1 Oahe USACE-Omaha Detailed profile 786.1 MW Conventional Hydroelectric USACE-Omaha Hughes County 2 Garrison USACE-Omaha Detailed profile 583.4 MW Conventional Hydroelectric USACE-Omaha Mercer County 3 Big Bend Dam USACE-Omaha Detailed profile 538.3 MW Conventional Hydroelectric USACE-Omaha Buffalo County 4 Fort Randall USACE-Omaha Detailed profile 280 MW Conventional Hydroelectric USACE-Omaha Charles Mix County 5 Yellowtail U S Bureau of Reclamation 278.2 MW Conventional Hydroelectric U S Bureau of Reclamation Big Horn County 6 Salina Grand River Dam Authority Detailed profile 259.2 MW Hydroelectric Pumped Storage Grand River Dam Authority Mayes County 7 Mount Elbert U S Bureau of Reclamation 200 MW Hydroelectric Pumped Storage U S Bureau of Reclamation Lake County 8 Morrow Point U S Bureau of Reclamation 173.2 MW Conventional Hydroelectric U S Bureau of Reclamation Montrose County 9 Fort Peck USACE-Omaha 162.4 MW Conventional Hydroelectric USACE-Omaha McCone County 10 Flaming Gorge U S Bureau of Reclamation 151.8 MW Conventional Hydroelectric U S Bureau of Reclamation Daggett County 11 Gavins Point USACE-Omaha Detailed profile 132.3 MW Conventional Hydroelectric USACE-Omaha Cedar County 12 Pensacola Grand River Dam Authority Detailed profile 129.6 MW Conventional Hydroelectric Grand River Dam Authority Mayes County 13 Markham Grand River Dam Authority 128.4 MW Conventional Hydroelectric Grand River Dam Authority Mayes County 14 Broken Bow Dam USCE-Tulsa District 100 MW Conventional Hydroelectric USCE-Tulsa District McCurtain County 15 Flatiron U S Bureau of Reclamation 94.5 MW Hydroelectric Pumped Storage, Conventional Hydroelectric U S Bureau of Reclamation Larimer County 16 Blue Mesa U S Bureau of Reclamation 86.4 MW Conventional Hydroelectric U S Bureau of Reclamation Gunnison County 17 Keystone Dam USCE-Tulsa District 70 MW Conventional Hydroelectric USCE-Tulsa District Tulsa County 18 Fremont Canyon U S Bureau of Reclamation 66.8 MW Conventional Hydroelectric U S Bureau of Reclamation Natrona County 19 Canyon Ferry U S Bureau of Reclamation 57.6 MW Conventional Hydroelectric U S Bureau of Reclamation Lewis and Clark County 20 Seminoe U S Bureau of Reclamation 51.6 MW Conventional Hydroelectric U S Bureau of Reclamation Carbon County 21 Kingsley Central Nebraska Pub P&I Dist Detailed profile 50 MW Conventional Hydroelectric Central Nebraska Pub P&I Dist Keith County 22 Columbus Loup River Public Power Dist 45.6 MW Conventional Hydroelectric Loup River Public Power Dist Platte County 23 Estes U S Bureau of Reclamation 45 MW Conventional Hydroelectric U S Bureau of Reclamation Larimer County 24 Alcova U S Bureau of Reclamation 41.4 MW Conventional Hydroelectric U S Bureau of Reclamation Natrona County 25 Pole Hill U S Bureau of Reclamation 38.2 MW Conventional Hydroelectric U S Bureau of Reclamation Larimer County 26 Glendo U S Bureau of Reclamation 38 MW Conventional Hydroelectric U S Bureau of Reclamation Platte County 27 Kaw Hydro Oklahoma Municipal Power Authority 37 MW Conventional Hydroelectric Oklahoma Municipal Power Authority Kay County 28 Kortes U S Bureau of Reclamation 36 MW Conventional Hydroelectric U S Bureau of Reclamation Carbon County 29 Ellis Hydro Arkansas Electric Coop Corp 32.4 MW Conventional Hydroelectric Arkansas Electric Coop Corp Crawford County 30 Navajo Dam City of Farmington - (NM) 30 MW Conventional Hydroelectric City of Farmington - (NM) San Juan County 31 Crystal U S Bureau of Reclamation 28 MW Conventional Hydroelectric U S Bureau of Reclamation Montrose County 32 Elephant Butte U S Bureau of Reclamation 27.9 MW Conventional Hydroelectric U S Bureau of Reclamation Sierra County 33 Tesla City of Colorado Springs - (CO) 26.6 MW Conventional Hydroelectric City of Colorado Springs - (CO) El Paso County 34 North Platte Nebraska Public Power District 26.2 MW Conventional Hydroelectric Nebraska Public Power District Lincoln County 35 Green Mountain U S Bureau of Reclamation 26 MW Conventional Hydroelectric U S Bureau of Reclamation Summit County 36 Narrows (AR) USCE -Vickburg District 25.5 MW Conventional Hydroelectric USCE -Vickburg District Pike County 37 Johnson 2 Central Nebraska Pub P&I Dist 22.5 MW Conventional Hydroelectric Central Nebraska Pub P&I Dist Gosper County 38 Jeffrey Central Nebraska Pub P&I Dist 21.6 MW Conventional Hydroelectric Central Nebraska Pub P&I Dist Lincoln County 39 Johnson 1 Central Nebraska Pub P&I Dist 21.6 MW Conventional Hydroelectric Central Nebraska Pub P&I Dist Gosper County 40 Buffalo Bill U S Bureau of Reclamation 18 MW Conventional Hydroelectric U S Bureau of Reclamation Park County 41 Ozark Beach Empire District Electric Co Detailed profile 16 MW Conventional Hydroelectric Empire District Electric Co Taney County 42 Abiquiu Dam Los Alamos County - (NM) 15.6 MW Conventional Hydroelectric Los Alamos County - (NM) Rio Arriba County 43 Boysen U S Bureau of Reclamation 15 MW Conventional Hydroelectric U S Bureau of Reclamation Fremont County 44 Towaoc U S Bureau of Reclamation 11.4 MW Conventional Hydroelectric U S Bureau of Reclamation Montezuma County 45 Fontenelle U S Bureau of Reclamation 10 MW Conventional Hydroelectric U S Bureau of Reclamation Lincoln County 46 Upper Molina U S Bureau of Reclamation 9.9 MW Conventional Hydroelectric U S Bureau of Reclamation Mesa County 47 Marys Lake U S Bureau of Reclamation 8.1 MW Conventional Hydroelectric U S Bureau of Reclamation Larimer County 48 El Vado Dam Los Alamos County - (NM) 8 MW Conventional Hydroelectric Los Alamos County - (NM) Rio Arriba County 49 Tri-County Water Hydropower Project Tri-County Water Conservancy District 8 MW Conventional Hydroelectric Tri-County Water Conservancy District Ouray County 50 Monroe (NE) Loup River Public Power Dist 7.8 MW Conventional Hydroelectric Loup River Public Power Dist Platte County