43 C.F.R. § 3809.10 : 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 — How does BLM classify operations?

BLM classifies operations as-

(a) Casual use, for which an operator need not notify BLM. (You must reclaim any casual-use disturbance that you create. If your operations do not qualify as casual use, you must submit a notice or plan of operations, whichever is applicable. See §§3809.11 and 3809.21.);

(b) Notice-level operations, for which an operator must submit a notice (except for certain suction-dredging operations covered by §3809.31(b)); and

(c) Plan-level operations, for which an operator must submit a plan of operations and obtain BLM's approval.

43 C.F.R. § 3809.10