A hundred miles from Colorado’s Front Range house-building boom, field scientist Delia Malone dug her fingers into spongy high-mountain wetlands at the edge of the Holy Cross Wilderness.
She found, about 15 inches underground, partially decayed roots, twigs and the cold moisture of a fen. These structures form over thousands of years and store water that seeps down from melting snow.
Malone has been digging about 20 holes a day, surveying fens for the U.S. Forest Service, to better understand nature’s water-storage systems — which sustain vegetation and stream flows that 40 million people across the Colorado River Basin rely on in the face of increasing aridity.
Aurora and Colorado Springs are planning to flood these wetland fens and replace natural storage with a man-made system: a $500 million dam and a reservoir that may require changing wilderness boundaries.