Water Intelligence Brief · Archive

Summit County, UT

September 7, 2026

Summit County, UT — Water Intelligence Brief

September 7, 2026 | Free-Tier Edition

Situation Summary

Summit County's dual headwaters role is reflected in today's gauges: the Weber River at Echo is running 245 cfs and rising, while the Provo River near Woodland is delivering 44 cfs and falling — two different trajectories leaving the county toward their respective downstream systems. For Kamas Valley irrigators along the upper Provo corridor, the falling trend at Woodland is the signal that matters most this week, as late-season hay and alfalfa demand competes with a declining supply curve. 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 (SWE) as of September 6 — a normal condition for this date, as the historical median SWE for each of these stations is also 0.0" at this point in the calendar. The operational snowpack story for 2026 is one of timing: Summit County's snowpack melted out approximately 4–6 weeks ahead of the historical median meltout date, driven by an anomalous heat event earlier in the season.

Station readings (September 6):

Beaver Divide: 0.0" SWE, 0.0" depth — upper Provo headwaters, normal seasonal condition

Trial Lake: 0.8" SWE, 0.0" depth — upper Provo headwaters; the lone non-zero SWE reading in the network, though minimal

Chalk Creek #1 / #2: Both reporting 0.0" SWE — Weber River headwaters above the Coalville drainage, normal seasonal condition

Trial Lake's 0.8" SWE reading is the only departure from full meltout across the network and does not represent meaningful late-season storage. All stations are at or near their expected September baseline. The meltout timing earlier this season — not current snowpack depth — is what shaped the summer delivery window now closing.

Streamflow Conditions

Summit County's six active USGS gauges tell a split story across the two basins.

Weber Basin:

Weber River at Echo (10132000): 245 cfs, rising — the primary integrator of upper Weber River flow entering the WBWCD reservoir system at Echo Reservoir. The rising signal here is notable and warrants attention; this gauge captures what the county is contributing to the full WBWCD storage chain.

Weber River near Coalville: 172 cfs, stable — upstream of Echo, reflecting consistent mainstem contribution from the Coalville corridor ranching area.

Weber River near Oakley: 70 cfs, falling — upper Weber headwaters above Coalville, showing the expected late-season decline at the source.

Weber River at Gateway: 137 cfs, falling — downstream indicator; the divergence between Gateway (falling) and Echo (rising) may reflect tributary or storage system dynamics not visible in this data alone.

East Canyon Creek near Jeremy Ranch: 22 cfs, rising — the Park City–side drainage feeding the East Canyon system. The rising trend is relevant to municipal planners monitoring the western Summit County supply picture.

Provo Basin:

Provo River near Woodland (10154200): 44 cfs, falling — this is Summit County's contribution to the Provo system, measuring what is leaving the county toward Jordanelle Reservoir in Wasatch County. The falling trend is the primary operational signal for Kamas Valley irrigators: late-season supply is contracting. Hay and alfalfa operations in Kamas, Oakley, Peoa, and Francis should treat this gauge as their primary weekly indicator.

Seasonal Guidance

Contact Summit Water Distribution Company to confirm current delivery schedules and any end-of-season cutoff dates for Kamas Valley agricultural users.

Check Weber Basin Water Conservancy District (WBWCD) for current Echo Reservoir and Rockport Reservoir storage status, as both in-county facilities directly reflect available system capacity heading into fall.

Park City Municipal Corporation is the contact for municipal and resort-sector users in the Snyderville Basin monitoring late-season East Canyon Creek delivery conditions.

Verify current water right priority status and any active calls on the upper Provo River with the Utah Division of Water Rights before making any changes to diversion practices this fall.

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

Data Sources: SNOTEL data through September 6, 2026; USGS streamflow data through September 7, 2026

Data Current As Of: September 7, 2026 | Compiled using NRCS SNOTEL network and USGS National Water Information System

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.

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