Committee accepts IDWR rule changes for Water District 34 after staff presentation

Feb 9, 2026

IDWR presented minor substantive edits to water distribution rules for Water District 34 (Big Lost River Basin). The Resources & Environment committee accepted the rule docket 37‑O312‑2501 after a staff overview and brief Q&A about stock water allocation.

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Matt Anders, planning and project section supervisor at the Idaho Department of Water Resources, walked the committee through rule docket 37‑O312‑2501, a rulemaking to update water distribution rules for Water District 34 in the Big Lost River (Mackay and Arco areas). Anders said most substantive edits are limited to rule sections 10 (definitions), 25 (river reaches) and 040 (allocation of natural flow) and emphasized changes primarily clarify terminology and remove redundant text.

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