Montrose County Water Intelligence Brief

October 12, 2026 | Colorado River Basin (Upper)

Situation Summary

Streamflows across Montrose County's primary supply system are at late-season levels, with the Gunnison River Below Gunnison Tunnel running at 207 cfs (stable) and the Uncompahgre River at Colona holding at 64 cfs (stable) — conditions consistent with the tail end of irrigation season as most UVWUA deliveries wind down. The Colorado River near Cameo is reading 1,280 cfs and rising, reflecting broader basin drainage as the system transitions into fall. Reservoir storage data for Blue Mesa and Ridgway reservoirs, along with 7-day forecast details and delivery outlook analysis, are available in the full brief.

Snowpack Conditions

All four SNOTEL stations reporting for Montrose County's contributing watersheds show snowpack at early October baseline levels — consistent with normal seasonal conditions for this date, not an anomaly relative to median.

| Station | SWE | Snow Depth |

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

| Columbine Pass | 0.2" | 0.0" |

| Idarado | 0.1" | 0.0" |

| Mc Clure Pass | 0.1" | 0.0" |

| Park Cone | 0.0" | 0.0" |

No percent-of-median figures are reported for these stations, which indicates the historical median SWE for this date is also at or near 0.0" — these readings reflect normal early October conditions, not a snowpack deficit. The relevant 2026 snowpack story is timing: contributing basins melted out approximately 4–6 weeks ahead of the historical median meltout date earlier this year, a condition that shaped this season's streamflow and storage trajectory and is now captured in current Blue Mesa and Ridgway storage levels. Snowpack accumulation for the 2026–27 season is just beginning; meaningful basin-wide SWE readings are not expected until November or December.

Streamflow Conditions

Gunnison River Below Gunnison Tunnel (USGS 09128000): 207 cfs — stable

This is the primary delivery indicator for the Uncompahgre Project. At 207 cfs, the Tunnel is moving water at a rate consistent with late-season irrigation demand as the growing season concludes. Stable trend suggests no immediate disruption to current delivery operations. UVWUA irrigators receiving Tunnel-sourced water should monitor this gauge through the close of the 2026 delivery season.

Uncompahgre River at Colona: 64 cfs — stable

The Uncompahgre mainstem is running at a low but stable late-season rate. Direct Uncompahgre River users — particularly those below Ridgway Reservoir — should note that Ridgway operations and any active calls under Water Division 4 administration will govern available supply at this point in the season.

Colorado River near Cameo: 1,280 cfs — rising

The mainstem Colorado is rising, likely reflecting fall precipitation and reduced upstream consumptive use as the irrigation season closes. This is a basin-level indicator rather than a direct supply variable for most Montrose County irrigators.

Gunnison River near Grand Junction: No recent flow data available.

Plateau Creek near Cameo: No recent flow data available.

Seasonal Guidance

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 | 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 — Blue Mesa, Morrow Point, Crystal reservoirs governing Gunnison Tunnel delivery; and Ridgway Reservoir on the Uncompahgre), and Uncompahgre Valley Water Users Association (UVWUA) for regulatory decisions and water rights administration.