Sylvan Lake Dam
High HazardFair Condition
Location
| State | South Dakota |
| County | Custer |
| Nearest City | HILL CITY |
| River/Stream | TR-Spring Creek |
| Coordinates | 43.84717, -103.56610 |
Physical Characteristics
| Dam Type | Arch |
| NID Height | 37 ft |
| Dam Height | 37 ft |
| Dam Length | 57 ft |
| Year Completed | 1906 (120 years old) |
Storage & Hydraulics
| NID Storage | 240 acre-ft |
| Max Storage | 240 acre-ft |
| Normal Storage | 214 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,880 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | GF&P |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 10/24/2023 |