The Trust Lands memo relays Valar's statement that no Quaternary-active faults lie within the site and that the nearest are the Pleasant Valley fault zone about 20 miles north-west and faults in the Price River area (mine-016). A query of the Utah Geological Survey's Quaternary fault layer on 29 September 2026 found no mapped Quaternary fault within 10 km of the center of Sec. 16; the nearest is 'Price River Area faults' at about 23 km (age under 2.6 million years, slip under 0.2 mm a year), then strands of the Pleasant Valley fault zone from about 37 km (about 23 miles) and the Joes Valley fault zone at about 45 km, one strand of which is mapped as younger than 15,000 years. The company's 'low-seismicity zone' description was not tested here.

• Utah Quaternary Faults (Hazards/quaternary_faults MapServer, distance queries) (Utah Geological Survey) primary government
• 8.20.2026 TLA Board Packet (Discussion Item 9A: SULA 2095 OBA, Board Meeting Discussion Memorandum) (Utah Trust Lands Administration (Utah Public Notice Website), 2026-08-20) primary government “No Quaternary-active faults exist within the site boundary.”