Lake Ohana Dam #1 is an earth dam located in Mills County, Iowa, built in 2007. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 46 ft46 ft tall and 1,070 ft long, taller than 91% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Lake Ohana Dam #1
Lake Ohana Dam #1 is a dam in Mills, Iowa. The dam is owned by N-t Lands LLC (private). It impounds the Tr- Pony Creek near Pacific Junction.
The dam stands 46 feet tall and stretches 1,070 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 434 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2007, the structure is relatively new.
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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 07/10/2024.
At 46 feet, this dam is taller than 91% of dams nationwide.
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Location
| State | Iowa |
| County | Mills |
| Nearest City | Pacific Junction |
| River/Stream | Tr- Pony Creek |
| Coordinates | 41.12310, -95.74860 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 46 ft |
| Dam Height | 46 ft |
| Dam Length | 1,070 ft |
| Year Completed | 2007 (19 years old) |
Storage & Hydraulics
| NID Storage | 434 acre-ft |
| Max Storage | 434 acre-ft |
| Normal Storage | 262 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | N-t Lands LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 07/10/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03527 |
| Federal ID | IA03527 |
| More Info | State Dam Safety Program |