More than 5,600 fish were killed in the Big Thompson River in early March. Colorado Parks and Wildlife thinks the die-off is connected to concrete chemicals entering the north fork of the Big Thompson at this construction site near Drake, Colorado.

 

Big Thompson Fish Kill Reveals Deeper Issues With Flood Recovery

Fish counts and habitat along the Big Thompson are far from restored after the 2013 floods.  

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(Grace Hood/CPR News)

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