Inside an ADX Florence Cell: Layout, Fixtures, and Daily Life

An ADX Florence cell is a poured-concrete room of roughly seven by twelve feet, about 84 square feet, with the bed, desk, and stool cast into the structure, a stainless steel sink-toilet unit on the wall, a private shower, and a narrow slit window angled at the sky. It sits behind a solid steel door with a second set of bars beyond it, and the inmate inside spends at least 22 hours a day there. As of March 2026, roughly 405 inmates live under these conditions at the United States Penitentiary, Administrative Maximum Facility, in Fremont County, Colorado.

Dimensions and Construction

The cell is small and seamless. Walls, floor, and ceiling are poured reinforced concrete, forming a single monolithic shell with no joints or hollow spaces to exploit. Drilling or chiseling through the surface is effectively impossible, and the design leaves nothing to pry loose.

The enclosure is layered. An inmate standing in the cell is bounded first by the concrete walls, and beyond those walls sit additional structural barriers before anything approaching the building’s outer perimeter. One former inmate described the arrangement as a boxcar: a concrete box with steel bars at the front, dead space past the bars, then another wall with a solid steel door. A breach of the inner wall leads to more wall, not to the outside.

Furniture Cast Into the Room

Nothing in the cell moves. The bed is a concrete slab raised off the floor with a thin mattress on top. The desk and stool are poured into the floor and wall as part of the same structure. Edges are rounded and every surface runs continuous with the one next to it.

Two problems disappear with this design. Furniture can’t be broken into weapons, and because the room is essentially one solid piece, there are no cavities to stash contraband. A cell inspection faces a static environment in which an inmate can hide only what fits in their hands.

Plumbing, Shower, and Television

Each cell has a stainless steel combination unit that puts the sink and toilet into one tamper-resistant fixture, bolted flush to the wall. Automated shut-offs limit water flow, so flooding the cell is prevented at the source.

The shower is inside the cell rather than down a corridor, which removes the security exposure of moving inmates to a communal area. Water flow is controlled and timed. In higher-privilege housing units, shower stalls sit on the range and inmates use them during out-of-cell time.¹

Inmates with clean disciplinary records may eventually receive a small black-and-white television and a radio, and general population cells typically include a television set. Programming is limited to religious, educational, and select general-interest content. Television is among the first privileges revoked for infractions. All electronic circuits run through a central staff station, so power to any single cell can be cut instantly.

The Door, the Window, and the Soundproofing

Entry is through a solid steel door with a small Plexiglas observation panel. Behind that outer door, a second barrier of vertical steel bars forms the front of the cell, creating a dead space between the two. Staff can watch the inmate through the bars and the window without opening either barrier. Meals pass through a narrow slot about the size of a shoebox, so trays go in without the door being unlocked.

Natural light comes from a single window roughly 42 inches tall and four inches wide. It is angled so an inmate sees the sky but not the ground, the surrounding terrain, or any other building. That rules out identifying one’s location in the complex, signaling to inmates in other cells, or mapping the facility’s layout. Artificial lighting is set from outside the cell and runs on the facility’s schedule.

The walls carry acoustic dampening designed to defeat the shouting and tapped codes that inmates in conventional prisons use to talk through walls. The isolation that defines ADX is engineered into the room itself.

What a Day Inside the Cell Looks Like

For inmates in general population, roughly 22 hours a day are spent locked in the cell, with up to two hours of out-of-cell time on weekdays. Recreation totals at least 10.5 hours per week, split between indoor and outdoor time.¹ For the most restricted inmates, outdoor recreation happens alone in a small enclosed area, often described as a concrete pit, where the only view is overhead sky.

Three meals a day come through the door slot. There is no communal dining, and inmates in general population eat alone in their cells every time. Phone contact is rationed: general population inmates get two 15-minute social calls per month. Inmates in the Control Unit or under Special Administrative Measures may have no phone access at all, or only monitored and recorded calls limited to immediate family.¹

Attorney visits take place in designated booths. A lawyer not already on the approved visiting list has to submit a written request to the Unit Team at least three business days in advance, with their bar number, state of licensing, date of birth, and social security number, and the Warden gives final approval. A request for a pass-through slot for documents has to be made up front. Inmates in H-Unit can only be visited on Mondays, Tuesdays, and Wednesdays, and no other inmate is allowed in the visiting room while an H-Unit inmate is there.²

How the Cell Experience Varies by Unit

Not every ADX cell carries the same restrictions. The facility has nine housing units across six security levels, and the unit assignment drives nearly every piece of daily life, from hours out of the cell to whether an inmate sees another face during the week.³

Range 13 is a four-cell wing inside the Special Housing Unit and the most isolated area in the facility. Few inmates are held there at any time.
The Control Unit, called Bravo, is the most secure full housing unit. Inmates are isolated at all times, including during recreation, and remain in their cells 23 to 24 hours a day.
The Special Security Unit, H-Unit, houses inmates under Special Administrative Measures, which sharply restrict communication with the outside world. Many are terrorism-related cases.
The Special Housing Unit, Charlie, handles intake for newly arrived inmates and overflow from the Control Unit, and serves as disciplinary housing.
General Population Units Delta, Echo, Fox, and Golf still keep inmates in their cells at least 22 hours a day but allow up to two hours of out-of-cell time on weekdays, television access, and two 15-minute phone calls a month.
The Step-Down Units, Joker and Step-Down Bravo, keep inmates confined most of the day but allow limited direct contact with other inmates as a bridge toward lower-security facilities.
Kilo Unit is the least restrictive and primarily houses high-profile inmates or those designated to ADX for their own protection because they would be targeted elsewhere.

Getting Out of the Cell: The Step-Down Program

ADX is not necessarily permanent. The Bureau of Prisons runs a step-down program that lets inmates work their way to less restrictive conditions and eventually transfer out, usually over about 36 months, though there is no fixed minimum or maximum.

The path has four phases. Inmates start in general population units D, E, F, or G, where they need at least 12 months of clean conduct. Those who qualify move to the Intermediate Unit (J/A) for a minimum of six months, which brings 20.5 hours of out-of-cell recreation per week, removal of restraints when out of the cell on the range, and up to five social visits per month. From there, inmates move to the Transitional Unit and then the Pre-Transfer Unit, both located at the adjacent U.S. Penitentiary in Florence rather than inside ADX itself. Pre-Transfer runs at least 12 months, after which the inmate may be designated to a less restrictive Bureau facility.¹

Advancing requires clear conduct, completion of recommended programming, respectful interactions with staff and other inmates, and consistent personal hygiene and cell sanitation. A single disciplinary infraction can reset the clock. For inmates whose behavior earned them placement at ADX in the first place, stringing three clean years together is a steep climb, and many remain in these cells well past the baseline timeline.

1
U.S. Department of State. Inmates of the Administrative Maximum United States Prison, Case No. 13.956 – Further Observations
2
Federal Bureau of Prisons. ADX Florence Visiting Procedures
3
District of Columbia Corrections Information Council. USP Florence Administrative Maximum Security ADX Inspection Report