Carlson/walsh Dam is an earth dam located in Pottawattamie County, Iowa, built in 1969. It carries a Low hazard potential classification.
Dam profile
NID height · 45 ft45 ft tall and 616 ft long, taller than 90% 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 Carlson/walsh Dam
The primary purpose of Carlson/walsh 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 R&r Carlson and a Walsh (private). It impounds the Tr-mosquito Creek near Underwood.
The dam stands 45 feet tall and stretches 616 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 136 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1969, 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 45 feet, this dam is taller than 90% of dams nationwide.
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Location
| State | Iowa |
| County | Pottawattamie |
| Nearest City | Underwood |
| River/Stream | Tr-mosquito Creek |
| Coordinates | 41.45560, -95.66210 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 45 ft |
| Dam Length | 616 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 136 acre-ft |
| Max Storage | 136 acre-ft |
| Normal Storage | 97 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | R&r Carlson and a Walsh |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/05/1961 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00953 |
| Federal ID | IA00953 |
| More Info | State Dam Safety Program |