Del-co Upland Storage Reservoir No. 5
Del-co Upland Storage Reservoir No. 5 is an earth dam located in Delaware County, Ohio, built in 2004. It carries a High hazard potential classification and has a fair condition assessment.
About Del-co Upland Storage Reservoir No. 5
The primary purpose of Del-co Upland Storage Reservoir No. 5 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Del-co Water Company, Inc. (public utility). It impounds the Olentangy River near Mount Air.
The dam stands 45 feet tall and stretches 7,973 feet across, creates a reservoir covering 84 acres, has a maximum storage capacity of 3,376 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2004, the structure is relatively new.
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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 05/31/2023.
At 45 feet, this dam is taller than 91% 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 | Delaware |
| Nearest City | Mount Air |
| River/Stream | Olentangy River |
| Coordinates | 40.20500, -83.08056 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 45 ft |
| Dam Length | 7,973 ft |
| Year Completed | 2004 (22 years old) |
Storage & Hydraulics
| NID Storage | 3,376 acre-ft |
| Max Storage | 3,376 acre-ft |
| Normal Storage | 3,070 acre-ft |
| Surface Area | 84 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 173 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Del-Co Water Company, Inc. |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 05/31/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH03066 |
| Federal ID | OH03066 |
| More Info | State Dam Safety Program |