U.S. Constitution · Amendment XIII · Section 1 · 1865

“Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States…”[s13]

How did America build its prisons, and who pays?

The story of mass incarceration from 1865 to today, told through real places, real records and Colorado, where seven state prisons ring one small town.

The 13th Amendment, 1865.
The 13th Amendment, 1865. U.S. National Archives · Public domain

The scale, in three numbers

Then and now

≈2 million

People locked up in the United States on a given day, counting prisons, jails and other facilities (2025).[ppi][bjs23]

11×

Growth of Colorado's prison population, from 2,066 people in 1970 to a peak of 23,274 in 2008.[vera][bjs08]

7

State prisons in and around Cañon City, Colorado, the oldest built in 1871, before statehood.[csp][c1prison]

Colorado · People in state prison, 1970–2024

Colorado state prison population, 1970 to 2024About 2,000 people in the early 1970s, rising steeply after 1986 to a peak of 23,274 in 2008, then 17,376 in 2024 (CDOC counted 17,485 at year end).

Colorado's population grew too, but prisons grew faster: per 100,000 residents aged 15 to 64, the rate went from 148 in 1970 to 690 in 2008.[vera] Data: Vera Institute of Justice, Incarceration Trends (from Bureau of Justice Statistics and state sources). Checked against BJS for 2008 and CDOC for 2024 (CDOC counted 17,485 at year end).[bjs08][cdoc24dec]

Show the numbers as a table

The Story · 1865 to 2026

One clause, 160 years

Each record is a short read, a real place and the document that proves it. Tap a source number to see where every fact comes from.

  1. 1865U.S. Const. amend. XIII

    Slavery ends, with an exception

    The 13th Amendment abolishes slavery and involuntary servitude “except as a punishment for crime.” Georgia's vote completes ratification on December 6, 1865.[s13][w13]

    That exception is the door the rest of this story walks through.

    Place: National Archives, Washington, D.C.

  2. 1865–67Black Codes

    Laws written to arrest freedom

    Southern legislatures pass Black Codes, starting with Mississippi. Vagrancy laws make it a crime for a Black man to be without work that white employers approve of.[black]

    Eight of the nine Southern states that rewrote their vagrancy laws in 1865–66 also allowed convict leasing: the state rented prisoners out as laborers, which gave officials a reason to arrest Black men.[black]

    Florida prisoners leased to harvest timber, c. 1903.
    Florida prisoners leased to harvest timber, c. 1903. Detroit Publishing Co. / Library of Congress · Public domain
  3. 1910Convict leasing ends in Texas

    Leasing ends. The labor does not.

    In Sugar Land, Texas, the state leased prisoners to work the sugar plantations until 1910, when the practice was outlawed.[archaeology]

    Prison farms carried the work forward. In 1900–1901 Mississippi bought the 3,789-acre Parchman Plantation for a prison; most men worked the fields ten hours a day, six days a week.[parchman] Louisiana's Angola prison covers about 18,000 acres of a former plantation, named for the African country many enslaved people came from.[angola]

    Places: Sugar Land, TX · Parchman, MS · Angola, LA

    Men hoeing a field at Parchman Penal Farm, Mississippi, 1911.
    Men hoeing a field at Parchman Penal Farm, Mississippi, 1911. Mississippi Department of Archives and History · Public domain
  4. 1971June 17 · White House

    “Public enemy number one”

    On June 17, 1971, in the White House briefing room, President Richard Nixon tells reporters:

    “America's public enemy number one in the United States is drug abuse.”[nixon]

    The war on drugs begins. Read the Drug War chapter.

    White House contact sheet: President Nixon meets Congressional leaders on drug abuse, Cabinet Room, June 17, 1971.
    White House contact sheet: President Nixon meets Congressional leaders on drug abuse, Cabinet Room, June 17, 1971. Oliver Atkins, White House Photo Office / Nixon Library · Public domain
  5. 1986Pub. L. 99-570

    The 100-to-1 rule

    The Anti-Drug Abuse Act brings back mandatory minimums. Five grams of crack cocaine, or 500 grams of powder, means at least five years in federal prison.[adaa]

    In Colorado that year, 3,804 people were in state prison. Eight years later, 10,717.[vera]

    Ronald and Nancy Reagan at the signing of the Anti-Drug Abuse Act, East Room, October 27, 1986.
    Ronald and Nancy Reagan at the signing of the Anti-Drug Abuse Act, East Room, October 27, 1986. White House Photographic Office / Reagan Library · Public domain
  6. 1994Pub. L. 103-322

    The crime bill

    President Bill Clinton signs the Violent Crime Control and Law Enforcement Act. The Senate version was drafted by Joe Biden. It sends $9.7 billion to prisons, offers states grants if people serve 85% of their sentences (“truth in sentencing”), and creates a federal three-strikes law.[crime94][doj94]

    Sen. Joe Biden speaks at the 1994 crime bill signing as Attorney General Janet Reno and President Bill Clinton look on.
    Sen. Joe Biden speaks at the 1994 crime bill signing as Attorney General Janet Reno and President Bill Clinton look on. Office of Senator Joe Biden · Public domain
  7. 1990s–2000sThe building boom

    Prisons come to rural towns

    Colorado's prison population triples between 1990 and 2008, from 7,671 to 23,274.[vera] The federal prison complex at Florence, including the supermax, opens in 1995 in Fremont County.[adx] A private prison opens in Huerfano County in 1997.[vera]

    Read the Prison Towns chapter.

    Arkansas Valley Correctional Facility, near Ordway, Colorado, 2017.
    Arkansas Valley Correctional Facility, near Ordway, Colorado, 2017. Jeffrey Beall, via Wikimedia Commons · CC BY 4.0
  8. 2010Pub. L. 111-220

    The gap narrows, but stays

    President Barack Obama signs the Fair Sentencing Act on August 3, 2010. It cuts the crack-to-powder gap from 100-to-1 to 18-to-1.[fsa][ussc15]

  9. 2018Sugar Land 95

    The Sugar Land 95

    On land the Fort Bend school district bought from the old prison, archaeologists uncover an unmarked cemetery: the remains of 95 people. They date them to the late 1800s and early 1900s and link them to African American prisoners forced to work the plantation.[archaeology]

    Place: Sugar Land, Texas

  10. 2026Sept 22 · Austin, TX

    A judge orders Texas to cool its prisons

    Federal Judge Robert Pitman orders Texas to air-condition all of its state prisons by the end of 2029. About 90,000 people, roughly two-thirds of the state's prisoners, live in units without air conditioning. The state says it will appeal.[tpr]

    Read the Heat Inside chapter.

    The brick walls of the Huntsville Unit, Huntsville, Texas, 2008.
    The brick walls of the Huntsville Unit, Huntsville, Texas, 2008. Mark Britain, via Wikimedia Commons · CC BY-SA 2.0

The boom, state by state · 1970–2024

Watch the map fill in

Each state gets darker as more of its people are in state prison. Press play to watch 1970 turn into today, or drag the slider to any year.

The number is people in state prison for every 100,000 residents aged 15 to 64.[vera]

1970
Colorado–
Highest state (separate prison systems)–
Median state–
Rate per 100,00005001,0001,500+

Hover or tap a state.

Connecticut, Delaware, Rhode Island and Vermont (and Alaska and Hawaii, not shown) run combined jail and prison systems, so their rates include people held before trial.[vera]

The Map

The places that prove it

Tap a place to read what happened there, then see it in 3D from real satellite imagery.

Colorado placesNational story placesColorado

    Coming next on the map: every U.S. prison as a dot, a 1970-to-today slider that shows the boom year by year, heat and toxic-site layers, and 3D fly-ins to Sugar Land, Angola and a Colorado prison town.

    By Design · Where people come from

    Conditions are built

    “The government doesn’t know who’s gonna do what, but they can create conditions via policy that create certain outcomes.”

    Michael Clifton

    Most people understand that a city can gentrify a neighborhood on purpose: change the zoning, steer the money, build the park. Fewer see that the neighborhoods prisons fill up from were shaped the same way, by maps, highways, housing and school decisions made decades ago. No one decided who would do what. The policies decided the odds.

    Pick a lever below, then flip the switch to see the same lever run the other way.

    Where Colorado's prisoners come from: imprisonment per 100,000 residents, 2020

    Drawn to scale. Dark bars: neighborhoods redlined in 1938 that never gentrified.[ppico][cpr22][denverite16]

    The policy creates

    Which raises the odds of

    In Denver and beyond

    Where you grow up

    Researchers tracked millions of children into adulthood. On a single day in 2010, 21% of Black men who grew up in the lowest-income families were incarcerated, far higher than any other group; Black boys who moved to better neighborhoods as children were less likely to be.[chetty20] Neighborhood by neighborhood the gap is stark: over 40% for low-income Black men who grew up in Watts, 6% next door in Compton.[censusoa]

    The rose from concrete

    Hard places still raise artists, organizers, scholars and leaders, people who turn out the opposite of what the conditions predicted. They are real, and they are the exception. A design is judged by what it usually produces.

    • 16Denver areas graded D (“hazardous”) in 1938[mi]
    • 2.6°CHow much hotter redlined areas run today, across 108 cities; Denver's gap is among the largest[hoffman][vamerc]
    • 20×Sun Valley's imprisonment rate vs. Washington Park West[ppico][cpr22]
    • 21%Black men from the lowest-income families incarcerated on a given day in 2010, in their early 30s[chetty20]

    Prison Towns · Fremont County, Colorado

    Cañon City

    Colorado had a prison before it was a state. The territorial penitentiary in Cañon City was built in 1871 and became a state prison in 1876. It still runs today as the Colorado Territorial Correctional Facility, the oldest prison in the state system.[ctcf] It started with three prisoners.[lifelaw]

    Today seven state prisons stand in and around Cañon City.[csp][c1prison] Also in Fremont County, near Florence, sits the Federal Correctional Complex, home of the federal supermax, opened in 1995.[adx]

    A town that runs on prisons

    In 2013 reporting, the state corrections department and the federal Bureau of Prisons were the area's largest and best-paying employers. A new state correctional officer started at $32,000, in a county where income per person was about $17,400.[lifelaw]

    When the prison leaves

    In Huerfano County, a private prison built in 1997 and run by Corrections Corporation of America closed in 2010. The state denied a 2018 request to reopen it.[vera]

    Question for the reader: what does a town owe the people inside its walls, and what does it owe its own workers?

    The former Colorado Women's Prison in Cañon City, now a museum, 2012.
    The former Colorado Women's Prison in Cañon City, now a museum, 2012. Jeffrey Beall, via Wikimedia Commons · CC BY-SA 3.0
    • 1871Territorial prison built in Cañon City[ctcf]
    • 7State prisons in and around town[csp][c1prison]
    • 1995Federal complex at Florence opens[adx]
    • $32,000Starting pay, state correctional officer (2013)[lifelaw]

    Built on Bad Land · Where prisons go

    Far from town, near the waste

    Where a prison is built decides what the people inside breathe, drink and live through. During the boom, prisons went where land was cheap and towns wanted jobs.

    The rural boom

    Before 1980, 36% of prisons were in rural areas. In the 1990s, 245 prisons opened in rural America, about one every 15 days.[huling] The number of U.S. prisons grew from 511 in 1970 to 1,663 in 2000, mostly in rural places that were often looking for an economic lifeline.[eason]

    Next to toxic sites

    A 2016 mapping found 589 federal and state prisons within 3 miles of a Superfund cleanup site, and 134 within 1 mile.[pep][gejp] In Michigan, two prisons holding more than 3,500 people sit about 1.5 miles from the Velsicol chemical Superfund site, where water was contaminated.[bradshaw]

    In Colorado

    About 2 miles south of Cañon City is the Lincoln Park / Cotter Uranium Mill Superfund site, listed in 1984 for uranium, molybdenum and TCE contamination.[cdphe] Across the state, 11 of 43 state and federal prisons have a Superfund site within 5 km (about 3 miles), including the Colorado Territorial Correctional Facility in Cañon City.[mh]

    Explore every prison's hazards in the Research Hub →

    • 36%Prisons in rural areas before 1980[huling]
    • 245Rural prisons opened in the 1990s[huling]
    • 589Prisons within 3 miles of a Superfund site (2016)[pep][gejp]
    • 130Of 1,865 state and federal prisons with a Superfund site within 5 km (2022 data)[mh]
    • 11 of 43Colorado prisons with a Superfund site within 5 km[mh]

    The Drug War · 1971 to 2010

    Five grams, five years

    Nixon named drug abuse “public enemy number one” on June 17, 1971.[nixon] Fifteen years later, Congress wrote the fear into sentencing law.

    Under the 1986 Anti-Drug Abuse Act, 5 grams of crack cocaine triggered the same five-year mandatory minimum as 500 grams of powder cocaine. Same drug, different form, one hundred times the weight.[adaa]

    In 2010 the Fair Sentencing Act cut the gap to 18-to-1. It did not end it.[fsa][ussc15]

    Who is inside, in Colorado

    In 2022, Colorado held Black residents in state prison at about 1,563 per 100,000 people aged 15 to 64, and white residents at about 302 per 100,000: more than five times the rate.[vera]

    Amount that triggered a 5-year minimum, 1986 law

    Bars drawn to scale. Five grams is about the weight of a nickel coin.[nickel]

    Control and Profit · Who gains

    Always about control

    “I don’t think there was ever a time where the intent was from a good place. It has always been about control. I think it’s gotten worse over time in how it shows up.”

    Michael Clifton, founder, who spent 24½ years in Colorado prisons

    Control, from the start

    When slavery ended, the 13th Amendment left one door open: “except as a punishment for crime.”[s13] Southern states passed Black Codes that applied only to Black people and turned things like vagrancy, or not being able to prove you had a job, into crimes. States then leased prisoners to railways, mines and plantations, a practice that lasted into the 1930s.[eji] People who could no longer be owned could be convicted.

    Fear makes the law

    Harsher laws often followed one terrible case. After 12-year-old Polly Klaas was kidnapped and murdered in 1993, California passed “three strikes”; under it, a man got 25 years to life for stealing three golf clubs.[ewing] President Clinton named her when he signed the 1994 crime bill, which then-Senator Joe Biden largely wrote and shepherded through Congress.[clinton94][fc94] It authorized $9.7 billion for state prisons.[crime94][doj94] Researchers say the bill did not start mass incarceration, which began in the 1970s, but added to it.[pf94]

    Colorado followed the same path. A 1985 law doubled the top of the sentencing ranges, and the prison population more than doubled, from 3,586 in 1985 to 7,794 in 1991.[cdoc92] After the 1993 “Summer of Violence,” a special session let prosecutors send 14- to 17-year-olds straight to adult court and created the Youthful Offender System.[ojjdp93][yos93] Homicides that year rose by two over 1992.[m5280]

    Worse over time: death by incarceration

    In Colorado, a life sentence once meant parole review after 10 years. The wait rose to 20 years in 1977 and 40 years in 1985. Since July 1, 1990, life for a class 1 felony has meant no parole at all.[pln00][crs17][hb1203] Many people serving these sentences call them “death by incarceration.”[alc]

    Nationally, 194,803 people were serving life or 50 years or more in 2024, about 1 in 6 people in prison; life without parole hit a record 56,245.[tsp25] In Colorado the share is higher: 3,642 people, 21% of the prison population.[tsp25] From 1990 to 2006, Colorado also sentenced children to life without parole; 48 people were serving those sentences when the state changed the law in 2016.[cbs16] In 2024, 46 people died in Colorado prison custody, and one in five people inside was over 50.[cdoc24]

    Here is how that control shows up today: who works, who pays, and who is paid.

    Work, by rule

    In 2018, Colorado voters struck the same “punishment for crime” exception from the state constitution with 66.2% of the vote.[amA][bpamA] Prison rules still required eligible people to work, and reporters found at least 727 disciplinary cases for refusing work in the years after the vote.[bolts23]

    In a class-action case, the Department of Corrections agreed there had been more than 10,000 failure-to-work incidents in four years. On February 13, 2026, a Denver judge ordered the state to stop threatening isolation to make people work.[pln26][bolts26]

    Pennies a day

    Colorado's 2017 pay scale ran from 84 cents to $2.45 a day for full-time prison jobs.[ppiwage] Colorado Correctional Industries, the state's prison business, took in $26.4 million in 2024 making license plates, signs, uniforms, flags and more.[cci24] Nationally, about 800,000 incarcerated workers earn an average of 13 to 52 cents an hour and produce more than $2 billion a year in goods.[aclu22]

    Families pay

    Until 2023, Colorado families paid 8 cents a minute for prison phone calls; a 2023 law made calls free by July 2025.[hb1133] The prison canteen sold $22.5 million in goods in 2025.[canteen25] Medical visits still cost $3 to $5; a 2025 bill to end those copays passed the legislature and was vetoed.[hb1026][veto25]

    Beds as business

    CoreCivic, a private prison company, runs Bent County and Crowley County for the state at $66.52 per person per day.[kiowa26] In 2013, Colorado guaranteed the company 3,300 prisoners while state prisons had about 1,000 empty beds.[kunc13] In 2026, budget writers chose a new private contract, about $115 per person per day for about 700 people, over state-run options.[sun26] CoreCivic reported $2.21 billion in revenue for 2025.[cxw25]

    Built for control

    Colorado State Penitentiary opened in 1993 for administrative segregation, about 23 hours a day in a cell.[csp][c1prison] A second solitary prison cost $208 million, opened in 2010, and was emptied two years later.[csp2] In 2017 the state capped solitary at 15 days in a row.[den17]

    Does it make us safer?

    The National Research Council found the deterrent effect of longer sentences “modest at best.”[nrc14] The National Institute of Justice: “The certainty of being caught is a vastly more powerful deterrent than the punishment.”[nij16] In Colorado, incarceration rose 19% after 2021 while crime fell, and a state audit update counted 4,627 people held past their parole eligibility date as of October 31, 2025.[kunc26][cdocaud]

    Invest instead

    A year in a Colorado prison costs about $57,000, nearly five times the $11,900 a year in state and local school funding per student.[cpo23][sf26] Money spent in neighborhoods has measurable effects. In Philadelphia, cleaning and greening vacant lots cut gun violence by up to 29% in poor neighborhoods.[branas] In Chicago, a summer jobs program cut violent-crime arrests among teens by up to 43%.[heller] Across 264 cities, more local nonprofits went with less violent crime.[sharkey] Colorado has tried this on a small scale: a 2017 law moved $6.6 million from the prison budget into small-business loans and crime-prevention grants in north Aurora and southeast Colorado Springs.[hb1326]

    “If we invested that more in our communities and our people and our youth, we would have healthier communities that would need less prisons.”

    Michael Clifton

    What a day costs, and what a day pays

    Bars drawn to scale. Cost and rate figures count different things, so compare them with care.[cpo23][kiowa26][ppiwage]

    • 66.2%Colorado vote to remove the slavery exception, 2018[amA][bpamA]
    • 10,000+Failure-to-work incidents in four years, agreed in court[pln26]
    • 16%Of Colorado's prison population held in private prisons, 2022[sp22][cdoc22dec]
    • $445BYearly U.S. cost of mass incarceration, at least, by the Prison Policy Initiative's 2026 estimate[ppi26]

    How long a life sentence lasts in Colorado: years before parole review

    Class 1 felonies (first-degree murder). Drawn to scale.[pln00][crs17][hb1203]

    Question for the reader: if prisons were only about safety, who would lose money?

    Heat Inside · Environmental justice

    85 to stay alive

    The 85 to Stay Alive campaign, led by Texas Prisons Community Advocates, asks for an indoor temperature standard of 65 to 85°F in prisons, the same range Texas already requires in county jails. It also calls for air conditioning in every housing, work and common area, and for free cold water during extreme heat.[tpca85][tpr24]

    The campaign now has a national coalition with state partners, including Colorado.[tpcanat] In Colorado, TPCA works with CU Boulder's RISE program; together they built an exhibit that includes recordings of incarcerated Americans describing extreme heat.[tpcaco]

    Colorado is not immune

    CIRCol (the Climate and Incarceration Research Collective, pronounced “Circle”) is a national research collective that works with directly impacted communities on the environmental harms people face inside (climateandincarceration.org ↗). Its director is at CU Boulder, and its core leadership spans CU Boulder, CU Anschutz, UCLA, the University of Arizona, Texas Prisons Community Advocates and FreeWorld, including members with lived experience.[circol] In Colorado, researchers at CU Anschutz and CU Boulder are studying heat and cold inside together, with formerly incarcerated people on the team (see the Colorado study). Its researchers mapped 110 Colorado lockups for exposure to wildfire, flood, extreme temperatures and landslides. Three in four had moderate or high exposure to at least one hazard, and those facilities hold about 33,300 people, 83% of everyone incarcerated in the state.[cuheat][kunc23]

    In interviews with 35 formerly incarcerated Coloradans, about 65% said extreme temperatures, wildfire or flooding had affected them inside. People described long stretches above 90°F, and filing complaints that were dismissed over small errors, with fear of losing privileges or being transferred.[cuheat] Black and Latino people were more exposed, because of where their facilities are.[cuheat]

    Texas, September 2026

    A federal judge found that Texas's heat measures “have not prevented ongoing deaths and heat-related injuries,” and ordered air conditioning in every state prison by the end of 2029.[tpr]

    Ellis Unit, Texas, 2009.
    Ellis Unit, Texas, 2009. Timo Ala-Rami, via Wikimedia Commons · CC BY 2.0
    The standard asked for65–85°F

    Indoor range, 85 to Stay Alive[tpca85][tpr24]

    Reported in Colorado90°F+

    Long stretches, per formerly incarcerated people interviewed[cuheat]

    Texas, without AC~89,000

    About 88,700 people in housing without air conditioning, 2026[tpr][fox4tx]

    Voices · Told by the people who lived it

    Stories come with consent

    This is the part no data site has. Stories will appear here only when the person telling them has signed a release. Until then, this space stays empty on purpose.

    Coming first: “Why I built this,” from the founder, in his own words and voice. Then short stories about heat, water and health inside from coalition members who choose to share.

    Take Action

    What you can do this week

    Back a temperature standard

    Sign the national 85 to Stay Alive petition and send the action letter asking for humane temperatures in U.S. prisons.

    National coalition →

    Follow the Colorado work

    Follow CIRCol, the national Climate and Incarceration Research Collective (CIRCol ↗), the CU Anschutz and CU Boulder Colorado study, and the 85 to Stay Alive Colorado coalition page.

    Colorado coalition →

    Look up your own county

    See how jail and prison numbers changed where you live since 1970, using the free Vera Institute data.

    Incarceration Trends →

    Sources

    Every fact, linked

    Each mark like [vera] in the text points here. Facts were checked against these sources on October 18, 2026.

      Photo credits