Irving is a gravity dam located in Barry County, Michigan, built in 1939. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 690 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Irving
The primary purpose of Irving is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. It impounds the Thornapple River near Irving.
The dam stands 18 feet tall and stretches 690 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 235 acre-feet, and collects water from a drainage area of 495 square miles. Completed in 1939, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 07/17/2024.
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Location
| State | Michigan |
| County | Barry |
| Nearest City | Irving |
| River/Stream | Thornapple River |
| Coordinates | 42.69060, -85.41294 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 690 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 235 acre-ft |
| Max Storage | 235 acre-ft |
| Normal Storage | 135 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 495 sq mi |
| Max Discharge | 13,600 cfs |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner Type | Not Listed |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/17/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00542 |
| Federal ID | MI00542 |
| More Info | State Dam Safety Program |