Center for Environmental Reporting

thumbnail 1 USGSHyrdophones KW

By Kathleen M. Wong

It’s a cold morning in early February, and Chris Vallee of the U.S. Geological Survey is motoring upriver along Steamboat Slough. His two-man crew is hunched in the bow with backs to the wind, wrapped to the ears in water-resistant jackets above warm layers. Vallee pilots the vessel in relative comfort behind the shelter of the windscreen.

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