Water Intelligence Brief

Bear Lake County, ID — Bear River Basin | June 3, 2026

1. Situation Summary

Bear Lake County is entering the 2026 irrigation season under significantly stressed water supply conditions. Snowpack across the Bear River Basin has largely disappeared, with nearly all monitored SNOTEL stations recording zero or near-zero snow water equivalent as of June 2. The 2026 season has been characterized as one of the worst snow years on record in the Mountain West, with an extreme March heat wave driving exceptionally early snowmelt and leaving the basin well below normal seasonal storage heading into summer. Streamflows in the Bear River system are currently moderate and largely stable, but with the snowmelt pulse effectively over, flows are expected to depend increasingly on stored water releases and base flow conditions. Agricultural users should treat this as a high water-stress year and act accordingly.

2. Snowpack Conditions

Snowpack conditions across the Bear River Basin are critically depleted for early June. As of June 2, 2026:

- Bear River RS: 0.0" SWE, 0.0" depth

- Emigrant Summit: 0.1" SWE, 0.0" depth

- Franklin Basin: 0.5" SWE, 3.0" depth — the only station with any meaningful remaining SWE in the monitored network

- Garden City Summit: 0.0" SWE, 1.0" depth

- Giveout: 0.3" SWE, 0.0" depth

- Slug Creek Divide: 0.0" SWE, 0.0" depth

- Tony Grove Lake: 0.0" SWE — 0% of the 3.2" median for this date

- USU Doc Daniel: 0.0" SWE — 0% of the 13.9" median for this date

Tony Grove Lake and USU Doc Daniel, which report percent-of-median values, both stand at 0% of normal — a stark indicator of basin-wide snowpack deficit. Franklin Basin's residual 0.5" SWE represents the only meaningful remaining snowpack in the monitored network. No significant snowmelt-driven runoff contribution should be anticipated from basin headwaters going forward this season.

3. Streamflow Conditions

Bear River Basin streamflows as of June 3, 2026 are moderate but mixed in trend:

- Bear River at Border, WY: 214 cfs (stable)

- Bear River at Pescadero, ID: 915 cfs (stable)

- Bear River near Corinne, UT: 920 cfs (rising)

- Logan River above State Dam, near Logan, UT: 303 cfs (stable)

- Blacksmith Fork above Upper and Lower Canal Co.'s Dam near Hyrum, UT: 66 cfs (stable)

- Little Bear River at Paradise, UT: 34 cfs (stable)

- Malad River near Bear River City, UT: 6 cfs (last recorded 05/15 — treat as data gap)

The main stem Bear River shows stable flows at Pescadero and a rising signal near Corinne, which may reflect reservoir operations or basin-wide drainage contributions rather than continued snowmelt. The significant difference between the Border, WY reading (214 cfs) and Pescadero, ID (915 cfs) reflects tributary and reservoir system contributions through the basin mid-reach. The Malad River reading is now nearly three weeks old and should be treated as a data gap. With snowpack effectively exhausted, sustained streamflow going forward will depend heavily on reservoir releases and groundwater base flow contributions.

4. Key Reservoir Systems

The primary reservoir systems relevant to Bear Lake County agricultural water users are:

- Bear Lake — the dominant regional multi-year storage facility for the Bear River system, managed under FERC license P-20 by PacifiCorp in coordination with the Bear River Commission. Bear Lake serves as the backbone of long-term water supply buffering for the basin. For current storage status, contact the Bear River Commission or PacifiCorp directly.

- Montpelier Reservoir — a smaller local storage facility on Montpelier Creek serving more localized agricultural water needs in the county.

Agricultural users relying on either facility should contact their water delivery organizations for current storage status and anticipated delivery schedules.

5. Water Rights Administration Outlook

Given critically depleted snowpack and the expectation that natural streamflow will decline through the summer months without snowmelt support, water rights curtailment risk for Bear Lake County is elevated for the 2026 irrigation season. Under Idaho's prior appropriation system, junior water right holders face a high likelihood of curtailment if streamflows fall below levels needed to satisfy senior rights.

Users with relatively junior priority dates on Bear River tributaries or groundwater sources should review their water right priority dates and delivery contracts now, maintain close communication with the Idaho Department of Water Resources (IDWR) Eastern Regional Office in Pocatello ((208) 525-7161), and not assume that current moderate streamflow levels will persist through peak irrigation demand in July and August.

The Bear River Commission coordinates multi-state water allocation across Idaho, Utah, and Wyoming, and compact obligations may influence available supply for Idaho users during low-flow periods.

6. Groundwater Considerations

Bear Lake County groundwater users fall within the Bear River Groundwater Management Area (Bear River GWMA), designated in 2001 by IDWR. The relevant aquifer system is the Bear River Valley alluvial aquifer. In low surface-water years, pressure on groundwater resources typically increases as irrigators seek supplemental supply — a pattern that can accelerate aquifer drawdown and complicate water rights administration.

Groundwater users are reminded to verify their water rights status with IDWR before expanding pumping. Increased groundwater extraction during a low surface-water year can trigger regulatory scrutiny under Idaho's conjunctive management rules, which recognize hydraulic connectivity between surface water and shallow alluvial aquifers.

7. Management Recommendations

Immediate Actions (Now through June)

Planning Actions (June through July)

Efficiency Actions (Ongoing)

8. Historical Context

The 2026 season draws comparison to several historically challenging low-snowpack years in the Mountain West. The 2021 drought year produced significant curtailments across Idaho and Utah river basins, forcing widespread agricultural adjustments and emergency water-sharing agreements. The 2015 drought year — one of the driest on record for many western watersheds — resulted in curtailments, reduced reservoir carryover, and difficult allocation decisions for junior right holders across the Bear River system. The 1977 drought, one of the most severe of the 20th century in the Mountain West, required emergency measures across the region and remains a benchmark for worst-case low-water planning.

The 2026 season's combination of record-low snowpack and an early melt pulse places it in comparable company. Agricultural users who navigated 2021 and 2015 with proactive conservation and communication strategies fared better than those who waited for formal curtailment notices before adjusting operations.