Grand Valley Farmers Sacrifice Rights to Keep Upstream Towns Hydrated

The 66,000-acre-foot Historic User Pool is sitting at 15,000. It should be full. It isn’t.

That gap tells the story of a quiet crisis playing out between Grand Junction and Vail. For decades, the deal was simple. Downstream farmers in the Grand Valley held senior water rights. Upstream users in Eagle County relied on them. If the farmers didn’t need the water, they let it flow. The pool was the buffer. It was the promise that even in a drought, the people drinking water in Gypsum and Minturn wouldn’t be left high and dry.

That promise is breaking.

The pool was created after the extreme drought of 1977. Officials calculated that 66,000 acre-feet was the maximum amount of water that would ever be needed to replace agricultural and domestic depletions caused by the "Cameo call" — the most senior water right on the Colorado River, dating back to 1898. The assumption was that 1977 was the worst-case scenario. They bet that the pool would fill every single year.

It won’t fill this year. Not even close.

Nearly 300 domestic and municipal water providers in Eagle, Summit, and other Western Slope areas are covered by this pool. That includes the town of Gypsum. The town of Minturn. The Eagle County School District. The Eagle County Airport. Even the Bellyache Ridge Metro District and the Canyon Woods HOA. When the pool runs dry, these entities lose their safety net.

The Colorado River District noticed the deficit. They met with the Grand Valley irrigation districts to figure out how to keep the lights on upstream without stripping the downstream users of everything they own.

Andy Mueller, general manager of the Colorado River District, called the response "remarkably receptive." The districts didn’t just roll over. They experimented. They ran their ditches and diversion systems at the lowest possible operational levels. They sacrificed their own irrigation use to keep upstream users whole. Mueller called it "compromising their rights" in a "pretty amazing cooperative, collaborative effort."

It’s a lot of water to give up. And it’s happening while locals are being asked to tighten their own belts. The district is asking High Country residents to conserve, especially those in districts served by the Historic User Pool. It’s a double squeeze.

The financial reality is stark. The Colorado River District is using reserve money from its water enterprise fund to support the domestic supply while the pool recovers. That’s not free money. It’s a draw on reserves. It’s a signal that the system is under stress.

Read that again. The system that was designed to handle the "worst drought we’ll ever see" is failing to handle a normal year. The math doesn’t add up. The 1977 calculation assumed a static climate. The climate isn’t static. The droughts are getting deeper. The pool isn’t refilling.

Mueller noted that the districts found the lowest level where they could still operate. That’s not a theoretical limit. That’s a physical limit. You can’t pump water if the ditch is too shallow. You can’t irrigate if the diversion is too low. The farmers are taking the hit so the towns don’t have to.

But for how long?

The short version: The Grand Valley districts can call out the upstream users. They hold the senior rights. The "Cameo call" gives them the power to shut off the tap for everyone below them. They haven’t done it yet. They’re choosing cooperation over assertion. But the buffer is gone. The 66,000-acre-foot cushion has shrunk to a fraction of its size.

When the pool hits zero, the choice stops being about cooperation. It becomes about survival. And the upstream users — your neighbors, your school district, your airport, will be the ones holding the empty cup.