AZ Yucca Ash 2

Tierra recently conducted a 1,296-acre cultural resources survey for the Bureau of Land Management (BLM) within the Yucca Ash Clearance Area of the Las Cienegas National Conservation Area (LCNCA) in Santa Cruz County, Arizona. Mesquite, its growth encouraged by cattle grazing, has invaded much of the grasslands of the LCNCA, and the BLM has undertaken a series of projects to eradicate the species.


AZ Yucca AshDuring the project, mesquite trees will be mechanically grubbed out of the ground using a backhoe or similar heavy equipment. Tierra’s survey was conducted to identify and record any culturally significant properties in the proposed project area before any ground-disturbing activities occurred. 

During the survey, Tierra’s four-person crew investigated 9 early twentieth-century historic sites and 5 prehistoric sites dating from the Middle Archaic to pre-Classic Hohokam periods; 69 isolated occurrences were also documented. Tierra’s archaeologists produced a draft report on the survey and its results just over a month after completing fieldwork.