Abandoned Mine Lands Unit


A team of geologists, scientists, and GIS professionals that compile a statewide database of abandoned mines and work to remediate public safety and environmental hazards posed by these mines. Remediation projects are accomplished by working with local, State, and Federal partners.

California Abandoned Mine Lands Unit Fact Sheets



Principal Areas of ​Mine Pollution (PAMP) ​ 

Topograph​ically Occurring Mine Symbols (TOMS)​

AMLU Publications​

AML Partners and Resources


National Association of Abandoned Mine Programs 

California Geological Survey 

State Mining and Geology Board 

Department of Toxic Substances Control

California State Lands Commission​


Bureau of Land Management

Mine Safety and Health Administration

Office of Surface Mining

U.S. Environmental Protection Agency

U.S. Forest Service

U.S. Geological Survey