Arnold-armstrong Subwtrshd Sta27+80 #26
Arnold-armstrong Subwtrshd Sta27+80 #26 is an earth dam located in Monona County, Iowa, built in 1961. It carries a Low hazard potential classification.
About Arnold-armstrong Subwtrshd Sta27+80 #26
The primary purpose of Arnold-armstrong Subwtrshd Sta27+80 #26 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 Monona County Swcd (local government). It impounds the Tr-maple River near Castana.
The dam stands 44 feet tall and stretches 440 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 58 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1961, 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 44 feet, this dam is taller than 90% of dams nationwide.
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Location
| State | Iowa |
| County | Monona |
| Nearest City | Castana |
| River/Stream | Tr-maple River |
| Coordinates | 42.15110, -95.85530 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 44 ft |
| Dam Height | 44 ft |
| Dam Length | 440 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 58 acre-ft |
| Max Storage | 58 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Monona County SWCD |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00790 |
| Federal ID | IA00790 |
| More Info | State Dam Safety Program |