| Soda Dam | |
| Location Map: | Idaho#USA |
| Location Map Caption: | Location in Idaho##Location in United States |
| Coordinates: | 42.6447°N -111.6964°W |
| Country: | United States |
| Location: | Caribou County, Idaho |
| Purpose: | hydroelectric power |
| Opening: | 1925 |
| Operator: | PacifiCorp |
| Dam Crosses: | Bear River |
| Dam Height: | 94feet |
| Dam Length: | 492feet |
| Res Name: | Alexander Reservoir |
| Res Capacity Total: | 15760acre feet |
| Res Capacity Active: | 15200acre feet |
| Res Surface: | 1.9sqmi |
| Res Elevation: | 1744m (5,722feet) |
Soda Dam, also known as Alexander Dam, is a dam in Caribou County, Idaho, directly west of the town of Soda Springs.
The concrete dam was originally constructed in 1925, with a current height of and a length of at its crest, since a 1991 re-construction.[1] [2] It impounds Bear River for hydroelectric power, one of the hydropower facilities owned and operated by the electric utility PacifiCorp.
The reservoir it creates, Alexander Reservoir, has a normal water surface of, a maximum capacity of 15,760 acre-feet, and a normal capacity of 15,200 acre-feet.[1] Recreation includes fishing, canoeing, and birdwatching.[3]