Simpson Dam
Simpson Dam is an earth dam located in Iosco County, Michigan, built in 1930. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Simpson Dam
The primary purpose of Simpson Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by John Simpson (private). It impounds the Trib To Etton Creek near Oscoda.
The dam stands 12 feet tall, creates a reservoir covering 25 acres, has a maximum storage capacity of 120 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1930, 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 07/31/2015. That was over 10 years ago.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Michigan |
| County | Iosco |
| Nearest City | Oscoda |
| River/Stream | Trib To Etton Creek |
| Coordinates | 44.50833, -83.37291 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Normal Storage | 80 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 130 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | John Simpson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/31/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00832 |
| Federal ID | MI00832 |
| More Info | State Dam Safety Program |