Colorado Water Trust working to marry instream flow protection and ranch production on Little Cimarron River

Colorado Foundation for Water Education, March 12, 2015



By: Zach Smith

When standing on the ranch, you can’t quite see the river. If it’s a good autumn, the snowy peaks of the San Juan Mountains within the Uncompahgre Wilderness Area backstop the narrow valley to the south, and the tops of the turning cottonwoods peek out of a ravine to the west. Just standing there among the cow pies you’d suspect, and be correct, that the river nearby but just out of sight is renewed by those melting snows each spring. The cottonwoods betray the river’s path below the ranch.

During most springs, runoff on the Little Cimarron River that meanders through those cottonwoods fills each water right’s claim to its flows to the brim and then some. Water taken out at the McKinley Ditch headgate upstream winds along the steep slopes and eventually to this tableland, where acres irrigated since federal government patent and first appropriation in 1886 produce hay and cattle. Back at the river, water flows down the Little Cimarron to the Cimarron and eventually to the Gunnison River, upstream of Black Canyon of the Gunnison National Park, and then, finally, to the Colorado River.

As the summer turns to fall, though, the Little Cimarron can often run dry for more than a mile as the mountains stop producing water and diversions from the river lap the very last drops from the stream. Fish, both upstream and down, lose passage or get trapped in pools in the middle.

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Related Project: Little Cimarron River