Ash Hollow Dry Dam
Ash Hollow Dry Dam is an earth dam located in Lancaster County, Nebraska, built in 2017. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Ash Hollow Dry Dam
The primary purpose of Ash Hollow Dry Dam 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 Lower Platte South Natural Resources District (local government). It impounds the Ash Hollow Creek near Waverly.
The dam stands 39 feet tall and stretches 2,384 feet across, creates a reservoir covering 0 acres, has a maximum storage capacity of 1,744 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 2017, 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 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 05/22/2024.
At 39 feet, this dam is taller than 86% 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 Nebraska 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 | Nebraska |
| County | Lancaster |
| Nearest City | Waverly |
| River/Stream | Ash Hollow Creek |
| Coordinates | 40.89728, -96.52621 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 33 ft |
| Dam Length | 2,384 ft |
| Year Completed | 2017 (9 years old) |
Storage & Hydraulics
| NID Storage | 1,744 acre-ft |
| Max Storage | 1,744 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 6,660 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Lower Platte South Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/22/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NE08364 |
| Federal ID | NE08364 |
| More Info | State Dam Safety Program |