SIOUX FALLS -- The Army Corps of Engineers said it might cancel the March surge of extra water meant to help an endangered fish in the Missouri River.
The so-called spring pulse below Gavins Point Dam is meant to replicate a natural spring rise that prompts the pallid sturgeon to spawn.
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The corps said the two-day March pulse could be canceled if the river level is already high from spring runoff. The corps said implementing a second pulse planned for May also will depend on the river level.