• 24” Reinforced Concrete Pipe drainage system installation that will tie into the existing drainage system.
  • Crews on temporary formwork preparing the pump that will conduct the concrete pour for the retaining wall by the proposed new northbound I-405 on-ramp.
  • Crews conducting a footing concrete pour that will provide support for the retaining wall.

Latest Project News


Temporary Partial I-405 Closures 8-1-2016 and 8-2-2016


Starting on Monday night, August 1, 2016, as a part of the project’s improvements the contractor will pour asphalt concrete…

Back on Track 6-10-2016 55-Hour Weekend Closure


Back on track: The crews were able to coordinate all of the pending activities that had required the cancelation of the work originally scheduled for this weekend, Friday, June 10, thru Monday, June 13, 2016.

Temporary Lane Closure on 223rd Street


As a part of the construction activities in the project area, Southern California Edison (SCE) will remove and replace existing Edison poles along 223rd Street…

55-Hour Weekend Closures 5-20-2016 and 6-3-2016


The contractor will conduct construction weekend activities, including pile driving, at the intersection of Wilmington Avenue and E. 223rd Street.

UPDATE: Ongoing Night Work Through 5-7-2016: Northbound I-405 On- and Off-Ramp Closures


The contractor is implementing nightly ramp closures of northbound I-405 on- and off-ramps at Wilmington Avenue.

Lane Restriction on Wilmington Avenue at 223rd Street


Starting on Friday, April 15, 2016, the contractor will implement a lane restriction on the northbound Wilmington Avenue lane closest to the sidewalk…

Lane Restrictions on Wilmington Ave. and 223rd St. Through October 2015


Starting on Thursday night, October 8, 2015*, the contractor will implement intermittent lane restrictions at and around the vicinity of the Wilmington Ave. and 223rd St. intersection

Wilmington Ave. Temporary Full Street Closure


The contractor is resuming the construction activities on the east side of Wilmington Avenue (abutting the Shell and Chevron gas stations) between 223rd Street and slightly before the I-405 Bridge.

Night Work – Crane Mobilization Starting 7-13-15


Construction Notice: Pile Driving Activity – COMPLETED!


The pile driving work that was being conducted at the Dominguez Channel has been completed.

Night Work – Crane Mobilization Starting 7-13-15


In order to continue the pile driving work being conducted at the Dominguez Channel

Schedule Update: Lane Restrictions Ongoing Through Late 2015


The contractor is continuing to implement intermittent lane restrictions on Wilmington Ave. and 223rd St.

Night Work – Crane Mobilization Starting 7-6-15


In order to continue the pile driving work being conducted at the Dominguez Channel, the contractor will mobilize and reposition a crane

Schedule Update: Pile Driving Activity – Ongoing


In the upcoming three to four months, the contractor will drive piles at different locations within the project limits.

6-1-15 Lane Restrictions on Wilmington Ave. & 223rd St.


In order to continue the pile driving work being conducted at the Dominguez Channel, the contractor will mobilize and reposition a crane from the east side to the west side of the Dominguez Channel adjacent to the northbound I-405.

6-1-15 Lane Restrictions on Wilmington Ave. & 223rd St.


Starting on Monday, June 1, the contractor will implement intermittent lane restrictions on Wilmington Ave. and 223rd St.

5-18-15 Pile Driving Activity I-405 at Dominguez Channel


In the upcoming three to four months, the contractor will drive piles at different locations within the project limits (see map below for pile driving locations).

1-27-15 Widening of Wilmington Ave./Night Work


Crews will implement an overnight traffic switch between 220th St. and 223rd St. to remove the street median for the widening of Wilmington Ave.

11-24-14 Materials Excavation at New Northbound I-405 On-Ramp


The contractor will be excavating the material by the proposed new northbound I-405 on-ramp at southbound Wilmington Ave

11-13-14 Overnight Work for Concrete Pour Activities


The contractor is conducting daytime concrete pours on northbound I-405 for the construction of a transition and an auxiliary lane.

11-1-14 Saturday Work: Traffic Signal Modification


To improve traffic flow, the contractor will conduct traffic signal modifications on Wilmington Avenue.

30UPDATE 30 Day Ramp Closure – NB I405 onramp Longterm Closure, Pavement Replacement I405 Wilmington Ave Project 2


The contractor will replace the pavement on the northbound I-405 on-ramp at Wilmington Avenue and behind k-rail on the outside lane/shoulder of northbound I-405 between Wilmington Avenue and slightly north of the Dominguez Channel.

30-Day Ramp Closure – NB I-405 on-ramp Long-term Closure, Pavement Replacement – I405 Wilmington Ave Project


The contractor will replace the pavement on the northbound I-405 on-ramp at Wilmington Avenue and behind k-rail on the outside lane/shoulder of northbound I-405 between Wilmington Avenue and slightly north of the Dominguez Channel.

10-10-14 Temporary Northbound and Southbound I-405 Ramp Closures and Wilmington Ave. Traffic Shift and Traffic Modifications


The contractor is continuing with construction activities for the retaining wall at the southbound I-405 off-ramp at Wilmington Ave.

10-2-14 Temporary I-405 Ramp Closures and Wilmington Ave. Traffic Shift


The contractor has completed excavation and will continue with additional construction activities for the retaining wall at the southbound I-405 off-ramp at Wilmington Ave.

9-22-14 Temporary Freeway Lane and Ramp Restriction


The contractor has completed the construction of the retaining walls southwest and adjacent to the proposed new northbound I-405 on-ramp at Wilmington Avenue. The crews will continue to remove the temporary shoring (support) that was used during the construction of the retaining wall. A total of 10 plates and 18 beams have been taken out with 10 plates and 22 beams remaining in place.

8-21-14 Backstage at the Interchange: Photo Update


Our project team is working hard to ensure your safety and meet deadlines during construction. This work sometimes happens behind the scenes. Check out the I-405 Wilmington Avenue Interchange Modification Project website to see our team in action and learn about the daily activities that are essential for this city improvement.

7-26-14 Lane and Right-Turn Restrictions on Wilmington Avenue and 223rd Street


The contractor will string overhead power lines in order to install temporary traffic signals and conduct traffic signal modifications. This work requires temporary lane and right-turn restrictions, including signal shutoffs at the intersection of Wilmington Avenue and E. 223rd Street.

7-16-14 to 12-1-14 Wilmington Avenue Traffic Switch: Reconstruction of Center Median


Crews will removal and reconstruct the center median on Wilmington Avenue between 220th Street and 223rd Street.

7-2-14 Ramp Open Early: Southbound I-405 On-Ramp at Wilmington Avenue


The contractor has opened the newly paved southbound I-405 on-ramp at Wilmington Avenue.

Reminder: 5-30-14 to 7-3-14 Long-Term SB On-Ramp at Wilmington Closure


The contractor is continuing to reconstruct the southbound I-405 on-ramp at Wilmington Avenue. This work requires the long-term closure of southbound I-405 on-ramp at Wilmington Avenue that began on Tuesday, May 27, 2014 thru Thursday, July 3, 2014.

6-30-14 to 7-3-14 Closures List


During the construction and for the opening of the Southbound I-405 on-ramp the contractor will realign k-rail and conduct construction clean-up along the San Diego Freeway (I-405) between Alameda Street and Carson Street.

5-27-14 to 7-3-14 Long-Term SB On-Ramp at Wilmington Closure (I-405 Wilmington Ave Interchange)


The contractor will reconstruct the southbound I-405 on-ramp at Wilmington Avenue.

5-3-14 Tree Work (I-405 Wilmington Ave Interchange)


The contractor will continue the removal of trees along the westside of Wilmington Avenue.

4-15-14 to 4-18-14 ClosureLists for Lane and Ramps (I-405 Wilmington Ave Interchange)


The contractor will reset k-rail, compact dirt and tree removal along the San Diego Freeway (I-405) between Alameda Street and Carson Street. This work includes the closure of freeway lanes and a ramp.

4-10 to 5-2 Project Update Work (I-405 Wilmington Ave Interchange)


The contractor will continue constructing the new northbound I-405 on-ramp at Wilmington Avenue and
retaining wall. This work requires overnight work, street lane closures and closure of freeway lanes and a ramp. The onramp is tentatively expected to be complete in Fall 2014.

3-24-14 to 4-3-14 Closure Notice for Lane and Ramps (I-405 Wilmington Ave Interchange)


The contractor will install a storm drain and excavate for the new northbound San Diego Freeway (I-405) on-ramp at Wilmington Avenue. This work requires the closure of freeway lanes and a ramp.

3-12-14 to 3-15-14 Closure Notice for Lane and Ramps (I-405 Wilmington Ave Interchange)


The contractor will reset k-rail and remove pavement along the San Diego Freeway (I-405) between Alameda Street and Carson Street. This work includes the closure of freeway lanes and a ramp.

11-12-13 to 11-13-13 Closures List (I-405 Wilmington Ave Interchange)


The contractor will set k-rail and restripe the San Diego Freeway (I-405) between Alameda Street and Carson Street. This work includes the closure of freeway lanes and ramps.

Construction Activities

Widening of Wilmington Ave:
The crews are working on widening Wilmington Ave. by performing work on the east side of the street between the existing northbound I-405 on-ramp and 223rd St., through late Summer 2016.

New Northbound I-405 On-ramp/Ongoing:
The crews are currently working on the retaining wall and soundwall that will abut the new northbound I-405 on-ramp at Wilmington Ave. The work for the walls is expected to be completed Summer 2015.

UPDATE Long-Term Lane Restrictions:
The crews are continuing to retrofit the bridge over the Dominguez Channel. This work requires long-term lane restrictions on Wilmington Avenue and E. 223rd Street thru late December 2015.

UPDATE: Southbound I-405 On-ramp – OPEN/Ongoing Work
The southbound I-405 on-ramp is open to traffic. The crews are working on finalizing work abutting the ramp including backfilling at the retaining wall, installing barrier rail, repaving and landscaping. The work is expected to be completed May 2015.

Utility Relocation Activity:
This work involves the removal or relocations of multiple utilities underground and above ground. Such as, Sothern California Gas, Southern California Edison, Time Warner Cable, AT&T, Cal Water and other others.