Mill Picayune Watershed Site S-4 is an earth dam located in Harrison County, Iowa, built in 1991. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 410 ft long, taller than 65% 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 S-4
Mill Picayune Watershed Site S-4 is a dam in Harrison, Iowa. The dam is owned by Harrison County Swcd (local government). It impounds the South Picayune Creek near Woodbine.
The dam stands 29 feet tall and stretches 410 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 112 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1991, the structure is 35 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.
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Location
| State | Iowa |
| County | Harrison |
| Nearest City | Woodbine |
| River/Stream | South Picayune Creek |
| Coordinates | 41.70000, -95.62000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 410 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 112 acre-ft |
| Max Storage | 112 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 4 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Harrison County Swcd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02616 |
| Federal ID | IA02616 |
| More Info | State Dam Safety Program |