top of page



Section 106 of the National Historic Preservation Act requires an assessment of impacts to all historic properties for projects with federal involvement. This so called "Class III" phase of this work typically involves teams of archaeologists walking the entire project area and recording identified archaeological sites and other cultural resources. Archaeological sites are then evaluated for significance according to legal criteria set out in the National Historic Preservation Act (NHPA) and National Register of Historic Places (NRHP). Additionally, ACR's geoarchaeologist evaluates the potential of subsurface archaeology within the project area and recommends subsurface testing where needed. 
random 2010 072-dehaze.jpg

Recording historic early oilfield forge feature.


Shovel testing a site in early spring weather.

random 2010 245-dehaze.jpg

Conducting backcountry survey in Bighorn Mountains of Wyoming

At ACR, we pride ourselves in our quick response time and tireless efforts in the field. A typical day conducting Class III survey involves hiking 8 to 10 miles per person, per day. We record and evaluate archeological and historic resources thoroughly and efficiently. Sites with subsurface potential are tested per SHPO and agency recommendations. Additionally, the subsurface archeological potential of each project area is assessed by a trained geoarcheologist. Based on our findings we make recommendations to the lead agency and clients regarding site eligibility, mitigation measures and possible solutions to allow project approval while protecting significant cultural sites.   


Recording historic habitation.


Conducting backcountry survey in Absarorka Mountains east of Yellowstone NP.

Contact us to find out how we can meet your Class III Archaeological survey needs

Background photo: rugged foothill terrain of Class III

survey project in north-central Wyoming.

bottom of page