Upper Beaver Subwatershed Site M-1
Upper Beaver Subwatershed Site M-1 is an earth dam located in Monona County, Iowa, built in 1967. It carries a Low hazard potential classification and has a poor condition assessment.
About Upper Beaver Subwatershed Site M-1
The primary purpose of Upper Beaver Subwatershed Site M-1 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-beaver Creek near Little Sioux.
The dam stands 60 feet tall and stretches 402 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 194 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks.
At 60 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Iowa |
| County | Monona |
| Nearest City | Little Sioux |
| River/Stream | Tr-beaver Creek |
| Coordinates | 42.06120, -95.84520 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 60 ft |
| Dam Height | 60 ft |
| Dam Length | 402 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 194 acre-ft |
| Max Storage | 194 acre-ft |
| Normal Storage | 137 acre-ft |
| Surface Area | 8 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 | Poor |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00717 |
| Federal ID | IA00717 |
| More Info | State Dam Safety Program |