Water Intelligence Brief · Archive

Summit County, UT

October 12, 2026

Summit County, UT — Water Intelligence Brief

October 12, 2026 | Free-Tier Edition

Situation Summary

Streamflows across both of Summit County's watersheds are rising as of October 12 — the upper Provo River near Woodland is running at 146 cfs and the Weber River near Oakley is at 214 cfs, signals that early autumn precipitation is moving through the county's headwaters in both basins. For Kamas Valley irrigators, late-season hay and forage deliveries are winding down, and the rising Provo River flow reflects improving conditions rather than active demand pressure. On the Weber side, Echo Reservoir — Summit County's in-county storage facility at the top of the WBWCD system — is receiving inflow from a Weber River mainstem running at 18 cfs at Echo, a lower figure that reflects upstream routing through the Oakley reach. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

Summit County's four in-county SNOTEL stations are reporting early-October conditions consistent with the seasonal baseline — no meaningful snowpack has accumulated yet at most sites.

  • Beaver Divide (330:UT:SNTL): 0.0" SWE, 0.0" depth. No snow on the ground. This station monitors upper Provo River headwaters terrain; at this date, 0.0" reflects normal seasonal conditions, not a deficit.
  • Trial Lake (828:UT:SNTL): 1.0" SWE, 0.0" depth. This is the only station showing any meaningful water equivalent, suggesting localized early accumulation — though depth reading of 0.0" warrants attention for data consistency. Trial Lake monitors the upper Provo basin and is a home station for Summit County snowpack tracking.
  • Chalk Creek #1 (392:UT:SNTL, ~9,160 ft): 0.2" SWE, 3.0" depth. The primary Weber-side headwaters snowpack indicator for the Coalville-area upper Chalk Creek drainage is showing a small early accumulation with some measurable snow depth — a modest but non-zero early signal.
  • Chalk Creek #2 (393:UT:SNTL, ~8,200 ft): 0.1" SWE, 0.0" depth. Trace moisture at the lower Chalk Creek elevation; depth reads zero, consistent with very light early-season conditions.

    • No percent-of-median figures are available for these stations at this date, indicating the median SWE for October 11 is also effectively 0.0" — these readings reflect normal seasonal conditions rather than a snowpack deficit. Important background context: the 2026 water year was marked by an anomalous March heat wave that caused snowpack across the Mountain West to melt out 4–6 weeks ahead of the historical median meltout date. That early-melt story shaped the spring and summer supply picture; accumulation for the 2027 water year is now just beginning.

    Streamflow Conditions

    Summit County sits at the top of two river systems, and current gauge readings reflect what is leaving the county toward downstream storage and delivery infrastructure.

    Weber Basin:

  • Weber River near Oakley (10128500): 214 cfs, rising. The upper Weber mainstem above the reservoir system is running at a robust autumn level, reflecting recent precipitation inputs into the Kamas-to-Oakley reach.
  • Weber River at Echo (10132000): 18 cfs, falling. This gauge measures total upper Weber flow entering Echo Reservoir — the county's primary in-county WBWCD storage facility. The contrast between Oakley (214 cfs) and Echo (18 cfs) reflects reservoir capture and routing through the upper system.
  • Weber River near Coalville (10130500): 42 cfs, rising. The Coalville reach on the upper Weber is trending upward, consistent with autumn recharge in the ranching corridor serving Coalville and Henefer area operations.
  • East Canyon Creek near Jeremy Ranch (10130500): 37 cfs, rising. The Park City side of the Weber basin is showing rising flow on East Canyon Creek, which feeds the East Canyon drainage and the broader WBWCD system west of Park City.
  • Weber River at Gateway (10133800): 130 cfs, rising. Downstream of the Summit County reservoir system, the Weber is rising — consistent with releases and tributary contributions moving through the corridor.

    • Provo Basin:

  • Provo River near Woodland (10154200): 146 cfs, rising. This is Summit County's primary contribution to the Provo River system — measuring what leaves the county before the river enters Jordanelle Reservoir in Wasatch County. A rising 146 cfs in mid-October is a healthy late-season reading for Kamas Valley context and suggests autumn precipitation is actively recharging the upper Provo corridor.

    • Seasonal Guidance

  • Contact Weber Basin Water Conservancy District (WBWCD) to request current storage status for Echo Reservoir and Rockport Reservoir, both of which are physically located in Summit County and are the primary in-county Weber basin storage facilities.
  • Kamas Valley hay and alfalfa irrigators should contact Summit Water Distribution Company to confirm end-of-season delivery scheduling and any carry-over obligations before winter shutoff.
  • Park City municipal water managers and resort-economy stakeholders should contact Park City Municipal Corporation for current municipal system status and snowmaking water storage outlook heading into the 2026–27 season.
  • Provo River Water Users Association is the point of contact for upper Provo River allocation questions relevant to Kamas, Oakley, Peoa, and Francis area agricultural users as the 2026 irrigation season closes.

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

    Data Sources: SNOTEL data through October 11, 2026; USGS streamflow data through October 12, 2026

    Data Current As Of: October 12, 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.

    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 5, 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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