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This layer shows dam facilities in the Columbia River basin. This subset of the greater dams dataset is generally based on the dam being within 1/2 mile of current anadromous distribution (based on StreamNet's fish distribution data). Note that there are two other companion layers in the larger Columbia Basin Fish Facilities dataset (Major dam and Other dam) which show other categories of dams. Definition query applied to Columbia Basin Fish Facilities dataset: FacSubType = Dam AND ColumbiaBasin =1 AND FacStatus = open |