Two rail siding projects in Southern California will move forward under a $51.5 million construction contract awarded to Granite by the Southern California Regional Rail Authority (Metrolink). The work is part of the SCORE program, which aims to expand regional rail capacity and improve transportation connectivity across the region.
The contract covers the bundled Marengo and Rancho Cucamonga Siding Extension Projects. One siding will be constructed near downtown Los Angeles, while the second will be located in Rancho Cucamonga.
The improvements are designed to increase rail capacity and accommodate growing passenger transportation needs across Southern California. The projects also form part of the region's preparations for increased mobility demands associated with the 2028 Los Angeles Olympic and Paralympic Games.
Beyond the international sporting events, the expanded infrastructure is intended to support Metrolink's longer-term strategy for increasing regional rail capacity.
Granite expects construction to begin in January 2027, with completion targeted for July 2028. The contract will be included in the company's fourth-quarter 2026 committed awards and pursuits (CAP) report.
The award is the first project Granite has secured through the SCORE program. The company plans to draw on its previous rail construction experience with the Riverside County Transportation Commission as it begins work with Metrolink.
Rail siding improvements can support greater operating flexibility and capacity across regional rail networks. For Southern California, the projects represent part of a broader infrastructure effort to accommodate passenger growth, improve mobility and strengthen transportation capacity beyond the 2028 Games.
The award also provides Granite with an entry point into future construction opportunities under the SCORE program as regional rail expansion continues.
Source: Granite Construction.
