Pontiac Motor Division Detention Basin is an other dam located in Oakland County, Michigan, built in 1982. It carries a Significant hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall. 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 Pontiac Motor Division Detention Basin
The primary purpose of Pontiac Motor Division Detention Basin 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 Pontiac Motor Division (private). It impounds the Montcalm Storm Sewer near Pontiac.
The dam stands 12 feet tall, creates a reservoir covering 1 acres, has a maximum storage capacity of 10 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1982, the structure is 44 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. The most recent inspection on record was 06/13/1982. That was over 44 years ago.
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Location
| State | Michigan |
| County | Oakland |
| Nearest City | Pontiac |
| River/Stream | Montcalm Storm Sewer |
| Coordinates | 42.65500, -83.29333 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Year Completed | 1982 (44 years old) |
Storage & Hydraulics
| NID Storage | 10 acre-ft |
| Max Storage | 10 acre-ft |
| Normal Storage | 10 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 58 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Pontiac Motor Division |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 06/13/1982 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI01367 |
| Federal ID | MI01367 |
| More Info | State Dam Safety Program |