Gooding County Water Intelligence Brief

October 5, 2026 | Free-Tier Edition

Situation Summary

Snake River corridor deliveries and ESPA spring discharge in the Hagerman Valley are operating under late-season conditions, with the Malad River near Gooding reporting 63 cfs on a falling trend — the key real-time signal for trout aquaculture operators monitoring spring flow reliability heading into fall. Dairy operators and alfalfa producers should note that irrigation season is winding down across the Magic Valley, but year-round dairy water demands remain active against an ESPA system that ended its primary recharge season earlier than normal in 2026. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

Both SNOTEL stations reporting for Gooding County's tributary watersheds show no meaningful snowpack as of October 4, 2026 — consistent with normal early-October baseline conditions at these elevations.

Galena Summit (490:ID:SNTL): Snow water equivalent (SWE) is 0.0", with 2.0" of snow depth recorded. The trace snow depth with zero SWE reflects early-season surface conditions rather than any meaningful accumulated snowpack. No percent-of-median figure is available for this date, which indicates the historical median SWE for this calendar date is also 0.0" — Galena Summit is at its normal seasonal baseline for early October. The critical context for 2026 is timing: this station melted out approximately 4–6 weeks ahead of the historical median meltout date earlier this year, which shaped Big Wood River tributary inflows to the Snake during the critical spring and early summer runoff window. That early meltout is now a background condition, not the current story.

Lewis Lake Divide: SWE is 0.0" with 0.0" depth — fully snow-free, consistent with normal early-October conditions at this station. No percent-of-median is shown, confirming the historical median is also 0.0" for this date.

Galena Summit is the primary local tributary snowpack indicator for Gooding County, as its readings directly govern Big Wood River headwater accumulation and eventual inflow to the Snake River in the Gooding area. Meaningful snowpack accumulation at Galena Summit is not expected until November and will be the key metric to track for early indications of next season's Big Wood River tributary supply outlook.

Streamflow Conditions

Malad River near Gooding (USGS 13152500): 63 cfs, falling (October 5)

The Malad River near Gooding is the primary indicator of ESPA spring discharge for the Hagerman Valley. Unlike snowmelt-driven rivers that fluctuate sharply with seasonal conditions, the Malad carries significant discharge from the Thousand Springs complex — water that has transited the Eastern Snake Plain Aquifer system and emerges as springs from the Snake River canyon walls. Its flows are characteristically stable year-round, reflecting aquifer levels and spring discharge rates rather than short-term precipitation or snowmelt pulses.

The current reading of 63 cfs on a falling trend warrants attention from Hagerman Valley trout aquaculture operators. A falling trend in the Malad at this gauge is not typical seasonal variation in the way that snowmelt-driven systems rise and fall — it may signal shifts in ESPA spring discharge. Trout farm operators holding IDWR spring water appropriations should monitor this gauge closely and contact IDWR's Eastern Regional Office if the declining trend continues or accelerates. For dairy operators and alfalfa producers depending on ESPA groundwater, the same signal applies: stable or recovering spring discharge reflects a healthy aquifer, while a sustained falling trend is an early indicator of potential drawdown pressure.

Seasonal Guidance

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

Data Sources: SNOTEL data through October 4, 2026; USGS streamflow data through October 5, 2026

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

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, 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) for upstream context and regulatory decisions. Water rights administration questions should be directed to IDWR.