Chehalis River (Washington)
The Chehalis River (/ʃəˈheɪlɪs/ shə-HAY-lis) is a river in Washington in the United States. It originates in several forks in southwestern Washington, flows east, then north, then west, in a large curve, before emptying into Grays Harbor, an estuary of the Pacific Ocean. The river is the largest solely contained drainage basin in the state.
| Chehalis River | |
|---|---|
Chehalis River Valley (left), Grays Harbor (middle distance) and Satsop River Valley (along bottom) | |
Map of the Chehalis River watershed | |
Mouth of the Chehalis River in Washington Chehalis River (Washington) (the United States) | |
| Location | |
| Country | United States |
| State | Washington |
| Counties | Grays Harbor, Thurston, Lewis |
| Cities | Aberdeen, Centralia, Chehalis |
| Physical characteristics | |
| Source | |
| • location | Lewis County |
| • coordinates | 46°27′6″N 123°17′30″W |
| • elevation | 1,000 ft (300 m) |
| Mouth | Pacific Ocean |
• location | Grays Harbor, Aberdeen |
• coordinates | 46°57′29″N 123°50′5″W |
• elevation | 0 ft (0 m) |
| Length | 115 mi (185 km) |
| Basin size | 2,660 sq mi (6,900 km2) |
| Discharge | |
| • location | near Satsop, WA |
| • average | 6,425 cu ft/s (181.9 m3/s) |
| • minimum | 440 cu ft/s (12 m3/s) |
| • maximum | 47,000 cu ft/s (1,300 m3/s) |
| Discharge | |
| • location | mouth (Grays Harbor) |
| • average | 11,208 cu ft/s (317.4 m3/s) |
| Basin features | |
| Tributaries | |
| • right | South Fork Chehalis River, Newaukum River, Skookumchuck River, Satsop River, Wynoochee River, Wishkah River |
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