New Jerusalem

Most of Salt Lake City and Ogden, Utah, were destroyed in the Great War in 2077. When Vault 70 opened in 2190, the residents used their three G.E.C.K.s to found the city of New Jerusalem, based within the ruins of Salt Lake City.

New Jerusalem's intolerant prophet and apostles repeatedly voted to have no commerce with outsiders from other, failed communities, refugees, or tribals. In 2233, a number of angry tribals, raiders, and disassociated attackers ganged up on New Jerusalem and sacked it, killing most of the Mormons in the process.

The new living prophet, Judah Black, led most of the surviving remnants of the Mormon community north to Ogden, Utah, where they established the town of New Canaan.

According to the Burham Springs design document, Salt Lake City is unsuitable for the NCR outpost, as is Burham Springs, affected by constant fire.