Morse Lake Overflow Dike is a gravity dam located in King County, Washington, built in 1904. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 440 ft long, taller than 68% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Morse Lake Overflow Dike
The primary purpose of Morse Lake Overflow Dike is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Seattle City Light (local government). It impounds the Cedar River near Cedar Falls.
The dam stands 30 feet tall and stretches 440 feet across, creates a reservoir covering 1,682 acres, has a maximum storage capacity of 75,000 acre-feet, and collects water from a drainage area of 81 square miles. Completed in 1904, the structure is over a century 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 | Washington |
| County | King |
| Nearest City | Cedar Falls |
| River/Stream | Cedar River |
| Coordinates | 47.40960, -121.72545 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 30 ft |
| Dam Length | 440 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 75,000 acre-ft |
| Max Storage | 75,000 acre-ft |
| Normal Storage | 75,000 acre-ft |
| Surface Area | 1,682 acres |
| Drainage Area | 81 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Seattle City Light |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00256 |
| Federal ID | WA00256 |
| More Info | State Dam Safety Program |