Walling Subwatershed Sta 20+86 #1b is an earth dam located in Woodbury County, Iowa, built in 1953. It carries a Low hazard potential classification.
Dam profile
NID height · 35 ft35 ft tall and 750 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 Walling Subwatershed Sta 20+86 #1b
The primary purpose of Walling Subwatershed Sta 20+86 #1b 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 Woodbury County Swcd (local government). It impounds the Tr-little Sioux River near Oto.
The dam stands 35 feet tall and stretches 750 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 34 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1953, 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 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Iowa |
| County | Woodbury |
| Nearest City | Oto |
| River/Stream | Tr-little Sioux River |
| Coordinates | 42.33870, -95.86290 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 750 ft |
| Year Completed | 1953 (73 years old) |
Storage & Hydraulics
| NID Storage | 34 acre-ft |
| Max Storage | 34 acre-ft |
| Normal Storage | 17 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Woodbury County Swcd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01804 |
| Federal ID | IA01804 |
| More Info | State Dam Safety Program |