Nilan Dam is an earth dam located in Pottawattamie County, Iowa, built in 1962. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 498 ft long, taller than 68% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Nilan Dam
The primary purpose of Nilan Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Wilbert Nilan (private). It impounds the Tr-west Nishnabota River near Carson.
The dam stands 30 feet tall and stretches 498 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 45 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1962, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 10/29/1963. That was over 62 years ago.
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Location
| State | Iowa |
| County | Pottawattamie |
| Nearest City | Carson |
| River/Stream | Tr-west Nishnabota River |
| Coordinates | 41.28460, -95.43770 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 498 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 45 acre-ft |
| Max Storage | 45 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Wilbert Nilan |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/29/1963 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00945 |
| Federal ID | IA00945 |
| More Info | State Dam Safety Program |