Texas v. New Mexico
U.S. Supreme Court · decided December 14, 2020 · Supreme Court Database (Spaeth)
- Decided
- December 14, 2020
- Term
- October Term 2020
- Vote
- 7–1
- Majority author
- Justice Kavanaugh
- Issue area
- Interstate Relations
- Disposition
- Petition denied or appeal dismissed
- Outcome
- Petitioning party lost
- Ideological direction
- Unspecifiable
Opinion excerpt
(Slip Opinion) OCTOBER TERM, 2020 1 Syllabus NOTE: Where it is feasible, a syllabus (headnote) will be released, as is being done in connection with this case, at the time the opinion is issued. The syllabus constitutes no part of the opinion of the Court but has been prepared by the Reporter of Decisions for the convenience of the reader. See United States v. Detroit Timber & Lumber Co., 200 U.S. 321 , 337. SUPREME COURT OF THE UNITED STATES Syllabus TEXAS v. NEW MEXICO ON MOTION FOR REVIEW OF THE RIVER MASTER’S FINAL DETERMINATION No. 65, Orig. Argued October 5, 2020—Decided December 14, 2020 The 1949 interstate Pecos River Compact provides for equitable appor- tionment of the use of the Pecos River’s water by New Mexico and Texas. In a 1988 amended decree in this case, the Court appointed a River Master to annually calculate New Mexico’s obligations to Texas under the Compact. See Texas v. New Mexico, 485 U.S. 388 . The Court also adopted the River Master’s Manual, which elaborates on how to make the necessary calculations to determine whether New Mexico is complying with its obligations under the Compact. As rele- vant, §C.5 of the Manual provides that when water is stored “at the request of Texas” in a facility in New Mexico, then New Mexico’s deliv- ery obligation “will be reduced by the amount of reservoir losses at- tributable to its storage.” In 2014, a tropical…
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