Water Intelligence Brief · Archive

Summit County, UT

September 14, 2026

Summit County, UT — Water Intelligence Brief

September 14, 2026 | Free-Tier Edition

Situation Summary

Summit County's dual headwaters role is the defining lens for this brief: what leaves this county determines what Weber Basin (Echo/Rockport → WBWCD system → Ogden and Davis County users) and the Provo River system (Woodland → Jordanelle → Wasatch County users) receive downstream. As of mid-September, streamflows across both drainages are in late-season decline, with Kamas Valley irrigators on the upper Provo corridor facing tightening end-of-season supplies and Park City municipal users managing against an extended low-recharge period. The 2026 season's anomalously early snowmelt — stations melted out 4–6 weeks ahead of the historical median meltout date — has been reshaping downstream delivery trajectories since spring, and that context now shapes how little buffer remains. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

All four in-county SNOTEL stations are reporting 0.0" snow water equivalent and 0.0" snow depth as of September 13, 2026. This is the expected seasonal condition for mid-September — the median SWE for this date at all four stations is also 0.0", so current readings reflect normal end-of-summer snowpack absence, not an anomalous deficit at this moment in the calendar.

Weber-side stations (Chalk Creek headwaters):

  • 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

    • Provo-side stations (upper Provo headwaters):

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

    • The operational significance is not today's zero reading — it is meltout timing. All four stations melted out 4–6 weeks earlier than the historical median meltout date in 2026, meaning the snowpack-driven pulse that fills Echo and Rockport Reservoirs on the Weber side and feeds the Provo River through Kamas Valley arrived and passed well ahead of schedule. No meaningful new snowpack accumulation is expected until October or later.

    Streamflow Conditions

    Six active USGS gauges provide coverage across Summit County's two drainages.

    Weber River Basin:

  • Weber River near Oakley (10128500): 68 cfs, stable (09/14). This is the uppermost Weber mainstem reading, reflecting conditions in the Oakley/Coalville agricultural reach before tributary inputs and reservoir operations take effect downstream.
  • Weber River near Coalville (10130500): 30 cfs, falling (09/14). Falling trend in the Coalville reach signals continued late-season decline along the upper Weber corridor — relevant for Coalville/Henefer ranching operations.
  • Weber River at Echo (10132000): 269 cfs, rising (09/12). The primary Weber basin integrator, measuring total upper Weber River flow entering the WBWCD reservoir system at Echo Reservoir. The rising signal at Echo warrants attention — this gauge captures the full upper watershed contribution and its trajectory directly affects Echo Reservoir inflows.
  • Weber River at Gateway (10136500): 151 cfs, stable (09/14). Downstream of Echo and Rockport, reflecting regulated releases from the WBWCD in-county reservoir system.
  • East Canyon Creek near Jeremy Ranch: 5 cfs, falling (09/12). East Canyon Creek is the Park City municipal drainage — a 5 cfs falling reading confirms very low late-season flows on the Weber side of the Park City watershed.

    • Provo River Basin:

  • Provo River near Woodland (10154200): 37 cfs, falling (09/14). This is Summit County's contribution to the Provo River system — what is leaving the county toward Jordanelle Reservoir in Wasatch County. A falling 37 cfs reading in mid-September reflects continued late-season decline. Kamas Valley irrigators drawing from the upper Provo corridor should treat this as the primary current supply indicator.

    • Seasonal Guidance

  • Contact Summit Water Distribution Company to confirm current Kamas Valley delivery schedule and any end-of-season curtailment notices for upper Provo River agricultural users.
  • Contact Weber Basin Water Conservancy District (WBWCD) for current Echo Reservoir and Rockport Reservoir storage status — both are in-county WBWCD facilities and the primary Weber-side supply indicator for the season's remaining weeks.
  • Check Utah Division of Water Rights (waterrights.utah.gov) to verify current water rights priority standing before any changes to diversion timing or volume on either the upper Provo or upper Weber drainages.
  • Contact Park City Municipal Corporation for current municipal supply status and any demand management programs affecting the Snyderville Basin and East Canyon Creek corridor.

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

    Data Sources: SNOTEL data through September 13, 2026; USGS streamflow data through September 14, 2026.

    Data Current As Of: September 14, 2026. Utah Division of Water Rights records current as of date of publication.

    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 — October 5, 2026Summit County Brief — September 28, 2026Summit County Brief — September 21, 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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