Front cover: On the left, photograph of a USGS hydrographer making a FlowTracker acoustic Doppler velocimeter discharge measurement at Little Eagle Creek at Speedway, Ind. (USGS station no. 03353600); on the right, photograph of a USGS hydrographer making a tethered boat acoustic Doppler current profiler discharge measurement from a cableway at the Snake River near Moran, Wyo. (USGS station no. 13011000). Back cover: In the background, 1890 black and white photograph of USGS hydrographers making a mechanical current meter discharge measurement from a cableway at the Arkansas River near Canyon City, Colo. (USGS station no. 07096000); and on the right, 1958 black and white photograph of a USGS hydrographer making a mechanical current meter discharge measurement at the Cedar River at Belgrade, Nev. (USGS station no. 06791800). For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod.
Discharge Measurements at Gaging StationsTo order this and other USGS information products, visit