NO. 9 ROAD: Route 710 Pavement Rehabilitation and Widening

Dec. 2, 2021

A partnership created solutions

(This feature published as "Rehab and Widening" in November/December 2021 issue)

The project consisted of partial demolition and widening of eight bridges.

The Route 710 Pavement Rehabilitation and Widening project spans a 3.5-mile stretch of I-710 through the cities of Commerce, Vernon, Bell, and the unincorporated area of East Los Angeles from Slauson Avenue to Route 60.

The project also included concrete pavement rehabilitation and jointed plain concrete pavement-rapid set (JPCP-RS) and continuously reinforced concrete pavement-rapid set (CRCP-RS), as well as bridge approach slab repairs on several bridges along the corridor.

All northbound lanes between Bandini Boulevard and the I-5/I-710 Interchange were replaced with JPCP-RS. The median shoulders were repaved with JPCP-RS, and the median barrier was upgraded to meet current standards. The project also included installing new overhead sign structures, an overhead changeable message sign, and upgrades to drainage.

A significant scope element of the project was the widening of the Hobart Yard Bridge in both directions for 1,300 linear ft over 18 sets of railroad tracks. In addition to the Hobart Yard Bridge, Flatiron crews demolished existing barriers and overhangs and constructed bridge widening for both sides of the freeway at six other locations. Work included installation of girders, forming, and pouring of diaphragm and backwalls and deck construction.

When crews began work in 2018, they planned to widen and rehabilitate the north and southbound lanes of Route 710 from Slauson Avenue to Route 60 in Los Angeles in seven stages. The project was completed 18 months ahead of schedule thanks to innovative solutions as a result of collaborative partnering.

To achieve this, the team relied on open, transparent communication and partnering strategies focused on delivering best-for-project ideas from each team member. Advanced planning efforts re-sequenced project staging to complete construction within 61% of the contracted schedule window with no claims or disputes. The project was completed with no lost time incidents.

Project: Route 710 Pavement Rehabilitation and Widening

Location: Commerce, California

Owners: Caltrans

Designer: California Department of Transportation – District 7

Contractor: Flatiron West Inc. (prime contractor)

Cost: $87,800,000

Length: 3.5 miles

Completion Date: Feb. 1, 2021

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