River Channels: Field Investigations

Summary
As part of the field investigations for the Southeast Gateway Line, Metro’s contractors will perform field exploratory work that includes drilling and soil sampling in the San Gabriel River, Rio Hondo River and the Los Angeles River. This work is scheduled to be performed this summer, May through July 2026. This work will help advance the preliminary design effort for Southeast Gateway Line construction project.

Schedule: May 11 to July 31, 2026

Work Hours: 7am – 6pm, Monday through Friday (pending weather and river conditions)

Locations:

San Gabriel River channel in Cerritos from Monday, May 11 to Friday, July 31
Rio Hondo River channel in South Gate from Monday, May 18 to Friday, July 31
Los Angeles River channel in South Gate from Monday, June 25 to Friday, July 31

What to Expect

Surface conditions will be restored in concrete channels after drilling is completed. 
Flaggers will be present as necessary to support passage of vehicles across public pathways (bike trails).

Noteworthy

All work has received necessary permits and approvals. 
Access to emergency responders will be maintained. 
Construction is a dynamic process and work schedules and timelines are subject to change.

Metro Updates

Construction is a dynamic process and information is subject to change without notice, visit the project website for the most up to date information.

Local access, Pedestrian Access, and Emergency Responder Access is maintained during work activities.

Metro bus stops may be relocated or lines could be impacted. For up to date information follow us on Twitter @metrolaalerts, metro.net/advisories or call 323.GOMETRO for updates and trip planning assistance. Passengers are encouraged to use the Transit App to plan their travels.

If you see an encampment or someone in need: Visit LAHSA's online outreach request site LA HOP at www.lahsa.org/portal/apps/la-hop/request.  

For more information and referrals for any Health and Human services, please dial 2‐1‐1, call (800) 399‐6993, or visit 211LA.org.

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