Croy Subwatershed Site M-10500 is an earth dam located in Monona County, Iowa, built in 1952. It carries a Low hazard potential classification.
Dam profile
NID height · 67 ft67 ft tall, taller than 96% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Croy Subwatershed Site M-10500
The primary purpose of Croy Subwatershed Site M-10500 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- Maple River near Litle Sioux.
The dam stands 67 feet tall, creates a reservoir covering 5 acres, has a maximum storage capacity of 139 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1952, 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.
At 67 feet, this dam is taller than 96% of all dams in the United States.
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Location
| State | Iowa |
| County | Monona |
| Nearest City | Litle Sioux |
| River/Stream | Tr- Maple River |
| Coordinates | 42.02920, -95.89630 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 67 ft |
| Dam Height | 67 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 139 acre-ft |
| Max Storage | 139 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 5 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 assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02743 |
| Federal ID | IA02743 |
| More Info | State Dam Safety Program |