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| UPRR Fresno Subdivision | |
|---|---|
| Name | Fresno Subdivision |
| Owner | Union Pacific Railroad |
| Locale | Central Valley, Fresno County, Kern County |
| Start | Porterville (north) |
| End | Bakersfield (south) |
| Length mi | approx. 100 |
| Tracks | single track with sidings |
| Gauge | Standard gauge |
| Open | 19th century (Pacific Railroad era) |
| Operators | Union Pacific Railroad |
| Connections | BNSF Railway, Santa Fe Railway legacy lines |
UPRR Fresno Subdivision
The Fresno Subdivision is a principal freight rail corridor in California's San Joaquin Valley, operated by Union Pacific Railroad and serving major agricultural, petroleum, and intermodal markets between Fresno and Bakersfield. The line parallels segments of California State Route 99 and interfaces with Class I, regional, and shortline carriers, linking to Port of Los Angeles, Port of Long Beach, and transcontinental routes. It traverses key urban centers, petroleum fields, and distribution hubs in the Central Valley.
The subdivision runs southward from the Fresno area through Clovis, Madera County, Kings County fringes, and into the Bakersfield metropolitan area near Kern County. It connects with Merced-area trackage via regional junctions and interchanges with legacy Santa Fe and Southern Pacific Railroad corridors. Along the corridor the line serves industrial spurs to Fresno Yosemite International Airport, agricultural packing houses, and facilities tied to Chevron Corporation and other energy companies serving the Kern River Oil Field. The alignment crosses significant infrastructure such as California State Route 99, Interstate 5, and the California Aqueduct.
The corridor originated in the late 19th century during expansion by companies that became part of Southern Pacific Railroad and later consolidated under Union Pacific Railroad following regulatory and corporate actions including the Railroad Revitalization and Regulatory Reform Act of 1976 era reorganizations. Early traffic reflected California Gold Rush supply routes, postwar agricultural booms tied to Dust Bowl migration, and 20th-century petroleum development. The subdivision witnessed mergers and trackage rights adjustments involving Atchison, Topeka and Santa Fe Railway, BNSF Railway predecessors, and regional shortlines like San Joaquin Valley Railroad. Infrastructure investments paralleled state initiatives under governors such as Earl Warren and Jerry Brown when modal freight priorities shifted. Notable historical events along the route include dispute-era rate negotiations influenced by the Interstate Commerce Commission and later Surface Transportation Board adjudications.
Freight operations emphasize unit grain trains, refrigerated produce consists destined for Los Angeles County, manifest freight serving Walmart, Costco Wholesale Corporation, and petrochemical trains for Chevron and Aera Energy LLC. The subdivision interchanges with long-haul routes to Chicago, Dallas, and Seattle through UP's national network and connects to intermodal ramps serving Port of Oakland and the Port of Long Beach. Daily timetable patterns include manifest freights, local yard jobs, and occasional oversized loads serving Aera Energy and utilities like Pacific Gas and Electric Company. Traffic density varies seasonally with harvest cycles tied to Sunkist-era packing and table grape shipments associated with firms in Kings County.
Key facilities include classification yards near Fresno Yard and interchange points at Bakersfield Yard, locomotive maintenance facilities, and multiple passing sidings enabling single-track capacity management. Signal systems utilize centralized traffic control influenced by Positive Train Control mandates, with field equipment interoperable with Federal Railroad Administration standards. Bridges and culverts cross waterways tied to the San Joaquin River watershed and the California aqueduct system; several are maintained to meet seismic resilience criteria reflecting guidance from United States Geological Survey. Fueling stations, crew change points, and transload terminals support traffic for operators such as Cargill and Del Monte Foods legacy shippers.
The subdivision has experienced grade crossing incidents, derailments involving bulk commodities, and safety reviews prompted by incidents investigated by the National Transportation Safety Board and Federal Railroad Administration. Collaborative safety programs involve local law enforcement, California Public Utilities Commission crossing upgrades, and community outreach with entities like California High-Speed Rail Authority stakeholders when alignments intersect planning corridors. Notable incidents prompted operational changes, speed restrictions, and infrastructure investments including upgraded signaling and improved grade crossing warning systems to reduce trespassing and vehicle collisions.
Planned and proposed projects include capacity enhancements such as extended sidings, signaling upgrades consistent with nationwide Positive Train Control deployment, and potential intermodal yard expansion to capture additional traffic from Port of Long Beach and Port of Los Angeles gateways. Discussions with regional planning bodies like the Fresno Council of Governments and funding partners including the California Transportation Commission consider investments that support freight flows while mitigating community impacts, coordinating with projects for California High-Speed Rail where right-of-way interfaces occur. Environmental review intersects with California Environmental Quality Act processes for expansions affecting sensitive habitats cataloged by California Department of Fish and Wildlife.
Category:Rail infrastructure in California Category:Union Pacific Railroad lines