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Archaeological sites deep within Grand Canyon National Park have been damaged, and lost in some cases, due to changes in the Colorado River caused by the construction of the Glen Canyon Dam.

Jan balstromMichael quinnHelen fairleyJennifer dierkerPaul simonTed woodAlan kasprakPatrick coneJoelb sankeyNational park servicePartnerships external affairsCanyon national parkGlen canyon dam adaptive management programResearch centerUs geological survey grand canyon monitoringGrand canyon