Tunnel Site
A subsurface right-of-way for accessing lode claims or exploring for undiscovered mineral deposits, up to 3,000 feet in length.
Detailed Definition
A tunnel site is a form of mining claim that provides a subsurface right-of-way for the purpose of developing a lode claim or discovering veins, lodes, or ledges through a tunnel.
Key characteristics of tunnel sites: - Maximum length: 3,000 feet from the tunnel portal - Width: Extends 1,500 feet on each side of the tunnel centerline - Provides rights to any blind veins discovered within the tunnel - Does not require discovery prior to location
Purpose of tunnel sites: - Access existing lode claims from a lower elevation - Explore for undiscovered mineral deposits - Provide drainage and ventilation for mining operations - Create efficient ore extraction routes
Tunnel sites are less common today but remain a valid form of mining location under the General Mining Law.
Related Terms
Mining Claim
A parcel of land for which a claimant has asserted a right of possession and the right to develop and extract mineral resources.
Lode Claim
A mining claim for minerals found in veins, lodes, or rock in place, such as gold, silver, or copper deposits.
BLM
The Bureau of Land Management, the federal agency that administers public lands including mining claim filings and maintenance.
Mill Site
A type of mining claim for non-mineral land used to support mining operations, limited to 5 acres.
Locatable Minerals
Minerals subject to exploration and extraction through mining claims under the Mining Law of 1872.