Section 106 of the National Historic Preservation Act (NHPA) requires federal agencies to consider the effects of their proposed projects on historic properties. Additionally, Section 106 gives the Advisory Council on Historic Preservation (ACHP), consulting parties, and the public the opportunity to provide input on the proposed project before a final decision is made.
Section 106 is a four-step process to ensure that preservation values are factored into federal agency planning and decisions: initiation of the process, identification of historic properties, assessment of adverse effects, and (if necessary) resolution of adverse effects. This process is illustrated in more detail below.
