Lake vital to millions falls within just 9 metres of danger
Lake Powell is one of the most important bodies of water in the western United States
Conditions have gone from bad to worse as a severe drought grips the western United States.
Millions of residents throughout the region receive electricity generated by the dam that creates Lake Powell on the Colorado River.
Dwindling water supplies have pushed Lake Powell’s pool elevation to the lowest point ever observed, placing the lake’s elevation just about 9 metres above the point at which it can no longer generate power.
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The least-snowy winter on record for a vast swath of the western U.S. came home to roost this summer as water supplies quickly dry up throughout the region.
Heavy monsoon rains have helped in some locations, but widespread drought continued through the middle of August.
Las Vegas and Phoenix have both seen less than 25 per cent of their normal year-to-date precipitation by Aug. 18, while that number stands between 60-70 per cent farther north toward Salt Lake City and Denver.
Lake Powell is at the forefront of this slow-motion crisis. Located along the Colorado River in southern Utah, this body of water provides drinking water and hydroelectric power to many communities throughout the region.
The lake’s pool elevation fell to 1072.75 metres on Tuesday, Aug. 18, marking the lowest elevation ever observed since the lake filled to capacity in 1980. The minimum pool elevation required for electric generation is 1064 metres.
Tuesday’s measurement marks the second time in a decade that water levels in Lake Powell have fallen dangerously low due to long-term drought conditions. The previous all-time low pool elevation was 1072.87 metres set on Apr. 13, 2023.
A typical year sees Lake Powell’s average pool elevation fall to its lowest point of around 1103 metres during the middle of April, with an average elevation of about 1108 metres by this point in the summer.
Water provided by the Colorado River is vital to sustaining both agriculture and residential life in this arid part of the world. Seven western states divide the river’s supply through a complex series of laws and agreements.
The current U.S. presidential administration recently proposed dramatic cuts to these states' water consumption over the next decade, prompting objections and legal threats from local officials.