The National Register of Historic Places (NRHP) was established as a result of the 1966 National Historic Preservation Act. Individual properties, as well as groups of historic structures, may be listed on the NRHP through a nomination process.

NRHP Districts, sites, buildings, structures, and objects are listed on the NRHP if they are deemed to be significant to American history or prehistory on local, regional, or national levels. To be eligible, entities must possess integrity of location, design, setting, materials, workmanship, feeling, and association, and must be considered significant under at least one of four criteria:

Criterion A – associated with events that have made a significant contribution to the broad patterns of our history;
Criterion B – associated with the lives of persons significant in our past;
Criterion C – embody the distinctive characteristics of a type, period, or method of construction, or that represent the work of a master, or that possess high artistic values or that represent a significant and distinguishable entity whose components may lack individual distinction; or
Criterion D – have yielded, or may be likely to yield, information important in prehistory or history.

ACI is experienced in evaluating and providing assessments of properties for listing and is capable of compiling the information and illustrations needed to complete an NRHP nomination. In addition, we can help clients navigate the requirements for mitigation, protection, and preservation when NRHP eligible or listed Districts, sites, buildings, structures, or objects are present within or adjacent to a project area.