Otero County Water Intelligence Brief

Arkansas River Basin | September 7, 2026

Situation Summary

Arkansas River flows in Otero County are at critically low late-season levels, with the Apishapa River near Fowler registering just 1 cfs and falling, and no recent flow data available at the La Junta and Rocky Ford gauges — indicating that Fort Lyon Canal and Catlin Canal diversions may have drawn the mainstem to near-zero at those measurement points. With Fry-Ark imported water for 2026 forecast at approximately 10% of the 20-year average, canal deliveries this season have been severely constrained, and irrigators should treat remaining supply as effectively exhausted for the year. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

Both SNOTEL stations monitoring the upper Arkansas headwaters are at 0.0" snow water equivalent and 0.0" snow depth as of September 6, 2026:

No percent-of-median figures are shown for either station, which reflects that the historical median SWE for this date is also 0.0" — these stations are at their normal seasonal condition for early September. However, the critical 2026 context is timing: both stations melted out 4–6 weeks ahead of the historical median meltout date, driven by an anomalous March heat wave. That early meltout meant Turquoise Lake, Twin Lakes, and ultimately Pueblo Reservoir received their snowmelt pulse weeks earlier than normal, with significantly reduced volume available to carry through the summer. The snowmelt contribution to Arkansas River flows is now fully exhausted; Pueblo Reservoir inflows have tapered to base flow conditions.

Streamflow Conditions

Streamflow data across Otero County gauges reflects a severely stressed late-season supply picture:

Taken together, the gauge picture is consistent with a lower Arkansas Valley operating at or near the limit of available surface supply in early September.

Seasonal Guidance

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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, 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. Fry-Ark imported water forecast figures are sourced from USBR April 2026 project forecasts and should be confirmed directly with USBR for current operational guidance.