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A controlled ground water area (CGWA) is a category defined by the Department of Natural Resources and Conservation (DNRC) of the state of Montana.A CGWA must satisfy a set of criteria, including ground water withdrawals in excess of recharge; excessive declines in ground water levels or pressures; possibility of contaminant migration; or the existence of significant disputes within the area ...
The geology of Montana includes thick sequences of Paleozoic, Mesozoic and Cenozoic sedimentary rocks overlying ancient Archean and Proterozoic crystalline basement rock. . Eastern Montana has considerable oil and gas resources, while the uplifted Rocky Mountains in the west, which resulted from the Laramide orogeny and other tectonic events have locations with met
The Montana Environmental Information Center is an environmental organization in the United States. It was founded in 1973 by Montanans to protect and restore Montana's natural environment. It functions as a non-profit environmental advocacy group. [2]
This is a list of Superfund sites in Montana designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to clean up hazardous material contaminations. [1]
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The Berkeley Pit is a low spot and acts like a sump for contaminated water. For this reason, it is currently an active part of the remedy for this operable unit. [3] A pilot water treatment project was initiated in 2019. It began treating and releasing Berkeley Pit water into Silver Bow Creek at the confluence with Blacktail Creek.
Water that falls at the summit can flow either to the Pacific, Atlantic, or Arctic oceans (when Hudson Bay is considered a marginal sea of the Arctic Ocean). The International Hydrographic Organization (in its current unapproved working edition only [4] of Limits of Oceans and Seas) defines the Hudson Bay, with its outlet extending from 62.5 to 66.5 degrees north (just a few miles south of the ...
Since 1991, the median day that Montana’s snowpack as a whole reached its peak is April 14, at 18 inches of snow water equivalent, which is the amount of water contained in the snowpack.