Donald Keller Museum of Northern Arizona No description specified. 1-1 (1 Record) Documents Archaeological Investigations: Salt River Project, Coronado-Silverking Transmission Line 500kV and 230kV Corridor Segment from Silverking Substation West to Tonto National Forest Boundary, Federal (Tonto National Forest) and Private Lands, Pinal County, Arizona: Final Report for Archaeological Clearance Survey of 14.8 mi of Extra High Voltage Transmission Line Corridor, 2.0 mi of Substation Access Road, and 0.9 mi of 115kV Transmission Line Alignment, Silverking Substation Area, Tonto National Forest (1978)