| Lake Washington Ship Canal | King, WA | 27.5 miles | NE |
| Blooms Ditch | Thurston, WA | 36.5 miles | SW |
| Centralia Canal | Thurston, WA | 37 miles | SE |
| Yelm Ditch | Thurston, WA | 40.8 miles | SE |
| Portage Canal | Jefferson, WA | 40.9 miles | NE |
| Walsh Lake Diversion Ditch | King, WA | 42.5 miles | SE |
| Smith Canal | Grays Harbor, WA | 46.5 miles | SW |
| Electron Flume | Pierce, WA | 50.1 miles | SE |
| Hill Ditch | Skagit, WA | 67.4 miles | NE |
| Drainage Ditch Number 1 | Pacific, WA | 74.2 miles | SW |
| Ditch Number Six | Cowlitz, WA | 87.7 miles | SW |
| Ditch Number Ten | Cowlitz, WA | 88.1 miles | SW |
| Ditch Number Eight | Cowlitz, WA | 88.9 miles | SW |
| Uncle Tom Slough | Columbia, OR | 93.4 miles | SW |
| Main Canal | Kittitas, WA | 93.8 miles | SE |
| Schell Ditch | Whatcom, WA | 96.8 miles | NE |
| Skipanon Waterway | Clatsop, OR | 100.6 miles | SW |
| Yakima Tieton Main Canal | Yakima, WA | 105.1 miles | SE |
| John Cox Ditch | Yakima, WA | 113.6 miles | SE |
| Shaw Knox Ditch | Yakima, WA | 113.8 miles | SE |
| Lesh Ditch | Yakima, WA | 114.9 miles | SE |
| Hellroaring Ditch | Yakima, WA | 116.9 miles | SE |
| Sage Flat Ditch | Klickitat, WA | 122.8 miles | SE |
| Toppenish Lateral | Yakima, WA | 124 miles | SE |
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