Sevier County Water Intelligence Brief

April 22, 2026 | Sevier River Basin

Situation Summary

Water supply conditions across Sevier County enter late April in a critically stressed state. Snowpack across the Sevier River Basin is severely depleted — a consequence of what has already been characterized as one of the worst snow years on record in the Mountain West, compounded by an extreme March heat wave that accelerated snowmelt well ahead of the normal seasonal curve. With the primary snowpack replenishment window now largely closed and stored water running well below historical norms, agricultural water users should anticipate a difficult and constrained irrigation season. Early planning, water-use efficiency, and direct coordination with water managers are strongly advised.

Snowpack Conditions

Three SNOTEL stations provide coverage for the Sevier River Basin, and conditions at all three reflect the severity of this season's snowpack deficit.

Big Flat reports a snow water equivalent (SWE) of 6.2 inches, representing just 35% of the 17.7-inch median for this date, with a snow depth of 15.0 inches.

Farnsworth Lake shows 8.2 inches SWE — 40% of the 20.2-inch median — with a snow depth of 26.0 inches. This station retains the most remaining snowpack in the monitored network, though it remains significantly below normal.

Donkey Reservoir has recorded 0.0 inches SWE and 0.0 inches depth, representing 0% of the 5.2-inch median. Snow has completely disappeared at this location, well ahead of any normal melt-out date.

Taken together, these readings confirm that the basin's snowpack — the primary driver of spring and early summer streamflow — is severely diminished across all elevations. With the season this far advanced, meaningful recovery is unlikely.

Streamflow Conditions

USGS gauges across the Sevier River system tell a mixed but generally concerning story for the coming weeks.

Sevier River at Hatch, UT was measured at 117 cfs on April 22, with flow reported as falling. Sevier River near Kingston, UT recorded 13 cfs, currently stable. Sevier River near Lynndyl, UT — the furthest downstream gauge — shows 271 cfs, also falling. Sevier River near Sigurd, UT has no recent flow data available.

The falling trend at Hatch and Lynndyl is notable, as declining flows at this point in the season — before peak irrigation demand arrives — raise questions about how systems will perform as the summer progresses. Users relying on downstream diversions should monitor gauge trends closely in the coming days.

Key Reservoir Systems

Major water storage infrastructure serving Sevier County agriculture includes Sevier Bridge Reservoir (also known as Yuba Reservoir), Otter Creek Reservoir, Piute Reservoir, and Johnson Valley Reservoir. Current storage conditions at these facilities should be confirmed directly with the U.S. Bureau of Reclamation and the relevant water conservancy districts, as capacity and storage figures are not available in this brief.

Water Rights Administration Outlook

Given severely below-normal snowpack and falling streamflow trends, there is a high likelihood that water administrators will face difficult allocation decisions during the 2026 irrigation season. Junior water right holders — particularly those with more recent priority dates — should prepare for the possibility of curtailment or reduced delivery schedules. Early communication with the Utah Division of Water Rights and local irrigation companies is strongly encouraged. Do not assume normal delivery schedules will hold without confirmation from your water district.

Groundwater Considerations

Agricultural users in Sevier County draw on valley-fill aquifer systems associated with the Sevier River corridor. In low surface-water years, pressure on groundwater resources typically increases. Users considering expanded groundwater pumping should verify that existing water rights authorize such use and consult with the Utah Division of Water Rights before making operational changes. Coordinated aquifer management becomes especially important when surface supplies are constrained.

Management Recommendations

Immediate Actions:

Planning Actions:

Efficiency Actions:

Historical Context

The conditions emerging in 2026 share characteristics with several historically difficult water years in the Intermountain West. 1977 stands as one of the most severe drought years in regional memory, resulting in widespread agricultural adjustments and emergency measures across Utah and neighboring states. 2015 brought similarly depleted snowpacks in the Mountain West, with significant curtailments affecting junior water right holders across multiple Utah river systems. 2021 presented another low-water analog, prompting water conservation orders and difficult triage decisions for agricultural users across the Colorado River system and beyond. In each of these years, early preparation and proactive communication with water managers proved critical for operations that successfully navigated the season.

The 2026 situation warrants the same level of seriousness.

Data Sources: NRCS SNOTEL network (3 stations), USGS National Water Information System (4 gauges), National Weather Service seasonal outlooks

Data Current As Of: SNOTEL data through April 21, 2026; USGS streamflow data through April 22, 2026

Important Disclaimers: This brief provides automated analysis for informational purposes only. Specific numerical claims have not been independently verified. Consult official sources including your local water district, Utah Division of Water Rights, and U.S. Bureau of Reclamation for regulatory decisions and water rights administration.

Update Schedule: Daily during peak irrigation season