Remediation Beaumont, California

Potrero Canyon - Background

The history of industrial activities at Potrero Canyon begins in the 1960s and early 1970s when the Grand Central Rocket Company, later named Lockheed Propulsion Company after its acquisition by a predecessor of Lockheed Martin, tested solid rocket propellant and motors at the site, and also leased portions of the site to other companies for testing ballistics and weapons. The site was first remediated between 1986 and 2002. This work included implementation of a groundwater treatment system near the rocket-motor production area.

  • Contaminants currently pose no threat to drinking water in the San Jacinto Valley.
  • 9,117-acre remote site in south Beaumont.
  • Principal industrial activities occurred in nine (9) areas.
  • Extensive investigations identified contaminants resulting from past operations.
  • Compounds of potential concern include chlorinated solvents, perchlorate, and 1,4-dioxane.
  • Approximately 182 observation wells, groundwater-monitoring wells and extraction wells in place.
Beaumont, California
Archive photo of site

Potrero Canyon - Today

  • Lockheed Martin provides general awareness training for local and state government officials and first-responders to recognize, retreat, and report for projectiles and residual explosives.
  • Dummy projectiles and residual explosives may remain in areas where munitions testing took place. Warning signs are posted and an informational kiosk is located at entrance.

Laborde Canyon - Background

  • Contaminants currently pose no threat to drinking water in the San Jacinto Valley.
  • 2,668 acres southwest of Beaumont in the San Timoteo Badlands.
  •  Approximately 75 observation wells, groundwater-monitoring wells and extraction wells in place.
  • Compounds of potential concern include chlorinated solvents, perchlorate, 1,4-dioxane, lead and zinc.
  • Principal industrial activities occurred in five (5) areas of operation.
Laborde Canyon Archive Photo

Laborde Canyon - Today

This summer (2018) Lockheed Martin will begin final environmental cleanup at Laborde Canyon, five miles southwest of Beaumont, CA; the corporation plans to begin work in August. Throughout its remediation work, Lockheed Martin will take care to protect the environment, as it has during all its investigations.

  • Biological surveys will be conducted to identify the burrows of the Stephens’ Kangaroo Rat, an endangered species, the burrows of the burrowing owl, and active nests of sensitive birds.
  • Trained biologists will be present during construction to protect these animals.
  • Construction workers will be trained on how to avoid harming wildlife.


If You Have Questions Please Contact Corporate Communications at 800.449.4486

Community Information


Potrero Canyon Timeline

  • 1986 and 2002 - Major cleanup activities.
  • 1994 to 2002 - Groundwater treatment system operated at rocket-motor production area.
  • 2002 - Newly regulated chemicals identified at the site; groundwater treatment system shut down while additional investigations conducted and remediation options reviewed.
  • 2003 - 8,552 acres sold to State of California; now managed by California Department of Fish and Wildlife. Lockheed Martin retains a 565-acre conservation easement.
  • 2014 - Proposed Remedial Action Plan (“RAP”) submitted to California Department of Toxic Substance Control.
  • 2015 - Public review of proposed RAP conducted.

Laborde Canyon Timeline

  • 1974 - Lockheed Martin operations ceased; additional activities conducted by  non-Lockheed Martin companies in the 1970s and 80s.
  • 1984 - Initial cleanup: PCB-contaminated asphalt and associated sand and gravel removed.
  • 1994 - 800 tons of waste removed from Garbage Disposal Area.
  • 2003 - Additional environmental investigations and evaluations began. Soil samples collected at various depths in 114 locations.
  • 2006 - Site sold to Riverside County.
  • 2014 - Proposed Remedial Action Plan (“RAP”) submitted to California Department of Toxic Substances Control.
  • 2016 - Public review of RAP scheduled.