Water Intelligence Brief · Archive

Summit County, UT

October 5, 2026

Summit County, UT — Water Intelligence Brief

October 5, 2026 | Free-Tier Edition

Situation Summary

Summit County's dual headwaters role defines conditions this week: the upper Weber River system is delivering stable late-season baseflows into Echo Reservoir, while the upper Provo River near Woodland shows a modest rising signal — a positive indicator for Kamas Valley agricultural users closing out the irrigation season. All four in-county SNOTEL stations are at 0.0" SWE and 0.0" snow depth, consistent with normal early-October snowpack conditions at this point in the calendar. 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 (SWE) and 0.0" snow depth as of October 4, 2026 — consistent with the normal seasonal condition for early October, when median SWE at these elevations is also 0.0".

Weber Basin headwaters (Chalk Creek stations):

  • Chalk Creek #1 (392:UT:SNTL, 9,160 ft): 0.0" SWE, 0.0" depth
  • Chalk Creek #2 (393:UT:SNTL, 8,200 ft): 0.0" SWE, 0.0" depth

    • These two stations monitor snowpack in the upper Chalk Creek drainage above Coalville — the primary Weber River headwaters snowpack indicators for Summit County.

    Provo Basin headwaters (Trial Lake and Beaver Divide):

  • Trial Lake (828:UT:SNTL): 0.0" SWE, 0.0" depth
  • Beaver Divide (330:UT:SNTL): 0.0" SWE, 0.0" depth

    • These are home stations for Summit County, monitoring the upper Provo River headwaters directly. The key seasonal context for 2026: all four stations melted out approximately 4–6 weeks ahead of the historical median meltout date, driven by an anomalous March heat wave. That early meltout shaped the summer streamflow trajectory across both basins. Accumulation season is now beginning — first measurable snowfall at upper elevations typically arrives in October, and these stations will be the primary indicators to watch for the 2026–27 snowpack season opening signal.

    Streamflow Conditions

    Summit County sits at the top of two river systems. Current gauge readings reflect what is leaving the county toward downstream reservoirs and users.

    Weber Basin — upper system:

  • Weber River near Oakley, UT: 54 cfs (stable) — This upper mainstem reading captures early Weber River aggregation before the river enters the lower valley. Stable conditions suggest no significant precipitation pulses or rapid groundwater release affecting the upper reach.
  • Weber River near Coalville, UT: 24 cfs (stable) — Reflects flows in the Coalville ranching corridor along the upper Weber mainstem. Stable and modest, consistent with late-season baseflow character.
  • Weber River at Echo, UT: 50 cfs (stable) — This is the primary Weber basin integrator for Summit County, measuring total upper Weber River flow entering the WBWCD reservoir system at Echo Reservoir. At 50 cfs stable, the system is delivering consistent late-season input to Echo Reservoir. Downstream users in the WBWCD system — Weber County, Davis County via the Davis Aqueduct — are receiving what Summit County's upper watershed can provide at this point in the season.
  • Weber River at Gateway, UT: 89 cfs (falling) — This downstream reading reflects aggregated flow further into the WBWCD delivery corridor; the falling signal is worth monitoring but does not change the stable upper-county picture.
  • East Canyon Creek near Jeremy Ranch, UT: 13 cfs — East Canyon Creek represents the Park City municipal watershed, with flow measured near Jeremy Ranch. At 13 cfs, this is modest late-season flow in the East Canyon drainage — within normal late-summer and early-fall baseflow range for this corridor.

    • Provo Basin — upper Provo River:

  • Provo River near Woodland, UT: 46 cfs (rising) — This is Summit County's primary contribution gauge to the Provo River system, measuring flow leaving the county before it reaches Jordanelle Reservoir in Wasatch County. The rising signal at 46 cfs is the most operationally notable reading in this brief. A rising upper Provo in early October can reflect late-season precipitation or groundwater response. Kamas Valley irrigators approaching the end of their irrigation season and Provo River Water Users Association should note this as a positive late-season delivery signal.

    • Across both basins, flows are in late-season baseflow character — no alarming declines, no significant curtailment signals in the data as of October 5.

    Seasonal Guidance

  • Contact Weber Basin Water Conservancy District (WBWCD) to request current storage status for Echo Reservoir and Rockport Reservoir — both are physically in Summit County and are the primary Weber-side storage infrastructure.
  • Kamas Valley agricultural users (hay, alfalfa, cattle, horse operations) should contact Summit Water Distribution Company regarding end-of-season delivery schedules and any early system shutdowns along the upper Provo corridor.
  • Park City Municipal Corporation maintains the Snyderville Basin municipal water system — resort economy and municipal users should check the current system status and any carry-over storage conditions heading into the snowmaking and winter season.
  • Contact Utah Division of Water Rights (waterrights.utah.gov) to verify current water right status before any changes in diversion or groundwater use in either the Snyderville Basin alluvial aquifer or the Kamas Valley alluvial aquifer.

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

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

    Data Current As Of: October 5, 2026 | Utah Division of Water Rights records current as of publication date

    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.

    Data & Disclaimers

    Sources: NRCS SNOTEL network · USGS National Water Information System · National Weather Service

    This brief provides automated analysis for informational purposes only. Consult official sources including your local water district and state Division of Water Rights for regulatory decisions. This document does not constitute legal, regulatory, or engineering advice.

    Other Issues

    Summit County Brief — October 26, 2026Summit County Brief — October 19, 2026Summit County Brief — October 12, 2026Summit County Brief — September 28, 2026Summit County Brief — September 21, 2026Summit County Brief — September 14, 2026Summit County Brief — September 7, 2026Summit County Brief — August 31, 2026Summit County Brief — August 24, 2026Summit County Brief — August 17, 2026Summit County Brief — August 10, 2026Summit County Brief — August 3, 2026Summit County Brief — July 27, 2026Summit County Brief — July 20, 2026Summit County Brief — July 13, 2026Summit County Brief — July 6, 2026Summit County Brief — June 29, 2026Summit County Brief — June 22, 2026Summit County Brief — June 15, 2026Summit County Brief — June 9, 2026

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