Wyoming v. Colorado

Infobox SCOTUS case
Litigants=Wyoming v. Colorado
ArgueDate=December 6, 7, 8
ArgueYear=1916
ReargueDate=January 9, 10
ReargueYear=1918
ReargueDate2=January 9, 10
ReargueYear2=1922
DecideDate=June 5
DecideYear=1922
FullName=State of Wyoming v. State of Colorado et al.
USVol=459
USPage=419
Citation=259 U.S. 419, 42 S.Ct. 552, 66 L.Ed. 999
Prior=In equity.
Subsequent=Petition for rehearing granted October 9, 1922. 260 U.S. 1 Motion to dismiss denied May 31, 1932. 286 U.S. 494
Holding=Colorado could divert a limited amount of water from an interstate stream system as long as it did not interfere with Wyoming's previously established (prior appropriation) right to the same stream system.
SCOTUS=1921-1922
Majority=Van Devanter
JoinMajority=unanimous court
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"Wyoming v. Colorado" ussc|259|419|1922 is a set of court cases, all dealing with water distribution from the Laramie River. Petition for rehearing was granted ussc|260|1|1922 which revised the original decision. A motion to dismiss was later denied. ussc|286|494|1932

When two states have a controversy between each other, the case is filed for original jurisdiction with the United States Supreme Court. This is one of the very limited circumstances where the court acts with original jurisdiction, e.g. a trial court. In all other cases the court acts as the highest level appellate court in the United States.

The state of Wyoming brought an action against the state of Colorado to prevent the diversion of a stream system. Wyoming claimed the doctrine of prior appropriation granted them superior rights to the stream water, since they claimed the water first, and that Colorado's proposed diversion would leave them with an insufficient supply of water.

The court upheld Wyoming's prior appropriation water rights, preventing Colorado's proposed diversion of the stream system as originally planned. However, the court allowed Colorado to divert a lesser amount of water, as long as it did not interfere with Wyoming's prior water usage. After in depth fact-finding of the exact amount of water used by Wyoming, the court determined that Colorado could divert no more than 15,500 acre-feet per year of water from the interstate stream system.

ee also

* Arizona v. California
* List of United States Supreme Court cases: volume 259, volume 260, volume 286