Rocky Mountain Arsenal

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The Rocky Mountain Arsenal was a United States chemical weapons manufacturing center located in the Denver Metropolitan Area in Commerce City, Colorado. The site was operated by the United States Army throughout the later 20th century and was controversial among local residents until its closure in 1992.

Deep Injection Well

RMA contained a deep injection water well that was constructed in 1961.[1] It was drilled to a depth of 12,045 feet (3671 m). The well was cased and sealed to a depth of 11,975 feet (3650 m), with the remaining 70 feet (21 m) left as an open hole for the injection of Basin F liquids. For testing purposes, the well was injected with approximately 568,000 US gallons (2150 m³) of city water prior to injecting any waste. The Army said the injected fluids had very little potential for reaching the surface or usable groundwater supply since the injection point had 11,900 feet (3630 m) of rock above it and was sealed at the opening. The Army discontinued use of the well in February 1966 after a series of earthquakes in the area.[1][2] According to the USGS, "In 1967, an earthquake of magnitude 5.5 followed a series of smaller earthquakes. Injection had been discontinued at the site in the previous year once the link between the fluid injection and the earlier series of earthquakes was established.”[3] The well remained unused until 1985 when the Army permanently sealed the disposal well.

Resources

References

  1. 1.0 1.1 Deep Injection Well Fact Sheet. Rocky Mountain Arsenal, Remediation Venture Office (RVO). Retrieved on 21 August 2009.
  2. USGS Colorado Earthquake History. Retrieved on 21 August 2009.
  3. John Daly, "U.S. Government Confirms Link Between Earthquakes and Hydraulic Fracturing," Oil Drum, July 8, 2011.

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Wikipedia also has an article on Rocky Mountain Arsenal. This article may use content from the Wikipedia article under the terms of the GFDL.