United States Penitentiary, Florence ADX

E179845

United States federal government facility federal prison supermax prison

United States Penitentiary, Florence ADX is a federal supermax prison in Colorado known for housing some of the most dangerous and high-profile inmates in the United States under extremely restrictive conditions.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (10)

Label	Occurrences
Federal Correctional Complex, Florence	5
United States Penitentiary, Administrative Maximum Facility	3
Federal Correctional Institution, Florence	2
United States Penitentiary, Florence ADX canonical	2
United States Penitentiary, Florence High	2
Federal Correctional Institution Florence	1
Florence Federal Correctional Complex	1
United States Penitentiary Florence High	1
United States Penitentiary, Administrative Maximum Facility (ADX Florence)	1
United States Penitentiary, Administrative Maximum Facility, Florence	1

How this entity was disambiguated

This entity first appeared as the object of triple T1578898 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: United States Penitentiary, Florence ADX
Context triple: [Timothy McVeigh, heldAt, United States Penitentiary, Florence ADX]

A. Pelican Bay State Prison
Pelican Bay State Prison is a maximum-security California state prison known for housing some of the state's most dangerous inmates and for its controversial Security Housing Unit (SHU).
B. United States Penitentiary, Leavenworth
United States Penitentiary, Leavenworth is a historic federal prison in Kansas known for housing some of the most notorious American criminals of the 20th century.
C. Clinton Correctional Facility
Clinton Correctional Facility is a maximum-security state prison in Dannemora, New York, known for housing high-profile inmates and its long-standing role in the New York prison system.
D. Suitland Federal Center
Suitland Federal Center is a major U.S. federal office complex in Suitland, Maryland, that houses several government agencies and serves as a key hub for federal statistical and intelligence operations.
E. Lewisburg Federal Penitentiary
Lewisburg Federal Penitentiary is a high-security United States federal prison for male inmates located in Lewisburg, Pennsylvania.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: United States Penitentiary, Florence ADX
Target entity description: United States Penitentiary, Florence ADX is a federal supermax prison in Colorado known for housing some of the most dangerous and high-profile inmates in the United States under extremely restrictive conditions.

A. Pelican Bay State Prison
Pelican Bay State Prison is a maximum-security California state prison known for housing some of the state's most dangerous inmates and for its controversial Security Housing Unit (SHU).
B. United States Penitentiary, Leavenworth
United States Penitentiary, Leavenworth is a historic federal prison in Kansas known for housing some of the most notorious American criminals of the 20th century.
C. Clinton Correctional Facility
Clinton Correctional Facility is a maximum-security state prison in Dannemora, New York, known for housing high-profile inmates and its long-standing role in the New York prison system.
D. Suitland Federal Center
Suitland Federal Center is a major U.S. federal office complex in Suitland, Maryland, that houses several government agencies and serves as a key hub for federal statistical and intelligence operations.
E. Lewisburg Federal Penitentiary
Lewisburg Federal Penitentiary is a high-security United States federal prison for male inmates located in Lewisburg, Pennsylvania.
F. None of above. chosen

Statements (46)

Predicate	Object
instanceOf	United States federal government facility ⓘ federal prison ⓘ supermax prison ⓘ
alsoKnownAs	ADX Florence ⓘ USP Florence ADMAX ⓘ the Alcatraz of the Rockies ⓘ
cellConfinementTime	approximately 23 hours per day ⓘ
cellType	single-occupancy cells ⓘ
country	United States of America ⓘ
designedFor	high-risk inmates ⓘ inmates requiring the highest security level ⓘ long-term isolation ⓘ
hasFeature	extensive electronic surveillance ⓘ limited human contact ⓘ multiple security perimeters ⓘ reinforced concrete cells ⓘ remote location ⓘ secure exercise yards ⓘ
hasInmatePopulationType	adult inmates ⓘ federal inmates ⓘ male inmates ⓘ
jurisdiction	federal ⓘ
knownFor	extremely restrictive conditions of confinement ⓘ housing high-profile federal inmates ⓘ housing inmates convicted of espionage ⓘ housing inmates convicted of organized crime offenses ⓘ housing inmates convicted of terrorism-related offenses ⓘ housing inmates convicted of violent crimes ⓘ
locatedIn	Florence, Colorado ⓘ
location	Fremont County, Colorado ⓘ
managedBy	United States Department of Justice ⓘ
notableCharacteristic	highest security federal prison in the United States ⓘ symbol of the U.S. supermax prison model ⓘ
opened	1994 ⓘ
operator	Federal Bureau of Prisons ⓘ
partOf	Federal Correctional Complex, Florence ⓘ linked to: United States Penitentiary, Florence ADX United States federal prison system ⓘ
purpose	to confine inmates deemed the most dangerous in the federal system ⓘ to prevent inmate attacks on staff ⓘ to prevent inmate escape ⓘ to prevent inmate-on-inmate violence ⓘ
regardedAs	one of the most secure prisons in the world ⓘ
securityClassification	supermax ⓘ
status	operational ⓘ
subjectTo	Federal Bureau of Prisons regulations ⓘ United States federal law ⓘ

How these facts were elicited