§ 30-1-108 — Locators' rights of possession and enjoyment; "mineral boundaries" defined

The locators of all mining locations heretofore made, or which
shall hereafter be made, on any mineral vein, lode or ledge,
situated on the public domain, their heirs and assigns, shall
have the exclusive right of possession and enjoyment of all the
surface included within the lines of their locations, and of all
veins, lodes and ledges throughout their entire depth, the top
or apex of which lies inside of surface lines extended downward
vertically although such veins, lodes, or ledges may so far
depart from a perpendicular in their course downward as to
extend outside the vertical side lines of such surface
locations. But their right of possession to such outside parts
of such veins or ledges shall be confined to such portions
thereof as lie between vertical planes drawn downward as above
described, through the end lines of their locations, so
continued in their own direction that such planes will intersect
such exterior parts of such veins or ledges. And nothing in this
section shall authorize a locator or possessor of a vein or lode
which extends in it downward course beyond the vertical lines of
his claim to enter upon the surface of a claim owned or
possessed by another.