30 U.S. Code § 1239 - Filling voids and sealing tunnels
The Congress declares that voids, and open and abandoned tunnels, shafts, and entryways resulting from any previous mining operation, constitute a hazard to the public health or safety and that surface impacts of any underground or surface mining operation may degrade the environment. The Secretary, at the request of the Governor of any State, or the the  governing body of an Indian tribe, is authorized to fill such voids, seal such abandoned tunnels, shafts, and entryways, and reclaim surface impacts of underground or surface mines which the Secretary determines could endanger life and property, constitute a hazard to the public health and safety, or degrade the environment. State regulatory authorities are authorized to carry out such work pursuant to an approved abandoned mine reclamation program.
Funds available for use in carrying out the purpose of this section shall be limited to those funds which must be allocated to the respective States or Indian tribes under the provisions of paragraphs (1) and (5) of section 1232(g) of this title.
In those instances where mine waste piles are being reworked for conservation purposes, the incremental costs of disposing of the wastes from such operations by filling voids and sealing tunnels may be eligible for funding providing that the disposal of these wastes meets the purposes of this section.
The Secretary may acquire by purchase, donation, easement, or otherwise such interest in land as he determines necessary to carry out the provisions of this section.
 So in original.
1990—Subsec. (a). Pub. L. 101–508, § 6009(1), substituted “the governing body of an Indian tribe” for “chairman of any tribe”.
Subsec. (b). Pub. L. 101–508, § 6009(2), substituted “Indian tribes under the provisions of paragraphs (1) and (5) of section 1232(g) of this title” for “Indian reservations under the provisions of subsection 1232(g) of this title”.
Subsec. (c). Pub. L. 101–508, § 6009(3), amended subsec. (c) generally. Prior to amendment, subsec. (c) read as follows: “The Secretary may make expenditures and carry out the purposes of this section without regard to provisions of section 1234 of this title in such States or Indian reservations where requests are made by the Governor or tribal chairman and only after all reclamation with respect to abandoned coal lands or coal development impacts have been met, except for those reclamation projects relating to the protection of the public health or safety.”