This is a list of dams in Idaho that have been removed as physical impediments to free-flowing rivers or streams.
Removals by watershed
Clearwater River
The Grangeville Dam was a long arched concrete hydroelectric dam on the South Fork Clearwater River. The dam was removed in the interest of fish passage and since the hydropower facilities had become obsolete. It was destroyed by dynamite at 6:35 PM on August 19, 1963, following two prior detonations that day which had failed to collapse the structure. At the time, the dam was the largest ever to be removed, a record which stood for decades.
Built in 1927, the tall Lewiston Dam on the main Clearwater River was demolished in 1973 to make way for Lower Granite Lake, the slack water pool behind Lower Granite Dam.
Completed removals Dam Height Year removed Location Watercourse Watershed Cove Dam 2006 Grace Bear River Bear River Dip Creek Dam Ketchum Dip Creek Big Wood River Lindernam Dam Fremont County Milk Creek Boise River Lewiston Dam 1973 Lewiston Clearwater River Clearwater River Grangeville Dam (Harpster Dam) 1963 Idaho County South Fork Clearwater River Dutch Flat Dam 2013 Troy West Fork Little Bear Creek Unnamed ford (Road 5440) 2009 Clearwater National Forest Independence Creek Lane Dam Boundary County Elkhorn Gulch Kootenai River Timber Creek Dam 1970 Salmon–Challis National Forest Middle Fork Little Timber Creek Lemhi River Pancheri Diversion Dam 2010 Howe Little Lost River Little Lost River High Plains Estates 2013 Eagle Tributary to Farmers Union Canal Payette River Browns Pond - Cruzen McCall Lake Fork Malony Lake Dam 1986 Payette National Forest South Fork Lake Fork Colburn Mill Pond Dam 1999 Sandpoint Colburn Creek Pend Oreille River Red Ives Dam 2021 Shoshone County Red Ives Creek Saint Joe River Buster Lake Dam Challis Garden Creek Salmon River Sunbeam Dam 1931 Sawtooth National Forest Salmon River Kshmitter Dam 1988 Tributary to John Day Creek Hoffman Duffy Dam 2014 Mountain Home Tributary to Rattlesnake Creek Snake River Kunkel Dam 1994 Twin Falls Soldier Creek Watts Lake Dam Nez Perce County Hatwai Creek Teton River Packsaddle Dam 1916 Tetonia North Fork Packsaddle Creek
References