Water Horse v. Wilhelmsen

2025 UT 43
CourtUtah Supreme Court
DecidedOctober 17, 2025
DocketCase No. 20240077
StatusPublished

This text of 2025 UT 43 (Water Horse v. Wilhelmsen) is published on Counsel Stack Legal Research, covering Utah Supreme Court primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Water Horse v. Wilhelmsen, 2025 UT 43 (Utah 2025).

Opinion

This opinion is subject to revision before final publication in the Pacific Reporter 2025 UT 43

IN THE

SUPREME COURT OF THE STATE OF UTAH

WATER HORSE RESOURCES, LLC, Appellant, v. TERESA WILHELMSEN, in her official capacity as the Utah State Engineer, Appellee.

No. 20240077 Heard April 7, 2025 Filed October 17, 2025

On Direct Appeal

Eighth District Court, Daggett County The Honorable Gregory M. Lamb No. 210800001

Attorneys:

__________________________________________________________  Additional appellees: Utah Division of Water Resources, Utah Board of Water Resources, Washington County Water Conservancy District, Central Utah Water Conservancy District, Wayne County Water Conservancy District, and Kane County Water Conservancy District.  Additional attorneys: John H. Mabey, Jr., David C. Wright, Jonathan R. Schutz, Salt Lake City, for appellees Kane County Water Conservancy District and Wayne County Water Conservancy District; Steven E. Clyde, Edwin C. Barnes, Timothy R. Pack, Salt Lake City, for appellee Central Utah Water Conservancy District; Zack L. Winzler, Graham J. Gilbert, Salt Lake City, for appellee Washington County Water Conservancy District; Erin T. Middleton, Asst. Solic. Gen., Wendy Crowther, Asst. Att’y Gen., Salt Lake City, for appellees Utah Board of Water Resources and Utah Division of Water Resources. WATER HORSE v. WILHELMSEN Opinion of the Court

Mark F. James, Salt Lake City, Glenn Porzak, Boulder, Colo., for appellant Derek E. Brown, Att’y Gen., Sarah Shechter, Asst. Att’y Gen., Erin T. Middleton, Asst. Solic. Gen., Salt Lake City for appellee Teresa Wilhelmsen, Utah State Engineer

JUSTICE HAGEN authored the opinion of the Court, in which CHIEF JUSTICE DURRANT, ASSOCIATE CHIEF JUSTICE PEARCE, JUSTICE PETERSEN, and JUSTICE POHLMAN joined.

JUSTICE HAGEN, opinion of the Court: INTRODUCTION ¶1 Beginning in the Rocky Mountains of central Colorado, the Colorado River flows over 1,400 miles through the arid American west towards a terminus in the Gulf of California. Colorado River Basin, U.S. BUREAU RECLAMATION, https://www.usbr.gov/ColoradoRiverBasin/(last updated Aug. 5, 2025). Along the way the river and its tributaries serve as a vital source of water to nearly forty million people. See KRISTEN HITE, CHARLES V. STERN & PERVAZE A. SHEIKH, CONG. RSCH. SERV., R45546, MANAGEMENT OF THE COLORADO RIVER: WATER ALLOCATIONS, DROUGHT, AND THE FEDERAL ROLE 1 (2025). For more than a century, allocation and management of the Colorado River System’s water has been governed by a legal framework commonly referred to as the “Law of the River,” which consists of a series of interstate compacts, international treaties, federal and state laws and regulations, and court decisions. Id. at 3–4. Among other things, the Law of the River apportions the water of the Colorado River System among the states of Arizona, California, Colorado, Nevada, New Mexico, Utah, and Wyoming. Id. at 1, 3–7. ¶2 The Law of the River applies with equal force to the Colorado River’s tributaries, including its principal tributary, the Green River. See HEAL Utah v. Kane Cnty. Water Conservancy Dist., 2016 UT App 153, ¶ 13, 378 P.3d 1246 (“As the largest tributary of the Colorado River, the Green River is managed under numerous compacts, federal laws, court decisions, and regulatory guidelines, including the Colorado River Compact.”). The headwaters of the Green River are located in western Wyoming and flow due south through the rugged mountain and desert terrain of eastern Utah

2 Cite as: 2025 UT 43 Opinion of the Court

before the river’s confluence with the Colorado River in Canyonlands National Park. Id. ¶ 11. ¶3 The parties seek resolution of a dispute under the terms of the Upper Colorado River Basin Compact (Upper Compact) and Utah’s Appropriation and Export Statutes. Appellant Water Horse Resources, LLC (Water Horse) filed an application with the Utah state engineer to divert 55,000 acre-feet1 of water from the Green River in Daggett County, Utah, to be piped across Wyoming and eventually put to beneficial use in Colorado. The state engineer rejected the application and later denied reconsideration. Water Horse sought de novo review of the state engineer’s order by the district court. ¶4 The district court ultimately granted summary judgment in favor of the state engineer. The court ruled that the Upper Compact did not preclude application of Utah’s water laws, and that Water Horse had subsequently failed to show that it complied with the relevant provisions of Utah’s Appropriation and Export Statutes. The court also ruled in the alternative that the state of Colorado was a necessary and indispensable party that could not be joined and that the action should be dismissed under Utah Rule of Civil Procedure 19. Water Horse appealed. ¶5 We hold that Water Horse has not met its burden of persuasion to establish that the district court erred in granting summary judgment in favor of the state engineer. More specifically, we hold (1) that Utah’s Export Statute does not conflict with the express terms of the Upper Compact and is therefore not preempted and (2) that Water Horse has failed to establish that there is “reason to believe” that the exported water can be put to beneficial use in Colorado. Consistent with these holdings, we affirm the judgment of the district court.2

__________________________________________________________ 1 “An acre-foot is a volumetric measurement defined as the

water that would cover one acre one foot deep.” W. Water, LLC v. Olds, 2008 UT 18, ¶ 2 n.1, 184 P.3d 578 (citing UTAH CODE § 73-1-2 (2004)). 2 Because we affirm the district court on the issue of beneficial

use, we decline to reach the issues of whether Water Horse’s application is speculative under Utah Code section 73-3-8, and whether the state of Colorado is a necessary and indispensable party under rule 19 of the Utah Rules of Civil Procedure.

3 WATER HORSE v. WILHELMSEN Opinion of the Court

BACKGROUND A. The Colorado River Compact and the Upper Colorado River Basin Compact ¶6 In 1921, Congress authorized the states of Arizona, California, Colorado, Nevada, New Mexico, Utah, and Wyoming to enter into an interstate agreement to apportion and manage the water of the Colorado River System. See Act of Aug. 16, 1921, ch. 72, 42 Stat. 171. Following that authorization, the states signed the Colorado River Compact to “provide for the equitable division and apportionment of the use of the waters of the Colorado River System.” COLORADO RIVER COMPACT art. I.3 The Compact ultimately became effective upon ratification by Congress and the signatory states. See 43 U.S.C. §§ 617c(a), 617l(a); see also COLORADO RIVER COMPACT art. XI. The Colorado River Compact has become the cornerstone of the Law of the River and is to this day the main governing source of law regarding apportionment of the water of the Colorado River System. See KRISTEN HITE, CHARLES V. STERN & PERVAZE A. SHEIKH, CONG. RSCH. SERV., R45546, MANAGEMENT OF THE COLORADO RIVER: WATER ALLOCATIONS, DROUGHT, AND THE FEDERAL ROLE 3–4 (2025).

__________________________________________________________ 3 The Colorado River Compact was ratified by Congress. See 43

U.S.C. § 617l(a). Likewise, Congress ratified the Upper Compact. See Act of Apr. 6, 1949, ch. 48, 63 Stat. 31. In ratifying the Colorado River Compact and the Upper Compact, Congress did not codify their text in the U.S. Code. But when Utah ratified these compacts, the legislature did codify their text at Utah Code section 73-12a-2 (Colorado River Compact) and section 73-13-10 (Upper Compact).

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2025 UT 43, Counsel Stack Legal Research, https://law.counselstack.com/opinion/water-horse-v-wilhelmsen-utah-2025.