# Stockton Diamond

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Major railroad junction in California

v t e Stockton Diamond Legend UP Fresno Subdivision SR 4 Feather River Route BNSF Stockton Subdivision UP Oakland Subdivision Future configuration (2026) UP Fresno Subdivision SR 4 Hazelton Avenue BNSF Stockton Subdivision Charter Way UP Oakland Subdivision

The **Stockton Diamond** is a [railway junction](/source/Railway_junction) just south of downtown [Stockton, California](/source/Stockton%2C_California), near the intersection of Aurora Street South and East Scotts Avenue. It is the junction where the north–south running [Union Pacific](/source/Union_Pacific) [Fresno Subdivision](/source/Fresno_Subdivision) line crosses the east–west [BNSF](/source/BNSF) [Stockton Subdivision](/source/Stockton_Subdivision),[1] both [double-track railways](/source/Double-track_railway). Freight trains operate through the intersection 24 hours a day; [Altamont Corridor Express](/source/Altamont_Corridor_Express) and [Amtrak California](/source/Amtrak_California) *[Gold Runner](/source/Gold_Runner)* passenger trains also utilize the junction. Two of the sides of the "diamond" are complete and allow interchanges between the north-east and south-west legs.

## Grade separation

By 2020 the junction was the most congested in California,[2] with the level-crossing design contributing to delays throughout the state's rail network. As part of the [Valley Rail](/source/Valley_Rail_(ACE)) project, the [San Joaquin Regional Rail Commission](/source/San_Joaquin_Regional_Rail_Commission) (SJRRC) and the [California Department of Transportation](/source/California_Department_of_Transportation) (Caltrans) will [grade separate](/source/Grade_separation) the intersection, which will add capacity for future passenger rail expansion and reduce crossing interference. The Union Pacific line will be elevated above the BNSF line; construction is scheduled to start in 2023 and planned to complete in May 2026.[1]

The north–south flyover tracks will be constructed approximately 200 ft (61 m) to the east of the existing UP Fresno Subdivision, from the UP Stockton Yard to the at-grade crossing at Weber Avenue. Tracks will begin to rise at Lafayette Street and return to grade after Charter Way; a large retaining wall will be constructed between Charter and Church. Road traffic on Charter, Hazelton, and Scotts will be grade-separated under new rail bridges, while the existing at-grade crossings at Church and Lafayette would be closed.[3]: ES-8 to ES-13 When complete, the project also will finish all four sides of the diamond.[3]: 2–21

## See also

- [Colton Crossing](/source/Colton_Crossing)

## References

1. ^ [***a***](#cite_ref-Goldeen_1-0) [***b***](#cite_ref-Goldeen_1-1) Goldeen, Joe (September 20, 2020). ["Feds chip in $20M for major Stockton railroad project"](https://www.recordnet.com/story/news/2020/09/20/stockton-rail-project-awarded-20-m-federal-grant/5846852002/). *The Record*. Retrieved October 11, 2020.

1. **[^](#cite_ref-2)** Wanek-Libman, Mischa (September 15, 2020). ["The Stockton Diamond project lands $20-million BUILD grant"](https://www.masstransitmag.com/rail/infrastructure/article/21154192/the-stockton-diamond-project-lands-20million-build-grant). *Mass Transit*. Retrieved October 11, 2020.

1. ^ [***a***](#cite_ref-FEIR_3-0) [***b***](#cite_ref-FEIR_3-1) [Final Environmental Impact Report, State Clearinghouse #2020080321](https://www.stocktondiamond.com/documents/Volume%201%20(Executive%20Summary%20through%20Chapter%203.6).pdf) (PDF) (Report). San Joaquin Regional Rail Commission. June 2021.

## External links

- ["Stockton Diamond grade separation project"](https://stocktondiamond.com/). San Joaquin Joint Powers Authority (SJJPA).

[37°56′48″N 121°16′33″W / 37.946756°N 121.275872°W / 37.946756; -121.275872](https://geohack.toolforge.org/geohack.php?pagename=Stockton_Diamond&params=37.946756_N_121.275872_W_)

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