Mill Picayune Watershed Site M-24-7 is an earth dam located in Shelby County, Iowa, built in 1972. It carries a Low hazard potential classification.
Dam profile
NID height · 35 ft35 ft tall and 725 ft long, taller than 80% 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-24-7
The primary purpose of Mill Picayune Watershed Site M-24-7 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 35 feet tall and stretches 725 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 382 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1972, 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 11/12/1986. That was over 39 years ago.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Iowa |
| County | Shelby |
| Nearest City | Manteno |
| River/Stream | Tr-mill Creek |
| Coordinates | 41.85770, -95.45000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 725 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 382 acre-ft |
| Max Storage | 382 acre-ft |
| Normal Storage | 111 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 2 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 |
| Last Inspection | 11/12/1986 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00986 |
| Federal ID | IA00986 |
| More Info | State Dam Safety Program |