NHPA
National Historic Preservation Act (NHPA) and Section 106 (36 CFR Part 800)
The head of any Federal agency having direct or indirect jurisdiction over a proposed Federal or federally assisted undertaking in any State and the head of any Federal department or independent agency having authority to license any undertaking shall, prior to the approval of the expenditure of any Federal funds on the undertaking or prior to the issuance of any license, as the case may be, take into account the effect of the undertaking on any district, site, building, structure, or object that is included in or eligible for inclusion in the National Register (i.e., historic properties).
Click on this link to the Section 106 process flowchart:
http://www.achp.gov/regsflow.html. Contact SHPO if you have any questions.