Figure 3. The diverse character of the streambed in the Miller Creek watershed, Montana: A. Upper study reach (site 190) where the channel is composed of gravel and cobbles. B. Near mid-basin (site 7,120) where the channel is composed mostly of large cobbles and scattered boulders. C. Near the downstream end of the lower study reach (site 14,505) where a small waterfall exists on exposed bedrock. D. At the downstream end of the study reach (site 14,930) where the channel is composed of cobbles, boulders, and woody debris. Photographs A and D by D.A. Nimick; photographs B and C by J.H. Lambing, U.S. Geological Survey.