Featured graphic for the Orange County Transportation Authority

I-405 Improvement Project construction alert: Week of May 20



What
Crews are scheduled to continue demolishing portions of the NB and SB I-405 bridge over the Santa Ana River. Crews also are demolishing portions of the bridge structure within the river channel.
Where
Freeway lanes will be closed in both directions between Euclid Street and Harbor Boulevard.
 
This work requires freeway lane closures, not full freeway closures.
Euclid Street will be closed between Mt. Washington Street/Condor Avenue and the SB I-405 ramps at Euclid Street/Ellis Avenue, to support the overhang demolition activities. The SB I-405 loop on-ramp from Euclid Street/ Ellis Avenue will also be closed.


The bike trail on the east side of the river also will be closed intermittently. Detours will be in place, and signs will be posted to guide motorists and bicyclists around the closures.
When
As early as Wednesday May 15, for approximately one week on weeknights
  • 9 p.m. to 6 a.m. crews will demolish the freeway overhang on both the SB and NB I-405. 
  • 10 p.m. to 5 a.m. the SB I-405 loop on-ramp from Euclid Street/ Ellis Avenue will also be closed. 
Detours Euclid Street Detour No.1: Euclid Street/Ellis Avenue → Talbert Avenue → Ward Street → Ellis Avenue

SB loop on-ramp from Euclid Street/Ellis Avenue Detour: Euclid Street/Ellis → MacArthur Boulevard → Harbor Boulevard → SB I-405
 
 





What
Partial demolition of the Bolsa Avenue bridge. Crews are scheduled to demolish a portion of the bridge over northbound (NB) and southbound (SB) I-405.
Where
The Bolsa Avenue bridge over NB and SB I-405. The freeway will be closed in both directions between.

Closures

  • Bolsa Avenue will be closed between Chestnut Street and Goldenwest Street
  • NB I-405 closed from Beach Boulevard to McFadden Avenue
  • NB I-405 loop on-ramp from NB Beach Bouelvard 
  • NB I-405 on-ramp from SB Beach Boulevard
  • NB I-405 on-ramp from Beach Boulevard CD Road
  • NB I-405 loop off-ramp from WB Bolsa Avenue
  • SB I-405 closed from Goldenwest Street to 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
  • SB I-405 on-ramp from 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 Saturday, June 1: 11 p.m. to 8 a.m.
Detours
Bolsa Avenue Detours:
  • Eastbound Bolsa Detour: Bolsa Avenue → Goldenwest Street →
           Hazard Avenue → Hoover Street or Beach Boulevard → Bolsa Avenue
  • Westbound Bolsa Detour: Bolsa Avenue → Beach Boulevard → 
           Hazard Avenue → Goldenwest Street → Bolsa Avenue


NB I-405 Detour:
  • Detour No. 1: Exit Beach Boulevard south off-ramp → SB Beach Boulevard → 
           WB Edinger Avenue → NB Goldenwest Street → NB I-405 on-ramp
  • 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 SB Beach Boulevard Detour:
SB Beach Boulevard → WB Edinger Avenue → NB Goldenwest Street → NB I-405 on-ramp

NB I-405 on-ramp from Beach Boulevard CD road 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:
  • Detour No. 1: Goldenwest Street off-ramp→ EB Westminster Mall Road → 
           SB Goldenwest Street → EB Edinger Avenue → SB I-405 on-ramp
  • Detour No. 2: Springdale Street off-ramp → SB Springdale 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:
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
Partial demolition of the Westminster Boulevard bridge. Crews will demolish a portion of the bridge over northbound (NB) and southbound (SB) I-405.
Where
The Westminster Boulevard bridge over NB and SB I-405. The freeway will be closed in both directions between Westminster Boulevard and Springdale Street.
Additional Closures
  • Westminster Bouelvard, between Willow Lane and Springdale Street
  • NB I-405 loop on-ramp from NB Goldenwest Street
  • NB I-405 loop off-ramp to WB Westminster Boulevard
  • NB I-405 on-ramp from Westminster Boulevard
  • SB I-405 loop on-ramp from SB Bolsa Chica Road
  • SB I-405 loop on-ramp to EB Westminster Boulevard
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 Friday, June 7: 11 p.m. to 8:30 a.m. NB I-405 will be fully closed between
Westminster Boulevard and Springdale Street. The HOV and left two lanes will be closed on SB I-405.
And Saturday, June 8: 11 p.m. to 8:30 a.m. NB and SB I-405 will be fully closed between Springdale Street and Westminster Boulevard.
Detours
NB I-405 Detour: 
  • Detour No. 1: Exit Bolsa Avenue loop off-ramp → WB Bolsa Avenue → 
           NB Goldenwest Street → WB SR-22 on-ramp → NB I-405 Connector
  • Detour No. 2: Exit Westminster Boulevard east off-ramp → EB Westminster Boulevard
           →  NB Edward Street→ WB Garden Grove Boulevard → NB Valley View Street → 
           NB I-405 On-ramp
 
NB I-405 loop on-ramp from NB Goldenwest Street Detour
NB Goldenwest Street → WB SR-22 on-ramp → NB I-405 connector

NB I-405 loop off-ramp to WB Westminster Boulevard Detour
Exit Bolsa Avenue off-ramp → WB Bolsa Avenue → NB Springdale Street → Westminster Boulevard

NB I-405 on-ramp from Westminster Boulevard
NB Goldenwest Street → WB SR-22 on-ramp → NB I-405 connector

SB I-405 Detours:
  • Detour No. 1: Exit Springdale Street off-ramp → SB Springdale Street → EB Westminster Boulevard → SB I-405 on-ramp
  • Detour No. 2: Exit Bolsa Chica Road off-ramp → SB Bolsa Chica Road → EB Westminster Boulevard → SB I-405 on-ramp
 
SB I-405 loop on-ramp from SB Bolsa Chica Road
SB Bolsa Chica Road → EB Westminster Boulevard → SB I-405 on-ramp

SB I-405 loop on-ramp to EB Westminster Boulevard
Exit EB SR-22 Off-ramp → Exit Garden Grove Boulevard off-ramp → EB Garden Grove Boulevard →  SB Edwards Street → EB Westminster Boulevard

 
 







What
Falsework construction, which includes installing timber and steel beams to support construction of the new Goldenwest Street bridge.
Where
Adjacent to Goldenwest Street, on the NB and SB sides of I-405. SB I-405 will be closed between Springdale Street and Goldenwest Street.
 
Additional Closure
  • SB I-405 loop on-ramp from Goldenwest 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 10 p.m. to 5 a.m., Monday, May 20 to Wednesday, May 22:
SB I-405 will be closed between Goldenwest Street to Bolsa Avenue
 
As early as 10 p.m. to 5 a.m., Wednesday, May 22 to June, 1: 
NB I-405 will be closed between Bolsa Avenue and Goldenwest Street
 
Detour
SB I-405 Detours:
  • Detour No. 1: SB I-405 → SB I-405 off-ramp onto Westminster Mall Road → EB Westminster Mall Road → SB Goldenwest Street →EB Bolsa Avenue → SB I-405 on-ramp
  • Detour No. 2: SB I-405 → SB I-405 off-ramp onto Westminster Mall Road → EB Westminster Mall Road → SB Goldnwest Street → EB Edinger Avenue → SB I-405 on-ramp
NB I-405 Detours:
  • Detour No. 1: Exit Bolsa Avenue → Edwards Street → Westminster Boulevard → NB I-405
  • Detour No. 2: Exit Bolsa Avenue → Springdale Street → Westminster Bouelvard → NB I-405
 
 




What
Concrete placement for the new Slater Avenue bridge
Where
Adjacent to Slater Avenue
When
As early as 8 p.m. to 6 a.m., Tuesday, May to Wednesday, May 22 
 
Crews will haul out materials using their main haul route:
  • Magnolia Street or Bushard Street → Slater Avenue
  • Brookurst Street → Slater Avenue
 
 
 

What
Settlement fill construction
Where
Adjacent to SB I-405 bridge over the Santa Ana River bridge near Moon Park
When
As early as 9 p.m. to 6 a.m., Wednesday, May 15 for approximately two weeks, on weekdays
 
The bike path is expected to remain open.
 
 
 

What
Concrete placement for the new McFadden Avenue bridge
Where
SB I-405, adjacent to McFadden Avenue
When
As early as 10 p.m. to 5 a.m., Thursday, May 23 
 
Crews will access the work zone from the freeway side
 
 
 

What
Bridge construction activities
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
Milton Avenue will be fully closed between Willow Lane and Hefley Street
When
 
Began Monday, April 22, 2019, and expected to continue for approximately five months.
 
NOTE: If there is downtime between major activities, the contractor will, to the extent possible, reopen the roadway.

Work hours are 7 a.m. to 5 p.m., however, crews may also work at night.

Milton Avenue will be closed for the full duration of the work. Flaggers will be on site for local access, and driveways will be maintained. The sidewalk on the southwest side of Milton Avenue will be closed intermittently; pedestrians will be detoured to the opposite sidewalk.
 
Detour
Detour from Willow Lane
Westminster Boulevard → Springdale Street → Navajo Road → Hefley Street → Milton Avenue
 
Detour from Hefley Street 
Springdale Street → Westminster Boulevard → Willow Lane → Milton Avenue
 
 

What
Daytime pile installation for temporary shoring
Where
Adjacent to the Ocean View Channel, near Daisy Avenue
When
 
As early as a.m. to 4 p.m., ongoing, on weekdays
 
Crews may conduct pile installation activities at night.
 
 


What
Crews will demolish the remainder of the existing sound wall adjacent to SB I-405 between Milan Street and Springdale Street.

A new sound wall is being constructed as part of the improvement project.

A temporary sound barrier will be in place during construction of the new sound wall.

Please be advised that this work may be loud.
Where
 
Southbound I-405 between Milan Street and Springdale Street.

When

Demolition activities may begin as early as Tuesday, May 28.

Activities will occur approximately 6:30 a.m. to 4 p.m. and 10 p.m. to 5 a.m.

Crews will haul out materials behind freeway lane closures, which can only be done at night.
 

What
Crews will demolish the majority of the sound wall adjacent to northbound I-405 between Springdale Street and Valley View Street.

A new sound wall is being constructed as part of the improvement project. 

A temporary sound barrier will be in place during construction of the new sound wall.
 
Please be advised that this work may be loud. 
Where
 
NB I-405, between Springdale Street and Valley View Street.

When

Demolition activities began Monday, May 6. 

Activities will occur approximately 6:30 a.m. to 4 p.m. and 10 p.m. to 5 a.m. 

Crews will haul out materials behind freeway lane closures, which can only be done at night.
 

What
Crews are working on the foundation for the new wall and loading out material.


Where
Along SB I-405 near Talbert Avenue, adjacent to LA Fitness

When
As early as 10 p.m. to 5 a.m., Monday, May, 20 to Friday, May 24
 
 
 

What
Crews are working on the foundation for the new wall and loading out material.


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

When
As early as 9 p.m. to 6 a.m., ongoing on weekdays 
 
 
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.