Raystown Dam - Hesston Dike
Raystown Dam - Hesston Dike is an earth dam located in Huntingdon County, Pennsylvania, built in 1973. It carries a High hazard potential classification.
About Raystown Dam - Hesston Dike
The primary purpose of Raystown Dam - Hesston Dike is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Usace - Baltimore District (federal). It impounds the Raystown Branch Juniata River near Huntingdon.
The dam stands 15 feet tall and stretches 177 feet across, creates a reservoir covering 8,300 acres, has a maximum storage capacity of 871,000 acre-feet, and collects water from a drainage area of 960 square miles. Completed in 1973, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 08/10/2023.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Pennsylvania dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Pennsylvania |
| County | Huntingdon |
| Nearest City | Huntingdon |
| River/Stream | Raystown Branch Juniata River |
| Coordinates | 40.40378, -78.12691 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 177 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 871,000 acre-ft |
| Max Storage | 871,000 acre-ft |
| Surface Area | 8,300 acres |
| Drainage Area | 960 sq mi |
| Max Discharge | 301,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | USACE - Baltimore District |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 08/10/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | PA00004 |
| Federal ID | PA00004S001 |
| More Info | State Dam Safety Program |