Sanpete County Water Intelligence Brief

October 5, 2026 | Sevier River Basin

Situation Summary

Streamflows across the Sevier River Basin are at low but stable late-season levels, with Manti Creek running at 2 cfs and the Sevier River at Hatch holding at 43 cfs as of October 5 — conditions consistent with the tail end of the irrigation season for turkey producers, ranchers, and hay growers in Sanpete County. Upstream gauges near Kingston and Lynndyl show rising signals worth monitoring, though no flow data is currently available from the Sigurd gauge. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

All six SNOTEL stations monitoring the Sevier River Basin report zero or near-zero snow water equivalent (SWE) as of October 4, 2026 — a normal condition for this point in the calendar, as median SWE values for early October are also at or near zero across these elevations.

| 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 | 0.0" | 0.0" |

| Thistle Flat | 0.3" | 0.0" |

GBRC HQ reports 1.0" of snow depth with 0.0" SWE, suggesting a very light, low-density surface accumulation that does not yet constitute meaningful water storage. Thistle Flat shows a trace SWE reading of 0.3" — the only station with any measurable water content. These early-October readings are not anomalous for the date; the relevant 2026 seasonal context is that snowpack melted out 4–6 weeks ahead of the historical median meltout date earlier this year, drawing down the basin's spring and early-summer supply sooner than typical. The snowpack accumulation season is just beginning, and meaningful SWE buildup is not expected until November at the earliest.

Streamflow Conditions

Manti Creek below Dugway Creek near Manti (USGS) is running at 2 cfs as of October 5, stable in trend. This is the only active in-county USGS gauge for Sanpete County; no active gauge exists on the San Pitch River mainstem, which represents a known monitoring gap. Sanpete Water Conservancy District can provide additional local monitoring context beyond what USGS data captures.

Sevier River Basin gauges outside the county provide broader system context:

Overall, basin flows are at low late-season volumes appropriate for early October, when irrigation demand is winding down. The rising trend at Kingston and Lynndyl may reflect recent precipitation or reduced upstream diversion as the season closes, but no causal explanation can be confirmed from available data alone.

Seasonal Guidance

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Data Sources: SNOTEL data through October 4, 2026; USGS streamflow data through October 5, 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.