Helena, Montana : U.S. Department of the Interior, U.S. Geological Survey, 1993
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Map
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Full Title:
Water-surface profile and flood boundaries for the computed 100-year flood, Porcupine Creek, Fort Peck Indian Reservation and adjacent area, Montana / by R.J. Omang
Relief shown by contours and spot heights. "Prepared in cooperation with the Fort Peck Tribes." Date of issue: April 1993. Includes text, 1 table, location and index maps, and 13 graphs.