Quake Lake. The lack of a reliable water outlet for this new lake forced one of the largest mobilizations of the U.S. Army Corps of Engineers ever commenced in the western U.S. Before the new landslide was breached by the quickly rising waters, a spillway was constructed to ensure erosion and potential failure of the natural dam would be minimized. Visitors center In 1967, the U.S. Forest Service's Earthquake Lake Visitor Center opened its doors for the first season of operation. The center provides interpretive services for more than 50,000 visitors annually. The center provides a panoramic view of the mountain that fell and the lake that was formed. This facility hosts interpretive displays on earthquakes, plate tectonics, and a working seismograph. It is located in Custer Gallatin National Forest. References External links Quake Lake Bathymetric Map Montana Fish, Wildlife & Parks Lakes of Montana Earthquakes in Montana Bodies of water of Gallatin County, Montana Lakes of Madison County, Montana Natural disasters in Montana Natural history of Montana Geology of Montana 1959 natural disasters 1959 natural disasters in the United States Gallatin National Forest Landslide-dammed lakes 1959 establishments in Montana