| Ditch Number Eight | Cowlitz, WA | 9.5 miles | NW |
| Ditch Number Ten | Cowlitz, WA | 10.1 miles | NW |
| Ditch Number Six | Cowlitz, WA | 10.1 miles | NW |
| Uncle Tom Slough | Columbia, OR | 19.6 miles | NW |
| Marquam Dry Lake Canal | Multnomah, OR | 28.4 miles | SE |
| China Ditch | Clark, WA | 30.5 miles | SE |
| Big Ditch | Clark, WA | 33.6 miles | SE |
| Peninsula Drainage Canal | Multnomah, OR | 34.9 miles | SE |
| Lousignont Canal | Washington, OR | 37.2 miles | SW |
| Crown Zellerback Power Ditch | Clark, WA | 40.2 miles | SE |
| Oswego Canal | Clackamas, OR | 47.5 miles | SE |
| Skipanon Waterway | Clatsop, OR | 50.8 miles | NW |
| Seely Ditch | Clackamas, OR | 52.5 miles | SE |
| Lost Creek Ditch | Skamania, WA | 57.6 miles | SE |
| Blooms Ditch | Thurston, WA | 59.3 miles | NW |
| Yelm Ditch | Thurston, WA | 60 miles | NE |
| Moroney Canal | Tillamook, OR | 60.3 miles | SW |
| Centralia Canal | Thurston, WA | 62 miles | NE |
| Oak Grove Ditch | Hood River, OR | 64.2 miles | SE |
| Drescher Ditch | Marion, OR | 66.3 miles | SE |
| Low Line Ditch | Hood River, OR | 67.1 miles | SE |
| Dee Flat Ditch | Hood River, OR | 67.6 miles | SE |
| Farmers Ditch | Hood River, OR | 68.6 miles | SE |
| Walker Ditch | Marion, OR | 69.6 miles | SE |
| Highline Lateral | Hood River, OR | 70.1 miles | SE |
| Power Canal | Hood River, OR | 70.3 miles | SE |
| Smith Canal | Grays Harbor, WA | 70.6 miles | NW |
| Jones Ditch | Marion, OR | 70.7 miles | SW |
| Electron Flume | Pierce, WA | 71.1 miles | NE |
| Central Lateral | Hood River, OR | 71.8 miles | SE |
| Lake Labish Ditch | Marion, OR | 72.1 miles | SW |
| East Fork Main Canal | Hood River, OR | 72.5 miles | SE |
| Mount Hood Canal | Hood River, OR | 72.6 miles | SE |
| Neal Creek Lateral | Hood River, OR | 72.7 miles | SE |
| Volmer Ditch | Hood River, OR | 72.8 miles | SE |
| Glacier Ditch | Hood River, OR | 74.2 miles | SE |
| Hellroaring Ditch | Yakima, WA | 74.5 miles | NE |
| Sage Flat Ditch | Klickitat, WA | 74.5 miles | SE |
| Drainage Ditch Number 1 | Pacific, WA | 74.7 miles | NW |
| Shelton Ditch | Marion, OR | 79.7 miles | SW |
| Mission Ditch | Marion, OR | 79.8 miles | SW |
| Springer Ditch | Wasco, OR | 84.3 miles | SE |
| Highberger Ditch | Marion, OR | 85.3 miles | SW |
| Frog Creek Ditch | Wasco, OR | 86.1 miles | SE |
| Wolf Run Ditch | Wasco, OR | 86.1 miles | SE |
| Perrin Lateral | Marion, OR | 87.5 miles | SW |
| Salem Ditch | Marion, OR | 87.7 miles | SE |
| Main Canal | Marion, OR | 88.5 miles | SW |
| Clear Creek Ditch | Wasco, OR | 89.1 miles | SE |
| Orchard Ridge Ditch | Wasco, OR | 89.4 miles | SE |
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