I-405 Construction Update

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 I-405/WB SR-22 Connector Crews are removing asphalt and pavement and placing base, rebar and concrete on the northbound I-405/westbound SR-22 connector. This work will require a lane reduction to one lane until about March 28.

Construction is ongoing from 7 a.m.-4 p.m. Crews may mobilize equipment as early as 6 a.m., and some activities may occur from 9 p.m.-6 a.m. as needed. This work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

NB I-405 Loop On-Ramp from Seal Beach Boulevard Crews will close the northbound I-405 loop on-ramp from Seal Beach Boulevard for approximately one month to accommodate the freeway widening. The closure is anticipated in mid- to late-April. Detailed schedule, closure and detour information will be provided before the closure.

North Gate Road

Crews are working on the foundation of two walls along southbound I-405 adjacent to North Gate Road, which remains open. The foundation consists of 130 cast-in-drilledhole (CIDH) piles. Crews will use an auger to drill large holes, install forms and steel cages and pour concrete into the holes to form the piles. The work is set to begin on the north end of the wall and will proceed south.

Work hours are from 7 a.m.4 p.m. Crews may mobilize equipment as early as 6 a.m., and some activity may occur at night. This work may be loud.

Bolsa Avenue

Crews are constructing the sound wall along southbound I-405 between the Bolsa Avenue bridge and the railroad. Activities include soil backfill and compaction, placing concrete forms, and pouring