Dams in Larimer County, Colorado
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 Available | 158 | Irrigation | 1949 |
| Loveland Water Storage | High | Satisfactory | 152 | Water Supply | 1977 |
| Joe Wright | High | Satisfactory | 148 | Water Supply | 1979 |
| Rattlesnake Dam | High | Not Available | 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 Available | 86 | Hydroelectric | 1953 |
| Peterson Lake | High | Satisfactory | 78 | Water Supply | 1973 |
| East Portal Dam | High | Not Available | 76 | 1947 | |
| Carter Lake Dam 2 | High | Not Available | 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 Available | 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 Available | 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 Rated | 19 | Irrigation | 1903 |
| College #3 | High | Satisfactory | 18 | Irrigation | 1919 |
| Lily Lake Dam | High | Not Available | 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 Rated | 54 | Irrigation | 1969 |
| Lone Pine | Low | Not Rated | 48 | Recreation | 1979 |
| Fox Acres #3 | Low | Not Rated | 45 | Irrigation | 1983 |
| Little Hell Creek Diversion Dam | Low | Not Available | 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 Rated | 36 | Recreation | 1972 |
| Mountain Supply # 1 | Low | Fair | 35 | Flood Risk Reduction | 1904 |
| Fox Acres | Low | Not Rated | 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 Rated | 25 | Irrigation | 1974 |
| South Gray | Low | Satisfactory | 24 | Irrigation | 1976 |
| Mountain Supply # 9 | Low | Fair | 24 | Irrigation | 1907 |
| Wasson | Low | Not Rated | 23 | Irrigation | 1965 |
| North Gray | Low | Not Rated | 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 Rated | 20 | Irrigation | 1951 |
| Box Elder #3 | Low | Unsatisfactory | 20 | Irrigation | 1890 |
| Box I #1 | Low | Not Rated | 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 Rated | 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 Rated | 15 | Recreation | 1904 |
| Mountain Supply # 7 | Low | Satisfactory | 14 | Irrigation | 1908 |
| Box Elder #2 | Low | Satisfactory | 13 | Irrigation | 1885 |
| Rist Canyon | Low | Not Rated | 12 | Irrigation | 1882 |
| Lindenmeirs | Low | Fair | 12 | Irrigation | 1902 |
| Geist | Low | Satisfactory | 12 | Irrigation | 1925 |
| Mitchell #3 | Low | Not Rated | 11 | Fish and Wildlife Pond | 1890 |
| Westerdoll Lake | Low | Fair | 11 | Irrigation | 1900 |
| Caverly | Low | Not Rated | 10 | Irrigation | 1923 |
| Dyekman | Low | Fair | 10 | Irrigation | 1902 |
| Zimmerman Lake | Low | Not Rated | 10 | Fish and Wildlife Pond | 1913 |
| Deer Lake | Low | Not Rated | 10 | Recreation | 1919 |
| Upper Stonewall | Low | Not Rated | 10 | Irrigation | 1910 |
| Box Elder #5 | Low | Not Rated | 10 | Irrigation | 1888 |
| Erie Lake | Low | Not Rated | 10 | Fish and Wildlife Pond | 1900 |
| Bellaire | Low | Not Rated | 9 | Fish and Wildlife Pond | 1904 |
| Box Elder #1 | Low | Not Rated | 9 | Irrigation | 1965 |
| Dixon | Low | Not Rated | 9 | Irrigation | 1923 |
| North Poudre #11 | Low | Fair | 8 | Irrigation | 1888 |
| Ramona | Low | Not Rated | 8 | Recreation | 1889 |
| Johnson | Low | Not Rated | 8 | Irrigation | 1944 |
| Mountain Supply # 6 | Low | Not Rated | 8 | Irrigation | 1910 |
| Cattail Pond | Low | Fair | 7 | Irrigation | 1900 |
| Houts | Low | Not Rated | 7 | Irrigation | 1902 |
| Snake Lake | Low | Not Rated | 7 | Recreation | 1906 |