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Articles written by Dan Wychgram


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  • Geologic hazards of the Bighorn River Floodplan

    Dan Wychgram|May 26, 2016

    In my initial article on geologic hazards of the Bighorn River floodplain, I described how towns along the Bighorn River are at risk due to possible seismic activity causing the Boysen Dam to become damaged or to fail. The following scenario is a theoretical combination of events. Thanks to multiple monitoring government agencies, we would have adequate warning and preparedness such that loss of property and life would be minimized. Now consider a combination of circumstances that could come together to create the “Perfect Storm.” A winter sea...

  • The Wind/Bighorn River is an 'antecedent stream'

    Dan Wychgram|May 5, 2016

    In a recent letter to the editor, Duane Richter questioned how the Wind River was able to start at the top of the Owl Creek Mountains in order to carve out the Wind River Canyon. The answer to this perplexing question is that it didn’t. The Wind/Bighorn River is a classic example of an antecedent stream. An antecedent stream is defined as a stream which pre-existed local uplift and maintained its original course and grade by incising its channel at approximately the same rate as the topography was rising. The Wind River Canyon is correctly r...