The first PNE blast was Project Gnome, conducted on December 10, 1961 in a salt bed 24 mi (39 km) southeast of Carlsbad, New Mexico.
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Proposed uses for nuclear explosives under Project Plowshare included widening the Panama Canal, constructing a new sea-level waterway through Nicaragua nicknamed the Pan-Atomic Canal, cutting paths through mountainous areas for highways, and connecting inland river systems.
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One proposal suggested using nuclear blasts to connect underground aquifers in Arizona.
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The final PNE blast took place on 17 May 1973, under Fawn Creek, 76.4 km north of Grand Junction, Colorado.
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