HR3857-119

What This Bill Does

H.R.3857, the Snow Water Supply Forecasting Reauthorization Act of 2025, would update the existing Interior Department program under 43 USC 1477. The House-passed text authorizes $3 million for each fiscal year from 2027 through 2031, totaling $15 million. Existing law authorizes $15 million in the aggregate for 2022-2026. This renews the same nominal five-year total for a later period while specifying annual amounts; it is not a $15 million annual appropriation. The proposal remains pending and was placed on the Senate calendar on September 17, 2026.

The Interior Secretary, acting through the Bureau of Reclamation for federal water forecasts and allocations, would emphasize integrated, accurate, timely and spatially complete snowpack measurements and models. Specified technologies include airborne laser altimetry, imaging spectroscopy, and physics-based snowpack and hydrologic modeling. The existing greatest-extent-practicable qualification remains. The Secretary could use other technologies suited to operational water-management needs. NOAA and the Natural Resources Conservation Service would be expressly named in the existing federal coordination requirement.

Who Benefits and How

Water districts and irrigation districts could use better-integrated snow and water-supply forecasts to inform storage, irrigation and allocation decisions. State water agencies could benefit from information relevant to river basins and interstate water management. Federal water contractors are the expressly identified users of the forecast and allocation framework. Benefits depend on implementation and forecasting performance; the bill does not award additional water rights or guarantee greater precipitation or deliveries.

Snowpack measurement providers and hydrologic-modeling companies could have continued program opportunities if Congress appropriates money and the Department makes awards. Universities and other program partners could participate in capacity-building and technical work through existing authorities. No provider receives a named award, and the bill preserves rather than newly creates existing cooperative-agreement, cost-sharing and matching-fund authorities.

Who Bears the Burden and How

Interior Department and Bureau of Reclamation staff would carry out the updated integration, coordination, partner-capacity and reporting work. NOAA and Natural Resources Conservation Service staff are expressly included as coordination partners, but coordination with relevant federal agencies is already required by current law. Program partners could incur participation or cost-sharing expenses under particular agreements; the bill imposes no universal new fee or matching percentage on them.

The bill removes the already-dated October 1, 2021 emerging-technologies report and statutory language making implementation contingent on that report. It replaces the older emphasis on basins without activities as of December 2020 and technology demonstrations with responsiveness to weather and watershed conditions, real-time forecast integration, useful basin-level data and partner capacity. It resets the implementation-report deadline to four years after this reauthorization is enacted and calls for applications, outcomes and data resources, while dropping the separate sub-basin listing language. This is not an annual report.

No actual appropriation is made, and obligations to comply with federal and State environmental laws remain. Funding also declined during consideration: the introduced amendment would retain the $15 million figure while making it annual for 2027-2031, the reported bill specifies $6.5 million annually, and the House-passed text reduces that to $3 million annually. These are changes between proposed authorizations, not cuts to money already appropriated.

Key Provisions

• Authorizes $3 million annually for fiscal years 2027-2031, subject to future appropriations.
• Requires emphasis on integrated snowpack measurements and models, including laser altimetry, imaging spectroscopy and physics-based modeling.
• Expands the program focus to real-time forecasts, changing watershed conditions, interstate management information and partner capacity.
• Requires an updated implementation report within four years of enactment and removes the outdated 2021 report prerequisite.
• Preserves existing cooperative agreements, information sharing, matching-fund authority and environmental-law obligations.