TRANSPORTATION     SITE DEVELOPMENT
    DRAINAGE & STORMWATER

 

714.966.9060 phone 
714.966.9085 fax

3151 Airway Avenue, Suite T-1
Costa Mesa, CA 92626

 


PROJECT STUDY REPORTS

 

SR-60 & SR-57/Grand Avenue Interchange Improvements

City of Industry, CA

Client: PBS&J, City of Industry

 

SR-60 & SR-57/Grand Avenue

 

The City initiated the project as a relatively straight-forward interchange improvement to support the upcoming 600-acre industrial development. Subsequently, the project evolved into a major freeway 
and interchange improvement project, likely to support a new football stadium on the 600-acre site. The project included the generation and study of improvement alternatives and preparation of a Project Study Report. Alternatives ranged from improving the existing configuration, revising the configuration to a partial cloverleaf examining two variations including loop on-ramps or loop off-ramps, to the extensive reconstruction from the south SR-57/SR-60 confluence to the north SR-57/SR-60 confluence either by separate and parallel mainlines or a freeway mainline for one route with a collector-distributor system for the other route on each side of the mainline. Widening of Grand Avenue and overcrossing replacement overcrossing were included in all alternatives.

Project was coordinated with the ongoing Caltrans construction contract for HOV lanes and the MIS for the "big-fix" project being conducted by MTA. Significant coordination occurred between the cities of Industry and Diamond Bar. Project constraints included the County golf course adjacent to the southeasterly side of the freeway, a natural watercourse parallel to the north side of the freeway, Diamond Bar's direction to reduce the Grand Avenue configuration to 6 lanes within their limits, the limited weaving distance between the interchange ramps and the SR-60/SR-57 connectors, restrictive right-of-way conditions, and high traffic volumes. We prepared utility disposition sheets, right of way sheets, the right of way data sheet, the storm water data sheet, accident analysis, and quality assurance review on the geometrics, fact sheets, cost estimates, and assistance with the PSR.

 

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