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<br />Coordination lnth the Fish and Wildli.fe Service was performed in
<br />silnilar planning staces :in ~he ~onovT:'.ng llatersheds:
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<br />Montana - Boulder River tri"outary to the Jefferson River; Valley
<br />Creek tributary to the YelloNstone River.
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<br />North Dakota - Hild Rice "B", North and }liddle-South Forest River
<br />and Park Ri',er segments tributaries to the Red River of the North.
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<br />South Dakota - Veblen Creel~ tributary to Hild Rice River; seGJ1lents
<br />of Crow Creel~, tl'ibutarJ to James River; Turkey Ridge Creek, and
<br />other segments of the Vermillion River; upper Deer-Lake Hendricks
<br />an," Pattee Creek tributaries to the Big Sioux River.
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<br />iVy-orning - Arnold Drain tributary to the north Platte River.
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<br />Nebraska - Upper Big Nemaha River tributary to the !1issouri River;
<br />Cub Creek, Bear-Fierce-Cedar Creel~s, and Big Indian Creek
<br />tributaries to the Blue River.
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<br />Kansas - Spellman Creek tributary to the Saline River; Buffalo
<br />Creel, and segments of Salt Creek tributaries to the Solomon River;
<br />!'Jission Creek and Upper Black Vermillion River tributaries to the
<br />Blue River, Turkey Creel~, Lyons. Creek, Cross Creek, Slmngammga
<br />Creek, and segments of the Hal(arusa River, all tributaries to the
<br />Kansas River.
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<br />The Service participated ill the Levn.s and Clark Lake Inter-Agency
<br />Council meetings. Investigations v18re made in South Dakota on tribu-
<br />tary watersheds to the Missouri River in the reach from Fort Randall
<br />Dam to Gavins Point Dam. The. purpose was to develop recommendations
<br />in regard to alleviating sedimentation in the boat basins associated
<br />with the outlets of these tributary watersheds.
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<br />SOIL MID HATER CONSERVATIOlJ RESEARCH DIVISION
<br />NORTI/ERN PLAINS BRANC H
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<br />1961 Accomplis~~ents
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<br />The Cooperative Vater Yield Procedures Study at Lincoln developed and
<br />tested a rational method of evaluating the effects of the upstream
<br />conservation use and treatment of land on the dO;Tnstream water yields
<br />by streamflow of large creeks and rivers.
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<br />Analyses of streamflow data indicated that flood flows are reduced
<br />marlced1y by losses to valley alluviums. These losses approximate 25 to
<br />40 percent on watersheds of 500 to 5,000 acres in the Central Plains.
<br />Small flood events passing upper stream;"gaging stations may be reduced
<br />as much as 75 percent and an average of 40 percent, in an average of 50
<br />river-valley miles, before passing a tandem dO'Wllstream gaging station.
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