HRA is one of the oldest history and archaeology consulting firms in the United States. Since 1974, we have provided consulting services for public and private clients in cultural resource management, litigation support and historical research. Our Cultural Resource Management expertise enables clients to comply with Section 106 and Section 110 requirements for cultural resource surveys and mitigation, and to meet regulations for historic preservation reports, including National Register nominations. Our History Division provides expert witness and research services for an array of litigation-related needs, particularly in tribal and treaty rights, water rights, Potentially Responsible Party and other hazardous-waste research, as well as book-length corporate and administrative histories. Our partner companies extend our cultural resource management reach from coast to coast and provide extensive document-collection and data-management services.