43 C.F.R. § 3832.41 What is a tunnel site?
Title 43 - Public Lands: Interior
A tunnel site is a subsurface right-of-way under Federal land open to mineral entry. It is used for access to lode mining claims or to explore for blind or undiscovered veins, lodes, or ledges not currently claimed or known to exist on the surface.
Title 43: Public Lands: Interior
PART 3832—LOCATING MINING CLAIMS OR SITES
Subpart D—Tunnel Sites
§ 3832.41 What is a tunnel site?
