Project Chariot was a 1958 United States Atomic Energy Commission proposal to construct an artificial harbor at Cape Thompson on the North Slope of the U.S. state of Alaska by burying and detonating a string of nuclear devices.
 The project originated as part of Operation Plowshare, a research project to find peaceful uses for nuclear explosives. Substantial local opposition, objections from environmental scientists, and the absence of any credible economic  benefit caused the plan to be quietly shelved.

History 
A 1957 meeting at the Lawrence Radiation Laboratory (LRL) proposed a program to use nuclear explosives for industrial development projects. This proposal became the basis for Project Plowshare, administered by the United States Atomic Energy Commission. Chariot was to be the first Plowshare project, and was imagined as a way to show how larger projects, such as a widened Panama Canal, or a sea-level Nicaragua Canal, might be accomplished.

The plan was championed by LRL director and nuclear scientist Edward Teller, who traveled throughout Alaska touting the harbor as an important economic development for America's newest state. Teller promoted a study by the LRL that proposed development of coal deposits in the area. Despite being blocked by ice for nine months of the year, Teller and the LRL proposed the harbor as a port for coal shipment. The mines themselves would have been on the far side of the Brooks Range, requiring a railroad and storage facilities for the coal waiting to be shipped.

As the plan developed, nuclear testing at the Nevada Test Site indicated that smaller explosions could accomplish much to the publicly-stated goals of the project with less risk of radioactive releases or contamination. At the same time, as it became apparent that there could be little economic justification for the project, the program shifted to a more clearly avowed program for testing nuclear excavation in a remote location.

Alaskan political leaders, newspaper editors, the state university's president, even church groups all rallied in support of the massive detonation. Congress had passed the Alaska Statehood Act just a few weeks before. An editorial in the July 24, 1960 Fairbanks News-Miner said, "We think the holding of a huge nuclear blast in Alaska would be a fitting overture to the new era which is opening for our state."

Opposition and abandonment
Opposition came from the Inupiaq Alaska Native village of Point Hope, a few scientists engaged in environmental studies under AEC contract, and a handful of conservationists. The grassroots protest soon was picked up by organizations with national reach, such as The Wilderness Society, the Sierra Club, and Barry Commoner's Committee for Nuclear Information. Repeated visits to the community by AEC officials failed to sway local and Native residents, who opposed land transfers by the Bureau of Land Management (BLM) to the AEC. Activism opposing the project contributed to Native organization and Native rights activism, which contributed to the establishment of the Alaska Native Claims Settlement Act of 1971.

Internationally, the project drew objections from the Soviet Union, which viewed such projects as a way of circumventing the Partial Nuclear Test Ban Treaty, at the time in negotiation.

In 1962, facing increased public uneasiness over the environmental risk and the potential to disrupt the lives of the Alaska Native peoples, the AEC announced that Project Chariot would be "held in abeyance." It has never been formally canceled.

In addition to the objections of the local population, no practical use of such a harbor was ever identified. The environmental studies commissioned by the AEC suggested that radioactive contamination from the proposed blast could adversely affect the health and safety of the local people, whose livelihoods were based on hunting animals. The investigations noted that radiation from worldwide fallout was moving with unusual efficiency up the food chain in the Arctic, from lichen, to caribou (which fed on lichen), to humans (for whom caribou was a primary food source). Studies also showed that the blasts would thaw the permafrost, making the slopes surrounding the harbor unstable, and negating any experimental value to be gained from using the project as a basis for extrapolation to other, warmer locations. While the AEC publicly touted prevailing winds from the north for dispersing radioactivity over the sea, the AEC privately desired to study landward distribution. The consistent wind patterns would prevent northward fallout patterns over land.

In the meantime, test shots in Nevada provided the data that the AEC sought for radiation release modeling. The very small 430-ton equivalent Danny Boy test in March 1962 encouraged the AEC to stage much larger 104-kiloton Sedan test in July 1962. Gerald Johnson, the director of Project Plowshare, described the Sedan test as "an alternative to Chariot" arising from frustration at recommendations for Chariot's cancellation. Fallout from Sedan turned out to be the second-highest of any test in Nevada.

Plan
The project initially envisioned the use of four 100 kiloton devices to excavate a channel, and two one-megaton devices to excavate a turning basin, for a total of 2.4 megatons of explosive equivalent, displacing  of earth. Later iterations reduced the explosive total to 480 kilotons, and subsequently proposed a 280 kiloton test or demonstration. The latter plan proposed two or three 20 kiloton explosions and two more of approximately 200 kilotons each, for a correspondingly smaller basin.

Contamination
Although the detonation never occurred, the site was radioactively contaminated by an experiment to estimate the effect on water sources of radioactive ejecta, landing on tundra plants, and subsequently washed down and carried away by rains. Material from a 1962 nuclear explosion at the Nevada Test Site was transported to the Chariot site in August 1962, used in several experiments, then buried. The site comprised a mound of about , about  tall. Thirty years later, the disposal was discovered in archival documents by a University of Alaska researcher. State officials immediately traveled to the site and found low levels of radioactivity at a depth of two feet (60 cm) in the burial mound. Outraged residents of the Inupiat village of Point Hope, who had experienced an unusually high rate of cancer deaths, demanded the removal of the contaminated soil, which the government did at its expense in 1993.

The sites for test boreholes drilled for Project Chariot were remediated in 2014. The five boreholes, drilled in the early 1960s, had used refrigerated diesel fuel as a drilling fluid, contaminating the surrounding area.

See also
 Project Carryall
 Project Gnome

References

Further reading
 
 
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 Coates, Peter. 'Project Chariot: Alaskan roots of environmentalism'. Alaska History 4/2 (1989), 1-31
 
 
 Vandegraft, Douglas L Project Chariot: Nuclear Legacy of Cape Thompson. Proceedings of the U.S. Interagency Arctic Research Policy Committee Workshop on Arctic Contamination, Session A: Native People's Concerns about Arctic Contamination II: Ecological Impacts, May 6, 1993, Anchorage, Alaska
 Wedman. William, and Charles Diters. The legacy of project Chariot. Bureau of Indian Affairs, Alaska Region regional archaeology report under the National Historic Preservation Act. Undated, circa 2007.

External links
 

1958 in Alaska
Chariot
Pre-statehood history of Alaska
Chariot
Chariot