- Received 7 September 2016.
- Revision received 23 December 2016.
- Accepted 17 February 2017.
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©The Authors Gold Open Access: This paper is published under the terms of the CC-BY license.
- 1U.S. Geological Survey, MS 964, Federal Center, Denver, Colorado 80225, USA
- 2New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, New Mexico 87801, USA
- 3U.S. Army Corps of Engineers, South Pacific Division Dam Safety Production Center, 1325 J Street, Sacramento, California 95814, USA