Prisoners from Juab County were first held in the basement of the Social Hall at the corner of Center Street and Second East in Nephi, and a later jail was a red frame building of thick heavy planks located directly south and west of the old courthouse. The Juab County Jail was built in 1892 in the Territory of Utah, four years before Utah became a state, after the construction contract was awarded on July 13, 1892, to the Pauley Jail Building and Manufacturing Company of St. Louis, Missouri, for $8,916. Located adjacent to the county courthouse in Nephi, this two-story brick building with a sandstone foundation and hip roof served as a territorial jail until statehood in 1896 and remained the county's principal jail until March 1974, when the Tri-county Detention Center opened in Nephi. Its iron cages and heavy metal interior ceiling, together with its largely intact interior, make it one of the largest and best-preserved late nineteenth-century jails remaining in Utah. The building shows typical Late Victorian detailing, including brick segmental arches over the windows and doors and a band of corbelled brick below the eaves. Its only significant alteration was the circa 1915 addition of a concrete basement-level heating plant and a large brick chimney on the north side, whose cast-concrete top reflects the Prairie School style. Through the years, occupants knew sorrow, repentance, remorse, bitterness, and revenge, and the old jail served the purpose for which it was constructed. The complex also includes part of the old Juab County Courthouse and a pioneer implement building known as the Brough Building, where pioneer memorabilia are kept and displayed.