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Low, steady flows from Arizona dam could benefit bugs

FLAGSTAFF, Ariz. (AP) — Water has rushed through the Grand Canyon to build sandbars and spawning areas for native fish.


Soon, the water that flows from Glen Canyon Dam on the Arizona-Utah border will be low and steady to benefit bugs.

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Scientists hope a months-long experiment that starts this weekend will lead to a 26 percent increase in black flies and midges, and the return of bigger bugs.


Fluctuations in the water for hydropower create artificial tides that expose bug eggs and dry them out.


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Scientists say keeping the flows low and steady over the weekends will give eggs laid below the water's surface a better chance at survival.


The so-called bug flows are part of a larger plan approved in late 2016 to manage Glen Canyon Dam for various resources.