Gray Dam is an earth dam located in Tama County, Iowa, built in 1946. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 500 ft long, taller than 50% 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 Gray Dam
The primary purpose of Gray 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 John a Gray (private). It impounds the Tr-iowa River near Iowa River.
The dam stands 25 feet tall and stretches 500 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 80 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1946, the structure is well-established, with more than 75 years of service.
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 08/02/1979. That was over 47 years ago.
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Location
| State | Iowa |
| County | Tama |
| Nearest City | Iowa River |
| River/Stream | Tr-iowa River |
| Coordinates | 42.00390, -92.63300 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 500 ft |
| Year Completed | 1946 (80 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | John a Gray |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/02/1979 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02082 |
| Federal ID | IA02082 |
| More Info | State Dam Safety Program |