405 Improvement Project Updates
The Orange County Transportation Authority, in cooperation with Caltrans, is widening the San Diego Freeway (I-405) between SR-73 and I-605.The project is improving 16 miles of I-405 between the SR-73 freeway in Costa Mesa and I-605 near the Los Angeles County line. Construction updates are as follows: NB 405 On-Ramp to Close
Crews will close the northbound I-405 on-ramp from Westminster Boulevard for approximately seven weeks to accommodate the freeway widening.
Activities include removal of the existing ramp, excavation, placement and compaction of base material, rebar and concrete work, paving, drainage installation, electrical work, and striping. The NB I-405 on-ramp from Westminster was expected to close May 11.
NB I-405 Loop Off-Ramp to Bolsa Avenue Closed
Crews are closing the NB I-405 loop off-ramp to Bolsa intermittently for approximately one week on weeknights and Saturdays to work on a retaining wall.
NB I-405 intermittent ramp closures are ongoing 8 p.m.-6 a.m. as needed.
Partial Lane Closures on SB Boulevard Crews anticipate continuing traffic signal and pedestrian ramp construction work at the intersection of Seal Beach Boulevard and Lampson Avenue.
This work will require lane reductions on Seal Beach Boulevard between Old Ranch Parkway and St. Cloud Drive. Additional closures at the Seal Beach Boulevard and Lampson intersections are anticipated.
Work was expected to start on May 10 and continue for approximately five weeks on weekdays and weeknights.
• Daytime work hours are 7:30 a.m.-4:30 p.m.
• Nighttime work hours are 10 p.m.-5 a.m.
SR-22 On-Ramp from Old Ranch Parkway Closed The Old Ranch Parkway onramp to the westbound SR-22 closed April 13 for eight months to accommodate freeway widening.
Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours, and asphalt paving.
Work hours are from 7 a.m.-4 p.m. Crews may mobilize equipment as early as 6 a.m. Nighttime work hours are 9 p.m.-6 a.m.
NB I-405 and SR-73 Off Ramps Closed Crews closed the northbound I-405 and SR-73 off-ramps to Fairview on April 5 for approximately 100 days to accommodate the freeway widening.
Bolsa Chica Road Sidewalk Closure Crews closed the sidewalk at the intersection of Old Bolsa Chica Road and Bolsa Chica Road for sidewalk, curb, pedestrian ramp and traffic signal construction on April 6. The job is expected to last approximately two months. Activities include k-rail placement, demolition and restriping on Old Bolsa Chica Road.
SB I-405 Off-Ramp to Bolsa Chica Road Closed
Crews closed the southbound I-405 off-ramp to Bolsa Chica on Oct. 27 for approximately one year to advance construction on the Bolsa Chica bridge.
Almond Avenue Update
Demolition and reconstruction of the sound walls along Almond Avenue in College Park East are anticipated to start soon. Crews will install a temporary sound barrier prior to demolition.
Bolsa Chica Road
Continuation of pile driving for the Bolsa Chica bridge over I-405 along the center median and southbound I-405 at Bolsa Chica bridge.
The work is ongoing from 7 a.m.-4 p.m. on weekdays for approximately two months.
Crews may mobilize equipment as early as 6 a.m., and some activities may occur from 9 p.m.-5 a.m. as needed.
Westminster Boulevard
Crews began working on the foundation of the retaining wall adjacent to Cascade Park along the southbound (SB) I-405 onramp from Westminster Boulevard. The foundation consists of approximately 80 cast-in-drilledhole (CIDH) piles.
Work is ongoing from 7 a.m.-4 p.m. on weekdays for approximately one month. Crews may mobilize equipment as early as 6 a.m., and some activity may occur at night.
