Port Huron Sga #4 is an earth dam located in St. Clair County, Michigan, built in 1966. It carries a Low hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 1,790 ft long. 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 Port Huron Sga #4
Port Huron Sga #4 is a dam in St. Clair, Michigan. The dam is owned by Mdnr Wildlife (state). It impounds the Tributary to Black River near Wadhams.
The dam stands 10 feet tall and stretches 1,790 feet across, creates a reservoir covering 45 acres, and has a maximum storage capacity of 180 acre-feet. Completed in 1966, the structure is well into its service life at over 50 years old.
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 02/16/1994. That was over 32 years ago.
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Location
| State | Michigan |
| County | St. Clair |
| Nearest City | Wadhams |
| River/Stream | Tributary to Black River |
| Coordinates | 43.04833, -82.58639 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 1,790 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 180 acre-ft |
| Max Storage | 180 acre-ft |
| Normal Storage | 126 acre-ft |
| Surface Area | 45 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Mdnr Wildlife |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 02/16/1994 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00811 |
| Federal ID | MI00811 |
| More Info | State Dam Safety Program |