Otero County, CO — Water Intelligence Brief

Arkansas River Basin | September 28, 2026

Situation Summary

Arkansas River flows in Otero County are at late-season lows, with the Apishapa River near Fowler recording just 3 cfs and trending downward, and no recent data available at the La Junta and Rocky Ford gauges — a signal that mainstem conditions are too low or too static to register reliable readings at this stage of the season. For Fort Lyon Canal, Catlin Canal, and Holbrook Irrigation District users, this means late-season delivery margins are extremely thin as the 2026 irrigation year draws to a close. Reservoir storage data, 7-day forecast details, and canal delivery comparisons are available in the full brief.

Snowpack Conditions

Both SNOTEL stations monitoring the upper Arkansas headwaters are reporting fully exhausted snowpack as of September 27, 2026:

No percent-of-median figures are shown for either station, which reflects normal seasonal conditions for this point in the calendar — the historical median SWE for late September at these elevations is also 0.0". These readings should not be interpreted as below-normal conditions for today's date.

The critical upstream story for 2026 is meltout timing: both Brumley and Saint Elmo melted out 4–6 weeks ahead of the historical median meltout date, driven by an anomalous March heat wave. That early meltout compressed the spring runoff pulse significantly, reducing Turquoise Lake, Twin Lakes, and ultimately Pueblo Reservoir inflows well below what a normal melt season would have delivered. The snowmelt pulse has now fully ended; Pueblo Reservoir inflows are tapering toward base flow, and no further snowpack-driven recharge is expected for the 2026 irrigation season.

Streamflow Conditions

Streamflow across the Arkansas River Basin in Otero County is at its lowest effective point of the season:

The Apishapa reading of 3 cfs — and falling — reflects a tributary system operating near base flow with minimal remaining runoff contribution. The absence of recent data at both the La Junta and Rocky Ford gauges limits the ability to assess mainstem Arkansas River conditions directly or to calculate the difference between upstream and downstream readings that would indicate active Fort Lyon Canal diversions. Users should contact Fort Lyon Canal Company and Colorado Division of Water Resources, Water Division 2 (Pueblo office) for current operational status on the mainstem.

Seasonal Guidance

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

Data Sources: SNOTEL data through September 27, 2026; USGS streamflow data through September 28, 2026

Data Current As Of: September 28, 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 Eastern Colorado Area Office (Loveland, CO), Southeastern Colorado Water Conservancy District (SECWCD), and Colorado Division of Water Resources, Water Division 2 (Pueblo office) for regulatory decisions and water rights administration.