The Samuel Dam is located along the Jamari River in Rondônia, Brazil.
These Landsat images show the area in 1984, shortly after construction of the hydroelectric dam began, and in 2011. The reservoir flooded the upstream forest and displaced many people. Also evident in the images is the deforestation that has affected much of the region.
The nearly 40 years of Landsat images allow for documentation of many broad-scale changes on Earth, and increasingly enable the forecasting of change into the future.