Hungry Horse Dam is an arch dam on the South Fork Flathead River in the Rocky Mountains of the U.S. state of Montana. It is located in Flathead National Forest, in Flathead County, about 15mi south of the west entrance to Glacier National Park, 9mi southeast of Columbia Falls, and 20mi northeast of Kalispell. The Hungry Horse project, dam, and powerplant are operated by the United States Bureau of Reclamation. The entrance road leading to the dam is located in Hungry Horse, Montana.Dimensions and statisticsAt 564ft in height, the dam was the third largest and second highest concrete dam in the world at the time of its completion in 1953, with a volume of 3,100,000 cuyd. The dam's spillway is the highest morning glory structure in the world. The spillway is controlled by a 64by ring gate.HistoryConstruction of Hungry Horse Dam was authorized by the Act of June 5, 1944 . Construction began in April 1948 and completed in July 16, 1953. The purposes of the Hungry Horse Project authorized by law are irrigation, flood control, navigation, streamflow regulation, hydroelectric generation, and other beneficial uses such as recreation. However, no irrigation facilities were built and the project has no irrigation obligations. Hydroelectric power generation is the primary purpose of the dam today. Flood control is the dam's other main purpose. The dam, reservoir, and surrounding area are used for recreation. However the once great lower gorge lies submerged underneath.