Summit County, UT — Water Intelligence Brief

September 21, 2026 | Free-Tier Edition

Situation Summary

Summit County's dual-watershed streamflows are diverging this week: Weber River flows are falling across the upper system while the Provo River near Woodland is rising, reflecting the county's role as headwaters source for both the WBWCD reservoir network and Jordanelle Reservoir downstream. For Kamas Valley irrigators, the rising Provo signal offers modest late-season relief, but with snowpack fully absent across all four in-county SNOTEL stations, there is no new snowmelt entering either system — current flows reflect residual drainage and groundwater contributions only. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

All four Summit County SNOTEL stations recorded 0.0" snow water equivalent and 0.0" snow depth as of September 20 — a normal condition for this date, as the historical median SWE at all stations is also 0.0" by late September. No below-normal language applies to current readings.

| Station | SWE | Depth |

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

| Beaver Divide | 0.0" | 0.0" |

| Chalk Creek #1 (9,160 ft) | 0.0" | 0.0" |

| Chalk Creek #2 (8,200 ft) | 0.0" | 0.0" |

| Trial Lake | 0.0" | 0.0" |

Chalk Creek #1 and #2 are the primary Weber-side headwaters monitors for the Coalville/upper Chalk Creek drainage. Trial Lake and Beaver Divide are the home snowpack stations for the upper Provo River watershed. The relevant 2026 context: all four stations melted out 4–6 weeks ahead of the historical median meltout date, meaning the seasonal snowmelt pulse that feeds summer streamflow concluded earlier than normal — that earlier-than-normal depletion is background to current conditions, not today's story.

Streamflow Conditions

Summit County is currently producing diverging signals across its two watershed systems.

Weber Basin (falling):

Provo Basin (rising):

The Weber at Echo reading — 50 cfs falling — is the primary integrator for what is entering the WBWCD in-county reservoir system. The Provo near Woodland reading — 42 cfs rising — represents what Summit County is currently sending downstream toward Wasatch County. The cause of the Provo rise is not indicated in available data; users should contact Summit Water Distribution Company for operational context.

Seasonal Guidance

Subscribe for the full brief including reservoir storage, weather forecasts, depletion analysis, and detailed operational recommendations.

Data Sources: SNOTEL data through September 20, 2026; USGS streamflow data through September 21, 2026

Data Current As Of: September 21, 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, Weber Basin Water Conservancy District (WBWCD — operates Echo Reservoir and Rockport Reservoir, both physically located in Summit County), U.S. Bureau of Reclamation (Upper Colorado Region), Park City Municipal Corporation (municipal water for Park City and Snyderville Basin), Summit Water Distribution Company (Kamas Valley), Provo River Water Users Association (upper Provo River allocation), and Utah Division of Water Rights for regulatory decisions and water rights administration.