Human induced changes on stream morphology and fish habitat in wadable streams are often difficult to detect. This detection is often hampered by using nonquantitative techniques to describe morphology. To aid in monitoring changes in the size and longitudinal pattern of pools along streams, the residual pool concept was developed in the 1980s. This paper evaluates two variations of a rapid field technique that quantifies residual pools. The techniques require only an overall reach slope estimate with measures of thalweg depth and wetted width at short intervals of longitudinal distance. The authors evaluated the technique on 27 stream reaches in Willamette Valley, Coast Range, and Cascade Mountains of Western Oregon, U.S.A. Residual pools in these streams were quantified using both a rapid and a more rigorous method.