will be returned by natural drainage and how much from the sump areas is not presently known, since the
<br />Kendrick Project is not completed.
<br />We will consider first the return flow from natural drainage. Ide v. United States, 263 U.S. 497 , 44 S.Ct.
<br />182, held that [325 U.S. 589, 635] the United States might recapture water which resulted from seepage
<br />from irrigated lands under a reclamation project and which was not susceptible of private appropriation
<br />under Wyoming law. The same conclusion was reached in United States v. Tilley, 8 Cir., 124 F.2d 850,
<br />where the United States was held to be entitled to use and apply the seepage from one division of the North
<br />Platte Project to supply lands of another division as against the claim of Nebraska of a right to intercept the
<br />seepage and apply it to appropriators senior to the project. And see Ramshorn Ditch Co. v. United States, 8
<br />Cir., 269 F. 80. Cf. United States v. Warmsprings Irrigation Dist., D.C., 38 F.Supp. 239. In the Ide case this
<br />Court said:
<br />'The seepage producing the artificial flow is part of the water which the plaintiff, in virtue of its
<br />appropriation, takes from the Shoshone river and conducts to the project lands in the vicinity of the ravine
<br />for use in their irrigation. The defendants insist that when water is once used under the appropriation it
<br />cannot be used again -that the right to use it is exhausted. But we perceive no ground for thinking the
<br />appropriation is thus restricted. According to the record it is intended to cover, and does cover, the
<br />reclamation and cultivation of all the lands within the project. A second use in accomplishing that object is
<br />as much within the scope of the appropriation as a first use is. The state law and the National Reclamation
<br />Act both contemplate that the water shall be so conserved that it may be subjected to the largest practicable
<br />use. A further contention is that the plaintiff sells the water before it is used, and therefore has no right in
<br />the seepage. But the water is not sold. In disposing of the lands in small parcels, the plaintiff invests each
<br />purchaser with a right to have enough water supplied from the project canals to irrigate his land, but it does
<br />not give up all control over the water or do more than pass to the purchaser a right to use the water so far as
<br />maybe necessary [325 U.S. 589, 636] in properly cultivating his land. Beyond this all rights incident to
<br />the appropriation are retained by the plaintiff. Its right in the seepage is well illustrated by the following
<br />excerpt from the opinion of District Judge Dietrick in United States v. Haga, D.C., 276 F. 41, 43:
<br />"One who by the expenditure of money and labor d verts appropriable water from a stream, and thus makes
<br />it available for fruitful purposes, is entitled to its exclusive control so long as he is able and willing to apply
<br />it to beneficial uses, and such right extends to what is commonly known as wastage from surface run off
<br />and deep percolation, necessarily incident to practical irrigation. Considerations of both public policy and
<br />natural justice strongly support such a rule. Nor is it essential to his control that the appropriator maintain
<br />continuous actual possession of such water. So long as he does not abandon it or forfeit it by failure to use,
<br />he may assert his rights. It is not necessary that he confine it upon his own land or convey it in an artificial
<br />conduit. It is requisite, of course, that he be able to identify it; but, subject to that limitation, he may
<br />conduct it through natural channels and may even commingle it or suffer it to commingle with other waters.
<br />In short, the rights of an appropriator in these respects are not affected by the fact that the water has once
<br />been used." 263 U.S. pages 505, 506, 44 S.Ct. page 185.
<br />If that principle were literally applied, the United States could reclaim the return flows 200 miles
<br />downstream from Kendrick at Whalen where they could be diverted to the Interstate or Ft. Laramie Canal.
<br />Or if not reclaimed there, the return flows could be applied below the Nebraska line to Warren Act contract
<br />requirements. The Special Master thought any such program would be so disruptive of orderly
<br />administration as to be intolerable. That, of course, is not the proposal. The proposal is to divert water at or
<br />above Alvoca in lieu of the return flows from Kendrick below Alcova. But we think the proposal is
<br />basically [325 U.S. 589, 637] not in accord with the principle underlying the Ide case. That principle is
<br />that although the water rights belong to the landowners, the owner of the irrigation project has an interest in
<br />the appropriative rights to the extent of obtaining the fullest use of the water for the project. It may,
<br />therefore, retain control over the water until abandonment. We think it goes too far to say that when the
<br />return flows are abandoned, they may nevertheless be exchanged for upstream diversions by the same
<br />amount. When the return flows are abandoned, they become subject to appropriation downstream. See 2
<br />Kinney, Irrigation and Water Rights (2d Ed. 1912) 1114. They no longer remain subject to control for
<br />further use in the project. Any claim to them or their equivalent under the form of an 'in lieu of diversion is
<br />lost.
<br />When it comes, however, to return flows resulting from drainage facilities installed by the United States,
<br />different considerations may be applicable. But for the drainage through artificial channels furnished by the
<br />United States, the unused water would never return to the river. The United States could rightfully leave the
<br />water in the sumps. In that case, no one would ever have the use of it. It is argued that since by artificial
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