Porter Lake Dam
Porter Lake Dam is an earth dam located in Jefferson County, Missouri, built in 1956. It carries a Low hazard potential classification.
About Porter Lake Dam
The primary purpose of Porter Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Missouri Pacific Corp (private). It impounds the Tr To Mississippi River near Prarie Du Rocher,illinois.
The dam stands 25 feet tall, creates a reservoir covering 5 acres, has a maximum storage capacity of 67 acre-feet, and collects water from a drainage area of 150 square miles. Completed in 1956, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Missouri |
| County | Jefferson |
| Nearest City | Prarie Du Rocher,illinois |
| River/Stream | Tr To Mississippi River |
| Coordinates | 38.18121, -90.36238 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 67 acre-ft |
| Max Storage | 67 acre-ft |
| Normal Storage | 33 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 150 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | MISSOURI PACIFIC CORP |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO30415 |
| Federal ID | MO30415 |
| More Info | State Dam Safety Program |