To direct the Secretary of the Interior to disclaim any Federal interest in lands adjacent to Spirit Lake and Twin Lakes in the State of Idaho resulting from possible omission of lands from an 1880 survey.

Requires the Secretary of the Interior: (1) to conduct a survey investigation of the conditions along the lakeshores of Spirit Lake and Twin Lakes in Idaho; (2) to resurvey the original meander lines along the lakeshores, using the results of such survey; (3) upon acceptance and approval of such surveys, to prepare a recordable disclaimer of interest with land descriptions, using the lot or tract numbers of any lands omitted due to gross error or fraud by the original surveyor and lands lying outside the record meander lines as shown on the survey plats; and (4) to record such disclaimer of interest simultaneously with the filing of the surveys. Authorizes appropriations, to be available without fiscal year limitation.