Granite Wins $51.5M SCORE Rail Siding Contract
Southern California Regional Rail Authority awarded Granite the contract for two rail sidings under the SCORE program.
Updated on Nov. 6, 2026 in Construction
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The Southern California Regional Rail Authority awarded Granite a $51.5 million contract for the SCORE Bundled Marengo and Rancho Cucamonga Siding Extension projects. The work includes two rail sidings, one near downtown Los Angeles and one in Rancho Cucamonga.
Why it matters
Granite is the first contractor awarded a project procured under the Southern California Optimized Rail Expansion program. The sidings are expected to accommodate mobility needs ahead of the 2028 Los Angeles Olympic and Paralympic Games, affecting rail capacity across the state's southern region.
The contract is valued at $51.5 million and covers two rail sidings, one near downtown Los Angeles and one in Rancho Cucamonga. Details on the division of costs between the two sites were not provided.
The players
Southern California Regional Rail Authority
The Southern California Regional Rail Authority is the public agency that awarded the contract and oversees regional commuter rail service across Southern California.
Granite Construction
Granite Construction is a major U.S. construction and infrastructure company that has previously completed rail projects with the Riverside County Transportation Commission.
The details
Granite received the award through the SCORE program's bundled project procurement approach. The company will include the project in its 2026 fourth quarter Capital Asset Plan, and construction on the sidings is scheduled to begin in January 2027.
Timeline
2026 fourth quarter: Granite includes the project in its Capital Asset Plan.
January 2027: Construction begins on the rail sidings.
July 2028: Construction is expected to be completed.
2028: Los Angeles Olympic and Paralympic Games.
Market Landscape
Granite's award is the first project procured under the SCORE program, signaling the program's progress from planning into construction. The contract adds to the rail-infrastructure work being pursued across Southern California ahead of the 2028 Olympics.
Commuters and rail riders in Southern California may see improved rail mobility once the sidings are completed. The timeline points to changes arriving in time for the 2028 Olympic and Paralympic Games.
The takeaway
The SCORE program's first awarded project shows the Southern California rail expansion moving into construction. Residents and regional travelers should watch for construction timing as the sidings near their 2027 start.
What happens next
Construction on the rail sidings is scheduled to begin in January 2027, with completion expected in July 2028.
Further reading
For more on regional infrastructure projects, see Construction coverage across California.
Source note: This article includes information reported by Railway Track and Structures.
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