| Lower Baker Dam | |
| Coordinates: | 48.5475°N -121.7411°W |
| Country: | United States |
| Location: | Skagit County, Washington |
| Status: | In use |
| Opening: | 1925 |
| Owner: | Puget Sound Energy |
| Dam Type: | Concrete thick-arch |
| Dam Height: | 285feet |
| Dam Length: | 550feet |
| Dam Crosses: | Baker River |
| Spillway Type: | Uncontrolled overflow |
| Res Name: | Lake Shannon |
| Res Capacity Total: | 161470acre.ft[1] |
| Res Catchment: | 250sqmi |
| Res Surface: | 2190acres |
| Plant Hydraulic Head: | 280feet |
| Plant Capacity: | 79 MW |
| Plant Annual Gen: | 344,850,000 KWh[2] |
Lower Baker Dam (or simply Baker Dam) is a dam across the Baker River one mile north of Concrete, Washington. It forms a reservoir called Lake Shannon which stretches 7.5miles upstream. The dam is operated by Puget Sound Energy as part of the Baker River Hydroelectric Project.[3]
The dam has a thick arch design, and is 285feet high and 550feet long. It spans the Baker River in a narrow reach known as Eden Canyon, just above the river's confluence with the Skagit River. It is able to hold 161470acre.ft of water, of which 29426acre feet is reserved for flood control. At full capacity the dam's hydroelectric plant can generate 79 megawatts of power.[4] The other dam on this river, Upper Baker Dam, lies about 8miles upstream, and serves a similar purpose to Lower Baker.