40Total Dams
3High Hazard
14Significant
Dam Safety in Washington County, Oregon
Washington County has 40 dams tracked in the National Inventory of Dams. Of these, 3 are classified as high hazard — meaning failure would probably cause loss of human life. Another 14 carry a significant hazard classification.
The average dam in Washington County is 55 years old. The most common purpose is irrigation. The tallest dam is Barney at 165 ft.
Explore more: Oldest dams in Oregon · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Barney | High | Satisfactory | 165 | Water Supply | 1998 |
| Scoggins Dam | High | Not assessed | 151 | Irrigation | 1975 |
| Kay Lake | High | Satisfactory | 38 | Irrigation | 1963 |
| Unger-bill Dam | Significant | Not assessed | 40 | Irrigation | 1968 |
| Jesse Enlargement | Significant | Not assessed | 32 | Irrigation | 1998 |
| Walters, Glenn #5 | Significant | Not assessed | 29 | Irrigation | 1984 |
| Cook Reservoir (wash) | Significant | Not assessed | 28 | Irrigation | 1972 |
| Walters, Glenn #1 - Large | Significant | Not assessed | 28 | Irrigation | 1969 |
| Dober Reservoir | Significant | Not assessed | 24 | Irrigation | 1954 |
| Tualatin Park | Significant | Not assessed | 23 | Irrigation | 1970 |
| Hoefer-pierson Reservoir | Significant | Not assessed | 23 | Irrigation | 1970 |
| Dierickx | Significant | Not assessed | 21 | Irrigation | 1980 |
| Lind Reservoir | Significant | Not assessed | 21 | Irrigation | 1970 |
| Maple Headquarters Reservoir | Significant | Not assessed | 19 | Irrigation | 1986 |
| Ettinger Pond | Significant | Not assessed | 18 | Irrigation | 1954 |
| Paul Chobin Dam | Significant | Not assessed | 16 | ||
| Burkhalter #2 | Significant | Not assessed | 15 | Irrigation | 1952 |
| Pearson Reservoir | Low | Not assessed | 64 | Irrigation | 1971 |
| Hochstein Dam #3 | Low | Not assessed | 45 | Hydroelectric | |
| Bump Farm Reservoir | Low | Not assessed | 39 | Irrigation | 1956 |
| Schmidt, Howard Reservoir | Low | Not assessed | 38 | Recreation | 1969 |
| Graham | Low | Not assessed | 34 | Irrigation | 1961 |
| Hatfield (spaulding) | Low | Not assessed | 33 | Irrigation | 1955 |
| Pierson-upper | Low | Not assessed | 31 | Irrigation | 1965 |
| Midway Nursery | Low | Not assessed | 31 | Irrigation | 1992 |
| Hartwick Reservoir | Low | Not assessed | 30 | Irrigation | 1956 |
| John F Wood | Low | Not assessed | 28 | Recreation | 1971 |
| Gustav Krause | Low | Not assessed | 23 | Irrigation | |
| Vanderzanden Reservoir | Low | Not assessed | 21 | Irrigation | 1967 |
| Lewis, Alfred Dam | Low | Not assessed | 20 | Irrigation | 1967 |
| Gildersleeve | Low | Not assessed | 18 | Irrigation | |
| Schmadeke | Low | Not assessed | 18 | Irrigation | 1971 |
| Bauer Reservoir | Low | Not assessed | 17 | Recreation | 1965 |
| Twigg Reservoir | Low | Not assessed | 16 | Irrigation | 1957 |
| Tualatin Refuge | Low | Not assessed | 14 | ||
| Roy Farm | Low | Not assessed | 14 | Other | 1989 |
| Vandehey Reservoir | Low | Not assessed | 12 | Irrigation | 1954 |
| Bailey Reservoir (aka Kalsch) | Low | Not assessed | 12 | Irrigation | 1968 |
| Hillsboro West (lagoon) | Low | Not assessed | 12 | Irrigation | 1984 |
| Ritchey Farm Reservoir | Low | Not assessed | 12 | Irrigation | 1985 |