Created in 1997 and comprised of a team of geologists, scientists, and GIS professionals, DMR's Abandoned Mine Lands Unit (AMLU) mission is to collaborate with partner agencies to protect people from abandoned mine hazards in California, …

Every year people fall victim to the hazards of abandoned mines. Many sites possess serious physical safety hazards, such as open shafts or adits (mine tunnel). Thousands of sites have the potential to contaminate surface water, groundwater, or air quality. Some are such massive problems as to earn a spot on the Federal Superfund list.

To report an abandoned mine, email us at [email protected] or call the DMR toll-free hotline at 877-OLD-MINE (877-653-6463). Please provide the mine location (e.g., global positioning system point [latitude-longitude], name of nearest road, Assessor’s Parcel Number) and a description of the mine.

2025年1月7日 · In 2009, the Department of Conservation’s Division of Mine Reclamation inventoried abandoned mines on state lands which revealed that 100 school land parcels have abandoned mine features on them. Public Resources Code 6201.5 authorizes the Commission to rehabilitate abandoned mines.

Some typical accidents at abandoned mine sites include falls into unmarked mine shafts and pits, being trapped when unstable tunnels or structures collapse, and asphyxiation from lack of oxygen or the presence of toxic gases in underground mines.

The idea for the Abandoned Mine Lands Preliminary Assessment Handbook (AML Hand- book) emerged from a 1994 Abandoned Mine Workshop sponsored by the Department of Toxic Substances Control (DTSC) and the California Conference of Directors of Environmental Health, when it became evident that guidance was necessary for evaluating California's ...

2008年3月4日 · To report an abandoned mine in California, call the AMLU hotline at 1-877-OLD-MINE. Vehicle in abandoned mine shaft, Ridgecrest Resource Area, Kern County (photo courtesy of BLM). The AMLU has completed many field inventories and abandoned mine remediation projects throughout California (see map, page 2).

2023年10月17日 · In 2004, a man tried and failed to jump across a nearby open mine shaft on his motorcycle, falling 700 feet to his death. Given the scale of the problem, federal land managers face an uphill battle to reclaim these dangerous sites. Experts say that a lack of funding is the greatest challenge.

Boron essentially abandoned separating the calcium borates nearly 20 years ago when they converted to bigger equipment and from 25' to 50' mining faces. Previous Ca stockpiles ran about 11% B2O3.

The Abandoned Mine Lands (AML) program supports the BLM’s core programs by mitigating physical safety risks at AML sites on or affecting lands administered by the BLM, and providing solutions to degraded water quality and other environmental impacts.