U-b Subwatershed Site 2-2
U-b Subwatershed Site 2-2 is an earth dam located in Monona County, Iowa, built in 1962. It carries a Low hazard potential classification.
About U-b Subwatershed Site 2-2
The primary purpose of U-b Subwatershed Site 2-2 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 Monona County Swcd (local government). It impounds the Tr-little Sioux River near Little Sioux.
The dam stands 51 feet tall and stretches 366 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 225 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 06/28/1990. That was over 35 years ago.
At 51 feet, this dam is taller than 93% of dams nationwide.
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Location
| State | Iowa |
| County | Monona |
| Nearest City | Little Sioux |
| River/Stream | Tr-little Sioux River |
| Coordinates | 42.03790, -95.84450 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 51 ft |
| Dam Height | 51 ft |
| Dam Length | 366 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 225 acre-ft |
| Max Storage | 225 acre-ft |
| Normal Storage | 153 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Monona County SWCD |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 06/28/1990 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00777 |
| Federal ID | IA00777 |
| More Info | State Dam Safety Program |