News Article

RGDSS Model Phase 7 Response Function Update

The State Engineer has updated the Response Functions based upon the RGDSS Phase 7 model, version 7P101.  The Response Function calibration workbooks as well as the application workbooks are available on the Colorado Decision Support System RGDSS website.  The State Engineer is providing these Response Functions to Well Users withdrawing groundwater pursuant to plans specified in Rule 6.1 for use in Well Users’ 2026 plans.

New Water Measurement Rules in Effect June 1, 2025, for San Juan and Dolores River Basins

(Durango) - Starting June 1, 2025, new rules governing the measurement of surface and groundwater diversions and storage will be in effect for Division 7. The division includes the San Juan and Dolores River basins. The rules do not apply to water users who obtain their water directly from a municipal provider, rural water supplier, or a ditch company, as those entities are required to have measurement where they divert from the stream or ground.

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