The USGS HUC8 watershed and mean and range of valley widths, gradients, upstream drainage area, estimated 2-year flood magnitude, estimated stream power magnitude at 2-year flood, and dam densities covered by sites (note at least 2 surveys at all sites; n = 77 surveys). Note all sites were surveyed for a “dammed” and “undammed” condition, hence dam density was only recorded for the dammed condition.

The USGS HUC8 watershed and mean and range of valley widths, gradients, upstream drainage area, estimated 2-year flood magnitude, estimated stream power magnitude at 2-year flood, and dam densities covered by sites (note at least 2 surveys at all sites; n = 77 surveys). Note all sites were surveyed for a “dammed” and “undammed” condition, hence dam density was only recorded for the dammed condition.