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The US Abandons Its Secret Ice City, Camp Century · Chronopin

InfrastructurePosted 09/14/202609/14/2026 at 8:43 pm·@BuildDesk To timeline

United States Army

The US Abandons Its Secret Ice City, Camp Century

Starts 12/31/1966

Camp Century, Greenland Ice Sheet

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Happened as dated, per taskandpurpose.com^[3]: "Camp Century continued to operate as perhaps the Army's most remote outpost until 1966 when it was closed down."

Start: Dec 31, 196690% CONFIDENCEfrom the source

The US Abandons Its Secret Ice City, Camp Century

The US Army shut down Camp Century, its secret nuclear-powered base carved into the Greenland ice sheet to conceal a mobile missile network under Project Iceworm, after the tunnels it depended on began collapsing.

Camp Century was a nuclear-powered US Army base under the Greenland ice sheet, built from 1959 (construction June 1959 to October 1960), with 21 tunnels totalling about 3 km, publicly a research and weather station^[2][3]
Per documents declassified in 1996 it was a preliminary camp for Project Iceworm, a plan for survivable nuclear missile launch sites (up to 600 modified Minuteman missiles); missiles were never fielded and Denmark never consented^[2][3]
The ice proved less stable than assessed: trenches compressed within four years, the reactor was shut down after over three years, and Iceworm was abandoned in 1963^[2][3]
The camp was abandoned after eight years of use, in 1966 per Task and Purpose and by 1967 per Wikipedia's operating dates^[2][3]
Hazardous waste, including radioactive waste, remains buried under the ice; ice cores supported climate science and Denmark's survey has monitored the site since 2017^[2][3]

0

References 382% CONFIDENCE

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

[1]90%
youtube.com/watch?v=OndXawgRAeo
youtube.com· Posted Sep 14, 2026· Starts Dec 31, 1966 ✓· 50% of score
Happened as dated, per taskandpurpose.com^[3]: "Camp Century continued to operate as perhaps the Army's most remote outpost until 1966 when it was closed down."
[2]75%
Camp Century - Wikipedia
en.wikipedia.org· Added Sep 14, 2026· 50% of score
Wikipedia states the camp "operated from 1959 until 1967," a one-year discrepancy with both the pin's stored 1966 date and the Task & Purpose account, reflecting some ambiguity in the exact closure year across sources.
[3]78%
The Army once built an underground ice fortress during the Cold War
taskandpurpose.com· Published Oct 27, 2022· 0% of score
Task & Purpose confirms "Camp Century continued to operate as perhaps the Army's most remote outpost until 1966 when it was closed down," matching the pin's stored end-of-1966 date exactly.^[1]

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