Dillon Dam - Nashport Dike
Dillon Dam - Nashport Dike is an earth dam located in Muskingum County, Ohio, built in 1959. It carries a High hazard potential classification.
About Dillon Dam - Nashport Dike
The primary purpose of Dillon Dam - Nashport 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 - Huntington District (federal). It impounds the Licking River near Zanesville.
The dam stands 48 feet tall and stretches 1,600 feet across, and has a maximum storage capacity of 154,000 acre-feet. Completed in 1959, 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 09/18/2024.
At 48 feet, this dam is taller than 92% of dams nationwide.
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 Ohio 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 | Ohio |
| County | Muskingum |
| Nearest City | Zanesville |
| River/Stream | Licking River |
| Coordinates | 40.07495, -82.15691 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 48 ft |
| Dam Height | 48 ft |
| Dam Length | 1,600 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 154,000 acre-ft |
| Max Storage | 154,000 acre-ft |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | USACE - Huntington District |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 09/18/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH00007 |
| Federal ID | OH00007S001 |
| More Info | State Dam Safety Program |