18Total Dams
9High Hazard
4Significant
Dam Safety in Pima County, Arizona
Pima County has 18 dams tracked in the National Inventory of Dams. Of these, 9 are classified as high hazard — meaning failure would probably cause loss of human life. Another 4 carry a significant hazard classification. Currently, 1 dam has a condition assessment of poor or unsatisfactory.
The average dam in Pima County is 60 years old. The most common purpose is other. The tallest dam is Sierrita at 350 ft.
Explore more: Oldest dams in Arizona · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Sierrita | High | Not assessed | 350 | Tailings | |
| Number 7 | High | Not assessed | 189 | Tailings | |
| Clearwell Reservoir | High | Satisfactory | 77 | Water Supply | 1992 |
| Murphy Reservoir | High | Satisfactory | 60 | Water Supply | 1987 |
| Number 4 | High | Not assessed | 40 | Tailings | |
| Leach Flood #1 | High | Satisfactory | 36 | Flood Risk Reduction | 1965 |
| Menager's | High | Unsatisfactory | 30 | Flood Risk Reduction | 1927 |
| Kennedy Park | High | Fair | 18 | Recreation | 1973 |
| Park Avenue Detention Basin Complex | High | Satisfactory | 18 | Flood Risk Reduction | 2008 |
| Arivaca | Significant | Fair | 48 | Fish and Wildlife Pond | 1970 |
| Sycamore Dam | Significant | Not assessed | 47 | 1939 | |
| Soldier Lake Dam | Significant | Not assessed | 23 | 1922 | |
| Lower Sabino Dam | Significant | Not assessed | 18 | 1935 | |
| Lower Rose Canyon | Low | Not assessed | 45 | Fish and Wildlife Pond | 1958 |
| The Lake | Low | Not assessed | 31 | Other | |
| Twin Tanks | Low | Not assessed | 24 | Other | |
| Avra Valley Wwtp | Low | Not assessed | 14 | Other | 1994 |
| Green Valley Wwtp | Low | Not assessed | 12 | Other | 1981 |