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October 22, 2025
The October rains that changed this water year in the San Luis Valley came at a particularly critical time.
In September the closely-watched unconfined aquifer hit its lowest level ever recorded since monitoring of the troubled aquifer began in January 2002, according to the Davis Engineering report given at Tuesday’s quarterly meeting of the Rio Grande Water Conservation District.
Knowing that, now imagine the conversations that would be happening in the Valley’s farming and ranching community had there been diminished or no October rains. The year was shaping up to be among the worst for flows on the Upper Rio Grande and readings on the unconfined aquifer reinforced it.
Then October delivered heavy rains across the southwest, which resulted in historic fall seasonal flows on the San Juan and into the Rio Grande and Conejos River systems. The Rio Grande grew by 80,000 acre-feet and the Conejos River by 20,000 acre-feet as a result of the rains, said Craig Cotten, division engineer for the Colorado Division of Water Resources.
Colorado is now estimating a total annual flow of 470,000 acre-feet on the Upper Rio Grande, up from its earlier estimates for the year at 390,000 acre-feet. Still, the irrigation year on the Rio Grande will likely end on Nov. 1 as scheduled, said Cotten.
“That’s a big amount of water in just a short amount of time,” he said in noting the latest accounting for Rio Grande Compact purposes.
2026 budget hearing set
The Rio Grande Water Conservation District set a 2026 budget work session for Nov. 24; then a public hearing to adopt next year’s budget on Dec. 11. The water conservation agency is proposing a year-over-year increase to its mill levy. It is proposing a 1.75 mill levy property tax, up from 1.6 mills in 2025.
