The USGS and Newmont Mining Corp. surveyed 38 cross sections to determine hydraulic characteristics of each of the 12 model reaches. The accuracy of the surveyed cross sections is believed to be at 0.5 ft. Field surveys included measuring the channel cross section up to the approximate altitude of the highest flood, selecting roughness coefficients, and describing auxiliary channels. Surveyed cross sections generally were at representative locations about every 3 miles along the Humboldt River channel. In areas where long overbank sections occurred, supplemental altitudes were determined from topographic maps in order to extend surveyed parts of cross sections so that each section represented the full width of the flood plain.

Click on a cross section number on the map below to view available data.