| Uncle Tom Slough | Columbia, OR | 7.9 miles | SE |
| Ditch Number Ten | Cowlitz, WA | 16.9 miles | SE |
| Ditch Number Six | Cowlitz, WA | 17.3 miles | SE |
| Ditch Number Eight | Cowlitz, WA | 17.3 miles | SE |
| Skipanon Waterway | Clatsop, OR | 26.2 miles | SW |
| Lousignont Canal | Washington, OR | 45.4 miles | SE |
| Marquam Dry Lake Canal | Multnomah, OR | 46.4 miles | SE |
| Moroney Canal | Tillamook, OR | 48.8 miles | SW |
| Drainage Ditch Number 1 | Pacific, WA | 50.6 miles | NW |
| Blooms Ditch | Thurston, WA | 52.3 miles | NE |
| Smith Canal | Grays Harbor, WA | 53.4 miles | NW |
| China Ditch | Clark, WA | 54.1 miles | SE |
| Peninsula Drainage Canal | Multnomah, OR | 55.1 miles | SE |
| Big Ditch | Clark, WA | 56.6 miles | SE |
| Yelm Ditch | Thurston, WA | 63 miles | NE |
| Crown Zellerback Power Ditch | Clark, WA | 63.3 miles | SE |
| Centralia Canal | Thurston, WA | 63.4 miles | NE |
| Oswego Canal | Clackamas, OR | 64.5 miles | SE |
| Seely Ditch | Clackamas, OR | 67.9 miles | SE |
| Electron Flume | Pierce, WA | 79.6 miles | NE |
| Drescher Ditch | Marion, OR | 81.1 miles | SE |
| Jones Ditch | Marion, OR | 82.9 miles | SE |
| Lost Creek Ditch | Skamania, WA | 83 miles | SE |
| Walker Ditch | Marion, OR | 83.3 miles | SE |
| Lake Labish Ditch | Marion, OR | 84.2 miles | SE |
| Oak Grove Ditch | Hood River, OR | 89.9 miles | SE |
| Shelton Ditch | Marion, OR | 90.5 miles | SE |
| Mission Ditch | Marion, OR | 90.6 miles | SE |
| Low Line Ditch | Hood River, OR | 92.9 miles | SE |
| Dee Flat Ditch | Hood River, OR | 93.3 miles | SE |
| Farmers Ditch | Hood River, OR | 94.5 miles | SE |
| Highline Lateral | Hood River, OR | 96 miles | SE |
| Power Canal | Hood River, OR | 96.2 miles | SE |
| Central Lateral | Hood River, OR | 97.6 miles | SE |
| Highberger Ditch | Marion, OR | 97.8 miles | SE |
| East Fork Main Canal | Hood River, OR | 98.3 miles | SE |
| Mount Hood Canal | Hood River, OR | 98.3 miles | SE |
| Volmer Ditch | Hood River, OR | 98.3 miles | SE |
| Neal Creek Lateral | Hood River, OR | 98.6 miles | SE |
| Perrin Lateral | Marion, OR | 99.2 miles | SE |
| Glacier Ditch | Hood River, OR | 99.7 miles | SE |
| Sidney Power Ditch | Marion, OR | 99.8 miles | SE |
| Salem Ditch | Marion, OR | 100.7 miles | SE |
| Main Canal | Marion, OR | 100.8 miles | SE |
| Walsh Lake Diversion Ditch | King, WA | 105.5 miles | NE |
| Springer Ditch | Wasco, OR | 109.6 miles | SE |
| Frog Creek Ditch | Wasco, OR | 110.2 miles | SE |
| Lake Washington Ship Canal | King, WA | 110.5 miles | NE |
| Wolf Run Ditch | Wasco, OR | 111.8 miles | SE |
| Clear Creek Ditch | Wasco, OR | 113.2 miles | SE |
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