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Scope/Content: Abstract: This environmental assessment (EA) evaluates the impacts of alternatives designed to improve fish passage at Chiloquin Dam on the Sprague River in south-central Oregon. Congress provided funding to the Bureau of Indian Affairs (BIA) to study alternatives, including the removal of Chiloquin Dam, that would provide adequate upstream and downstream passage for fish (particularly the endangered shortnose and Lost River suckers) on the Sprague River. In this EA, the removal of Chiloquin Dam is considered to be the proposed action. This EA assesses the potential impacts to the environment of the proposed action and of other alternatives to providing fish passage. It also evaluates the impacts that would occur if no action was taken and the dam was not removed; this alternative is referred to as the No Action Alternative. Scope/Content: Author affiliation: Northwest Regional Office of the Bureau of Indian Affairs