Little Sioux Dam
Little Sioux Dam is a gravity dam located in Harrison County, Iowa, built in 1963. It carries a Low hazard potential classification.
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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
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 Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03062 |
| Federal ID | IA03062 |
| More Info | State Dam Safety Program |