BLM Opens Comments on Castle Mountain Mine Growth Impacts
Published Date: 10/20/2025
Notice
Summary
The government is starting to study how expanding the Castle Mountain Mine in California and Nevada might affect the environment and local communities. They want to hear from the public by November 19, 2025, to help shape the study and explore different options. This project could change the land and local economy, so your voice matters now!
Analyzed Economic Effects
7 provisions identified: 1 benefits, 5 costs, 1 mixed.
Large Public-Land Disturbance Added
The proposed Phase II expansion would disturb an additional 1,800 acres of BLM-managed public land for a total project disturbance of 3,294 acres. This means much more public land near the Castle Mountain Mine in San Bernardino County, CA and Clark County, NV would be changed by mining activities.
Mine Life Extended About 30 Years
The proposed expansion would extend the mine life of the Castle Mountain Mine by approximately 30 years and would effectively quadruple the annual mining rate. That means mining operations could continue for decades at a much higher pace.
Potential Impacts to Cultural Sites
The BLM notes concerns that the expansion could affect cultural resources and sites. The agency will consult with Indian Tribal Nations and consider impacts to cultural resources during the EIS process.
Seeps and Springs May Be Affected
The notice states the project could affect seeps and springs in the area. Changes to groundwater use and new infrastructure (an underground water pipeline) are part of the proposed expansion to meet increased groundwater demand.
Biological Resources: Harm and Onsite Mitigation
The notice says there are concerns about habitat loss and impacts to native vegetation, but it also notes the mine provides wildlife guzzlers, has a rare native plant nursery, and is recognized for reclamation efforts and on-site research. The EIS will evaluate these biological-resource effects.
Recreation and Traditional Use Could Be Affected
The notice says increased visual and noise disturbances from construction and operations might affect recreational and traditional use of nearby public lands. People who hunt, hike, camp, or use the land for traditional activities near Castle Mountains National Monument and Mojave National Preserve may notice those changes.
Public Comment and EIS Schedule
The BLM opened a public scoping process and requests comments be submitted by November 19, 2025. The Draft EIS is anticipated in spring 2026, the Final EIS in summer 2026, and a Record of Decision in fall 2026; one in-person scoping meeting will be announced at least 15 days in advance.
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