Dams in Boulder County, Colorado
103Total Dams
32High Hazard
19Significant
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Gross | High | Fair | 350 | Hydroelectric | 1955 |
| Button Rock | High | Satisfactory | 214 | Water Supply | 1969 |
| Barker Meadow | High | Satisfactory | 184 | Hydroelectric | 1909 |
| Marshall Lake | High | Satisfactory | 101 | Irrigation | 1908 |
| Pine Brook | High | Satisfactory | 84 | Water Supply | 2006 |
| Superior | High | Satisfactory | 83 | Water Supply | 1994 |
| Valmont 'a' | High | Fair | 80 | Water Supply | 1962 |
| Silver Lake | High | Fair | 70 | Water Supply | 1887 |
| Left Hand Valley | High | Satisfactory | 68 | Irrigation | 1952 |
| Left Hand Park | High | Satisfactory | 65 | Irrigation | 1966 |
| Boulder - South | High | Satisfactory | 59 | Water Supply | 1955 |
| Foothills | High | Satisfactory | 56 | Irrigation | 1911 |
| Six Mile - Main | High | Satisfactory | 52 | Irrigation | 1892 |
| Boulder - North | High | Satisfactory | 51 | Water Supply | 1955 |
| Baseline - East | High | Satisfactory | 44 | Irrigation | 1905 |
| Clover Basin | High | Satisfactory | 39 | Irrigation | 1910 |
| Lagerman | High | Satisfactory | 36 | Fish and Wildlife Pond | 1878 |
| Beaver Park | High | Satisfactory | 33 | Irrigation | 1892 |
| Waneka | High | Satisfactory | 31 | Recreation | 1865 |
| Leggett & Hillcrest | High | Satisfactory | 28 | Water Supply | 1917 |
| Hayden | High | Fair | 27 | Irrigation | 1905 |
| Glacier Lake | High | Fair | 25 | Irrigation | 1905 |
| Mesa Park | High | Fair | 25 | Recreation | 1907 |
| Kossler | High | Satisfactory | 20 | Hydroelectric | 1909 |
| Baseline - Northwest | High | Satisfactory | 20 | Irrigation | 1905 |
| Longmont Wtp Forebay Embankment | High | Satisfactory | 20 | Water Supply | 2005 |
| Erie | High | Fair | 19 | Water Supply | 1935 |
| Pleasant Valley | High | Satisfactory | 19 | Irrigation | 1868 |
| Jasper | High | Satisfactory | 18 | Water Supply | 1988 |
| Mccall | High | Satisfactory | 14 | Water Supply | 1909 |
| Davis No. 1 | High | Satisfactory | 13 | Irrigation | 1910 |
| Harper Lake | High | Satisfactory | 11 | Water Supply | 1985 |
| Panama No. 1 - East | Significant | Satisfactory | 51 | Irrigation | 1904 |
| Margaret Spurgeon #1 | Significant | Satisfactory | 42 | Irrigation | 1963 |
| Highland #2 (south) | Significant | Satisfactory | 41 | Irrigation | 1881 |
| Highland #2 (north) | Significant | Satisfactory | 41 | Irrigation | 1881 |
| Albion Lake | Significant | Fair | 36 | Water Supply | 1913 |
| Oligarchy #1 | Significant | Satisfactory | 33 | Irrigation | 1889 |
| Goose Lake | Significant | Satisfactory | 32 | Water Supply | 1908 |
| Gold Lake #1 | Significant | Satisfactory | 24 | Fish and Wildlife Pond | 1879 |
| Allen Lake | Significant | Satisfactory | 24 | Irrigation | 1928 |
| Louisville No. 1 | Significant | Satisfactory | 20 | Water Supply | 1888 |
| Gold Lake #2 | Significant | Satisfactory | 19 | Fish and Wildlife Pond | 1879 |
| Mcintosh | Significant | Satisfactory | 17 | Irrigation | 1902 |
| Brainard Lake | Significant | Not Rated | 17 | Recreation | 1943 |
| Panama No. 1 - South | Significant | Satisfactory | 16 | Irrigation | 1904 |
| Prince No. 1 | Significant | Satisfactory | 14 | Irrigation | 1893 |
| Ish #3 (east Dam) | Significant | Satisfactory | 12 | Irrigation | |
| Gaynor | Significant | Satisfactory | 10 | Irrigation | |
| Los Lagos No. 3 | Significant | Satisfactory | 10 | Irrigation | 1894 |
| Gold Lake #3 | Significant | Satisfactory | 9 | Fish and Wildlife Pond | 1879 |
| Green Lake No. 2 | Low | Not Rated | 52 | Water Supply | 1938 |
| Longs Peak #2 | Low | Not Rated | 51 | Fish and Wildlife Pond | 1968 |
| Joder | Low | Satisfactory | 46 | Irrigation | 1962 |
| Loukonen Brothers | Low | Not Rated | 45 | Irrigation | 1961 |
| South Boulder Diversion Intake Dam | Low | Fair | 43 | Water Supply | 1936 |
| St. Joe Tailings | Low | Not Rated | 42 | Tailings | 1936 |
| Longs Peak #1 | Low | Satisfactory | 41 | Fish and Wildlife Pond | 1960 |
| Lake Isabelle | Low | Fair | 38 | Irrigation | 1925 |
| Western Mobile Lake 4 | Low | Not Rated | 33 | ||
| Longmont Reservoir | Low | Unsatisfactory | 30 | Water Supply | 1900 |
| Green Lake No. 3 | Low | Satisfactory | 28 | Water Supply | 1907 |
| Slinde | Low | Not Rated | 25 | Irrigation | 1950 |
| Skyscraper | Low | Fair | 24 | Water Supply | 1940 |
| Green Lake No. 1 | Low | Not Rated | 24 | Water Supply | 1940 |
| Copeland | Low | Fair | 24 | Water Supply | 1934 |
| Viele Lake | Low | Fair | 24 | Recreation | 1967 |
| Island Lake | Low | Fair | 23 | Water Supply | 1890 |
| Hodgson-harris | Low | Satisfactory | 23 | Fish and Wildlife Pond | 1906 |
| Mesa | Low | Fair | 22 | Recreation | 1907 |
| Lakewood Reservoir | Low | Not Rated | 22 | Water Supply | 1906 |
| Tumblesom | Low | Fair | 19 | Fish and Wildlife Pond | 1918 |
| Goodhue No. 1 | Low | Fair | 18 | Irrigation | 1938 |
| Silver Spruce #2 | Low | Satisfactory | 18 | Recreation | 1958 |
| Mccaslin | Low | Satisfactory | 16 | Irrigation | 1908 |
| Branith #1 | Low | Satisfactory | 16 | Irrigation | |
| Swede | Low | Satisfactory | 15 | Irrigation | 1930 |
| Sunset Lake | Low | Fair | 15 | Irrigation | |
| Wwtp | Low | Not Rated | 14 | ||
| Prince No. 1 | Low | Satisfactory | 14 | Water Supply | 1879 |
| Six Mile - Northwest | Low | Fair | 14 | Irrigation | 1892 |
| Golden Pond No. 3 | Low | Satisfactory | 13 | ||
| Left Hand | Low | Satisfactory | 13 | Irrigation | 1900 |
| Steele Brothers #2 | Low | Not Rated | 13 | Irrigation | 1900 |
| Marfell Lake No. 1 | Low | Not Rated | 12 | Irrigation | 1880 |
| Independent | Low | Satisfactory | 12 | Irrigation | 1903 |
| Hecla | Low | Fair | 12 | Irrigation | 1915 |
| Dodd | Low | Satisfactory | 12 | Irrigation | 1875 |
| Teller No. 2 | Low | Fair | 12 | Irrigation | 1904 |
| Steele Brothers #1 | Low | Satisfactory | 12 | Irrigation | 1918 |
| Peterson Lake | Low | Fair | 12 | Water Supply | 1961 |
| Panama No. 1 - Northeast | Low | Satisfactory | 12 | Irrigation | 1904 |
| Teller Lake No. 5 - East | Low | Not Rated | 12 | Irrigation | 1911 |
| Crystal | Low | Not Rated | 11 | Recreation | 1881 |
| Davis No. 2 | Low | Satisfactory | 11 | Irrigation | 1948 |
| West Lake | Low | Not Rated | 10 | Irrigation | 2020 |
| Beaver Park East | Low | Not Rated | 10 | Fish and Wildlife Pond | 1892 |
| Davis | Low | Not Rated | 9 | Irrigation | 1886 |
| Teller Lake No. 5 - West | Low | Not Rated | 9 | Irrigation | 1911 |
| Walker | Low | Satisfactory | 8 | Irrigation | 1892 |
| Divide | Low | Not Rated | 8 | Irrigation | 1879 |
| Calkins | Low | Not Rated | 8 | Irrigation | 1879 |
| Panama No. 1 - Northwest | Low | Not Rated | 7 | Irrigation | 1904 |