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Idaho Maximum Security Institution (IMSI)

13400 S. Pleasant Valley Rd
Idaho
Male prison
(208) 338-1635
Kuna
Opened in 1989
Prison Description

IMSI opened in November 1989 to confine Idaho's most disruptive male inmates. It has a capacity of 549 inmates and located within a double perimeter fence reinforced with razor wire and an electronic detection system.  The population is primarily comprised of close custody and administrative segregation inmates. IMSI also operates the state Secure Mental Health Facility, houses inmates under the sentence of death, and inmates who are civil commitments. 

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