148Total Dams
57High Hazard
30Significant
Dam Safety in Larimer County, Colorado
Larimer County has 148 dams tracked in the National Inventory of Dams. Of these, 57 are classified as high hazard — meaning failure would probably cause loss of human life. Another 30 carry a significant hazard classification. Currently, 4 dams have a condition assessment of poor or unsatisfactory.
The average dam in Larimer County is 90 years old. The most common purpose is irrigation. The tallest dam is Horsetooth Dam at 158 ft.
Explore more: Oldest dams in Colorado · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Horsetooth Dam | High | Not assessed | 158 | Irrigation | 1949 |
| Loveland Water Storage | High | Satisfactory | 152 | Water Supply | 1977 |
| Joe Wright | High | Satisfactory | 148 | Water Supply | 1979 |
| Rattlesnake Dam | High | Not assessed | 130 | Irrigation | 1952 |
| Milton Seaman | High | Satisfactory | 120 | Water Supply | 1948 |
| Rawhide | High | Satisfactory | 113 | Water Supply | 1980 |
| Park Creek | High | Satisfactory | 108 | Irrigation | 1970 |
| Halligan | High | Fair | 95 | Irrigation | 1970 |
| Long Draw | High | Satisfactory | 88 | Irrigation | 1975 |
| Flatiron Dam | High | Not assessed | 86 | Hydroelectric | 1953 |
| Peterson Lake | High | Satisfactory | 78 | Water Supply | 1973 |
| East Portal Dam | High | Not assessed | 76 | 1947 | |
| Carter Lake Dam 2 | High | Not assessed | 75 | Hydroelectric | 1952 |
| Crow Lane No. 1 | High | Satisfactory | 74 | Water Supply | 2008 |
| Panhandle | High | Satisfactory | 71 | Irrigation | 1971 |
| Lon Hagler | High | Satisfactory | 71 | Irrigation | 1967 |
| Olympus Dam | High | Not assessed | 70 | Hydroelectric | 1949 |
| Floodwater Ret. B-2 | High | Satisfactory | 66 | Flood Risk Reduction | 1982 |
| Fossil Creek | High | Satisfactory | 63 | Irrigation | 1903 |
| Dry Creek | High | Satisfactory | 62 | Water Supply | 2007 |
| Cache La Poudre | High | Satisfactory | 60 | Irrigation | 1977 |
| Cobb Lake | High | Satisfactory | 58 | Irrigation | 1953 |
| Chambers Lake | High | Satisfactory | 58 | Irrigation | 1924 |
| Windsor #8 | High | Satisfactory | 56 | Irrigation | 1903 |
| Floodwater Ret. B-3 | High | Satisfactory | 55 | Flood Risk Reduction | 1979 |
| North Poudre #15 | High | Satisfactory | 53 | Irrigation | 1949 |
| Barnes Meadow | High | Satisfactory | 50 | Irrigation | 1923 |
| Water Supply No 3 | High | Satisfactory | 48 | Irrigation | 1944 |
| Ish #3 (main Dam) | High | Satisfactory | 48 | Irrigation | 1905 |
| Douglas | High | Satisfactory | 47 | Irrigation | 1901 |
| Lake Loveland | High | Satisfactory | 47 | Irrigation | 1894 |
| Comanche | High | Satisfactory | 46 | Irrigation | 1966 |
| Hourglass | High | Satisfactory | 46 | Irrigation | 1898 |
| Indian Creek | High | Satisfactory | 46 | Irrigation | 1948 |
| North Poudre # 6 | High | Satisfactory | 42 | Irrigation | 1905 |
| North Poudre # 5 | High | Satisfactory | 41 | Irrigation | 1905 |
| Boyd Lake | High | Satisfactory | 40 | Fish and Wildlife Pond | 1900 |
| Terry Lake | High | Satisfactory | 40 | Irrigation | 1890 |
| North Poudre # 3 | High | Satisfactory | 39 | Irrigation | 1980 |
| Rocky Ridge | High | Satisfactory | 35 | Irrigation | 1940 |
| Long Pond | High | Satisfactory | 34 | Irrigation | 1922 |
| Handy | High | Fair | 34 | Irrigation | 1915 |
| Water Supply No 4 | High | Satisfactory | 33 | Irrigation | 1880 |
| Floodwater Ret. B-4 | High | Satisfactory | 33 | Flood Risk Reduction | 1978 |
| North Poudre # 2 | High | Satisfactory | 33 | Irrigation | 1955 |
| Mariano | High | Satisfactory | 30 | Irrigation | 1889 |
| Marys Lake Dike 1 | High | Not assessed | 29 | Hydroelectric | 1949 |
| East Side Detention Facility | High | Satisfactory | 26 | Flood Risk Reduction | 2016 |
| Elder | High | Satisfactory | 25 | Irrigation | 1904 |
| Kluver | High | Satisfactory | 25 | Irrigation | 1925 |
| Warren Lake | High | Satisfactory | 23 | Irrigation | 1882 |
| Richards | High | Satisfactory | 21 | Irrigation | 1904 |
| Equalizer | High | Fair | 20 | Irrigation | 1902 |
| Flood Control Basin No. 1 | High | Satisfactory | 20 | Flood Risk Reduction | 2006 |
| Rist - Benson | High | Not assessed | 19 | Irrigation | 1903 |
| College #3 | High | Satisfactory | 18 | Irrigation | 1919 |
| Lily Lake Dam | High | Not assessed | 15 | Fish and Wildlife Pond | 1913 |
| Floodwater Ret. B-6 | Significant | Satisfactory | 110 | Flood Risk Reduction | 1977 |
| Floodwater Ret. B-5 | Significant | Satisfactory | 91 | Flood Risk Reduction | 1977 |
| Worster | Significant | Satisfactory | 78 | Irrigation | 1911 |
| Parvin | Significant | Satisfactory | 68 | Fish and Wildlife Pond | 1925 |
| Twin Lakes Reservoir | Significant | Satisfactory | 41 | Water Supply | 1998 |
| Horseshoe Lake (east Dam) | Significant | Satisfactory | 37 | Irrigation | 1905 |
| Ryan Gulch | Significant | Satisfactory | 36 | Irrigation | 1950 |
| Dowdy Lake | Significant | Satisfactory | 35 | Recreation | 1962 |
| Clarks Lake | Significant | Satisfactory | 33 | Irrigation | 1904 |
| Hertha | Significant | Satisfactory | 32 | Irrigation | 1958 |
| South Side | Significant | Satisfactory | 31 | Irrigation | 1921 |
| Loveland Lake | Significant | Satisfactory | 30 | Irrigation | 1905 |
| Fairway | Significant | Satisfactory | 29 | Recreation | 1964 |
| Lone Tree | Significant | Satisfactory | 29 | Irrigation | 1882 |
| Horseshoe Lake (south Dam) | Significant | Satisfactory | 27 | Irrigation | 1905 |
| Annex #8 | Significant | Satisfactory | 26 | Irrigation | 1903 |
| Donath Lake | Significant | Satisfactory | 26 | Irrigation | 1883 |
| North Poudre # 4 | Significant | Satisfactory | 24 | Irrigation | 1956 |
| Claymore | Significant | Satisfactory | 21 | Irrigation | 1978 |
| Curtis Lake | Significant | Satisfactory | 20 | Water Supply | 1906 |
| Berthoud | Significant | Satisfactory | 18 | Water Supply | 1962 |
| George Rist | Significant | Satisfactory | 17 | Irrigation | 1973 |
| Aspen Lodge | Significant | Satisfactory | 16 | Recreation | |
| Sunny Slope | Significant | Fair | 16 | Irrigation | |
| North Poudre #1 | Significant | Satisfactory | 16 | Irrigation | 1885 |
| Dixon Canyon | Significant | Satisfactory | 14 | Irrigation | 1885 |
| Sherwood | Significant | Satisfactory | 14 | Irrigation | 1906 |
| Hiawatha | Significant | Satisfactory | 14 | Fish and Wildlife Pond | 1888 |
| Carriage Hills #1 (upper) | Significant | Satisfactory | 14 | Recreation | 1967 |
| Fairport | Significant | Satisfactory | 13 | Irrigation | 1882 |
| Mattingly | Low | Not assessed | 54 | Irrigation | 1969 |
| Lone Pine | Low | Not assessed | 48 | Recreation | 1979 |
| Fox Acres #3 | Low | Not assessed | 45 | Irrigation | 1983 |
| Little Hell Creek Diversion Dam | Low | Not assessed | 43 | Hydroelectric | 1952 |
| Cedar Springs | Low | Satisfactory | 37 | Fish and Wildlife Pond | 1969 |
| Meadow Lake | Low | Fair | 37 | Recreation | 1957 |
| Fox Acres #2 | Low | Not assessed | 36 | Recreation | 1972 |
| Mountain Supply # 1 | Low | Fair | 35 | Flood Risk Reduction | 1904 |
| Fox Acres | Low | Not assessed | 35 | Irrigation | 1971 |
| Pavel #4 | Low | Fair | 32 | Water Supply | 1969 |
| Barrett | Low | Fair | 32 | Irrigation | 1973 |
| Watson Lake | Low | Satisfactory | 29 | Fish and Wildlife Pond | 1964 |
| Slab Canyon | Low | Satisfactory | 26 | Flood Risk Reduction | 1937 |
| Hinkley | Low | Satisfactory | 26 | Irrigation | 1906 |
| Riddle | Low | Unsatisfactory | 25 | 1953 | |
| Mountain Supply # 2 | Low | Satisfactory | 25 | Irrigation | 1904 |
| Willow Lake | Low | Satisfactory | 25 | Recreation | 1957 |
| Mountain Supply #10 | Low | Not assessed | 25 | Irrigation | 1974 |
| South Gray | Low | Satisfactory | 24 | Irrigation | 1976 |
| Mountain Supply # 9 | Low | Fair | 24 | Irrigation | 1907 |
| Wasson | Low | Not assessed | 23 | Irrigation | 1965 |
| North Gray | Low | Not assessed | 22 | Irrigation | 1904 |
| Martin Seepage #2 | Low | Unsatisfactory | 22 | Irrigation | 1968 |
| Cattail #1 | Low | Fair | 22 | Flood Risk Reduction | 1966 |
| Apache Lake Reservoir | Low | Satisfactory | 20 | Irrigation | 1980 |
| Groth Pumping System | Low | Not assessed | 20 | Irrigation | 1951 |
| Box Elder #3 | Low | Unsatisfactory | 20 | Irrigation | 1890 |
| Box I #1 | Low | Not assessed | 19 | Irrigation | 1967 |
| Culver | Low | Unsatisfactory | 19 | Irrigation | 1881 |
| Little Hohnholtz | Low | Fair | 18 | Recreation | 1969 |
| Nakomis Lake | Low | Satisfactory | 18 | Fish and Wildlife Pond | 1920 |
| Dry Creek | Low | Satisfactory | 17 | Irrigation | 1966 |
| Bellvue Water Treatment Pond #2 | Low | Fair | 16 | ||
| Rainbow Lake | Low | Not assessed | 16 | Water Supply | 2016 |
| Lost Lake | Low | Satisfactory | 15 | Fish and Wildlife Pond | 1929 |
| Bellvue Water Treatment Pond #1 | Low | Fair | 15 | ||
| Twin Lakes | Low | Not assessed | 15 | Recreation | 1904 |
| Mountain Supply # 7 | Low | Satisfactory | 14 | Irrigation | 1908 |
| Box Elder #2 | Low | Satisfactory | 13 | Irrigation | 1885 |
| Rist Canyon | Low | Not assessed | 12 | Irrigation | 1882 |
| Lindenmeirs | Low | Fair | 12 | Irrigation | 1902 |
| Geist | Low | Satisfactory | 12 | Irrigation | 1925 |
| Mitchell #3 | Low | Not assessed | 11 | Fish and Wildlife Pond | 1890 |
| Westerdoll Lake | Low | Fair | 11 | Irrigation | 1900 |
| Caverly | Low | Not assessed | 10 | Irrigation | 1923 |
| Dyekman | Low | Fair | 10 | Irrigation | 1902 |
| Zimmerman Lake | Low | Not assessed | 10 | Fish and Wildlife Pond | 1913 |
| Deer Lake | Low | Not assessed | 10 | Recreation | 1919 |
| Upper Stonewall | Low | Not assessed | 10 | Irrigation | 1910 |
| Box Elder #5 | Low | Not assessed | 10 | Irrigation | 1888 |
| Erie Lake | Low | Not assessed | 10 | Fish and Wildlife Pond | 1900 |
| Bellaire | Low | Not assessed | 9 | Fish and Wildlife Pond | 1904 |
| Box Elder #1 | Low | Not assessed | 9 | Irrigation | 1965 |
| Dixon | Low | Not assessed | 9 | Irrigation | 1923 |
| North Poudre #11 | Low | Fair | 8 | Irrigation | 1888 |
| Ramona | Low | Not assessed | 8 | Recreation | 1889 |
| Johnson | Low | Not assessed | 8 | Irrigation | 1944 |
| Mountain Supply # 6 | Low | Not assessed | 8 | Irrigation | 1910 |
| Cattail Pond | Low | Fair | 7 | Irrigation | 1900 |
| Houts | Low | Not assessed | 7 | Irrigation | 1902 |
| Snake Lake | Low | Not assessed | 7 | Recreation | 1906 |