Skimming of gravel bars is an important industry in Humboldt County. Concerns have been voiced that the practice could release fine sediment into the stream which could affect salmonids. For his Masters thesis, Kelley sought to collect quantitative information to inform the debate. Gravel samples were taken from five gravel bars, and sifted into size classes. Statistical analysis will be used to determine if there was a difference between pre-extraction, post-extraction, after rains, and after-inundation gravel bars. Kelley works for the Army Corps of Engineers in Eureka, CA.