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<br />00164S
<br />
<br />Appendix B
<br />
<br />MCNTHLY SlJMMARY OF DISCHARGE
<br />
<br />.
<br />
<br />Little Bighorn River near Crow Agency, Montana
<br />
<br />Location.__Lat 45034', long 107027', in E!SEt sec. 13, T. 3 s., R. 34 E.,
<br />on right bank at Chicago, Burlington & Quincy Railroad bridge, 2 miles
<br />south of Crow Agency and 14 ndles upstream from mouth.
<br />
<br />Draina~e area.--l,l90 sq nd, approximately.
<br />
<br />Records available.--April 1912 to September 1924, August 1928 to December
<br />1932, April 1938 to September 1957 (few winter records in earlier years).
<br />March 1905 to June 1906 at site at Crow Agency, 2 ndles downstream,
<br />records not equivalent because Crow Agency ditch diverts water between
<br />the two sites. October 1915 to September 1940, published as Little
<br />H~rrr:River near Crow Agency.
<br />
<br />Ga~e.--Water-stage recorder. April 11, 1912 to Sept. 30, 1918, staff or
<br />chain gage; Oct. 1, 1918, to Sept. 30, 1924, Alig. 26, 1928, to Sept.
<br />30, 19)0, water-stage recorder; Oct. 1, 1931, to Dec. 5, 1932, Apr. 1,
<br />1938 to May 6, 1947, wire-weight or chain gage; all at s~~e site and
<br />datum.
<br />
<br />Average discharge.-21 years (1928-29, 1931-32, 1938-57). 262 cfs 4189,700
<br />acre-feet per year)
<br />
<br />.
<br />
<br />Extremes.--Maximum discharge during year, 2,7';1:1 cfs June 19 (gage aeight
<br />9.84 ft); maximum gage height, W.69 ft Feb. 27 (ice jam); mininl_ dis-
<br />charge, 39 cfs Oct. 2 (gage height, 3.97 ft).
<br />
<br />1912-24, 1928-32, 1938-57: Maximum discharge observed, about
<br />8,200 cfs July 23, 1923 (gage height, 14.0 ft); no flow JulY,28 ..
<br />Aug. 6, 1921.
<br /> Second- Runoff in
<br />~ foot days Maximum Minimum .llil.!!:! Acre.feet
<br />October 1956 2,141 122 39 69.1 4,2';1:1
<br />November 3,900 170 115 133 7,890
<br />December 3,292 135 75 106 6,530
<br />January 1957 2,618 95 fJJ 84.5 5,190
<br />February 6,233 '1~:500 85 223 12,360
<br />March 5,997 605 140 193 11,890
<br />April 8,183 1,470 131 273 16,230
<br />May 14,789 945 201 477 29,330
<br />June 40,915 2,6&J 565 1,364 81,1';1:1
<br />July 13,047 1,0<;0 87 421 25,880
<br />August 4,049 242 liD l42 8,7';1:1
<br />September 1957 5.220 226 li4 174 10 .350
<br />Water year 1955-57 110,824 2,660 39 304 219,000
<br />. 10.
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