Oswego Lake
| Oswego Lake | |
|---|---|
Lakewood Bay (connected to the main lake in 1928) | |
| Location | Lake Oswego, Clackamas County, Oregon |
| Coordinates | 45°24′34″N 122°41′47″W / 45.40944°N 122.69639°W |
| Type | Kolk depression/Reservoir |
| Primary inflows | Tualatin River, Springbrook Creek |
| Primary outflows | Willamette River (via Oswego Creek) |
| Catchment area | 6.6 sq mi (17 km2) |
| Basin countries | United States |
| Max. length | 3 mi (4.8 km) |
| Max. width | 0.3 mi (0.48 km) |
| Surface area | 431.7 acres (1.747 km2) |
| Average depth | 26 ft (7.9 m) |
| Max. depth | 55 ft (17 m) |
| Water volume | 10,055 acre⋅ft (12,403,000 m3) |
| Residence time | 2 months |
| Shore length1 | 11.95 mi (19.23 km) |
| Surface elevation | 99 ft (30 m) |
| Islands | Jantzen Island |
| Settlements | Lake Oswego |
| 1 Shore length is not a well-defined measure. | |
Oswego Lake is in Clackamas County, Oregon, United States, and is completely surrounded by the city of Lake Oswego. Though the lake is naturally occurring (a former channel of the Tualatin River), it has been significantly altered because of the concrete dam that has increased its size to 431.7 acres (1.747 km2). The United States Geological Survey records the official name as Lake Oswego and, because of its artificially increased size, classifies it as a reservoir. To distinguish it from the city, however, the lake is usually called Oswego Lake.