Rights under any mining claim hereafter located under the mining laws of the United States shall be subject, prior to issuance of patent therefor, to the right of the United States to manage and dispose of the vegetative surface resources thereof and to manage other surface resources thereof (except mineral deposits subject to location under the mining laws of the United States). Any such mining claim shall also be subject, prior to issuance of patent therefor, to the right of the United States, its permittees, and licensees, to use so much of the surface thereof as may be necessary for such purposes or for access to adjacent land: Provided, however, That any use of the surface of any such mining claim by the United States, its permittees or licensees, shall be such as not to endanger or materially interfere with prospecting, mining or processing operations or uses reasonably incident thereto: Provided further, That if at any time the locator requires more timber for his mining operations than is available to him from the claim after disposition of timber therefrom by the United States, subsequent to the location of the claim, he shall be entitled, free of charge, to be supplied with timber for such requirements from the nearest timber administered by the disposing agency which is ready for harvesting under the rules and regulations of that agency and which is substantially equivalent in kind and quantity to the timber estimated by the disposing agency to have been disposed of from the claim: Provided further, That nothing in this subchapter and sections
601 and
603 of this title shall be construed as affecting or intended to affect or in any way interfere with or modify the laws of the States which lie wholly or in part westward of the ninety-eighth meridian relating to the ownership, control, appropriation, use, and distribution of ground or surface waters within any unpatented mining claim.