A separate and similar map for all active mining areas drawn to the same scale in all cases shall be made of every seam which shall be worked in any mine, and the maps of all seams shall show all shafts, drifts, tunnels, incline planes, or other passageways connecting them.
Mont. Code Ann. § 50-73-204
Map for every seam
Known as the Montana Coal Mining Code
The act spans §§ 50-73-101 to 50-73-418 (43 sections).
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.