Gooding County Water Intelligence Brief

October 12, 2026 | Free-Tier Edition

Situation Summary

Snake River canal deliveries are winding down for the 2026 irrigation season, and ESPA spring discharge — the lifeblood of Hagerman Valley trout aquaculture — is the primary water supply variable to monitor as the system transitions into the off-season. The Malad River near Gooding is reporting 0 cfs as of October 12, a reading that warrants direct follow-up with IDWR to confirm whether this reflects a gauge anomaly, seasonal low-flow conditions, or a meaningful shift in ESPA spring discharge. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

Both SNOTEL stations reporting for the Gooding County region show essentially no snow water equivalent (SWE) as of October 11 — a normal condition for this date in the calendar year. Galena Summit (the primary headwaters indicator for the Big Wood River system) shows 0.0" SWE with 2.0" of snow depth, indicating a trace early-season snowfall that has not yet accumulated meaningful water content. Lewis Lake Divide shows 0.1" SWE with 0.0" recorded depth. No percent-of-median figures are reported for either station, meaning the median SWE for this date is also effectively 0.0" — both stations are at normal seasonal condition for mid-October, not below normal. As background context, the 2026 season was defined by an anomalous March heat wave that drove snowpack meltout 4–6 weeks ahead of the historical median meltout date across the region, shaping the entire irrigation season's supply trajectory. The Galena Summit station is the primary local tributary snowpack indicator for the Big Wood River, which enters the Snake River in the Gooding-area corridor — its winter accumulation will directly govern Big Wood tributary inflows to the Snake beginning in spring 2027.

Streamflow Conditions

The Malad River near Gooding (USGS 13152500) — the primary indicator of ESPA spring discharge for the Hagerman Valley — is reporting 0 cfs with a falling trend as of October 12. This reading is unusual and warrants attention. The Malad River carries discharge from the Thousand Springs complex, where the Eastern Snake Plain Aquifer emerges visibly from the Snake River canyon walls. Unlike snowmelt-driven streams, Malad River flows are relatively stable year-round, reflecting ESPA aquifer levels rather than seasonal precipitation — a sudden drop to 0 cfs is not a normal seasonal pattern for this system. Dairy operators and Hagerman Valley trout aquaculture operators dependent on steady spring water flows should contact IDWR directly to determine whether this reading reflects a gauge malfunction or an actual discharge condition.

Seasonal Guidance

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Data Sources: SNOTEL data through October 11, 2026; USGS streamflow data through October 12, 2026

Data Current As Of: NRCS SNOTEL network (2 stations), USGS National Water Information System (1 gauge), National Weather Service seasonal outlooks

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, Idaho Department of Water Resources (IDWR — administers Water District 36, the middle Snake River and tributary water rights; also administers separate spring water appropriations for Hagerman Valley trout aquaculture and dairy operations), Idaho Department of Fish and Game (co-manages Thousand Springs State Park area), and U.S. Bureau of Reclamation, Pacific Northwest Region (Boise office — upstream context) for regulatory decisions and water rights administration.