A mine along the Lower Colorado river has been preserved for bat habitat.

The BLM, working cooperatively with partners in the Lower Colorado River Multi-Species Conservation Program, evaluate the biological importance of mines based on an "ecosystem based"  approach.  After determining that the mine was important to several different bat species along the river system a contractor was hired by the BLM to help remediate the mine.The gate allows bats to access the mine while minimizing the risks to people.    Abandoned mines such as this can be extremely dangerous. Remember to Stay Out Stay Alive!

A team of BLM resource specialists evaluated the mine for its historic, biological, and geologic values.

The entrence into the mine has been reconstructed with a "lagged" wildlife-friendly bat gate.
Bureau of Land Management (BLM)- Abandoned Mine Land (AML) program  projects  have increased during recent years, Due to the funding  given to the AML program. For example, BLM-AML program received over $8.75 million dollars through the American Recovery and Reinvestment Act (ARRA). The ARRA financed:

• 20 AML Physical projects

• 170 physical safety hazard features were closed

• 6 environmental projects

Approximately 500 projects were completed during the fiscal years of 2006-2010 on California BLM public lands. Over 2,000 features were inventoried, and site characterizations were accomplished on 1,800 sites. AML projects continue to increase over the years however, BLM’s AML program continues to achieve their objective to improve California’s public lands


AML Program Performance:

The AML program has mitigated over 1,680 safety hazards since 2005.

Workload Reporte Per Fiscal Year


Fiscal Year

Inventory Sites

Remediate Physical Safety Hazards 

Remediate Water Quality Projects

Monitoring and Maintenance



Abandoned Mine Lands


     AML Projects

     Safety and Education



     AML Publications

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