Sanpete County Water Intelligence Brief

October 12, 2026 | Sevier River Basin

Situation Summary

Streamflows across the Sevier River Basin are showing a rising trend this week, with Manti Creek at 5 cfs and the Sevier River at Lynndyl reaching 32 cfs — conditions consistent with early autumn precipitation contributions rather than snowmelt-driven supply. For Sanpete County turkey producers, ranchers, and hay operators, the irrigation season is effectively closing, and attention is shifting toward fall system assessments and storage carryover ahead of winter. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

All six SNOTEL stations reporting in the Sevier River Basin show essentially no snow water equivalent as of October 11, 2026 — a normal condition for this date, as median SWE at these elevations is also 0.0" in mid-October.

| Station | SWE | Snow Depth |

|---|---|---|

| Beaver Dams | 0.0" | 0.0" |

| GBRC HQ | 0.0" | 1.0" |

| GBRC Meadows | 0.0" | 0.0" |

| Mammoth-Cottonwood | 0.0" | 0.0" |

| Mt Baldy | 0.1" | 0.0" |

| Thistle Flat | 0.1" | 0.0" |

The trace readings at Mt Baldy and Thistle Flat, along with a 1-inch snow depth at GBRC HQ, indicate early-season high-elevation precipitation has begun — typical of October patterns in the Wasatch Plateau. As background context, the 2026 water year was defined by meltout occurring 4–6 weeks ahead of the historical median meltout date, driven by an anomalous March heat wave. That early-season dynamic shaped summer supply conditions but is now a closed chapter. The critical variable going forward is whether November–March precipitation builds an adequate snowpack for the 2027 irrigation season.

Streamflow Conditions

Manti Creek below Dugway Creek near Manti — the only active USGS gauge within Sanpete County — is reading 5 cfs and rising as of October 12. This is the primary in-county streamflow indicator. No active gauge exists on the San Pitch River mainstem, which remains a known monitoring gap; contact Sanpete Water Conservancy District for any additional local monitoring data.

Sevier River Basin gauges providing broader context:

The rising trend at Hatch and Lynndyl, alongside rising conditions on Manti Creek, suggests recent precipitation is contributing to basin flows. The absence of data from the Sigurd gauge creates a gap in the mid-to-lower Sevier corridor; users dependent on that reach should contact the Utah Division of Water Resources for current conditions.

Seasonal Guidance

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Data Sources: SNOTEL data through October 11, 2026; USGS streamflow data through October 12, 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, U.S. Bureau of Reclamation, and Utah Division of Water Rights for regulatory decisions and water rights administration.