30 C.F.R. § 817.11 – What signs and markers must I post?

(a) General specifications. Signs and markers required under this part must -
1. (1) Be posted and maintained by the person who conducts the underground mining activities;
2. (2) Be of a uniform design throughout the operation;
3. (3) Be easily seen and read;
4. (4) Be made of durable material; and
5. (5) Conform to local ordinances and codes.
(b) Duration of maintenance. You must maintain signs and markers during the conduct of all activities to which they pertain.
(c) Mine and permit identification signs.
1. (1) You must display identification signs at each point of access from public roads to areas of surface operations and facilities on permit areas for underground mining activities.
2. (2) The signs must show the name, business address, and telephone number of the person who conducts the underground mining activities and the identification number of the current SMCRA permit authorizing underground mining activities.
3. (3) You must retain and maintain the signs until the release of all bonds for the permit area.
(d) Perimeter markers. You must clearly mark the perimeter of all areas to be disturbed by surface operations or facilities before beginning mining activities on the surface of land within the permit area.
(e) Stream buffer zone markers. You must clearly mark the boundaries of any buffer to be maintained between surface activities and a perennial or intermittent stream in accordance with §§ 784.28 and 817.57 of this chapter to avoid disturbance by surface operations and facilities.
(f) Topsoil markers. You must clearly mark stockpiles of topsoil, subsoil, or other plant growth media segregated and stored as required in the permit in accordance with § 817.22 of this part.