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Columbia’s watersheds have been studied over the years by CA, Howard County and the state of Maryland. However, it is not specific to all of Columbia. Howard County monitors the condition of its streams on a rotating basis among its watersheds using the Maryland Biological Stream Survey methods. The Columbia Watershed Management Plan draws upon those existing studies and augment our understanding with additional field assessments and analyses. The Maryland Department of Natural Resources sponsors volunteer monitoring of streams in Columbia through the Stream Waders Program.