Malvern Preparatory Lower is a concrete dam located in Chester County, Pennsylvania, built in 1923. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 15 ft15 ft tall and 180 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Malvern Preparatory Lower
The primary purpose of Malvern Preparatory Lower is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Malvern Prep School (private). It impounds the Tr Crum Creek.
The dam stands 15 feet tall and stretches 180 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 20 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1923, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 01/24/2020.
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Location
| State | Pennsylvania |
| County | Chester |
| River/Stream | Tr Crum Creek |
| Coordinates | 40.02611, -75.50806 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 180 ft |
| Year Completed | 1923 (103 years old) |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Max Storage | 20 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Malvern Prep School |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/24/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | PA01860 |
| Federal ID | PA01860 |
| More Info | State Dam Safety Program |