Delta County, CO — Water Intelligence Brief

August 24, 2026 | Colorado River Basin (Upper)

Situation Summary

Delta County enters the final weeks of the 2026 irrigation season under a late-summer supply picture shaped primarily by an anomalous early-melt year, with all regional SNOTEL stations having melted out 4–6 weeks ahead of the historical median meltout date. Streamflows on the Gunnison, Uncompahgre, and North Fork Gunnison systems are currently stable to rising, providing near-term supply continuity for irrigators, though late-season sustainability depends on upstream regulatory releases from the Aspinall Unit. Reservoir storage data, 7-day forecast details, and depletion analysis are available in the full brief.

Snowpack Conditions

All five SNOTEL stations monitoring the watersheds that feed Delta County report essentially zero snowpack, which is the expected seasonal condition for late August — no percent-of-median figures are reported because the historical median SWE for this date is also 0.0" at these locations.

| Station | SWE | Snow Depth |

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

| Idarado | 0.0" | 2.0" |

| McClure Pass | 0.0" | 0.0" |

| Overland Reservoir | 0.0" | 0.0" |

| Park Cone | 0.2" | 0.0" |

| Park Reservoir | 0.0" | 0.0" |

The 2.0" residual depth at Idarado and a trace SWE reading at Park Cone are minor late-season anomalies and do not represent meaningful stored water. The critical 2026 snowpack story is not current conditions but meltout timing: all stations melted out 4–6 weeks ahead of the historical median meltout date, meaning the snowpack-derived pulse that typically sustains late-July and August streamflows was largely exhausted by early summer. No additional snowmelt contribution to streamflow is expected at this stage of the season.

Streamflow Conditions

Current gauge readings show moderate flows across Delta County's primary river systems, with several gauges trending upward — a modestly encouraging signal for late-season irrigators.

Colorado River near Cameo, CO: 1,530 cfs, stable. This mainstem gauge captures combined contributions from the upper Colorado and Gunnison systems and reflects broader basin conditions upstream of the county.

Gunnison River at Delta, CO: 400 cfs, stable. This is the primary supply indicator for Delta County's Gunnison River irrigators and reflects Aspinall Unit releases moving through the system. Stable flow at this volume provides near-term continuity for active diversions.

Gunnison River near Grand Junction, CO: No recent flow data available. Users dependent on this reach should contact USGS or their water district for current conditions.

North Fork Gunnison River below Paonia, CO: 13 cfs, rising. This gauge directly serves the North Fork Valley stone fruit and wine grape producers near Paonia and Hotchkiss. At 13 cfs with a rising trend, flows remain very low for the season — fruit producers and Paonia Reservoir users should monitor this gauge closely as late-season demand continues.

Uncompahgre River at Colona, CO: 176 cfs, rising. An upward trend on the upper Uncompahgre is a positive near-term signal for irrigators in the northern Uncompahgre corridor.

Uncompahgre River at Delta, CO: 362 cfs, rising. The rising trend at the Delta gauge, combining upper Uncompahgre inflows, provides additional assurance for lower valley irrigators in the short term.

The rising trend on the Uncompahgre system and stable Gunnison mainstem flows are the most actionable current readings. North Fork flows at 13 cfs remain the tightest supply constraint visible in available gauge data.

Seasonal Guidance

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Data Sources: SNOTEL data through August 23, 2026; USGS streamflow data through August 24, 2026

Data Current As Of: Colorado Division of Water Resources

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, U.S. Bureau of Reclamation (Aspinall Unit / Gunnison Basin — Blue Mesa, Morrow Point, Crystal reservoirs), and Uncompahgre Valley Water Users Association (UVWUA) for regulatory decisions and water rights administration.