Little Sioux Dam is a gravity dam located in Harrison County, Iowa, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 7 ft7 ft tall and 200 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Little Sioux Dam
Little Sioux Dam is a dam in Harrison, Iowa. The dam is owned by Little Sioux Inter-county Drainage District (local government). It impounds the Little Sioux River near Little Sioux.
The dam stands 7 feet tall and stretches 200 feet across, creates a reservoir covering 143 acres, has a maximum storage capacity of 500 acre-feet, and collects water from a drainage area of 4,507 square miles. Completed in 1963, 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.
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Location
| State | Iowa |
| County | Harrison |
| Nearest City | Little Sioux |
| River/Stream | Little Sioux River |
| Coordinates | 41.85780, -96.10980 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 200 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 500 acre-ft |
| Max Storage | 500 acre-ft |
| Normal Storage | 500 acre-ft |
| Surface Area | 143 acres |
| Drainage Area | 4,507 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Little Sioux Inter-county Drainage District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03062 |
| Federal ID | IA03062 |
| More Info | State Dam Safety Program |