Assman #4 Grade Stabilization Structure is an earth dam located in Crawford County, Iowa, built in 2010. It carries a Low hazard potential classification.
Dam profile
NID height · 39 ft39 ft tall and 370 ft long, taller than 85% 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 Assman #4 Grade Stabilization Structure
The primary purpose of Assman #4 Grade Stabilization Structure 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 Paul Assman (private). It impounds the Tr-boyer River near Boyer River Floodplain.
The dam stands 39 feet tall and stretches 370 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 103 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2010, the structure is relatively new.
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 39 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Iowa |
| County | Crawford |
| Nearest City | Boyer River Floodplain |
| River/Stream | Tr-boyer River |
| Coordinates | 42.06000, -95.33540 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 370 ft |
| Year Completed | 2010 (16 years old) |
Storage & Hydraulics
| NID Storage | 103 acre-ft |
| Max Storage | 103 acre-ft |
| Normal Storage | 56 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 107 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Paul Assman |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04093 |
| Federal ID | IA04093 |
| More Info | State Dam Safety Program |