| China Ditch | Clark, WA | 19.6 miles | SW |
| Big Ditch | Clark, WA | 23.4 miles | SW |
| Crown Zellerback Power Ditch | Clark, WA | 28.1 miles | SE |
| Marquam Dry Lake Canal | Multnomah, OR | 28.6 miles | SW |
| Peninsula Drainage Canal | Multnomah, OR | 29.3 miles | SW |
| Ditch Number Eight | Cowlitz, WA | 29.3 miles | NW |
| Ditch Number Six | Cowlitz, WA | 29.6 miles | NW |
| Ditch Number Ten | Cowlitz, WA | 29.9 miles | NW |
| Lost Creek Ditch | Skamania, WA | 37.3 miles | SE |
| Uncle Tom Slough | Columbia, OR | 40.1 miles | NW |
| Oswego Canal | Clackamas, OR | 43.7 miles | SW |
| Lousignont Canal | Washington, OR | 44.4 miles | SW |
| Oak Grove Ditch | Hood River, OR | 44.5 miles | SE |
| Low Line Ditch | Hood River, OR | 47.4 miles | SE |
| Dee Flat Ditch | Hood River, OR | 48.2 miles | SE |
| Farmers Ditch | Hood River, OR | 48.5 miles | SE |
| Seely Ditch | Clackamas, OR | 49.8 miles | SW |
| Power Canal | Hood River, OR | 50 miles | SE |
| Highline Lateral | Hood River, OR | 50.1 miles | SE |
| Central Lateral | Hood River, OR | 51.9 miles | SE |
| Neal Creek Lateral | Hood River, OR | 52.6 miles | SE |
| East Fork Main Canal | Hood River, OR | 52.8 miles | SE |
| Mount Hood Canal | Hood River, OR | 53.1 miles | SE |
| Volmer Ditch | Hood River, OR | 53.9 miles | SE |
| Sage Flat Ditch | Klickitat, WA | 54.7 miles | NE |
| Glacier Ditch | Hood River, OR | 55.2 miles | SE |
| Hellroaring Ditch | Yakima, WA | 55.5 miles | NE |
| Drescher Ditch | Marion, OR | 62.6 miles | SW |
| Yelm Ditch | Thurston, WA | 63 miles | NW |
| Springer Ditch | Wasco, OR | 65.5 miles | SE |
| Centralia Canal | Thurston, WA | 66.1 miles | NW |
| Wolf Run Ditch | Wasco, OR | 66.7 miles | SE |
| Walker Ditch | Marion, OR | 66.8 miles | SW |
| Electron Flume | Pierce, WA | 68.3 miles | NE |
| Jones Ditch | Marion, OR | 69.2 miles | SW |
| Frog Creek Ditch | Wasco, OR | 69.4 miles | SE |
| Blooms Ditch | Thurston, WA | 69.5 miles | NW |
| Orchard Ridge Ditch | Wasco, OR | 70 miles | SE |
| Lake Labish Ditch | Marion, OR | 70.7 miles | SW |
| Skipanon Waterway | Clatsop, OR | 71.2 miles | NW |
| Clear Creek Ditch | Wasco, OR | 72.3 miles | SE |
| Dufur Ditch | Wasco, OR | 73.5 miles | SE |
| Highland Ditch | Wasco, OR | 75 miles | SE |
| Lost Boulder Ditch | Wasco, OR | 75.2 miles | SE |
| Threemile Ditch | Wasco, OR | 75.5 miles | SE |
| Moroney Canal | Tillamook, OR | 76.1 miles | SW |
| Rock Creek Ditch | Wasco, OR | 78.2 miles | SE |
| Shelton Ditch | Marion, OR | 78.9 miles | SW |
| Mission Ditch | Marion, OR | 79.1 miles | SW |
| Highline Ditch | Wasco, OR | 81.3 miles | SE |
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