East Granby in Capitol Region, Connecticut — The American Northeast (New England)
Old Newgate Prison & Copper Mine
| | Old New-Gate Prison & Copper Mine | |
Copper Mine
Old New-Gate is the site of the first chartered copper mine in the North American colonies; it is a historic and physical representation of the type of commercial business that colonists needed to establish to reduce dependency on England. When the mining operation began in 1707, English law prohibited colonial mine owners from smelting copper ore (extracting copper from the rock). Instead, they were forced to ship the unprocessed ore across the Atlantic. It was a costly endeavor that slashed their profits. Over time, the costs of running the mine exceeded the revenue being generated. By the 1750s, the majority of the mining operations had ceased.
Prison
The property lay idle until 1773 when the General Assembly of colonial Connecticut voted to convert the abandoned copper mine to a secure and profitable prison, using incarceration as an alternative to fines or physical punishment such as the stocks or pillory. Prisoners were locked in the underground tunnels of the mine. Some served out their terms; many managed to escape. During the American Revolution, opponents of American independence (Loyalists) and deserters from George Washington's army also faced imprisonment here. Changes in criminal laws, especially after the turn of the 19th century, caused the prison's population to grow substantially and critics accused New-Gate of being both cruel and costly. In 1827, the state closed New-Gate Prison and moved the imprisoned men and women to a new state prison in Wethersfield, Connecticut.
Tourist Attraction
From 1830 to 1857, the Phoenix Mining Company attempted to revive the mining operation. When the endeavor failed, the site became a popular tourist attraction. Private marketing efforts focused on New-Gate's dark history while also providing numerous unrelated curiosities. The site became celebrated for its horrid dungeon, Saturday night dances, zoo animals, and more. When the state purchased the site in 1968, it purged all artifacts unrelated to the history of the prison; going forward Old New-Gate would operate as a prison museum.
Erected by Connecticut Department of Economic and Community Development.
Topics. This historical marker is listed in these topic lists: Industry & Commerce • Law Enforcement. A significant historical year for this entry is 1707.
Location. 41° 57.73′ N, 72° 44.703′ W. Marker is in East Granby in Capitol Region, Connecticut. It can be reached from Newgate Road 0.3 miles north of Valley View Drive, on the left when traveling north. Located at the Old New-Gate Prison & Copper Mine. Touch for map. Marker is at or near this postal address: 115 Newgate Road, East Granby CT 06026, United States of America. Touch for directions.
Regionally, this marker is in the Connecticut River Valley, in Greater Hartford, and in the Knowledge Corridor. It is also in the American Northeast and in New England. Globally, it is in North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once Hartford County and also one of the original Thirteen Colonies.
Other nearby markers. At least 8 other markers are within walking distance of this marker: Mining Copper (here, next to this marker); If Walls Could Talk (a few steps from this marker); Prison Work (a few steps from this marker); Escape, Build, Repeat (a few steps from this marker); The Metal Man (a few steps from this marker); Prison Tourism (a few steps from this marker); Daily Needs (within shouting distance of this marker); Old New-Gate Prison (within shouting distance of this marker). Touch for a list and map of all markers in East Granby.
Also see . . .
1. Old New-Gate Prison & Copper Mine - CTVisit. (Submitted on June 16, 2024, by Michael Herrick of Southbury, Connecticut.)
2. Old New-Gate Prison & Copper Mine, East Granby - State of Connecticut. (Submitted on June 16, 2024, by Michael Herrick of Southbury, Connecticut.)
3. Old New-Gate Prison (Wikipedia). (Submitted on June 16, 2024, by Michael Herrick of Southbury, Connecticut.)
Credits. This page was last revised on May 19, 2026. It was originally submitted on June 16, 2024, by Michael Herrick of Southbury, Connecticut. This page has been viewed 319 times since then and 32 times this year. Photos: 1, 2. submitted on June 16, 2024, by Michael Herrick of Southbury, Connecticut.

