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I-405 Improvement Project construction alert: Week of Feb. 4


What
Removal of center median
Where
Bolsa Avenue, between Goldenwest Street and Chestnut Street/Goldenwest Circle.

Bolsa Avenue over the bridge will be reduced to one lane in each direction. The lanes for the northbound and southbound I-405 off-ramps will remain open.

When
As early as 8:30 a.m. Tuesday, Feb. 5. Work hours will be 8:30 a.m. to 4 p.m. Remove center median and establish a work area behind lane closures.

These lane closures will be continuous for up to one week to prevent motorists from driving on demolished material and to protect new asphalt/concrete that requires cure time.

However, motorists should expect intermittent lane closures for several weeks as crews prepare the bridge for partial demolition.
 
 

What Settlement fill construction
Where Adjacent to the Magnolia Street bridge, on the northbound side of I-405.
When
10 p.m. – 5 a.m. Monday, Feb. 4 through Friday, Feb. 8
 
Crews will mobilize equipment and haul fill material behind lane closures, which can only be done at night.
Why These large piles of dirt will remain in place for up to three months to compact the soil beneath them for future bridge support structures.
 
 

What
Removal of center median
Where
Westminster Boulevard, between Springdale Street and Willow Lane.

  • Eastbound Westminster Boulevard will be reduced to one lane between the southbound I-405 on-ramp and Willow Lane.
  • The merge lanes exiting the southbound I-405 off-ramp onto Westminster Boulevard will be maintained.
  • Westbound Westminster Boulevard will reduced to two lanes between the northbound I-405 on-ramp and Springdale Street.
  • The left-turn lanes onto the northbound and southbound I-405 on-ramps will be closed. Motorists will be able to access the ramps by making a U-turn at Willow Lane or Springdale Street. 
When
7 a.m.- 4 p.m. on weekdays Tuesday, Feb. 5, through Friday, Feb. 8. 
 
The closures will remain in place for the duration of this activity.
 
Please note that this work was rescheduled due to the rain.
 

What Settlement fill construction 
Where Adjacent to the Bolsa Chica Road bridge, on the northbound and southbound sides of I-405.
When
  • 7 a.m. – 4 p.m. on weekdays through Friday, Feb.8
  • 10 p.m. – 5 a.m. on weekdays through Friday, Feb. 8
Crews will mobilize equipment and haul fill material behind lane closures, which can only be done at night.
 
Why These large piles of dirt will remain in place for up to three months to compact the soil beneath them for future bridge support structures.
 
 

What
Crews are demolishing the existing I-405 sound wall and sidewalk adjacent to Milan Street.


A temporary noise barrier will be installed while the new sound wall is under construction.
The new sound wall will be approximately 15 feet high on the Milan Street side of the wall.
A new sidewalk also will be constructed.


Please be advised that this work may be loud.
Where Milan Street, between approximately Stratford Avenue and 200 feet south of Lowell Circle
When
Ongoing, 7 a.m. – 4 p.m. on weekdays, demolition of the sound wall and sidewalk; construction of the new sound wall and sidewalk.


Some work may be done at night; construction will take up to four months to complete.


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

What Daytime pile installation
Where Adjacent to Goldenwest Street, on the northbound and southbound sides of I-405.
When
6:30 a.m. – 4 p.m. on weekdays beginning as early as Monday, Feb. 4.
Why Pile installation is necessary to construct the foundation of the new Goldenwest Street bridge.
 
 

What Daytime pile installation 
Where Adjacent to McFadden Avenue, on the northbound and southbound sides of I-405.
When
Ongoing, 7 a.m. – 4 p.m. on weekdays 
Why Pile installation is necessary to construct the foundation of the new McFadden Avenue bridge.
 
 
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.