Lake Wanalain Dam
High HazardFair ConditionEmergency Action Plan: Yes
Location
| State | South Dakota |
| County | Brule |
| Nearest City | CHAMBERLAIN |
| River/Stream | American Creek |
| Coordinates | 43.81095, -99.25208 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 250 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 8,378 acre-ft |
| Max Storage | 8,378 acre-ft |
| Normal Storage | 460 acre-ft |
| Surface Area | 110 acres |
| Drainage Area | 70 sq mi |
| Max Discharge | 7,467 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | S&PL |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 10/03/2022 |
| Emergency Action Plan | Yes |