Colton Crossing

Colton Crossing
Name	Colton Crossing
Location	Colton, California, United States
Coordinates	34°03′18″N 117°19′12″W
Type	Rail junction
Owner	BNSF Railway; Union Pacific Railroad

Colton Crossing Colton Crossing was a major at-grade railroad junction in Colton, California, United States, notable for linking transcontinental freight routes and influencing regional transportation, commerce, and urban planning. The junction connected the lines of Atchison, Topeka and Santa Fe Railway, later BNSF Railway, with the Southern Pacific Railroad mainline, later part of the Union Pacific Railroad. Its prominence drew attention from federal agencies, municipal governments, transportation authorities, and environmental groups.

History

The intersection originated in the late 19th and early 20th centuries during the expansion of the Santa Fe Railway and Southern Pacific Railroad across the transcontinental railroad network. During the Great Depression era and through World War II, the crossing became a strategic freight chokepoint supporting traffic to the Port of Los Angeles, the Port of Long Beach, the Imperial Valley, and inland distribution centers. Postwar growth in Southern California freight traffic, suburbanization in Riverside County, and the consolidation of railroads—culminating in mergers involving Santa Fe, Southern Pacific, and later Burlington Northern—amplified congestion. Regulatory oversight by the Surface Transportation Board and environmental review processes involving the California Environmental Protection Agency and United States Environmental Protection Agency framed debates over mitigation and investments. High-profile stakeholders included the City of Colton, the San Bernardino County Transportation Authority, and federal representatives from California's 31st congressional district.

Layout and infrastructure

The junction consisted of at-grade diamond crossings, interlocking signals, and adjacent classification yards operated by competing carriers. Track connections reflected historic alignments laid by Atchison, Topeka and Santa Fe Railway and Southern Pacific Transportation Company, later administered by BNSF Railway and Union Pacific Railroad respectively. Signaling systems interfaced with legacy mechanical interlockings and modern centralized traffic control equipment overseen by dispatch centers in Chicago and Oakland, California. Nearby infrastructure included the Interstate 10, Interstate 15, and state highways, freight terminals serving the Southern California Logistics Airport corridor, and the Metrolink commuter rail network operations headquartered in Irvine, California and managed in coordination with the Southern California Association of Governments. Engineering constraints involved freight car clearances established under federal Association of American Railroads standards and right-of-way considerations among municipal easements and San Bernardino County land use policies.

Operational impact and traffic

At peak, the crossing handled hundreds of freight movements daily including intermodal container trains from the Ports of Los Angeles and Long Beach, unit coal trains bound for Illinois and Midwest power plants, automotive trains servicing Detroit–Windsor manufacturing lanes, and hazardous material shipments regulated under Pipeline and Hazardous Materials Safety Administration guidelines. Delays at-grade affected schedules for BNSF and Union Pacific manifest serviced through routing decisions influenced by American Association of Railroads performance metrics and dispatching priorities from corporate headquarters such as Fort Worth, Texas for BNSF and Omaha, Nebraska for Union Pacific. Local passenger services operated by Metrolink and freight-dependent logistics providers including J.B. Hunt, Union Pacific Intermodal, and Hapag-Lloyd experienced schedule impacts, while regional transit planners at the Riverside Transit Agency and Omnitrans factored crossing delays into multimodal network resiliency studies.

Safety and incidents

Safety concerns at the junction included derailments, grade crossing collisions, and hazardous materials events overseen by the National Transportation Safety Board and the Federal Railroad Administration. Past incidents prompted investigations involving the California Public Utilities Commission and emergency responders from Colton Fire Department and San Bernardino County Fire Department. Local hospitals such as Arrowhead Regional Medical Center coordinated trauma response planning with rail carriers and the Department of Homeland Security on hazardous release scenarios. Labor organizations including the Brotherhood of Locomotive Engineers and Trainmen participated in safety briefings, while corporate safety programs at BNSF Railway and Union Pacific Railroad instituted operational changes in response to NTSB recommendations.

Legal, political, and community response

Legal and political debates over mitigation, noise, air quality, and traffic congestion involved litigation, environmental impact reports, and intergovernmental agreements among the City of Colton, San Bernardino County Board of Supervisors, the California State Assembly, and federal delegations. Community advocacy groups, environmental organizations like the Sierra Club and the Natural Resources Defense Council, and business coalitions such as the Inland Empire Economic Partnership mobilized positions. Funding and permitting negotiations engaged the Federal Highway Administration, the Federal Railroad Administration, the Caltrans, and the Metropolitan Transportation Commission. Political figures including members of Congress from California's 35th congressional district weighed federal grant allocations. Legal challenges referenced provisions of the National Environmental Policy Act and California Environmental Quality Act in pursuit of mitigation measures.

Redevelopment and grade separation project

To resolve congestion and safety concerns, stakeholders advanced a grade separation project to replace the at-grade junction with an overpass and underpass structure, a plan receiving financial support from federal grants administered by the United States Department of Transportation, state funds from California State Transportation Agency, and local contributions from the San Bernardino County Transportation Authority. Engineering contractors and design firms collaborated with railroads, including BNSF Railway and Union Pacific Railroad, to implement an elevated flyover and trench alignment conforming to civil standards by the American Society of Civil Engineers. Construction milestones involved coordination with utilities regulated by the California Public Utilities Commission, permitting from the Army Corps of Engineers for any jurisdictional waters, and mitigation monitoring under permits from the California Department of Fish and Wildlife. The completed grade separation reduced freight conflicts, shortened delays for intermodal traffic to the Ports of Los Angeles and Long Beach, and improved community access in Colton and neighboring cities such as San Bernardino and Fontana, while ongoing monitoring by the Federal Railroad Administration and regional planning agencies ensures compliance with safety and environmental commitments.

Category:Rail junctions in the United States Category:Transportation in San Bernardino County, California