Abstract

Peak-streamflow data, collected since July 1, 1955, are presented in this report. Originally, 45 crest-stage gaging stations were established. Since 1955, the program of data collection has been expanded and reevaluated. As of the end of water year 1989, data were being collected at 158 stations and had been collected at 328 total stations. The stations record peak stages of flow from upstream drainage areas that range in size from less than 1 square mile to several hundred square miles. The purpose of the program is to collect sufficient peakflow data to permit development of methods for estimating the magnitude and frequency of floods at any point in Montana. For each station, this report briefly describes the station location, drainage area, period of record available, and type of gage including altitude of gage. The tabular data consist of annual maximum gage height and discharge listed by water year and month or month and day.

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