The benthic macroinvertebrates of Boomer Creek, Oklahoma, were surveyed in spring 1993, approximately four years after the complete drawdown of Boomer Lake, an impoundment of Boomer Creek. Drawdown restored the old stream channel within the lakebed to free-flowing conditions, which resulted in a temporary reestablishment of Boomer Creek through the lakebed site. Collections of invertebrates were made at eight locations in each of three stream reaches: upstream and downstream of the former impoundment, and in the stream channel within the former lakebed. Forty-three taxa were found in the stream, 33 of which occurred in the lakebed channel. Macroinvertebrate composition differed significantly among the three stream reaches, but macroinvertebrate densities did not. Dominant taxa in all areas were oligochaetes, chironomids, and a corixid predator of these groups.Trichocorixasp. Other common taxa found includedHyalella azteca. Procambarussp.,Physellasp., andSphaeriumsp. Thirteen taxa found in the lakebed channel were also found in an earlier (pre-draining) study of Boomer Lake macroinvertebrates.