Sylvia Lake Dam Grays Harbor Cnty
Significant HazardPoor ConditionEmergency Action Plan: Yes
Location
| State | Washington |
| County | Grays Harbor |
| Nearest City | Montesano |
| River/Stream | Sylvia Creek |
| Coordinates | 46.99608, -123.59838 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 23 ft |
| Dam Length | 120 ft |
| Year Completed | 1918 (108 years old) |
Storage & Hydraulics
| NID Storage | 550 acre-ft |
| Max Storage | 550 acre-ft |
| Normal Storage | 320 acre-ft |
| Surface Area | 32 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 1,510 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | WA PARKS |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 11/12/2024 |
| Emergency Action Plan | Yes |