| Sweetwater Canal | Nez Perce, ID | 9.6 miles | SE |
| Webb Creek Canal | Nez Perce, ID | 15 miles | SE |
| Weatherspoon Ditch | Baker, OR | 48 miles | SW |
| Lower Valley Ditch | Wallowa, OR | 56.2 miles | SW |
| Chamberlin Ditch | Wallowa, OR | 59 miles | SW |
| Clear Water Ditch | Wallowa, OR | 59.6 miles | SW |
| Cross Country Ditch | Wallowa, OR | 61.3 miles | SW |
| Wade Ditch | Wallowa, OR | 62.1 miles | SW |
| Poley-Allen Ditch | Wallowa, OR | 62.2 miles | SW |
| Westside Ditch | Wallowa, OR | 62.6 miles | SW |
| Sheep Ridge Ditch | Wallowa, OR | 62.7 miles | SW |
| Mill Creek Channel | Walla Walla, WA | 63.7 miles | SW |
| Allen Canyon Ditch | Wallowa, OR | 65.4 miles | SW |
| Island Ditch | Wallowa, OR | 66 miles | SW |
| Lower Alder Slope Ditch | Wallowa, OR | 66.1 miles | SW |
| Granger Ditch | Wallowa, OR | 66.6 miles | SW |
| Alder Slope Ditch | Wallowa, OR | 67 miles | SW |
| Bowlus Ditch | Umatilla, OR | 67.6 miles | SW |
| Big Bend Ditch | Wallowa, OR | 67.8 miles | SW |
| Wrenn Dobbin Ditch | Wallowa, OR | 67.8 miles | SW |
| Dorothy Ditch | Umatilla, OR | 68 miles | SW |
| Farmers Ditch | Wallowa, OR | 68.2 miles | SW |
| Silver Lake Ditch | Wallowa, OR | 68.4 miles | SW |
| Hurricane Ditch | Wallowa, OR | 68.5 miles | SW |
| Silver Grange Ditch | Wallowa, OR | 69.1 miles | SW |
| Spence Ditch | Umatilla, OR | 69.3 miles | SW |
| Coye Ditch | Wallowa, OR | 69.7 miles | SW |
| Consolidated Ditch | Wallowa, OR | 70 miles | SW |
| Zell Ditch | Umatilla, OR | 70.1 miles | SW |
| Milton Ditch | Umatilla, OR | 70.4 miles | SW |
| Moonshine Ditch | Wallowa, OR | 70.7 miles | SW |
| Pleasant View Canal | Umatilla, OR | 70.9 miles | SW |
| Hudson Bay Canal | Umatilla, OR | 71.8 miles | SW |
| Wallowa Valley Improvement Canal | Wallowa, OR | 71.8 miles | SW |
| Whitman Ditch | Walla Walla, WA | 72.8 miles | SW |
| Williams Ditch | Walla Walla, WA | 73.9 miles | SW |
| Burlingame Ditch | Walla Walla, WA | 74 miles | SW |
| Garden City Ditch | Walla Walla, WA | 74.8 miles | SW |
| Mud District Number 2 Canal | Walla Walla, WA | 74.8 miles | SW |
| Mud District Number 7 Canal | Walla Walla, WA | 76.4 miles | SW |
| Short Low Ditch (historical) | Walla Walla, WA | 76.5 miles | SW |
| Mud Creek Canal | Walla Walla, WA | 76.6 miles | SW |
| Short Low Ditch | Umatilla, OR | 76.9 miles | SW |
| Demaris Ditch | Walla Walla, WA | 77.4 miles | SW |
| White Ditch | Umatilla, OR | 77.4 miles | SW |
| Love Loney Ditch | Umatilla, OR | 77.6 miles | SW |
| State Ditch | Union, OR | 78.4 miles | SW |
| Mousser Hall Ditch | Walla Walla, WA | 79.8 miles | SW |
| Touchet East Side Ditch | Walla Walla, WA | 79.9 miles | SW |
| Gardena Ditch | Walla Walla, WA | 80 miles | SW |
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