Marriott and Slaterville were unincorporated pioneer settlements in Weber County until the late 1990s. Initially, the citizens of Marriott and Slaterville voted to create Marriott Township and Slaterville Township under the jurisdiction of Weber County. Annexation concerns grew from the closure of Defense Depot Ogden. Then the state legislature suddenly stripped away township border protection, so, in 1998, residents of the two townships voted overwhelmingly to merge together. Marriott-Slaterville City was officially incorporated on July 1, 1999.
While doing the Adventure Lab you will find the coordinates to this bonus cache.
Congratulations to Teacherspet2 for being first-to-find on this cache.