Ottogan Dam
Ottogan Dam is an earth dam located in Allegan County, Michigan, built in 1989. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Ottogan Dam
The primary purpose of Ottogan Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Dept Of Ag, Ottogan Inter-co Drain (private). It impounds the Ottogan Inter-county Drain near Holland.
The dam stands 18 feet tall and stretches 200 feet across, has a maximum storage capacity of 75 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1989, the structure is 37 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 09/10/2018.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Michigan |
| County | Allegan |
| Nearest City | Holland |
| River/Stream | Ottogan Inter-county Drain |
| Coordinates | 42.76718, -86.16706 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 200 ft |
| Year Completed | 1989 (37 years old) |
Storage & Hydraulics
| NID Storage | 75 acre-ft |
| Max Storage | 75 acre-ft |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Dept of Ag, Ottogan Inter-Co Drain |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/10/2018 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI02639 |
| Federal ID | MI02639 |
| More Info | State Dam Safety Program |