Gooding County, ID — Water Intelligence Brief

August 10, 2026 | Free-Tier Edition

Situation Summary

Gooding County enters mid-August 2026 with snowpack fully melted out across all monitored headwaters — the Galena Summit SNOTEL station melted out 4–6 weeks ahead of the historical median meltout date following an anomalous March heat wave, meaning the Big Wood River tributary system delivered its seasonal pulse earlier than normal and has been declining since. ESPA spring discharge at the Malad River near Gooding is currently flowing at 128 cfs and falling, providing the primary water supply signal for Hagerman Valley trout aquaculture operators who depend on steady spring flow rates year-round. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

Both SNOTEL stations monitored for Gooding County's tributary watersheds are reporting fully melted-out conditions as of August 9, 2026:

For both stations, the 0.0" SWE reading reflects normal seasonal conditions for this date — at this point in the calendar, median SWE is also 0.0", so no below-normal language is appropriate based on current readings alone. The meaningful signal for 2026 is the early meltout timing: tributary inflows driven by Big Wood River snowmelt are now several weeks behind the county, and no additional snowmelt-driven surface water supply is available for the remainder of the irrigation season.

Streamflow Conditions

Malad River near Gooding (USGS 13152500): 128 cfs — falling (August 10, 2026)

The Malad River near Gooding is the primary indicator of ESPA spring discharge for the Hagerman Valley. Unlike snowmelt-driven rivers, Malad River flows reflect Eastern Snake Plain Aquifer water levels and spring discharge rates from the Thousand Springs complex — the point where the ESPA becomes literally visible as massive springs emerge from the Snake River canyon walls and discharge into the river. This gauge does not respond to seasonal precipitation in the same way surface streams do; its flows are characteristically stable year-round.

The current reading of 128 cfs with a falling trend is the key operational signal for Hagerman Valley trout aquaculture operators. Commercial trout farms in the Hagerman Valley hold separate IDWR spring water appropriations and depend entirely on steady, consistent spring flow — these operations are not canal irrigators and are not affected by Milner Dam diversion scheduling. Any sustained decline in Malad River flow warrants monitoring, as trout aquaculture water demand is essentially constant year-round and cannot absorb supply variability the way field crop irrigation can.

For dairy operators and alfalfa producers receiving Snake River canal deliveries, the Milner Dam upstream context (gauges 13087995 and 13090500) governs canal delivery availability — those figures are available in the full brief.

Seasonal Guidance

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Data Sources: SNOTEL data through August 9, 2026; USGS streamflow data through August 10, 2026.

Data Current As Of: August 10, 2026.

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 for middle Snake River and tributary water rights, and 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) for upstream storage and release context and regulatory decisions and water rights administration.