Schwertley Dam is an earth dam located in Harrison County, Iowa, built in 1959. It carries a Low hazard potential classification.
Dam profile
NID height · 55 ft55 ft tall and 552 ft long, taller than 94% 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 Schwertley Dam
The primary purpose of Schwertley Dam 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 Schwertley (private). It impounds the Tr-allen Creek near Missouri River.
The dam stands 55 feet tall and stretches 552 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 303 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1959, 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 10/05/1961. That was over 65 years ago.
At 55 feet, this dam is taller than 94% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Harrison |
| Nearest City | Missouri River |
| River/Stream | Tr-allen Creek |
| Coordinates | 41.64460, -95.91180 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 55 ft |
| Dam Height | 55 ft |
| Dam Length | 552 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 303 acre-ft |
| Max Storage | 303 acre-ft |
| Normal Storage | 113 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 2 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Schwertley |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/05/1961 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00474 |
| Federal ID | IA00474 |
| More Info | State Dam Safety Program |