Riddle
Riddle is an earth dam located in St. Clair County, Alabama, built in 1951. It carries a Low hazard potential classification.
About Riddle
The primary purpose of Riddle is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mrs June Riddle (private). It impounds the Middle Black Creek near Margaret.
The dam stands 15 feet tall and stretches 150 feet across, and has a maximum storage capacity of 50 acre-feet. Completed in 1951, 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.
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Location
| State | Alabama |
| County | St. Clair |
| Nearest City | Margaret |
| River/Stream | Middle Black Creek |
| Coordinates | 33.70667, -86.44667 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Length | 150 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 50 acre-ft |
| Max Storage | 50 acre-ft |
| Normal Storage | 38 acre-ft |
| Max Discharge | 200 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | MRS JUNE RIDDLE |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | No |
Identifiers
| NID ID | AL01050 |
| Federal ID | AL01050 |
| More Info | State Dam Safety Program |