ERO conducted an intensive Class III inventory of 1,553 acres proposed for fuel-reduction activities to mitigate the potential effects of wildland fire in Washington and Iron counties, Utah (in the remote northwestern portion of Zion National Park). Field crews conducted a pedestrian survey, and documented all previous and newly discovered cultural resources. The inventory resulted in documentation of 25 new archaeological sites. Site types included upland hunting and gathering camps. Documented periods included the Archaic and probable Paiute and Virgin Anasazi sites.

ERO assisted the NRCS and private landowners with Section 106 compliance by completing a 4,500-acre survey of four private ranches in Lincoln and Socorro counties, New Mexico. ERO completed a Class III inventory of the areas proposed for brush management. Cultural resource sites were identified, documented to NRCS and New Mexico standards, and each received a recommendation of National Register eligibility. Identified cultural resource sites belonged to the northern Jornada Mogollon culture, the Archaic period, and historic homesteads.

ERO conducted an inventory in Benson and Ramsey counties, North Dakota. The project involved improvements to existing roads-acting-as-dams. The Federal Highway Administration (FHWA) retained ERO to complete a Class III intensive pedestrian survey. Consulting parties were the FHWA, Bureau of Indian Affairs, North Dakota Department of Transportation, the U.S. Army Corps of Engineers, and the Spirit Lake Nation. About 250 acres were inventoried either as linear or block survey areas. The most significant documented site contained two historic-period graves. Shovel testing was conducted in areas of high site potential and heavy ground vegetation.

ERO conducted a Class II inventory of 3,500 acres in Douglas County proposed for residential development and a golf course. ERO developed a survey strategy that effectively sampled the 3,500 acres. The survey documented 24 archaeological sites including prehistoric lithic scatters and historic sites representing homesteading and Civilian Conservation Corps (CCC) activities. Notable was an extensive CCC water-control complex that constitutes one of the best remaining CCC work projects in the region. ERO continues to assist the client with archaeological testing, monitoring, and controlled collection to mitigate for adverse effects.

ERO Resources conducted a Class III cultural resource inventory of three proposed Delta Petroleum well pad locations and associated access roads and pipelines in 2005 in order to facilitate Delta's compliance with Section 106 of the National Historic Preservation Act (1966, as amended). In 2006, we conducted a similar cultural resource inventory of approximately 130 acres of three additional proposed well pads, associated access roads, and pipeline corridors for the Vega Field Environmental Assessment (EA). The project is located in Mesa County, Colorado, east of Vega Reservoir and on land administered by the Bureau of Land Management's Grand Junction Field Office .

ERO's tasks included a Class I file and literature review of the project area; a Class III pedestrian survey of proposed project facilities, including a 40-acre buffer area for all well pad footprints; and determinations of eligibility for the National Register of Historic Places.