Dams in Montgomery County, Pennsylvania
28Total Dams
13High Hazard
10Significant
Dam Safety in Montgomery County, Pennsylvania
Montgomery County has 28 dams tracked in the National Inventory of Dams. Of these, 13 are classified as high hazard — meaning failure would probably cause loss of human life. Another 10 carry a significant hazard classification. Currently, 2 dams have a condition assessment of poor or unsatisfactory.
The average dam in Montgomery County is 60 years old. The most common purpose is flood risk reduction. The tallest dam is Green Lane Reservoir at 87 ft.
Explore more: Oldest dams in Pennsylvania · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Green Lane Reservoir | High | Satisfactory | 87 | Water Supply | 1957 |
| Saw Mill | High | Fair | 47 | Flood Risk Reduction | 1968 |
| Martins | High | Fair | 23 | Recreation | 1886 |
| Knight | High | Fair | 22 | Recreation | 1960 |
| Pine Run Flood Retarding | High | Satisfactory | 21 | Flood Risk Reduction | 2014 |
| Deep Creek | High | Fair | 19 | Recreation | 1939 |
| Loch Alsh Reservoir | High | Satisfactory | 16 | Recreation | 1915 |
| Andorra Springs Basin B | High | Fair | 16 | Flood Risk Reduction | |
| Rapp Run Flood Retarding | High | Satisfactory | 16 | Flood Risk Reduction | 2014 |
| Remington Road Detention | High | Fair | 16 | Flood Risk Reduction | 1979 |
| Susquehanna Woods Lower | High | Fair | 14 | Flood Risk Reduction | 2005 |
| Golf Ridge Lower | High | Fair | 12 | Recreation | 1996 |
| Mill Creek Detention Basin | High | Fair | 11 | Flood Risk Reduction | 1986 |
| Graterford Sewage Lagoons | Significant | Fair | 35 | Other | 1986 |
| Estates Of Audubon | Significant | Poor | 20 | Recreation | 1992 |
| Horsham Towne Upper Pond | Significant | Fair | 17 | Flood Risk Reduction | |
| Horsham Towne Lower Pond | Significant | Fair | 16 | Flood Risk Reduction | 1988 |
| Renaissance Regional Basin | Significant | Satisfactory | 15 | Flood Risk Reduction | |
| Sunny Brook Estates # 1 | Significant | Fair | 14 | Flood Risk Reduction | 1999 |
| Penallen | Significant | Fair | 12 | Flood Risk Reduction | 1982 |
| Rinehart | Significant | Satisfactory | 12 | Recreation | 1988 |
| Timber Creek Condo | Significant | Fair | 10 | Flood Risk Reduction | 1985 |
| Knox Road Detention | Significant | Fair | 10 | Flood Risk Reduction | 1979 |
| Sterling Drug | Low | Poor | 19 | Flood Risk Reduction | |
| Camp Delmont | Low | Fair | 19 | Recreation | 1947 |
| Metroplex | Low | Fair | 15 | Flood Risk Reduction | 1999 |
| Norristown (swede Street) | Low | Satisfactory | 12 | Recreation | 1800 |
| Black Rock | Low | Satisfactory | 11 | Water Supply | 1900 |