Gooding County Water Intelligence Brief

August 3, 2026 | Free-Tier Edition

Situation Summary

Gooding County's water supply picture for peak irrigation season reflects a 2026 water year defined by early snowmelt rather than inadequate snowpack — mountain snowpack across the Big Wood River headwaters melted out 4–6 weeks ahead of the historical median meltout date, meaning tributary inflows to the Snake River from the Big Wood system peaked and concluded earlier in the season than normal. ESPA spring discharge, as reflected in the Malad River near Gooding, remains the most supply-stable indicator for Hagerman Valley trout aquaculture operators, with current flows reported at 120 cfs and rising. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

Both SNOTEL stations monitoring the Gooding County tributary zone have reached their normal seasonal condition for early August.

Galena Summit (490:ID:SNTL) — the primary headwaters monitor for the Big Wood River system and Gooding County's most relevant local tributary snowpack indicator — recorded 0.0" snow water equivalent (SWE) and 1.0" snow depth as of August 2. The trace snow depth reading likely reflects isolated shaded remnants rather than any meaningful water-bearing snowpack. No percent-of-median figure is reported for this date, which reflects that the median SWE for Galena Summit at this point in the calendar is also 0.0" — this station is at its normal seasonal condition for early August. The operational signal for 2026 is not current snowpack deficit but meltout timing: Galena Summit melted out approximately 4–6 weeks ahead of its historical median meltout date, meaning Big Wood River tributary contributions to the Snake River near Gooding concluded earlier in the season than normal.

Lewis Lake Divide recorded 0.0" SWE and 0.0" snow depth as of August 2 — fully bare ground, consistent with normal seasonal conditions for this date. No percent-of-median is reported, confirming the median is also 0.0" at this calendar point.

The combined picture: no snowmelt-driven water supply remains in the local tributary system. Big Wood River inflows to the Snake are now governed entirely by baseflow conditions, not snowmelt pulse.

Streamflow Conditions

Malad River near Gooding (USGS 13152500): 120 cfs, trending rising, as of August 3. This gauge is the primary indicator of ESPA spring discharge for the Hagerman Valley. Unlike snowmelt-driven streams, the Malad River carries significant outflow from the Thousand Springs complex — where the Eastern Snake Plain Aquifer discharges visibly from the Snake River canyon walls — and its flows reflect aquifer level and spring discharge rate rather than seasonal precipitation or snowmelt timing. The rising trend is a constructive signal for Hagerman Valley trout aquaculture operators, whose water supply depends on steady spring flow rather than canal deliveries. Trout farm operators should note that this gauge is their most direct real-time proxy for spring water availability; meaningful multi-week declines in Malad River flows would warrant early contact with IDWR regarding spring water right administration.

For Snake River mainstem context relevant to Gooding County canal irrigators and dairy operations, inherited gauge data from Milner Dam (13087995) and Twin Falls (13090500) provide the upstream supply reference. No active USGS Snake River gauge is located within Gooding County — the nearest downstream Snake River gauge at King Hill (13154500) is in Elmore County.

Seasonal Guidance

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Data Sources: SNOTEL data through August 2, 2026; USGS streamflow data through August 3, 2026

Data Current As Of: August 3, 2026. SNOTEL data provided by USDA Natural Resources Conservation Service (NRCS) National Water and Climate Center. Streamflow data provided by 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; 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 regulatory decisions and water rights administration. This brief does not constitute legal, regulatory, or engineering advice.