Navajo Tribal Utility Authority, Ft. Defiance, AZ No description specified. 1-2 (2 Records) Documents Archaeological Survey of a Short Power Line Extension North of Red Mesa in Utah (1988) Archaeological Survey of the Proposed White Mesa Power Lines (Ntua No. 11-620-2278.1) for Navajo Tribal Utility Authority in San Juan County, and Montezuma County, Utah (1987)