Section 106, NEPA/SEPA Compliance

Our Cultural Resources Management compliance services include:

  • Desktop/Class I inventories
  • Historic and archival research
  • Tribal consultation
  • NEPA/SEPA integration
  • Intensive/Class III surveys
  • Archaeological and historic resource documentation
  • Cultural landscape inventories and reports
  • Traditional Cultural Properties/Traditional Land-Use studies
  • National Register evaluations
  • Effects determinations
  • Agreement documents (MOAs, MOUs)
  • Mitigation of adverse effects projects (data recovery, HABS/HAER, interpretive displays and documents)
  • Historic Properties Management Plans
  • 4f documentations

HRA also assists clients and agencies in the energy, transportation, federal, communications, and development sectors. Our projects range from large multistate linear corridors to individual property assessments. Our projects include:

  • Interstate oipelines
  • Transmission lines and facilities
  • Highway improvements and bridge replacements
  • Hydropower relicensing and implementation
  • Land exchanges
  • Alternative energy generation (solar, wind, geothermal)
  • Mines
  • Commercial and residential developments

Featured Members

Featured Projects

Baseline Wind Farm

HRA conducted a cultural resources survey under contract with HDR Engineering for the Baseline Wind Project, a 200–500 MW wind energy project in Gilliam County, Oregon, proposed by developer First Wind.

BPA Libby to Troy Transmission Line

HRA conducted background research for cultural resources, an intensive cultural resource survey, and cultural resource monitoring for the Bonneville Power Administration’s (BPA’s) 17-mile-long Libby to Troy Transmission Line Rebuild Project in Lincoln County, Montana.

Bunker Hill Mining and Metallurgic Superfund Site

Contracted since 2010 to Coeur D’Alene Trust (Trust), HRA has been assisting the Environmental Protection Agency (EPA) in following its applicable or relevant and appropriate requirements in order to comply with the substance of Section 106 of the National Historic Preservation Act as regards its cleanup actions at the Bunker Hill Superfund Site (BHSS) in Northern Idaho’s Silver Valley.

Burke-Gilman Trail

The Seattle Department of Transportation (SDOT) proposed improvements to the Burke-Gilman recreational trail through the Ballard neighborhood of Seattle. Between 2010 and 2011, HRA completed a cultural resources assessment of alternatives to assist SDOT in meeting compliance requirements of the National Environmental Policy Act (NEPA) and Section 106 of the National Historic Preservation Act (NHPA) regarding cultural resources.

Fremont Bridge Approach Replacements

HRA completed cultural resources investigations and mitigation for the proposed replacement of the approaches to the National Register-listed Fremont Bridge in Seattle, Washington.

Grand Teton National Park

HRA provided cultural resources services to the National Park Service (NPS) for the prescribed Matilda Fire, the Colter Bay Water Main Replacement, Moose Water/Wastewater projects, and Gros Ventre Stabilization. These four separate projects were located in Grand Teton National Park, Teton County, Wyoming.

Miller Ranch Wind Farm

HRA completed a cultural resources assessment of the Miller Ranch Wind Energy project near Goldendale, Washington.

NoaNet Fiber Optic Line, NE Route

In 2011, HRA conducted a reconnaissance-level archaeological survey in advance of installation of fiber-optic line for Tierra ROW and NoaNet.

Pacific Connector Pipeline

Between 2006 and 2012, HRA completed cultural resources investigations for the Pacific Connector Pipeline Project in Southern Oregon. Pacific Connector Gas Pipeline is proposing a 36-inch pipe to connect the proposed Jordan Cove Liquid Natural Gas facility near Coos Bay, Oregon, to Malin, Oregon, in Klamath County—a distance of 223 miles.

Seattle Public Utilities CSO Reduction

HRA conducted cultural resource studies and analysis of alternatives for Combined Sewer Overflow (CSO) Reduction projects in the Henderson, Genesee, Windermere, and Madison Park Basins along the west side of Lake Washington in the City of Seattle.

South Park Bridge Replacement

HRA conducted architectural and archaeological investigations for the proposed replacement of the South Park Bridge in King County, Washington.

Spokane River Hydroelectric Project

HRA worked with the Avista Corporation to produce a Historic Properties Management Plan for the Spokane River Hydroelectric Project in Northeast Washington and Northern Idaho.

U.S. Highway 12

HRA assisted the Washington State Department of Transportation with public involvement, NEPA/SEPA documentation, and cultural resources inventory and assessment for the US Highway 12 Four-Lane Project between Wallula and Walla Walla.

Yosemite National Park

Since 2006, HRA has contributed to archaeological and architectural studies in Yosemite National Park, including a data recovery in Yosemite Valley.

Cultural Resource Management

Facilitating Government-to-Government Consultation

HRA provides assistance and professional guidance to agencies and private clients in formal and informal tribal consultation and communication.


Through integration of GPS (Global Positioning System) and GIS (Geographic Information System) into our fieldwork and deliverables, HRA gathers and disseminates highly accurate…

Historic Preservation

HRA’s specialists assist clients with a range of historic preservation services, including preservation planning; adaptive reuse, rehabilitation, restoration and conservation…