Key Terms

Adverse Effect

A term that may apply to the impact to a property which is on or eligible for the National Register of Historic Places. Adverse affect refers to the diminishment of a property's integrity, with respect to its location, design, setting, materials, workmanship, feeling, or association. The term is applied by federal agency officials, in consultation with the State (or Tribal) Historic Preservation Officer, as part of the Section 106 process.

Advisory Council on Historic Places (ACHP) (www.achp.gov)

Established by the National Historic Preservation Act in 1966, the ACHP is an independent Federal agency that promotes the preservation, enhancement, and productive use of the nation's historic sites. It serves as the primary advisory agency for the president and congress on historic preservation policy.

All Possible Planning

All possible planning means that all reasonable measures identified in the Section 4(f) evaluation to minimize harm or mitigate for adverse impacts and effects must be included in the project.

Archeological Site

An archeological site is a place (or group of physical sites) in which physical remains of past human activity that are at least 50 years old are preserved, and which has been, or may be, investigated using the discipline of archaeology and represents a part of the archaeological record. The archeological record consists of artifacts, features, ecological evidence along with their preserved positions in or on the earth.