Mill Picayune Watershed Site M-22-1 is an earth dam located in Shelby County, Iowa, built in 1978. It carries a Low hazard potential classification.
Dam profile
NID height · 34 ft34 ft tall and 550 ft long, taller than 78% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Mill Picayune Watershed Site M-22-1
The primary purpose of Mill Picayune Watershed Site M-22-1 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 Shelby County Swcd (local government). It impounds the Tr-mill Creek near Manteno.
The dam stands 34 feet tall and stretches 550 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 233 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1978, the structure is 48 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 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Iowa |
| County | Shelby |
| Nearest City | Manteno |
| River/Stream | Tr-mill Creek |
| Coordinates | 41.81720, -95.48570 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 550 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 233 acre-ft |
| Max Storage | 233 acre-ft |
| Normal Storage | 102 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Shelby County Swcd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01989 |
| Federal ID | IA01989 |
| More Info | State Dam Safety Program |