43 C.F.R. § 3809.11 : Public Lands: Interior — REGULATIONS RELATING TO PUBLIC LANDS — BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR — MINERALS MANAGEMENT (3000) — MINING CLAIMS UNDER THE GENERAL MINING LAWS — SURFACE MANAGEMENT —GENERAL INFORMATION — When do I have to submit a plan of operations?

(a) You must submit a plan of operations and obtain BLM's approval before beginning operations greater than casual use, except as described in §3809.21. Also see §§3809.31 and 3809.400 through 3809.434.
(b) You must submit a plan of operations for any bulk sampling in which you will remove 1,000 tons or more of presumed ore for testing.
(c) You must submit a plan of operations for any operations causing surface disturbance greater than casual use in the following special status areas where §3809.21 does not apply:
(1) Lands in the California Desert Conservation Area (CDCA) designated by the CDCA plan as "controlled" or "limited" use areas;
(2) Areas in the National Wild and Scenic Rivers System, and areas designated for potential addition to the system;
(3) Designated Areas of Critical Environmental Concern;
(4) Areas designated as part of the National Wilderness Preservation System and administered by BLM;
(5) Areas designated as "closed" to off-road vehicle use, as defined in §8340.0-5 of this title;
(6) Any lands or waters known to contain Federally proposed or listed threatened or endangered species or their proposed or designated critical habitat, unless BLM allows for other action under a formal land-use plan or threatened or endangered species recovery plan; and
(7) National Monuments and National Conservation Areas administered by BLM.

43 C.F.R. § 3809.11