54 U.S.C. § 312503: Survey and recovery by Secretary

conduct or cause to be conducted a survey and other investigation of the areas that are or may be affected; and recover and preserve the data (including analysis and publication) that, in the opinion of the Secretary, are not being, but should be, recovered and preserved in the public interest. No survey or recovery work shall be required pursuant to this section that, in the determination of the head of the responsible agency, would impede Federal or federally assisted or licensed projects or activities undertaken in connection with any emergency, including projects or activities undertaken in anticipation of, or as a result of, a natural disaster. 60 days after notification pursuant to subsection (a); or such time as may be agreed on with the head of the agency responsible for funding or licensing the project, activity, or program in all other cases. The Secretary shall, unless otherwise agreed to in writing, compensate any person, association, or public entity damaged as a result of delays in construction or as a result of the temporary loss of the use of private or nonfederally owned land.