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Sediment buildup has reduced the water storage capacity of Tuttle Creek Lake by about half since its completion in 1962.

The U.S. Army Corps of Engineers is testing a new water injection dredging technique to clear out the accumulated mud.

This method uses underwater jets to loosen sediment, hoping it will flow out of the dam and downstream.

Scientists will monitor the pilot project for its effectiveness and potential environmental impacts on the rivers downstream.

Picture three-and-a-half football fields with earth piled onto them — piled as tall as the Empire State Building.

That’s how much sediment flows into Tuttle Creek Lake each year. After decades of this, mud has eaten up so much space that about half of the lake near Manhattan has disappeared.

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