Photo de stock - Gunnison, Colorado - Carol Soell, a boat inspector at Curecanti National Recreation Area, checks boats entering and leaving Blue Mesa Reservoir for invasive species. Colorado's mandatory inspection program aims to keep zebra and quagga mussels, New Zealand mudsnails, Eurasian Watermilfoil, rusty crayfish, and waterfleas out of the state's waters.

Photo de stock: Gunnison, Colorado - Carol Soell, a boat inspector at Curecanti National Recreation Area, checks boats entering and leaving Blue Mesa Reservoir for invasive.

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