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


What
Partial demolition of the Bolsa Avenue bridge has been rescheduled. Crews are now scheduled to demolish a portion of the bridge over northbound (NB) and southbound (SB) I-405 on Saturday, April 27.
Where
The Bolsa Avenue bridge over NB and SB I-405. The freeway will be closed in both directions between Beach Boulevard and Goldenwest Street.
Additional Closures
  • NB I-405 loop on-ramp from NB Beach Boulevard
  • NB I-405 on-ramp from SB Beach Boulevard
  • NB I-405 on-ramp from Beach Boulevard road
  • NB I-405 loop off-ramp to WB Bolsa Avenue
  • SB I-405 loop on-ramp from SB Goldenwest Street/Westminster Mall Road
  • SB I-405 loop off-ramp to EB Bolsa Avenue
Detours will be in place, and signs will be posted to guide motorists around the closures. Motorists should expect delays and use alternate routes if possible.

When
As early as 11 p.m. to 8 a.m., Saturday, April 27
Detours
NB I-405 Detour: 
  • Detour No. 1 – NB Beach Boulevard north off-ramp  NB Beach Boulevard 
→ WB SR-22 on-ramp → NB I-405
  • Detour No. 2 – NB Beach Boulevard north off-ramp → NB Beach Boulevard 
→ WB Westminster Boulevard → NB I-405 on-ramp

 
NB I-405 loop on-ramp from NB Beach Boulevard Detour:
WB Edinger Avenue → NB Goldenwest Street → NB I-405 loop on-ramp


NB I-405 on-ramp from Beach Boulevard road Detour:
WB Edinger Ave → NB Goldenwest St → NB I-405 Loop On-ramp 


NB I-405 on-ramp from SB Beach Boulevard Detour:
SB Beach Boulevard → WB Edinger Avenue → NB Goldenwest Street → NB I-405 on-ramp


NB I-405 loop off-ramp to WB Bolsa Avenue Detour:
Beach Boulevard North off-ramp → NB Beach Boulevard → WB Hazard Avenue → SB Goldenwest Street → WB Bolsa Avenue


SB I-405 Detour:
Goldenwest Street off-ramp→ EB Westminster Mall Road → SB Goldenwest Street → EB Edinger Avenue → SB I-405 on-ramp


SB I-405 loop on-ramp from SB Goldenwest Street/Westminster Mall Road Detour:
SB Goldenwest Street → EB Edinger Avenue → SB I-405 on-ramp


SB I-405 loop off-ramp to EB Bolsa Avenue Detour Detour:
Westminster Mall Road off-ramp → EB Westminster Mall Road → NB Goldenwest Street → EB Hazard Avenue → SB Hoover Street → EB Bolsa Avenue


SB I-405 on-ramp from Bolsa Avenue Detour:

SB Goldenwest Street → EB Edinger Avenue → SB I-405 on-ramp

 
 
 


What
Crews are scheduled to demolish a portion of NB and SB I-405 over the Santa Ana River.
Where
Freeway lanes will be closed in both directions between Euclid Street and Harbor Boulevard.
 
This work will require freeway lane closures, not full freeway closures.
 
When
As early as 10 p.m., Monday, April 22 to 5 a.m., Saturday, April 27
 
 

What
Falsework construction, which includes installing timber and steel beams to support construction of the new Slater Avenue bridge.
Where
Adjacent to Slater Avenue, on the NB and SB sides of I-405. The freeway will be closed in both directions between Brookhurst Street and Magnolia Street. NB and SB freeway closures will not be concurrent.
 
Additional Closures
  • NB I-405 loop on-ramp from NB Brookhurst Street
  • NB I-405 on-ramp from SB Brookhurst Street
Detours will be in place, and signs will be posted to guide motorists around the closures. Motorists should expect delays and use alternate routes if possible.

When
As early as 11 p.m. to 5 a.m., Monday, April 8 to Wednesday, April 10: NB I-405 will be closed between Brookhurst Street to Magnolia Street.
 
As early as 11 p.m. to 5 a.m., Thursday, April 11 through Friday, April 19, on weekdays: SB I-405 will be closed between Magnolia Street and Brookhurst Street.
 
SB I-405 will be closed until 6 a.m., Saturday, April 13. 
 
Detours
NB I-405 and NB Brookhurst Street Detour: NB Brookhurst Street → WB Warner Avenue → NB I-405

SB Brookhurst Street On-Ramp Detour: SB Brookhurst Street → WB Talbert Avenue → NB Magnolia Street → NB I-405

SB I-405 Detour: SB Magnolia Street → EB Talbert Avenue → SB I-405

 
 
 
 

What
Bridge construction activitites
Where
NB Bolsa Chica Road will be reduced to one lane intermittently between Duncannon Avenue and Garden Grove Boulevard.
When
As early as 9 a.m. to 3 p.m., ongoing, on weekdays

 

 
 

What
Bridge construction activities
Where
NB Magnolia Street will be reduced to one lane intermittently between the Boomers driveway and Heil Avenue.
When
 
As early as 9 a.m. to 3 p.m., ongoing, on weekdays

 

 
 

What
Underground utility work
Where
Sugar Drive will be fully closed between Cascade Lane and Rushmoor Lane
When
 
As early as 8:30 a.m. to 4 p.m., ongoing, through Friday, April 19, on weekdays 
 
The closure will be picked up after each daily shift, at approximately 4 p.m.
 
Detour
Sugar Drive → Rushmoor Lane → Whitney Drive
 
 

What
Daytime pile installation 
Where
Adjacent to Magnolia Street bridge, on the NB and SB sides of I-405.
When
 
As early as a.m. to 4 p.m. Monday April 8, for approximately three weeks
 
Crews may conduct pile installation activities at night.
 
Why
Pile installation is necessary to construct the foundation of the new Magnolia Street bridge.
 

What
Daytime pile installation
Where
Adjacent to Goldenwest Street, on the northbound and southbound sides of I-405. Crews are working near the center median columns on the freeway, behind lane closures. 
When
7 a.m. – 4 p.m. ongoing, through late April on weekdays and Saturdays
 
Why
Pile installation is necessary to construct the foundation of the new Goldenwest Street bridge.
 
 


What
Crews will demolish approximately 200 feet of the existing I-405 sound wall adjacent to NB I-405 between Warner Avenue and Magnolia Street.


The work is being done in advance of the future demolition of the Ocean View drainage channel, and will later include the installation of steel piles for shoring.


Where
NB I-405, between Warner Avenue and Magnolia Street.

When
As early as Monday, April 8 to Friday, April 12: 7 a.m. to 4 p.m. and
10 p.m. to 5 a.m.

Demolition of the wall requires lane closures on the freeway and a ramp closure, which can only be done at night.
 

What
Crews will demolish the existing I-405 sound wall adjacent to NB I-405 between McFadden Avenue and just north of the railroad crossing.


Where
NB I-405, between McFadden Avenue and just north of the railroad crossing.

When
As early as Monday, April 8: 9 p.m. to 6 a.m. on weekdays, to demolish the sound wall. 

As early as Monday, April 8: 7 a.m. to 4 p.m. to install temporary noise mitigation fencing in place of the wall, which will remain in place until the new wall is built.

Demolition of the wall requires lane closures on the freeway, which can only
be done at night. Construction of the new wall is anticipated to begin at the end of April or in May and may take approximately six to eight months to complete.


This work was rescheduled from Monday, April 1 to Monday, April 8.

 

What
Crews are working on the foundation for the new wall.


Where
Milan Street, between approximately Stratford Avenue and 200 feet south of Lowell Circle.

When
Ongoing, 7 a.m. – 4 p.m., on weekdays
 
 

What
Southern California Edison (SCE) are conducting utility work.


Where
Beach Boulevard will be fully closed between McFadden Avenue and Edinger Avenue. Center Avenue, between Huntington Village Lane and Beach Boulevard, will also be closed.
 
Access to Center Avenue will be maintained via Gothard Street and Huntington Village Lane.
 
Additional Closures:
  • NB I-405 off-ramp to NB Beach Boulevard
  • NB I-405 off-ramp to SB Beach Boulevard
  • NB I-405 off-ramp to Beach Boulevard collector/distributor road
  • NB Beach Boulevard on-ramp to NB I-405
  • SB Beach Boulevard on-ramp to NB I-405
  • Beach Boulevard collector/distributor road on-ramp to NB I-405
  • SB I-405 off-ramp to NB Beach Boulevard
  • SB I-405 off-ramp to Beach Boulevard/Center Avenue
  • SB I-405 off-ramp to Beach Boulevard collector/distributor road
  • SB Beach Boulevard/Center Avenue loop on-ramp to SB I-405
  • Beach Boulevard collector/distributor road on-ramp to SB I-405
All closures and detours will be included in the interactive map and on our closure list.
When
As early as midnight to 5 a.m. Sunday, April 7 and will continue every Sunday for approximately four weeks
Detours
Southbound Beach Boulevard Detour: Left to McFadden Avenue → Right to Newland Street  → Right to Edinger Avenue → Left to Beach Boulevard

Northbound Beach Boulevard Detour: Right to Edinger Avenue → Left to Newland Street → Left to McFadden Avenue → Left to Beach Boulevard
 
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.


To view all project closures and detours, please visit the interactive map  or click here for a pdf list. 

This article was released by the Orange County Transportation Authority.