▁IV ▁in m ates ▁located ▁in ▁Susan ville , ▁L assen ▁County , ▁California . ▁Open ed ▁in ▁ 1 9 9 5 , ▁it ▁has ▁a ▁capacity ▁of ▁ 2 , 3 2 4 ▁persons ; ▁in ▁May ▁ 2 0 1 7 ▁it ▁held ▁ 3 , 7 8 8 ▁in m ates . ▁ ▁Also ▁located ▁in ▁Susan ville ▁is ▁the ▁state ▁California ▁Cor re ction al ▁Center , ▁a ▁minimum - security ▁prison . ▁A ▁third ▁prison ▁facility , ▁the ▁Federal ▁Cor re ction al ▁Institution , ▁Her long , ▁is ▁also ▁located ▁within ▁L assen ▁County , ▁California . ▁Half ▁the ▁adult ▁population ▁of ▁Susan ville ▁works ▁at ▁these ▁pr isons . ▁The ▁pr isons ▁and ▁their ▁effects ▁on ▁the ▁community , ▁including ▁as ▁a ▁source ▁of ▁much ▁needed ▁jobs , ▁were ▁expl ored ▁in ▁the ▁document ary , ▁Pr ison ▁Town , ▁USA ▁( 2 0 0 7 ), ▁a ired ▁on ▁P BS . ▁ ▁Investig ation ▁ ▁In ▁late ▁ 2 0 1 5 ▁the ▁state ▁Office ▁of ▁the ▁Ins pect or ▁General ▁completed ▁a ▁six - month ▁investigation ▁into ▁conditions ▁at ▁the ▁prison , ▁after ▁compla ints ▁of ▁officer ▁mis con duct ▁and ▁prisoner ▁ab use , ▁and ▁issued ▁its ▁report , ▁calling ▁for ▁changes ▁at ▁the ▁facility . ▁Although ▁there ▁are ▁buildings ▁to ▁house ▁certain ▁in m ates ▁in ▁protect ive ▁cust ody , ▁such ▁as ▁sex ▁off enders , ▁officers ▁put ▁other ▁prisoners ▁near ▁them . ▁The ▁in m ates ▁are ▁mostly