This project report describes the methods used to organize, collect, and analyze and model data on 19 plant species having formal designation under the Endangered Species Act (ESA), or identified as of concern (i.e., “sensitive”) in the Colorado Plateau by collaborating Federal and state agencies, principally the Bureau of Land Management, Utah (BLM), the State of Utah Department of Natural Resources (UT-DNR), and the U.S. Fish and Wildlife Service (USFWS). The modelling domain for this project (Phase I) was restricted to the Colorado Plateau, as defined ecologically and spatially, and as used in the BLM’s Colorado Plateau Rapid Ecoregional Assessment1 (CP-REA) (Bryce et al. 2012).