Sanpete County Water Intelligence Brief

September 14, 2026 | Sevier River Basin

Situation Summary

Streamflows across the Sevier River Basin are running at low but stable late-season levels, consistent with typical September conditions following irrigation drawdown — though the basin entered this period with less stored snowmelt buffer than most years after an anomalously early spring melt. Turkey producers, ranchers, and hay growers in Sanpete County should plan for continued tight late-season supply as natural flows decline toward their seasonal minimum. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

All six SNOTEL stations reporting for the Sanpete County area show 0.0" snow water equivalent (SWE) and 0.0" snow depth as of September 13, 2026 — which is the normal seasonal condition for mid-September. At this point in the calendar, the historical median SWE is also 0.0", so stations are not reading below normal for today's date.

The meaningful snowpack story for 2026 is timing: all monitored stations — Beaver Dams, GBRC HQ, GBRC Meadows, Mammoth-Cottonwood, Mt. Baldy, and Thistle Flat — melted out approximately 4–6 weeks ahead of the historical median meltout date, driven by an anomalous March heat wave. That early meltout compressed the spring runoff pulse and reduced the recharge window for both surface storage and local aquifer systems. The snowpack signal to watch now is the onset of the 2026–27 accumulation season — early October readings at these stations will be the first indicator of whether next year's supply outlook begins on stronger footing.

Streamflow Conditions

Manti Creek below Dugway Creek, near Manti (the only active in-county USGS gauge), is running at 3 cfs as of September 14, stable in trend. This is the primary direct indicator of in-county surface water availability. No active gauge exists on the San Pitch River mainstem — users relying on San Pitch deliveries should contact Sanpete Water Conservancy District for local monitoring data.

Broader Sevier River Basin context from adjacent gauges:

Overall, the basin is displaying the low-flow pattern expected for mid-September. The rising trend at Lynndyl is a notable data point but should be interpreted cautiously without the Sigurd gauge data to provide mid-reach context. Flows at this stage of the season are sustained primarily by base flow and managed releases rather than active snowmelt contribution.

Seasonal Guidance

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Data Sources: SNOTEL data through September 13, 2026; USGS streamflow data through September 14, 2026

Data Current As Of: Utah Division of Water Rights

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 the Utah State Engineer's Office for regulatory decisions and water rights administration.