Dams in Monmouth County, New Jersey
44Total Dams
12High Hazard
15Significant
Dam Safety in Monmouth County, New Jersey
Monmouth County has 44 dams tracked in the National Inventory of Dams. Of these, 12 are classified as high hazard — meaning failure would probably cause loss of human life. Another 15 carry a significant hazard classification. Currently, 18 dams have a condition assessment of poor or unsatisfactory.
The average dam in Monmouth County is 85 years old. The most common purpose is recreation. The tallest dam is Glendola Reservoir Dam at 65 ft.
Explore more: Oldest dams in New Jersey · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Glendola Reservoir Dam | High | Satisfactory | 65 | Water Supply | 1961 |
| Manasquan Reservoir Dam | High | Satisfactory | 53 | Water Supply | 1990 |
| Swimming River Reservoir Dam | High | Satisfactory | 45 | Water Supply | 1901 |
| Assunpink #18 Dam | High | Poor | 38 | Flood Risk Reduction | |
| Assunpink #4 Dam | High | Poor | 24 | Flood Risk Reduction | |
| Millhurst Lake Dam | High | Satisfactory | 23 | Recreation | 1915 |
| Matawan Lake Dam | High | Poor | 20 | Recreation | 1923 |
| Lake Topanemus Dam | High | Fair | 20 | Recreation | 1915 |
| Allentown Dam | High | Satisfactory | 18 | Recreation | |
| Lake Lefferts Dam | High | Poor | 16 | Recreation | 1928 |
| Lake Louise Dam | High | Satisfactory | 14 | Recreation | |
| Echo Lake Dam | High | Satisfactory | 8 | ||
| Assunpink #19 Dam | Significant | Fair | 36 | Recreation | |
| Imlaystown Lake Dam | Significant | Poor | 20 | Fire Protection, Stock, Or Small Fish Pond | 1925 |
| Perrineville Dam | Significant | Poor | 17 | Recreation | |
| Indian Dam | Significant | Poor | 17 | Water Supply | 1937 |
| Shadow Lake Dam | Significant | Poor | 16 | Recreation | 1931 |
| Red Valley Dam | Significant | Poor | 15 | Recreation | 1927 |
| Old Mill Pond Dam | Significant | Satisfactory | 15 | Recreation | 1948 |
| Brisbane Lake Dam | Significant | Poor | 14 | Recreation | |
| Manalapan Brook Pond Dam | Significant | Poor | 14 | Recreation | 1924 |
| Bucks Mill Dam | Significant | Poor | 13 | Recreation | 1950 |
| Englishtown Lake Dam | Significant | Poor | 13 | Recreation | 1959 |
| Osborns Mills Dam | Significant | Poor | 12 | Recreation | |
| Hurley Pond Dam | Significant | Poor | 6 | Recreation | 1915 |
| Upper Pond Dam | Significant | Fair | 0 | Recreation | |
| Navesink River Road Dam | Significant | Poor | 0 | Recreation | |
| Marlu Lake Dam | Low | Fair | 29 | Irrigation | 1965 |
| Cream Ridge Dam | Low | 24 | Irrigation | 1971 | |
| Wreck Pond Dam | Low | 20 | Recreation | ||
| Dawns Dam | Low | Satisfactory | 20 | Irrigation | 1950 |
| New Jersey No Name # 57 Dam | Low | Poor | 17 | Recreation | |
| Wickapecko Dam | Low | 13 | Recreation | 1915 | |
| Tinton Manor Dam | Low | 13 | Recreation | ||
| Assunpink #5 Dam | Low | Satisfactory | 13 | Flood Risk Reduction | |
| New Jersey No Name # 110 Dam | Low | 12 | Irrigation | ||
| Deal Lake Dam | Low | 11 | Recreation | ||
| Jumping Brook Dam | Low | Satisfactory | 10 | Water Supply | 1907 |
| Stabilization/leveling Pond Dam | Low | Satisfactory | 10 | Water Supply | 1975 |
| New Jersey No Name # 82 Dam | Low | 10 | Irrigation | ||
| Franklin Lake Dam | Low | Poor | 10 | Recreation | |
| Wetland Area I-2 Dam | Low | Satisfactory | 9 | Other | 1990 |
| Poricy Dam | Low | 8 | Recreation | ||
| New Jersey No Name # 109 Dam | Low | Satisfactory | 8 | Recreation | 1950 |