| Portage Canal | Jefferson, WA | 21.4 miles | SE |
| Hill Ditch | Skagit, WA | 42.9 miles | NE |
| Lake Washington Ship Canal | King, WA | 48.8 miles | SE |
| Schell Ditch | Whatcom, WA | 56.4 miles | NE |
| Double Ditch | Whatcom, WA | 67.7 miles | NE |
| Mormon Ditch | Whatcom, WA | 67.8 miles | NE |
| Kamm Ditch | Whatcom, WA | 68.7 miles | NE |
| Walsh Lake Diversion Ditch | King, WA | 74.9 miles | SE |
| Smith Canal | Grays Harbor, WA | 80.7 miles | SW |
| Blooms Ditch | Thurston, WA | 82.1 miles | SE |
| Centralia Canal | Thurston, WA | 84.9 miles | SE |
| Yelm Ditch | Thurston, WA | 88.6 miles | SE |
| Electron Flume | Pierce, WA | 94.7 miles | SE |
| Drainage Ditch Number 1 | Pacific, WA | 102.6 miles | SW |
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