Crews continue construction activities for the Heil pedestrian bridge over I-405. Activities include excavation, shoring, and pile driving to continue forming the foundation of the bridge.

Following this work, crews will begin forming the footings and columns, as well as construct the falsework to form the spans over the freeway.

This work requires an extended closure of Heil between Ross Lane and Landau Lane.

The closure began on Wednesday, Dec. 30, and is expected to continue for approximately seven months.

Residential access will be maintained at all times.

Edinger Avenue

REMINDER! Crews will continue installing piles along northbound and southbound I-405 for the foundation of the new Edinger Avenue bridge. Approximately 150 piles will be used.

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

Crews may mobilize equipment as early as 6 a.m. and some activities may occur at night.

Vermont Street

REMINDER! Crews will continue working on the foundation of the wall along southbound (SB) I-405, south of Bolsa Ave. The foundation consists of approximately 180 cast-in-drilled-hole (CIDH) piles. This activity includes augering large holes, and installing rebar cages and pouring concrete into the holes to form the piles.

Ongoing 7 a.m. to 4 p.m. on weekdays and Saturdays, for approximately two months.

Crews may mobilize equipment as early as 6 a.m. and some activities may occur at night.

Goldenwest Street

REMINDER! Crews will continue installing piles for the foundation of Goldenwest bridge over I-405 along northbound and southbound I-405, adjacent to Goldenwest.

  • Ongoing 7 a.m. to 4 p.m. on weekdays, for approximately two months.

Crews may mobilize equipment as early as 6 a.m. and some activities may occur at night.

Bolsa Chica Road

COMING SOON! Crews will begin installing piles for the foundation of the center columns for the Bolsa Chica bridge over I-405, in the center median, west of the Bolsa Chica bridge.

The 405 Community Outreach Team will provide detailed schedule information in future alerts.

Almond Avenue

REMINDER! Crews have begun relocating the fire hydrants along Almond Avenue to make room in the street for the sound wall activities. This work requires lane closures on Almond Avenue between Daisy Street and Pansy Circle. Access to all streets and driveways will always be maintained and the crew will include flaggers to assist with traffic control.

Below is an anticipated schedule of activities:

  • The week of Jan. 19, crews began excavating on Almond Avenue to tap into the main waterline for the new hydrants.
  • Then for approximately two weeks, crews will continue excavation, perform waterline system testing, and sidewalk repair activities.
  • The week of Feb. 16, crews are anticipated to remove the valves for the old fire hydrants. This work will require shutting off water for up to six hours between 9 a.m. and 3 p.m. The outreach team will provide you and your neighbors with an update prior to this water shutoff.

What’s Next?
Demolition and reconstruction of the sound walls along Almond Avenue are anticipated to commence as early as February 2021. Crews will install a temporary sound barrier prior to demolition.

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.