66Total Dams
34High Hazard
12Significant
Dam Safety in Williamson County, Texas
Williamson County has 66 dams tracked in the National Inventory of Dams. Of these, 34 are classified as high hazard — meaning failure would probably cause loss of human life. Another 12 carry a significant hazard classification. Currently, 2 dams have a condition assessment of poor or unsatisfactory.
The average dam in Williamson County is 60 years old. The most common purpose is flood risk reduction. The tallest dam is North San Gabriel Dam at 162 ft.
Explore more: Oldest dams in Texas · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| North San Gabriel Dam | High | Not assessed | 162 | Flood Risk Reduction | 1980 |
| Granger Dam | High | Not assessed | 115 | Water Supply | 1979 |
| Upper Brushy Creek Ws Scs Site 4 Dam | High | Satisfactory | 57 | Flood Risk Reduction | 1960 |
| Upper Brushy Creek Ws Scs Site 3 Dam | High | Satisfactory | 55 | Flood Risk Reduction | 1962 |
| Upper Brushy Creek Ws Scs Site 7 Dam | High | Satisfactory | 54 | Flood Risk Reduction | 1965 |
| Upper Brushy Creek Ws Scs Site 21 Dam | High | Satisfactory | 49 | Flood Risk Reduction | 1959 |
| Upper Brushy Creek Ws Scs Site 6 Dam | High | Satisfactory | 49 | Flood Risk Reduction | 1959 |
| Upper Brushy Creek Ws Scs Site 16 Dam | High | Satisfactory | 48 | Flood Risk Reduction | 1963 |
| Lower Brushy Creek Ws Scs Site 18 Dam | High | Fair | 43 | Flood Risk Reduction | 1963 |
| Upper Brushy Creek Ws Scs Site 10a Dam | High | Not assessed | 42 | Flood Risk Reduction | 1965 |
| Upper Brushy Creek Ws Scs Site 8 Dam | High | Satisfactory | 42 | Flood Risk Reduction | 1959 |
| Upper Brushy Creek Ws Scs Site 19 Dam | High | Satisfactory | 41 | Flood Risk Reduction | 1960 |
| Upper Brushy Creek Ws Scs Site 11 Dam | High | Satisfactory | 41 | Flood Risk Reduction | 1967 |
| La Frontera Detention Dam | High | Fair | 39 | Recreation | 1958 |
| Upper Brushy Creek Ws Scs Site 5 Dam | High | Satisfactory | 39 | Flood Risk Reduction | 1960 |
| Upper Brushy Creek Ws Scs Site 2 Dam | High | Satisfactory | 39 | Flood Risk Reduction | 1962 |
| Upper Brushy Creek Ws Scs Site 29 Dam | High | Fair | 37 | Flood Risk Reduction | 1972 |
| Upper Brushy Creek Ws Scs Site 20 Dam | High | Satisfactory | 36 | Flood Risk Reduction | 1960 |
| Upper Brushy Creek Ws Scs Site 9 Dam | High | Not assessed | 36 | Flood Risk Reduction | 1959 |
| Upper Brushy Creek Ws Scs Site 18 Dam | High | Satisfactory | 36 | Flood Risk Reduction | 1960 |
| Upper Brushy Creek Ws Scs Site 25 Dam | High | Fair | 35 | Flood Risk Reduction | 1975 |
| Upper Brushy Creek Ws Scs Site 1 Dam | High | Satisfactory | 35 | Flood Risk Reduction | 1961 |
| Upper Brushy Creek Ws Scs Site 17 Dam | High | Satisfactory | 34 | Flood Risk Reduction | 1966 |
| Db Wood Rd Dam | High | Not assessed | 32 | ||
| Upper Brushy Creek Ws Scs Site 13a Dam | High | Satisfactory | 32 | Flood Risk Reduction | 1960 |
| Upper Brushy Creek Ws Scs Site 12 Dam | High | Satisfactory | 32 | Flood Risk Reduction | 1967 |
| Upper Brushy Creek Ws Scs Site 15 Dam | High | Satisfactory | 30 | Flood Risk Reduction | 1965 |
| Upper Brushy Creek Ws Scs Site 22 Dam | High | Not assessed | 28 | Flood Risk Reduction | 1959 |
| Upper Brushy Creek Ws Scs Site 30 Dam | High | Fair | 27 | Flood Risk Reduction | 1959 |
| Twin Lakes Dam | High | Fair | 26 | Recreation | 1972 |
| Lower Brushy Creek Ws Scs Site 20 Dam | High | Satisfactory | 26 | Flood Risk Reduction | 1966 |
| Gabriels Overlook Dam | High | Not assessed | 25 | 1964 | |
| Upper Brushy Creek Ws Scs Site 14 Dam | High | Satisfactory | 25 | Flood Risk Reduction | 1966 |
| Upper Brushy Creek Ws Scs Site 32 Dam | High | Satisfactory | 23 | Flood Risk Reduction | 1960 |
| Lower Brushy Creek Ws Scs Site 10 Dam | Significant | Fair | 43 | Flood Risk Reduction | 1963 |
| Lower Brushy Creek Ws Scs Site 3 Dam | Significant | Fair | 40 | Flood Risk Reduction | 1960 |
| Lower Brushy Creek Ws Scs Site 9 Dam | Significant | Fair | 40 | Flood Risk Reduction | 1966 |
| Lower Brushy Creek Ws Scs Site 6 Dam | Significant | Fair | 36 | Flood Risk Reduction | 1964 |
| Lower Brushy Creek Ws Scs Site 4a Dam | Significant | Fair | 35 | Flood Risk Reduction | 1961 |
| Lower Brushy Creek Ws Scs Site 7 Dam | Significant | Fair | 34 | Flood Risk Reduction | 1960 |
| Lower Brushy Creek Ws Scs Site 17 Dam | Significant | Fair | 27 | Flood Risk Reduction | 1963 |
| Lower Brushy Creek Ws Scs Site 2 Dam | Significant | Fair | 26 | Flood Risk Reduction | 1960 |
| Wolf Lakes Village Section 1 Phase 1 and Section 2 Pond Dam | Significant | Not assessed | 23 | 2022 | |
| Malish Lake Dam | Significant | Not assessed | 21 | Recreation | 1968 |
| City Lake No 1 Dam | Significant | Unsatisfactory | 20 | Recreation | 1955 |
| Zimmerhanzel Lake Dam | Significant | Not assessed | 19 | Recreation | 1968 |
| Lower Brushy Creek Ws Scs Site 8 Dam | Low | Fair | 50 | Flood Risk Reduction | 1960 |
| Upper Brushy Creek Ws Scs Site 31 Dam | Low | Fair | 44 | Flood Risk Reduction | 1977 |
| Clement Dam No 4 | Low | Not assessed | 34 | Recreation | 1980 |
| Upper Brushy Creek Ws Scs Site 33 Dam | Low | Fair | 31 | Flood Risk Reduction | 1959 |
| Lower Brushy Creek Ws Scs Site 23 Dam | Low | Fair | 30 | Flood Risk Reduction | 1961 |
| Brenni Lake Dam | Low | Not assessed | 29 | Recreation | 1974 |
| Lower Brushy Creek Ws Scs Site 22 Dam | Low | Fair | 26 | Flood Risk Reduction | 1961 |
| Wittliff Bland Gss | Low | Not assessed | 24 | 1967 | |
| Seggern Gss | Low | Not assessed | 23 | 1981 | |
| Winterrowd Lake Dam | Low | Not assessed | 23 | Recreation | 1956 |
| Pearson Lake Dam | Low | Not assessed | 23 | Recreation | 1980 |
| Tx No Name No 48 Dam | Low | Not assessed | 23 | Recreation | 1949 |
| Lower Brushy Creek Ws Scs Site 13 Dam | Low | Fair | 23 | Flood Risk Reduction | 1960 |
| Capitol Aggregates Georgetown Crushing Dam | Low | Not assessed | 22 | Water Supply | 1982 |
| Lower Brushy Creek Ws Scs Site 12 Dam | Low | Poor | 22 | Flood Risk Reduction | 1966 |
| Lower Brushy Creek Ws Scs Site 21 Dam | Low | Fair | 19 | Flood Risk Reduction | 1960 |
| Hejl Lake Dam | Low | Not assessed | 15 | Recreation | 1976 |
| City Lake Dam | Low | Not assessed | 15 | Recreation | 1963 |
| Star Golf Partners Pond 1 | Low | Not assessed | 14 | ||
| Walsh Lake Dam | Low | Not assessed | 11 | Recreation | 1930 |