Water Resources Survey: Lewis And Clark County, Montana 1957
Water Resources Survey: Lewis And Clark County, Montana 1957
Montana.State Engineer
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Records are avail- able from October, 1904, through November, 1924. The maximum discharge observed was 4,300 cfs (June 2, 1908); there was no flow at times. The average annual discharge for the 20 years (1904- 1924) was 94.4 cfs. The highest annual runoff was 154,000 acre feet (1917); the lowest was 14,800 (1919); and the average, 68,340 acre feet per year. There were diversions above the gage for irriga- tion of about 4,500 acres. Willow Creek Near Augusta The gage was located just below Littl...e Willow Creek or 5 miles northwest of Augusta. The drain- age area is approximately 96 square miles. Records are available from June, 1905, through September, 1925. Prior to August 22, 1905, a staff gage was used and thereafter a chain gage. The maximum dis- charge was 1,150 cfs (June 23, 1916). The minimum was no flow (July 17, 1910). The average an- nual discharge (1905-25) was 27.7 cfs. Highest yearly flow was 56,200 acre feet (1916); the lowest —21— was 5,190 (1919); and the average, 20,050 acre feet per year.
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