What is the Bureau of Reclamation doing to the dams?
Three actions are being performed to modernize all four dams, and bring them to the current state of the art of dam design and construction. First, layers of sand and gravel are being added to each dam, to allow normal seepage through the dams while preventing erosion of the dams themselves. Second, a berm of additional material is being added to the base of each dam, to stabilize it in the case of an earthquake. Finally, a clay blanket will be placed along the bottom of Horsetooth Reservoir near Horsetooth Dam. The blanket will prevent seepage from entering the limestone formation near the dam.
