# List of canals in Oregon

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List of canals in Oregon contains all canals identified by the USGS in the U.S. state of Oregon. The USGS defines a canal as a manmade waterway used by watercraft or for drainage, irrigation, mining, or water power (ditch, lateral).
There are 661 listed as of December 4, 2008.
| name | county | elevation | coordinate | USGS Map | GNIS ID |
| A Canal | Klamath | 4,127 ft (1,258 m) | 42°10′31″N 121°42′01″W﻿ / ﻿42.17528°N 121.70028°W﻿ / 42.17528; -121.70028﻿ (A Canal (Klamath County, Oregon)) | Altamont | 1116746 |
| A Canal | Klamath | 4,150 ft (1,260 m) | 42°38′49″N 122°00′34″W﻿ / ﻿42.64694°N 122.00944°W﻿ / 42.64694; -122.00944﻿ (A Canal (Klamath County, Oregon)) | Mares Egg Spring | 1155306 |
| A Drain | Malheur | 2,155 ft (657 m) | 44°02′05″N 117°00′39″W﻿ / ﻿44.03472°N 117.01083°W﻿ / 44.03472; -117.01083﻿ (A Drain (Malheur County, Oregon)) | Malheur Butte | 1131829 |
| A Line Canal | Umatilla | 561 ft (171 m) | 45°49′34″N 119°16′43″W﻿ / ﻿45.82611°N 119.27861°W﻿ / 45.82611; -119.27861﻿ (A Line Canal (Umatilla County, Oregon)) | Hermiston | 1116747 |
| Ady Canal | Klamath | 4,098 ft (1,249 m) | 42°01′59″N 121°50′37″W﻿ / ﻿42.03306°N 121.84361°W﻿ / 42.03306; -121.84361﻿ (Ady Canal (Klamath County, Oregon)) | Worden | 1161246 |
| Albany Santiam Canal | Linn | 259 ft (79 m) | 44°36′04″N 123°01′34″W﻿ / ﻿44.60111°N 123.02611°W﻿ / 44.60111; -123.02611﻿ (Albany Santiam Canal (Linn County, Oregon)) | Tangent | 1116798 |
| Alder Slope Ditch | Wallowa | 4,354 ft (1,327 m) | 45°23′29″N 117°19′22″W﻿ / ﻿45.39139°N 117.32278°W﻿ / 45.39139; -117.32278﻿ (Alder Slope Ditch (Wallowa County, Oregon)) | Enterprise | 1137094 |
| Allen Canyon Ditch | Wallowa | 5,604 ft (1,708 m) | 45°26′35″N 117°28′08″W﻿ / ﻿45.44306°N 117.46889°W﻿ / 45.44306; -117.46889﻿ (Allen Canyon Ditch (Wallowa County, Oregon)) | Lostine | 1137700 |
| Allen Ditch | Malheur | 2,959 ft (902 m) | 43°43′58″N 118°04′37″W﻿ / ﻿43.73278°N 118.07694°W﻿ / 43.73278; -118.07694﻿ (Allen Ditch (Malheur County, Oregon)) | Juntura | 1116878 |
| Allen Ditch | Lake | 5,279 ft (1,609 m) | 42°25′40″N 120°05′49″W﻿ / ﻿42.42778°N 120.09694°W﻿ / 42.42778; -120.09694﻿ (Allen Ditch (Lake County, Oregon)) | Drake Peak NE | 1131109 |
| Allen Drain | Malheur | 2,211 ft (674 m) | 43°41′30″N 117°01′51″W﻿ / ﻿43.69167°N 117.03083°W﻿ / 43.69167; -117.03083﻿ (Allen Drain (Malheur County, Oregon)) | Adrian | 1116879 |
| Altnow Ditch | Harney | 3,658 ft (1,115 m) | 43°52′55″N 118°18′04″W﻿ / ﻿43.88194°N 118.30111°W﻿ / 43.88194; -118.30111﻿ (Altnow Ditch (Harney County, Oregon)) | Cottonwood Reservoir | 1154208 |
| Amazon Creek Diversion Channel | Lane | 381 ft (116 m) | 44°04′32″N 123°13′45″W﻿ / ﻿44.07556°N 123.22917°W﻿ / 44.07556; -123.22917﻿ (Amazon Creek Diversion Channel (Lane County, Oregon)) | Eugene West | 1116907 |
| Anawalt Drain | Malheur | 4,295 ft (1,309 m) | 43°01′58″N 117°19′36″W﻿ / ﻿43.03278°N 117.32667°W﻿ / 43.03278; -117.32667﻿ (Anawalt Drain (Malheur County, Oregon)) | Cow Lakes | 1116922 |
| Anderson Ditch | Malheur | 3,799 ft (1,158 m) | 42°42′45″N 117°48′49″W﻿ / ﻿42.71250°N 117.81361°W﻿ / 42.71250; -117.81361﻿ (Anderson Ditch (Malheur County, Oregon)) | Anderson Reservoir | 1130447 |
| Annex Canal | Malheur | 2,106 ft (642 m) | 44°13′46″N 116°58′44″W﻿ / ﻿44.22944°N 116.97889°W﻿ / 44.22944; -116.97889﻿ (Annex Canal (Malheur County, Oregon)) | Weiser South | 1116961 |
| Antelope Feeder Canal | Malheur | 4,370 ft (1,330 m) | 42°58′26″N 117°09′30″W﻿ / ﻿42.97389°N 117.15833°W﻿ / 42.97389; -117.15833﻿ (Antelope Feeder Canal (Malheur County, Oregon)) | Antelope Reservoir | 1116974 |
| Arnold Canal | Deschutes | 3,917 ft (1,194 m) | 43°59′29″N 121°21′24″W﻿ / ﻿43.99139°N 121.35667°W﻿ / 43.99139; -121.35667﻿ (Arnold Canal (Deschutes County, Oregon)) | Lava Butte | 1137298 |
| Arritola Ditch | Malheur | 4,747 ft (1,447 m) | 42°43′14″N 117°05′54″W﻿ / ﻿42.72056°N 117.09833°W﻿ / 42.72056; -117.09833﻿ (Arritola Ditch (Malheur County, Oregon)) | Juniper Point | 1130441 |
| Ashcraft Flume | Lake | 4,892 ft (1,491 m) | 42°05′56″N 120°33′10″W﻿ / ﻿42.09889°N 120.55278°W﻿ / 42.09889; -120.55278﻿ (Ashcraft Flume (Lake County, Oregon)) | Fitzwater Point | 1137317 |
| Ashland Lateral | Jackson | 3,816 ft (1,163 m) | 42°09′43″N 122°30′40″W﻿ / ﻿42.16194°N 122.51111°W﻿ / 42.16194; -122.51111﻿ (Ashland Lateral (Jackson County, Oregon)) | Emigrant Lake | 1137320 |
| Ausmus Canal | Harney | 4,104 ft (1,251 m) | 43°24′25″N 118°51′06″W﻿ / ﻿43.40694°N 118.85167°W﻿ / 43.40694; -118.85167﻿ (Ausmus Canal (Harney County, Oregon)) | Lawen | 1117095 |
| B Canal | Klamath | 4,127 ft (1,258 m) | 42°10′35″N 121°39′45″W﻿ / ﻿42.17639°N 121.66250°W﻿ / 42.17639; -121.66250﻿ (B Canal (Klamath County, Oregon)) | Altamont | 1117115 |
| B Canal | Klamath | 4,144 ft (1,263 m) | 42°37′14″N 121°59′59″W﻿ / ﻿42.62056°N 121.99972°W﻿ / 42.62056; -121.99972﻿ (B Canal (Klamath County, Oregon)) | Agency Lake | 1154981 |
| Bagley Ditch | Lake | 4,344 ft (1,324 m) | 42°38′25″N 120°30′59″W﻿ / ﻿42.64028°N 120.51639°W﻿ / 42.64028; -120.51639﻿ (Bagley Ditch (Lake County, Oregon)) | Paisley | 1137404 |
| Baker Municipal Aqueduct | Baker | 4,485 ft (1,367 m) | 44°46′03″N 117°53′43″W﻿ / ﻿44.76750°N 117.89528°W﻿ / 44.76750; -117.89528﻿ (Baker Municipal Aqueduct (Baker County, Oregon)) | Wingville | 1164072 |
| Baldock Ditch | Baker | 3,422 ft (1,043 m) | 44°47′16″N 117°48′43″W﻿ / ﻿44.78778°N 117.81194°W﻿ / 44.78778; -117.81194﻿ (Baldock Ditch (Baker County, Oregon)) | Baker City | 1164074 |
| Baldwin Ditch | Crook | 2,949 ft (899 m) | 44°14′46″N 120°52′24″W﻿ / ﻿44.24611°N 120.87333°W﻿ / 44.24611; -120.87333﻿ (Baldwin Ditch (Crook County, Oregon)) | Stearns Butte | 1153708 |
| Baldwin Ditch | Lake | 4,859 ft (1,481 m) | 42°11′35″N 120°28′29″W﻿ / ﻿42.19306°N 120.47472°W﻿ / 42.19306; -120.47472﻿ (Baldwin Ditch (Lake County, Oregon)) | Lakeview Airport | 1153747 |
| Baltimore Ditch | Josephine | 1,496 ft (456 m) | 42°13′29″N 123°15′33″W﻿ / ﻿42.22472°N 123.25917°W﻿ / 42.22472; -123.25917﻿ (Baltimore Ditch (Josephine County, Oregon)) | Williams | 1137493 |
| Banks Ditch | Baker | 2,638 ft (804 m) | 44°34′18″N 117°27′43″W﻿ / ﻿44.57167°N 117.46194°W﻿ / 44.57167; -117.46194﻿ (Banks Ditch (Baker County, Oregon)) | Durkee | 1117223 |
| Basche Ditch | Baker | 2,762 ft (842 m) | 44°52′52″N 117°38′32″W﻿ / ﻿44.88111°N 117.64222°W﻿ / 44.88111; -117.64222﻿ (Basche Ditch (Baker County, Oregon)) | Keating NW | 1117286 |
| Beers Ditch | Malheur | 3,281 ft (1,000 m) | 44°21′05″N 117°38′49″W﻿ / ﻿44.35139°N 117.64694°W﻿ / 44.35139; -117.64694﻿ (Beers Ditch (Malheur County, Oregon)) | Cow Valley East | 1131896 |
| Bend Feed Canal | Deschutes | 3,491 ft (1,064 m) | 44°05′31″N 121°19′39″W﻿ / ﻿44.09194°N 121.32750°W﻿ / 44.09194; -121.32750﻿ (Bend Feed Canal (Deschutes County, Oregon)) | Bend | 1153111 |
| Big Bend Ditch | Wallowa | 4,150 ft (1,260 m) | 45°21′57″N 117°11′43″W﻿ / ﻿45.36583°N 117.19528°W﻿ / 45.36583; -117.19528﻿ (Big Bend Ditch (Wallowa County, Oregon)) | Joseph | 1137974 |
| Big Creek Ditch | Union | 3,635 ft (1,108 m) | 44°57′46″N 117°36′44″W﻿ / ﻿44.96278°N 117.61222°W﻿ / 44.96278; -117.61222﻿ (Big Creek Ditch (Union County, Oregon)) | Sawtooth Ridge | 1117608 |
| Big Flat Ditch | Baker | 3,944 ft (1,202 m) | 44°32′18″N 118°10′30″W﻿ / ﻿44.53833°N 118.17500°W﻿ / 44.53833; -118.17500﻿ (Big Flat Ditch (Baker County, Oregon)) | Unity Reservoir | 1138029 |
| Big Red S Canal | Harney | 4,117 ft (1,255 m) | 43°26′50″N 118°58′14″W﻿ / ﻿43.44722°N 118.97056°W﻿ / 43.44722; -118.97056﻿ (Big Red S Canal (Harney County, Oregon)) | Redess | 1132013 |
| Biggs Ditch | Malheur | 2,339 ft (713 m) | 43°56′25″N 117°24′59″W﻿ / ﻿43.94028°N 117.41639°W﻿ / 43.94028; -117.41639﻿ (Biggs Ditch (Malheur County, Oregon)) | Vines Hill | 1129747 |
| Birch Creek Ditch | Malheur | 3,770 ft (1,150 m) | 44°23′45″N 117°41′49″W﻿ / ﻿44.39583°N 117.69694°W﻿ / 44.39583; -117.69694﻿ (Birch Creek Ditch (Malheur County, Oregon)) | Bridgeport | 1131888 |
| Bishop Ditch | Malheur | 2,507 ft (764 m) | 43°33′00″N 117°05′49″W﻿ / ﻿43.55000°N 117.09694°W﻿ / 43.55000; -117.09694﻿ (Bishop Ditch (Malheur County, Oregon)) | Graveyard Point | 1130425 |
| Black Willow Siphon | Malheur | 2,520 ft (770 m) | 43°41′45″N 117°10′49″W﻿ / ﻿43.69583°N 117.18028°W﻿ / 43.69583; -117.18028﻿ (Black Willow Siphon (Malheur County, Oregon)) | Owyhee Dam | 1131226 |
| Blanton Drain | Malheur | 2,182 ft (665 m) | 44°00′30″N 117°02′44″W﻿ / ﻿44.00833°N 117.04556°W﻿ / 44.00833; -117.04556﻿ (Blanton Drain (Malheur County, Oregon)) | Malheur Butte | 1131831 |
| Blodgett Ditch | Josephine | 1,680 ft (510 m) | 42°15′24″N 123°17′04″W﻿ / ﻿42.25667°N 123.28444°W﻿ / 42.25667; -123.28444﻿ (Blodgett Ditch (Josephine County, Oregon)) | Murphy | 1155194 |
| Blue Mountain Ditch | Grant | 2,802 ft (854 m) | 44°24′23″N 119°12′10″W﻿ / ﻿44.40639°N 119.20278°W﻿ / 44.40639; -119.20278﻿ (Blue Mountain Ditch (Grant County, Oregon)) | Wolfinger Butte | 1152793 |
| Blue Springs Ditch | Klamath | 4,176 ft (1,273 m) | 42°41′24″N 122°02′52″W﻿ / ﻿42.69000°N 122.04778°W﻿ / 42.69000; -122.04778﻿ (Blue Springs Ditch (Klamath County, Oregon)) | Mares Egg Spring | 1134812 |
| Blume Zilkey Ditch | Baker | 3,583 ft (1,092 m) | 44°57′49″N 118°02′03″W﻿ / ﻿44.96361°N 118.03417°W﻿ / 44.96361; -118.03417﻿ (Blume Zilkey Ditch (Baker County, Oregon)) | Rock Creek | 1117875 |
| Boston Drain | Malheur | 2,303 ft (702 m) | 43°55′55″N 117°19′14″W﻿ / ﻿43.93194°N 117.32056°W﻿ / 43.93194; -117.32056﻿ (Boston Drain (Malheur County, Oregon)) | Vale West | 1129748 |
| Bowlus Ditch | Umatilla | 1,470 ft (450 m) | 45°53′49″N 118°17′54″W﻿ / ﻿45.89694°N 118.29833°W﻿ / 45.89694; -118.29833﻿ (Bowlus Ditch (Umatilla County, Oregon)) | Bowlus Hill | 1638731 |
| Bridge Creek Canal | Harney | 4,173 ft (1,272 m) | 42°51′50″N 118°52′19″W﻿ / ﻿42.86389°N 118.87194°W﻿ / 42.86389; -118.87194﻿ (Bridge Creek Canal (Harney County, Oregon)) | Page Springs | 1118071 |
| Bridgepoint Ditch | Jackson | 1,201 ft (366 m) | 42°16′39″N 123°13′18″W﻿ / ﻿42.27750°N 123.22167°W﻿ / 42.27750; -123.22167﻿ (Bridgepoint Ditch (Jackson County, Oregon)) | Applegate | 1135262 |
| Brogan Ditch | Malheur | 2,562 ft (781 m) | 44°13′03″N 117°28′06″W﻿ / ﻿44.21750°N 117.46833°W﻿ / 44.21750; -117.46833﻿ (Brogan Ditch (Malheur County, Oregon)) | Jamieson | 1118097 |
| Brooks Ditch | Baker | 4,856 ft (1,480 m) | 44°56′26″N 117°14′07″W﻿ / ﻿44.94056°N 117.23528°W﻿ / 44.94056; -117.23528﻿ (Brooks Ditch (Baker County, Oregon)) | Jimtown | 1138656 |
| Brosman Ditch | Malheur | 2,162 ft (659 m) | 44°02′21″N 117°01′43″W﻿ / ﻿44.03917°N 117.02861°W﻿ / 44.03917; -117.02861﻿ (Brosman Ditch (Malheur County, Oregon)) | Malheur Butte | 1118114 |
| Brown Loennig Ditch | Baker | 3,586 ft (1,093 m) | 44°54′20″N 118°01′23″W﻿ / ﻿44.90556°N 118.02306°W﻿ / 44.90556; -118.02306﻿ (Brown Loennig Ditch (Baker County, Oregon)) | Rock Creek | 1118129 |
| Brownell Ditch | Umatilla | 331 ft (101 m) | 45°55′14″N 119°18′42″W﻿ / ﻿45.92056°N 119.31167°W﻿ / 45.92056; -119.31167﻿ (Brownell Ditch (Umatilla County, Oregon)) | Umatilla | 1118131 |
| Browns Feed Canal | Harney | 4,134 ft (1,260 m) | 43°10′14″N 118°16′44″W﻿ / ﻿43.17056°N 118.27889°W﻿ / 43.17056; -118.27889﻿ (Browns Feed Canal (Harney County, Oregon)) | South Fork Reservoir | 1132020 |
| Brownsville Ditch | Linn | 371 ft (113 m) | 44°23′26″N 122°57′01″W﻿ / ﻿44.39056°N 122.95028°W﻿ / 44.39056; -122.95028﻿ (Brownsville Ditch (Linn County, Oregon)) | Brownsville | 1118141 |
| Buchanan Ditch | Baker | 6,581 ft (2,006 m) | 45°02′16″N 117°04′06″W﻿ / ﻿45.03778°N 117.06833°W﻿ / 45.03778; -117.06833﻿ (Buchanan Ditch (Baker County, Oregon)) | Deadman Point | 1133858 |
| Buena Vista Canal | Harney | 4,131 ft (1,259 m) | 43°06′13″N 118°53′58″W﻿ / ﻿43.10361°N 118.89944°W﻿ / 43.10361; -118.89944﻿ (Buena Vista Canal (Harney County, Oregon)) | Jackass Butte | 1118258 |
| Bulger Ditch | Baker | 3,953 ft (1,205 m) | 44°57′53″N 118°03′02″W﻿ / ﻿44.96472°N 118.05056°W﻿ / 44.96472; -118.05056﻿ (Bulger Ditch (Baker County, Oregon)) | Rock Creek | 1118265 |
| Bull Ditch | Harney | 4,108 ft (1,252 m) | 43°15′15″N 118°51′34″W﻿ / ﻿43.25417°N 118.85944°W﻿ / 43.25417; -118.85944﻿ (Bull Ditch (Harney County, Oregon)) | Malheur Lake West | 1132011 |
| Bullock Drain | Malheur | 2,251 ft (686 m) | 43°41′58″N 117°04′29″W﻿ / ﻿43.69944°N 117.07472°W﻿ / 43.69944; -117.07472﻿ (Bullock Drain (Malheur County, Oregon)) | Adrian | 1118299 |
| Bully Creek Siphon | Malheur | 2,415 ft (736 m) | 43°59′42″N 117°21′57″W﻿ / ﻿43.99500°N 117.36583°W﻿ / 43.99500; -117.36583﻿ (Bully Creek Siphon (Malheur County, Oregon)) | Vale West | 1118302 |
| Busse Canal | Harney | 4,121 ft (1,256 m) | 43°11′55″N 118°50′55″W﻿ / ﻿43.19861°N 118.84861°W﻿ / 43.19861; -118.84861﻿ (Busse Canal (Harney County, Oregon)) | Jackass Butte NE | 1118373 |
| Butte Ditch | Harney | 4,108 ft (1,252 m) | 43°15′15″N 118°53′24″W﻿ / ﻿43.25417°N 118.89000°W﻿ / 43.25417; -118.89000﻿ (Butte Ditch (Harney County, Oregon)) | The Narrows | 1132028 |
| Butte Drain | Malheur | 2,195 ft (669 m) | 44°00′45″N 117°06′14″W﻿ / ﻿44.01250°N 117.10389°W﻿ / 44.01250; -117.10389﻿ (Butte Drain (Malheur County, Oregon)) | Malheur Butte | 1131832 |
| Byron Ditch | Grant | 4,760 ft (1,450 m) | 44°09′25″N 118°51′34″W﻿ / ﻿44.15694°N 118.85944°W﻿ / 44.15694; -118.85944﻿ (Byron Ditch (Grant County, Oregon)) | Big Canyon | 1129509 |
| C Canal | Klamath | 4,091 ft (1,247 m) | 42°07′20″N 121°42′47″W﻿ / ﻿42.12222°N 121.71306°W﻿ / 42.12222; -121.71306﻿ (C Canal (Klamath County, Oregon)) | Lost River | 1118430 |
| C Canal | Klamath | 4,144 ft (1,263 m) | 42°37′09″N 121°59′34″W﻿ / ﻿42.61917°N 121.99278°W﻿ / 42.61917; -121.99278﻿ (C Canal (Klamath County, Oregon)) | Agency Lake | 1154982 |
| C-G Cutoff | Klamath | 4,091 ft (1,247 m) | 42°08′50″N 121°41′20″W﻿ / ﻿42.14722°N 121.68889°W﻿ / 42.14722; -121.68889﻿ (C-G Cutoff (Klamath County, Oregon)) | Altamont | 1118432 |
| Cables Ditch | Harney | 3,438 ft (1,048 m) | 43°26′30″N 118°14′04″W﻿ / ﻿43.44167°N 118.23444°W﻿ / 43.44167; -118.23444﻿ (Cables Ditch (Harney County, Oregon)) | McEwen Butte | 1131824 |
| Caledonia Canal | Klamath | 4,147 ft (1,264 m) | 42°17′11″N 121°55′37″W﻿ / ﻿42.28639°N 121.92694°W﻿ / 42.28639; -121.92694﻿ (Caledonia Canal (Klamath County, Oregon)) | Howard Bay | 1161299 |
| Camp Creek Ditch | Baker | 3,750 ft (1,140 m) | 44°29′10″N 118°05′09″W﻿ / ﻿44.48611°N 118.08583°W﻿ / 44.48611; -118.08583﻿ (Camp Creek Ditch (Baker County, Oregon)) | Hereford | 1131458 |
| Carnes Ditch | Union | 3,825 ft (1,166 m) | 45°01′35″N 118°01′55″W﻿ / ﻿45.02639°N 118.03194°W﻿ / 45.02639; -118.03194﻿ (Carnes Ditch (Union County, Oregon)) | Tucker Flat | 1139382 |
| Cascade Canal | Klamath | 5,732 ft (1,747 m) | 42°25′04″N 122°14′07″W﻿ / ﻿42.41778°N 122.23528°W﻿ / 42.41778; -122.23528﻿ (Cascade Canal (Klamath County, Oregon)) | Lake of the Woods North | 1139413 |
| Catherine Creek Highline Canal | Union | 2,779 ft (847 m) | 45°14′59″N 117°51′06″W﻿ / ﻿45.24972°N 117.85167°W﻿ / 45.24972; -117.85167﻿ (Catherine Creek Highline Canal (Union County, Oregon)) | Union | 1130901 |
| Cavin Ditch | Baker | 4,265 ft (1,300 m) | 44°25′27″N 118°15′04″W﻿ / ﻿44.42417°N 118.25111°W﻿ / 44.42417; -118.25111﻿ (Cavin Ditch (Baker County, Oregon)) | Rail Gulch | 1153973 |
| Center Canal | Harney | 4,144 ft (1,263 m) | 43°02′30″N 118°50′37″W﻿ / ﻿43.04167°N 118.84361°W﻿ / 43.04167; -118.84361﻿ (Center Canal (Harney County, Oregon)) | Diamond Swamp | 1118778 |
| Center Canal | Klamath | 4,098 ft (1,249 m) | 42°03′18″N 121°48′27″W﻿ / ﻿42.05500°N 121.80750°W﻿ / 42.05500; -121.80750﻿ (Center Canal (Klamath County, Oregon)) | Worden | 1161308 |
| Central Alkali Drain | Canyon (ID) | 2,205 ft (672 m) | 43°44′13″N 117°01′57″W﻿ / ﻿43.73694°N 117.03250°W﻿ / 43.73694; -117.03250﻿ (Central Alkali Drain (Canyon County, Idaho)) | Adrian | 371956 |
| Central Alkali Drain | Malheur | 2,205 ft (672 m) | 43°44′15″N 117°02′10″W﻿ / ﻿43.73750°N 117.03611°W﻿ / 43.73750; -117.03611﻿ (Central Alkali Drain (Malheur County, Oregon)) | Adrian | 1118779 |
| Central Canal | Klamath | 4,147 ft (1,264 m) | 42°38′14″N 122°01′06″W﻿ / ﻿42.63722°N 122.01833°W﻿ / 42.63722; -122.01833﻿ (Central Canal (Klamath County, Oregon)) | Mares Egg Spring | 1135755 |
| Central Lateral | Hood River | 1,545 ft (471 m) | 45°35′54″N 121°32′17″W﻿ / ﻿45.59833°N 121.53806°W﻿ / 45.59833; -121.53806﻿ (Central Lateral (Hood River County, Oregon)) | Parkdale | 1139544 |
| Central Oregon Canal | Deschutes | 3,366 ft (1,026 m) | 44°04′04″N 121°02′02″W﻿ / ﻿44.06778°N 121.03389°W﻿ / 44.06778; -121.03389﻿ (Central Oregon Canal (Deschutes County, Oregon)) | Alfalfa | 1139545 |
| Chambeam Ditch | Baker | 2,717 ft (828 m) | 44°34′54″N 117°30′32″W﻿ / ﻿44.58167°N 117.50889°W﻿ / 44.58167; -117.50889﻿ (Chambeam Ditch (Baker County, Oregon)) | Lost Basin | 1116727 |
| Chamberlin Ditch | Wallowa | 2,976 ft (907 m) | 45°34′12″N 117°34′06″W﻿ / ﻿45.57000°N 117.56833°W﻿ / 45.57000; -117.56833﻿ (Chamberlin Ditch (Wallowa County, Oregon)) | Wallowa | 1116572 |
| Chance Lateral | Malheur | 2,382 ft (726 m) | 43°42′32″N 117°01′38″W﻿ / ﻿43.70889°N 117.02722°W﻿ / 43.70889; -117.02722﻿ (Chance Lateral (Malheur County, Oregon)) | Adrian | 1118812 |
| China Creek Ditch | Baker | 4,101 ft (1,250 m) | 44°33′16″N 118°10′34″W﻿ / ﻿44.55444°N 118.17611°W﻿ / 44.55444; -118.17611﻿ (China Creek Ditch (Baker County, Oregon)) | Unity Reservoir | 1139671 |
| China Ditch | Gilliam | 292 ft (89 m) | 45°43′11″N 120°12′09″W﻿ / ﻿45.71972°N 120.20250°W﻿ / 45.71972; -120.20250﻿ (China Ditch (Gilliam County, Oregon)) | Arlington | 1118906 |
| China Ditch | Jackson | 1,850 ft (560 m) | 42°10′50″N 123°01′10″W﻿ / ﻿42.18056°N 123.01944°W﻿ / 42.18056; -123.01944﻿ (China Ditch (Jackson County, Oregon)) | Ruch | 1139674 |
| Clarks Creek Ditch | Baker | 3,635 ft (1,108 m) | 44°29′15″N 117°48′56″W﻿ / ﻿44.48750°N 117.81556°W﻿ / 44.48750; -117.81556﻿ (Clarks Creek Ditch (Baker County, Oregon)) | Wendt Butte | 1118977 |
| Clear Creek Ditch | Wasco | 3,228 ft (984 m) | 45°08′17″N 121°35′49″W﻿ / ﻿45.13806°N 121.59694°W﻿ / 45.13806; -121.59694﻿ (Clear Creek Ditch (Wasco County, Oregon)) | Post Point | 1139795 |
| Clear Water Ditch | Wallowa | 3,094 ft (943 m) | 45°32′44″N 117°31′13″W﻿ / ﻿45.54556°N 117.52028°W﻿ / 45.54556; -117.52028﻿ (Clear Water Ditch (Wallowa County, Oregon)) | Wallowa | 1139809 |
| Clearwater Canal Number 2 | Douglas | 3,225 ft (983 m) | 43°14′54″N 122°22′29″W﻿ / ﻿43.24833°N 122.37472°W﻿ / 43.24833; -122.37472﻿ (Clearwater Canal Number 2 (Douglas County, Oregon)) | Garwood Butte | 1134857 |
| Cleary Ditch | Baker | 3,566 ft (1,087 m) | 44°30′03″N 117°57′18″W﻿ / ﻿44.50083°N 117.95500°W﻿ / 44.50083; -117.95500﻿ (Cleary Ditch (Baker County, Oregon)) | Brannan Gulch | 1119008 |
| Cleary Ditch | Baker | 5,289 ft (1,612 m) | 44°36′41″N 118°00′04″W﻿ / ﻿44.61139°N 118.00111°W﻿ / 44.61139; -118.00111﻿ (Cleary Ditch (Baker County, Oregon)) | Hereford | 1131457 |
| Clement Ditch | Baker | 3,556 ft (1,084 m) | 44°29′53″N 117°51′05″W﻿ / ﻿44.49806°N 117.85139°W﻿ / 44.49806; -117.85139﻿ (Clement Ditch (Baker County, Oregon)) | Wendt Butte | 1119012 |
| Cleveland Ditch | Harney | 4,108 ft (1,252 m) | 43°59′40″N 118°41′30″W﻿ / ﻿43.99444°N 118.69167°W﻿ / 43.99444; -118.69167﻿ (Cleveland Ditch (Harney County, Oregon)) | Van | 1160907 |
| Cloverdale Ditch | Deschutes | 3,104 ft (946 m) | 44°18′00″N 121°27′55″W﻿ / ﻿44.30000°N 121.46528°W﻿ / 44.30000; -121.46528﻿ (Cloverdale Ditch (Deschutes County, Oregon)) | Henkle Butte | 1139857 |
| Coates Drain | Malheur | 2,402 ft (732 m) | 43°37′11″N 117°02′05″W﻿ / ﻿43.61972°N 117.03472°W﻿ / 43.61972; -117.03472﻿ (Coates Drain (Malheur County, Oregon)) | Graveyard Point | 1119061 |
| Coker Butte Lateral | Jackson | 1,283 ft (391 m) | 42°23′54″N 122°52′50″W﻿ / ﻿42.39833°N 122.88056°W﻿ / 42.39833; -122.88056﻿ (Coker Butte Lateral (Jackson County, Oregon)) | Sams Valley | 1134760 |
| Cole Ditch | Malheur | 2,730 ft (830 m) | 44°15′43″N 117°32′43″W﻿ / ﻿44.26194°N 117.54528°W﻿ / 44.26194; -117.54528﻿ (Cole Ditch (Malheur County, Oregon)) | Becker Creek | 1119130 |
| Colt Ware Ditch | Baker | 3,691 ft (1,125 m) | 44°29′36″N 118°07′41″W﻿ / ﻿44.49333°N 118.12806°W﻿ / 44.49333; -118.12806﻿ (Colt Ware Ditch (Baker County, Oregon)) | Unity | 1153975 |
| Columbia Southern Canal | Deschutes | 3,481 ft (1,061 m) | 44°08′19″N 121°23′21″W﻿ / ﻿44.13861°N 121.38917°W﻿ / 44.13861; -121.38917﻿ (Columbia Southern Canal (Deschutes County, Oregon)) | Tumalo Dam | 1140015 |
| Conn Ditch | Lake | 4,482 ft (1,366 m) | 42°41′50″N 120°34′14″W﻿ / ﻿42.69722°N 120.57056°W﻿ / 42.69722; -120.57056﻿ (Conn Ditch (Lake County, Oregon)) | Paisley | 1153796 |
| Consolidated Ditch | Wallowa | 4,485 ft (1,367 m) | 45°20′32″N 117°16′58″W﻿ / ﻿45.34222°N 117.28278°W﻿ / 45.34222; -117.28278﻿ (Consolidated Ditch (Wallowa County, Oregon)) | Chief Joseph Mountain | 1140048 |
| Cook Ditch | Baker | 3,697 ft (1,127 m) | 44°30′00″N 118°07′20″W﻿ / ﻿44.50000°N 118.12222°W﻿ / 44.50000; -118.12222﻿ (Cook Ditch (Baker County, Oregon)) | Beaverdam Creek | 1153974 |
| Corbell Ditch | Klamath | 4,265 ft (1,300 m) | 42°34′34″N 121°41′34″W﻿ / ﻿42.57611°N 121.69278°W﻿ / 42.57611; -121.69278﻿ (Corbell Ditch (Klamath County, Oregon)) | S'Ocholis Canyon | 1154826 |
| Cornstock Ditch | Jackson | 1,568 ft (478 m) | 42°09′34″N 123°02′59″W﻿ / ﻿42.15944°N 123.04972°W﻿ / 42.15944; -123.04972﻿ (Cornstock Ditch (Jackson County, Oregon)) | Ruch | 1155053 |
| Corral Ditch | Baker | 3,405 ft (1,038 m) | 44°47′46″N 117°48′24″W﻿ / ﻿44.79611°N 117.80667°W﻿ / 44.79611; -117.80667﻿ (Corral Ditch (Baker County, Oregon)) | Baker City | 1164082 |
| Correll Ditch | Baker | 3,465 ft (1,056 m) | 44°46′30″N 117°51′22″W﻿ / ﻿44.77500°N 117.85611°W﻿ / 44.77500; -117.85611﻿ (Correll Ditch (Baker County, Oregon)) | Baker City | 1164083 |
| Cory Ditch | Harney | 4,101 ft (1,250 m) | 43°25′00″N 118°30′39″W﻿ / ﻿43.41667°N 118.51083°W﻿ / 43.41667; -118.51083﻿ (Cory Ditch (Harney County, Oregon)) | Crane | 1132056 |
| Coughanour Ditch | Union | 3,632 ft (1,107 m) | 45°01′39″N 118°00′46″W﻿ / ﻿45.02750°N 118.01278°W﻿ / 45.02750; -118.01278﻿ (Coughanour Ditch (Union County, Oregon)) | Tucker Flat | 1140251 |
| Courtney Ditch | Umatilla | 574 ft (175 m) | 45°46′36″N 119°15′50″W﻿ / ﻿45.77667°N 119.26389°W﻿ / 45.77667; -119.26389﻿ (Courtney Ditch (Umatilla County, Oregon)) | Hermiston | 1119401 |
| Coye Ditch | Wallowa | 4,272 ft (1,302 m) | 45°20′34″N 117°14′17″W﻿ / ﻿45.34278°N 117.23806°W﻿ / 45.34278; -117.23806﻿ (Coye Ditch (Wallowa County, Oregon)) | Joseph | 1140304 |
| Coyote Drain | Malheur | 2,146 ft (654 m) | 44°09′50″N 116°55′44″W﻿ / ﻿44.16389°N 116.92889°W﻿ / 44.16389; -116.92889﻿ (Coyote Drain (Malheur County, Oregon)) | Weiser South | 1129769 |
| Coyote Gulch Siphon | Malheur | 2,461 ft (750 m) | 43°38′00″N 117°05′24″W﻿ / ﻿43.63333°N 117.09000°W﻿ / 43.63333; -117.09000﻿ (Coyote Gulch Siphon (Malheur County, Oregon)) | Adrian | 1131223 |
| Cram Ditch | Jefferson | 1,844 ft (562 m) | 44°47′58″N 120°55′53″W﻿ / ﻿44.79944°N 120.93139°W﻿ / 44.79944; -120.93139﻿ (Cram Ditch (Jefferson County, Oregon)) | Willowdale | 1119504 |
| Cranston Ditch | Baker | 2,700 ft (820 m) | 44°51′59″N 117°35′00″W﻿ / ﻿44.86639°N 117.58333°W﻿ / 44.86639; -117.58333﻿ (Cranston Ditch (Baker County, Oregon)) | Keating | 1158185 |
| Crater Canal | Jackson | 1,348 ft (411 m) | 42°28′59″N 122°47′49″W﻿ / ﻿42.48306°N 122.79694°W﻿ / 42.48306; -122.79694﻿ (Crater Canal (Jackson County, Oregon)) | Eagle Point | 1135368 |
| Crater Creek Ditch | Deschutes | 6,850 ft (2,090 m) | 44°02′50″N 121°40′25″W﻿ / ﻿44.04722°N 121.67361°W﻿ / 44.04722; -121.67361﻿ (Crater Creek Ditch (Deschutes County, Oregon)) | Broken Top | 1140395 |
| Cross Country Ditch | Wallowa | 3,323 ft (1,013 m) | 45°29′39″N 117°25′09″W﻿ / ﻿45.49417°N 117.41917°W﻿ / 45.49417; -117.41917﻿ (Cross Country Ditch (Wallowa County, Oregon)) | Lostine | 1140478 |
| Crump Ditch | Lake | 4,590 ft (1,400 m) | 42°11′00″N 119°53′29″W﻿ / ﻿42.18333°N 119.89139°W﻿ / 42.18333; -119.89139﻿ (Crump Ditch (Lake County, Oregon)) | Adel | 1131216 |
| Crutcher Ditch | Malheur | 3,796 ft (1,157 m) | 42°43′00″N 117°48′56″W﻿ / ﻿42.71667°N 117.81556°W﻿ / 42.71667; -117.81556﻿ (Crutcher Ditch (Malheur County, Oregon)) | Anderson Reservoir | 1130446 |
| Cummings Ditch | Grant | 2,477 ft (755 m) | 44°26′55″N 119°32′04″W﻿ / ﻿44.44861°N 119.53444°W﻿ / 44.44861; -119.53444﻿ (Cummings Ditch (Grant County, Oregon)) | Dayville | 1153770 |
| Curop Ditch | Baker | 3,970 ft (1,210 m) | 44°28′35″N 118°12′19″W﻿ / ﻿44.47639°N 118.20528°W﻿ / 44.47639; -118.20528﻿ (Curop Ditch (Baker County, Oregon)) | Unity | 1153981 |
| Curtis Ditch | Lake | 4,308 ft (1,313 m) | 42°30′45″N 120°18′24″W﻿ / ﻿42.51250°N 120.30667°W﻿ / 42.51250; -120.30667﻿ (Curtis Ditch (Lake County, Oregon)) | Coglan Buttes SE | 1131004 |
| D Canal | Klamath | 4,075 ft (1,242 m) | 42°02′00″N 121°26′51″W﻿ / ﻿42.03333°N 121.44750°W﻿ / 42.03333; -121.44750﻿ (D Canal (Klamath County, Oregon)) | Malin | 1119652 |
| Danforth Ditch | Harney | 4,462 ft (1,360 m) | 43°39′35″N 118°54′19″W﻿ / ﻿43.65972°N 118.90528°W﻿ / 43.65972; -118.90528﻿ (Danforth Ditch (Harney County, Oregon)) | Devine Ridge South | 1154187 |
| Danley Creek Canal | Jackson | 4,701 ft (1,433 m) | 42°17′54″N 122°21′24″W﻿ / ﻿42.29833°N 122.35667°W﻿ / 42.29833; -122.35667﻿ (Danley Creek Canal (Jackson County, Oregon)) | Brown Mountain | 1116642 |
| Day Drainage Ditch | Lincoln | 23 ft (7.0 m) | 44°26′59″N 124°02′12″W﻿ / ﻿44.44972°N 124.03667°W﻿ / 44.44972; -124.03667﻿ (Day Drainage Ditch (Lincoln County, Oregon)) | Waldport | 1135272 |
| Dead Ox Canal | Malheur | 2,123 ft (647 m) | 44°07′19″N 116°55′45″W﻿ / ﻿44.12194°N 116.92917°W﻿ / 44.12194; -116.92917﻿ (Dead Ox Canal (Malheur County, Oregon)) | Payette | 1119746 |
| Dee Flat Ditch | Hood River | 1,322 ft (403 m) | 45°33′37″N 121°40′08″W﻿ / ﻿45.56028°N 121.66889°W﻿ / 45.56028; -121.66889﻿ (Dee Flat Ditch (Hood River County, Oregon)) | Dee | 1140781 |
| Diamond Canal | Harney | 4,153 ft (1,266 m) | 43°02′14″N 118°44′25″W﻿ / ﻿43.03722°N 118.74028°W﻿ / 43.03722; -118.74028﻿ (Diamond Canal (Harney County, Oregon)) | Diamond | 1119921 |
| Diamond Drain | Harney | 4,144 ft (1,263 m) | 43°03′58″N 118°47′54″W﻿ / ﻿43.06611°N 118.79833°W﻿ / 43.06611; -118.79833﻿ (Diamond Drain (Harney County, Oregon)) | Diamond Swamp | 1119923 |
| Dillon Ditch | Umatilla | 561 ft (171 m) | 45°47′16″N 119°16′15″W﻿ / ﻿45.78778°N 119.27083°W﻿ / 45.78778; -119.27083﻿ (Dillon Ditch (Umatilla County, Oregon)) | Hermiston | 1119941 |
| Dobbin Ditch | Union | 2,785 ft (849 m) | 45°21′29″N 118°04′08″W﻿ / ﻿45.35806°N 118.06889°W﻿ / 45.35806; -118.06889﻿ (Dobbin Ditch (Union County, Oregon)) | La Grande | 1164089 |
| Domby Ditch | Malheur | 2,110 ft (640 m) | 44°16′00″N 117°06′19″W﻿ / ﻿44.26667°N 117.10528°W﻿ / 44.26667; -117.10528﻿ (Domby Ditch (Malheur County, Oregon)) | Porters Flat | 1158635 |
| Dork Canal | Malheur | 2,172 ft (662 m) | 44°01′00″N 117°02′17″W﻿ / ﻿44.01667°N 117.03806°W﻿ / 44.01667; -117.03806﻿ (Dork Canal (Malheur County, Oregon)) | Malheur Butte | 1158213 |
| Dorothy Ditch | Umatilla | 1,371 ft (418 m) | 45°53′44″N 118°18′24″W﻿ / ﻿45.89556°N 118.30667°W﻿ / 45.89556; -118.30667﻿ (Dorothy Ditch (Umatilla County, Oregon)) | Bowlus Hill | 1638732 |
| Drescher Ditch | Marion | 151 ft (46 m) | 45°07′04″N 122°45′29″W﻿ / ﻿45.11778°N 122.75806°W﻿ / 45.11778; -122.75806﻿ (Drescher Ditch (Marion County, Oregon)) | Silverton | 1130466 |
| Drewsey Reclamation Company Ditch | Harney | 3,576 ft (1,090 m) | 43°49′29″N 118°26′07″W﻿ / ﻿43.82472°N 118.43528°W﻿ / 43.82472; -118.43528﻿ (Drewsey Reclamation Company Ditch (Harney County, Oregon)) | Drewsey | 1120082 |
| Dry Gulch Ditch | Baker | 2,779 ft (847 m) | 44°48′49″N 117°12′41″W﻿ / ﻿44.81361°N 117.21139°W﻿ / 44.81361; -117.21139﻿ (Dry Gulch Ditch (Baker County, Oregon)) | Richland | 1141337 |
| Dufur Ditch | Wasco | 1,398 ft (426 m) | 45°26′32″N 121°09′05″W﻿ / ﻿45.44222°N 121.15139°W﻿ / 45.44222; -121.15139﻿ (Dufur Ditch (Wasco County, Oregon)) | Dufur West | 1130114 |
| Duncan Ditch | Baker | 2,762 ft (842 m) | 44°53′48″N 117°39′44″W﻿ / ﻿44.89667°N 117.66222°W﻿ / 44.89667; -117.66222﻿ (Duncan Ditch (Baker County, Oregon)) | Keating NW | 1120209 |
| Duncan Ditch | Malheur | 3,819 ft (1,164 m) | 44°18′50″N 117°57′14″W﻿ / ﻿44.31389°N 117.95389°W﻿ / 44.31389; -117.95389﻿ (Duncan Ditch (Malheur County, Oregon)) | Ironside | 1131939 |
| E Canal | Klamath | 4,121 ft (1,256 m) | 42°11′44″N 121°35′58″W﻿ / ﻿42.19556°N 121.59944°W﻿ / 42.19556; -121.59944﻿ (E Canal (Klamath County, Oregon)) | Dairy | 1120252 |
| Eagle Point Irrigation Canal | Jackson | 2,274 ft (693 m) | 42°33′42″N 122°39′28″W﻿ / ﻿42.56167°N 122.65778°W﻿ / 42.56167; -122.65778﻿ (Eagle Point Irrigation Canal (Jackson County, Oregon)) | Obenchain Mountain | 1141486 |
| East Canal | Klamath | 4,163 ft (1,269 m) | 42°12′00″N 121°19′39″W﻿ / ﻿42.20000°N 121.32750°W﻿ / 42.20000; -121.32750﻿ (East Canal (Klamath County, Oregon)) | Lorella | 1133076 |
| East Canal | Lake | 4,797 ft (1,462 m) | 42°06′40″N 120°31′32″W﻿ / ﻿42.11111°N 120.52556°W﻿ / 42.11111; -120.52556﻿ (East Canal (Lake County, Oregon)) | Fitzwater Point | 1141513 |
| East Fork Main Canal | Hood River | 1,657 ft (505 m) | 45°33′32″N 121°33′07″W﻿ / ﻿45.55889°N 121.55194°W﻿ / 45.55889; -121.55194﻿ (East Fork Main Canal (Hood River County, Oregon)) | Parkdale | 1141581 |
| East Grain Camp Canal | Harney | 4,147 ft (1,264 m) | 43°01′51″N 118°49′40″W﻿ / ﻿43.03083°N 118.82778°W﻿ / 43.03083; -118.82778﻿ (East Grain Camp Canal (Harney County, Oregon)) | Diamond Swamp | 1120334 |
| East Lateral | Jackson | 2,051 ft (625 m) | 42°15′18″N 122°44′33″W﻿ / ﻿42.25500°N 122.74250°W﻿ / 42.25500; -122.74250﻿ (East Lateral (Jackson County, Oregon)) | Rio Canyon | 1141625 |
| East Lateral | Klamath | 4,183 ft (1,275 m) | 42°06′25″N 121°12′31″W﻿ / ﻿42.10694°N 121.20861°W﻿ / 42.10694; -121.20861﻿ (East Lateral (Klamath County, Oregon)) | Langell Valley | 1158222 |
| East Malone Lateral | Klamath | 4,160 ft (1,270 m) | 42°01′07″N 121°13′08″W﻿ / ﻿42.01861°N 121.21889°W﻿ / 42.01861; -121.21889﻿ (East Malone Lateral (Klamath County, Oregon)) | Langell Valley | 1120342 |
| East Side Canal | Harney | 4,209 ft (1,283 m) | 42°49′29″N 118°51′43″W﻿ / ﻿42.82472°N 118.86194°W﻿ / 42.82472; -118.86194﻿ (East Side Canal (Harney County, Oregon)) | Page Springs | 1116729 |
| East Side Ditch | Malheur | 2,621 ft (799 m) | 44°15′12″N 117°30′23″W﻿ / ﻿44.25333°N 117.50639°W﻿ / 44.25333; -117.50639﻿ (East Side Ditch (Malheur County, Oregon)) | Becker Creek | 1133928 |
| Easterday Ditch | Malheur | 4,462 ft (1,360 m) | 43°30′45″N 118°00′19″W﻿ / ﻿43.51250°N 118.00528°W﻿ / 43.51250; -118.00528﻿ (Easterday Ditch (Malheur County, Oregon)) | Mosquito Mountain | 1129744 |
| Echave Ditch | Malheur | 4,895 ft (1,492 m) | 42°13′35″N 117°53′54″W﻿ / ﻿42.22639°N 117.89833°W﻿ / 42.22639; -117.89833﻿ (Echave Ditch (Malheur County, Oregon)) | Oregon Canyon Ranch | 1134242 |
| Eddington Ditch | Grant | 2,690 ft (820 m) | 44°25′40″N 119°15′19″W﻿ / ﻿44.42778°N 119.25528°W﻿ / 44.42778; -119.25528﻿ (Eddington Ditch (Grant County, Oregon)) | Shop Gulch | 1153717 |
| Elder Ditch | Klamath | 4,344 ft (1,324 m) | 42°27′10″N 121°06′44″W﻿ / ﻿42.45278°N 121.11222°W﻿ / 42.45278; -121.11222﻿ (Elder Ditch (Klamath County, Oregon)) | Bly | 1155311 |
| Eldorado Ditch | Baker | 5,082 ft (1,549 m) | 44°23′03″N 118°20′55″W﻿ / ﻿44.38417°N 118.34861°W﻿ / 44.38417; -118.34861﻿ (Eldorado Ditch (Baker County, Oregon)) | Rail Gulch | 1141723 |
| Elliot Ditch | Baker | 3,422 ft (1,043 m) | 44°29′44″N 117°47′00″W﻿ / ﻿44.49556°N 117.78333°W﻿ / 44.49556; -117.78333﻿ (Elliot Ditch (Baker County, Oregon)) | Wendt Butte | 1120483 |
| Ellis Ditch | Union | 3,392 ft (1,034 m) | 44°59′59″N 117°59′40″W﻿ / ﻿44.99972°N 117.99444°W﻿ / 44.99972; -117.99444﻿ (Ellis Ditch (Union County, Oregon)) | Haines | 1120486 |
| Elmer Ditch | Union | 3,583 ft (1,092 m) | 45°13′17″N 117°45′44″W﻿ / ﻿45.22139°N 117.76222°W﻿ / 45.22139; -117.76222﻿ (Elmer Ditch (Union County, Oregon)) | Union | 1158682 |
| Elms Ditch | Baker | 4,124 ft (1,257 m) | 44°25′53″N 118°13′42″W﻿ / ﻿44.43139°N 118.22833°W﻿ / 44.43139; -118.22833﻿ (Elms Ditch (Baker County, Oregon)) | Unity | 1141841 |
| Emele Ditch | Baker | 2,789 ft (850 m) | 44°54′37″N 117°39′05″W﻿ / ﻿44.91028°N 117.65139°W﻿ / 44.91028; -117.65139﻿ (Emele Ditch (Baker County, Oregon)) | Keating NW | 1120491 |
| Enterprise Ditch | Grant | 2,894 ft (882 m) | 44°24′52″N 119°04′13″W﻿ / ﻿44.41444°N 119.07028°W﻿ / 44.41444; -119.07028﻿ (Enterprise Ditch (Grant County, Oregon)) | Mount Vernon | 1152796 |
| Erickson Ditch | Wheeler | 4,314 ft (1,315 m) | 44°27′00″N 119°47′19″W﻿ / ﻿44.45000°N 119.78861°W﻿ / 44.45000; -119.78861﻿ (Erickson Ditch (Wheeler County, Oregon)) | Antone | 1158618 |
| Erwin Ditch | Baker | 2,756 ft (840 m) | 44°54′14″N 117°39′04″W﻿ / ﻿44.90389°N 117.65111°W﻿ / 44.90389; -117.65111﻿ (Erwin Ditch (Baker County, Oregon)) | Keating NW | 1158225 |
| Estes Ditch | Baker | 3,363 ft (1,025 m) | 44°50′13″N 117°51′37″W﻿ / ﻿44.83694°N 117.86028°W﻿ / 44.83694; -117.86028﻿ (Estes Ditch (Baker County, Oregon)) | Baker City | 1164091 |
| Eugene Water & Electric Board Canal | Lane | 735 ft (224 m) | 44°06′45″N 122°39′16″W﻿ / ﻿44.11250°N 122.65444°W﻿ / 44.11250; -122.65444﻿ (Eugene Water & Electric Board Canal (Lane County, Oregon)) | Leaburg | 1120531 |
| Evans Creek Lateral | Jackson | 1,132 ft (345 m) | 42°25′46″N 123°11′34″W﻿ / ﻿42.42944°N 123.19278°W﻿ / 42.42944; -123.19278﻿ (Evans Creek Lateral (Jackson County, Oregon)) | Rogue River | 1135238 |
| Ewing Ditch | Morrow | 584 ft (178 m) | 45°38′44″N 119°57′19″W﻿ / ﻿45.64556°N 119.95528°W﻿ / 45.64556; -119.95528﻿ (Ewing Ditch (Morrow County, Oregon)) | Dalreed Butte | 1129824 |
| F Canal | Klamath | 4,114 ft (1,254 m) | 42°07′50″N 121°31′16″W﻿ / ﻿42.13056°N 121.52111°W﻿ / 42.13056; -121.52111﻿ (F Canal (Klamath County, Oregon)) | Dairy | 1120549 |
| F-1 Lateral | Klamath | 4,859 ft (1,481 m) | 42°09′00″N 121°34′49″W﻿ / ﻿42.15000°N 121.58028°W﻿ / 42.15000; -121.58028﻿ (F-1 Lateral (Klamath County, Oregon)) | Dairy | 1132677 |
| Farmers Ditch | Baker | 4,111 ft (1,253 m) | 44°41′05″N 118°06′19″W﻿ / ﻿44.68472°N 118.10528°W﻿ / 44.68472; -118.10528﻿ (Farmers Ditch (Baker County, Oregon)) | Phillips Lake | 1120635 |
| Farmers Ditch | Malheur | 2,342 ft (714 m) | 43°56′50″N 117°21′15″W﻿ / ﻿43.94722°N 117.35417°W﻿ / 43.94722; -117.35417﻿ (Farmers Ditch (Malheur County, Oregon)) | Vale West | 1120636 |
| Farmers Ditch | Hood River | 850 ft (260 m) | 45°39′18″N 121°34′18″W﻿ / ﻿45.65500°N 121.57167°W﻿ / 45.65500; -121.57167﻿ (Farmers Ditch (Hood River County, Oregon)) | Hood River | 1142024 |
| Farmers Ditch | Wallowa | 4,213 ft (1,284 m) | 45°21′32″N 117°10′04″W﻿ / ﻿45.35889°N 117.16778°W﻿ / 45.35889; -117.16778﻿ (Farmers Ditch (Wallowa County, Oregon)) | Joseph | 1142025 |
| Feed Canal | Umatilla | 636 ft (194 m) | 45°49′30″N 119°16′12″W﻿ / ﻿45.82500°N 119.27000°W﻿ / 45.82500; -119.27000﻿ (Feed Canal (Umatilla County, Oregon)) | Hermiston | 1120657 |
| Feed Canal | Harney | 4,199 ft (1,280 m) | 43°08′00″N 118°37′59″W﻿ / ﻿43.13333°N 118.63306°W﻿ / 43.13333; -118.63306﻿ (Feed Canal (Harney County, Oregon)) | Barton Lake | 1129720 |
| Fish Creek Canal | Douglas | 3,035 ft (925 m) | 43°14′29″N 122°27′01″W﻿ / ﻿43.24139°N 122.45028°W﻿ / 43.24139; -122.45028﻿ (Fish Creek Canal (Douglas County, Oregon)) | Fish Creek Desert | 1134856 |
| Fister Ditch | Harney | 3,848 ft (1,173 m) | 43°20′45″N 118°25′39″W﻿ / ﻿43.34583°N 118.42750°W﻿ / 43.34583; -118.42750﻿ (Fister Ditch (Harney County, Oregon)) | Circle Bar | 1131825 |
| Fitzgerald Ditches | Lake | 5,321 ft (1,622 m) | 42°29′10″N 120°04′29″W﻿ / ﻿42.48611°N 120.07472°W﻿ / 42.48611; -120.07472﻿ (Fitzgerald Ditches (Lake County, Oregon)) | Drake Peak NE | 1131107 |
| Five and Seventenths Canal | Owyhee (ID) | 2,477 ft (755 m) | 43°38′19″N 117°02′34″W﻿ / ﻿43.63861°N 117.04278°W﻿ / 43.63861; -117.04278﻿ (Five and Seventenths Canal (Owyhee County, Idaho)) | Adrian | 372712 |
| Five and Seventenths Canal | Malheur | 2,526 ft (770 m) | 43°37′19″N 117°04′03″W﻿ / ﻿43.62194°N 117.06750°W﻿ / 43.62194; -117.06750﻿ (Five and Seventenths Canal (Malheur County, Oregon)) | Graveyard Point | 1120798 |
| Foothill Ditch | Baker | 2,858 ft (871 m) | 44°53′10″N 117°08′54″W﻿ / ﻿44.88611°N 117.14833°W﻿ / 44.88611; -117.14833﻿ (Foothill Ditch (Baker County, Oregon)) | Jimtown | 1153068 |
| Ford Ingram Ditch | Baker | 5,403 ft (1,647 m) | 44°53′40″N 118°05′47″W﻿ / ﻿44.89444°N 118.09639°W﻿ / 44.89444; -118.09639﻿ (Ford Ingram Ditch (Baker County, Oregon)) | Rock Creek | 1120877 |
| Fort Creek Ditch | Klamath | 4,147 ft (1,264 m) | 42°38′39″N 121°57′14″W﻿ / ﻿42.64417°N 121.95389°W﻿ / 42.64417; -121.95389﻿ (Fort Creek Ditch (Klamath County, Oregon)) | Fort Klamath | 1154978 |
| Fourmile Canal | Klamath | 4,147 ft (1,264 m) | 42°36′29″N 122°03′18″W﻿ / ﻿42.60806°N 122.05500°W﻿ / 42.60806; -122.05500﻿ (Fourmile Canal (Klamath County, Oregon)) | Crystal Spring | 1167675 |
| Frazier Creek Ditch | Benton | 213 ft (65 m) | 44°37′16″N 123°13′11″W﻿ / ﻿44.62111°N 123.21972°W﻿ / 44.62111; -123.21972﻿ (Frazier Creek Ditch (Benton County, Oregon)) | Riverside | 1120962 |
| Frederick Lateral | Jackson | 2,146 ft (654 m) | 42°13′22″N 122°46′57″W﻿ / ﻿42.22278°N 122.78250°W﻿ / 42.22278; -122.78250﻿ (Frederick Lateral (Jackson County, Oregon)) | Talent | 1142435 |
| Frog Creek Ditch | Wasco | 3,422 ft (1,043 m) | 45°10′06″N 121°38′29″W﻿ / ﻿45.16833°N 121.64139°W﻿ / 45.16833; -121.64139﻿ (Frog Creek Ditch (Wasco County, Oregon)) | Wapinitia Pass | 1121006 |
| Furnish Ditch | Umatilla | 682 ft (208 m) | 45°46′37″N 119°10′54″W﻿ / ﻿45.77694°N 119.18167°W﻿ / 45.77694; -119.18167﻿ (Furnish Ditch (Umatilla County, Oregon)) | Stanfield | 1158253 |
| G Canal | Klamath | 4,091 ft (1,247 m) | 42°05′54″N 121°40′05″W﻿ / ﻿42.09833°N 121.66806°W﻿ / 42.09833; -121.66806﻿ (G Canal (Klamath County, Oregon)) | Lost River | 1121027 |
| G-Three Canal | Klamath | 4,085 ft (1,245 m) | 42°02′20″N 121°33′26″W﻿ / ﻿42.03889°N 121.55722°W﻿ / 42.03889; -121.55722﻿ (G-Three Canal (Klamath County, Oregon)) | Merrill | 1121029 |
| Gardner Mill Race Ditch | Baker | 3,573 ft (1,089 m) | 44°59′39″N 118°03′04″W﻿ / ﻿44.99417°N 118.05111°W﻿ / 44.99417; -118.05111﻿ (Gardner Mill Race Ditch (Baker County, Oregon)) | Rock Creek | 1121061 |
| Gekeler Ditch | Union | 2,717 ft (828 m) | 45°19′13″N 118°01′33″W﻿ / ﻿45.32028°N 118.02583°W﻿ / 45.32028; -118.02583﻿ (Gekeler Ditch (Union County, Oregon)) | La Grande | 1164094 |
| Gellerman Canal | Malheur | 2,277 ft (694 m) | 44°00′57″N 117°15′23″W﻿ / ﻿44.01583°N 117.25639°W﻿ / 44.01583; -117.25639﻿ (Gellerman Canal (Malheur County, Oregon)) | Willowcreek | 1166655 |
| Gerwick Ditch | Klamath | 4,518 ft (1,377 m) | 42°45′49″N 121°48′14″W﻿ / ﻿42.76361°N 121.80389°W﻿ / 42.76361; -121.80389﻿ (Gerwick Ditch (Klamath County, Oregon)) | Fuego | 1154990 |
| Gibson Drain | Malheur | 2,244 ft (684 m) | 43°41′23″N 117°04′53″W﻿ / ﻿43.68972°N 117.08139°W﻿ / 43.68972; -117.08139﻿ (Gibson Drain (Malheur County, Oregon)) | Adrian | 1121122 |
| Gill Ditch | Crook | 4,554 ft (1,388 m) | 44°22′04″N 120°11′26″W﻿ / ﻿44.36778°N 120.19056°W﻿ / 44.36778; -120.19056﻿ (Gill Ditch (Crook County, Oregon)) | Williams Prairie | 1157544 |
| Glacier Ditch | Hood River | 2,674 ft (815 m) | 45°27′59″N 121°35′36″W﻿ / ﻿45.46639°N 121.59333°W﻿ / 45.46639; -121.59333﻿ (Glacier Ditch (Hood River County, Oregon)) | Dog River | 1153202 |
| Gold Hill Irrigation District Canal | Jackson | 1,066 ft (325 m) | 42°25′34″N 123°06′19″W﻿ / ﻿42.42611°N 123.10528°W﻿ / 42.42611; -123.10528﻿ (Gold Hill Irrigation District Canal (Jackson County, Oregon)) | Gold Hill | 1135237 |
| Golden Gate Canal | Malheur | 2,329 ft (710 m) | 43°42′51″N 117°01′52″W﻿ / ﻿43.71417°N 117.03111°W﻿ / 43.71417; -117.03111﻿ (Golden Gate Canal (Malheur County, Oregon)) | Adrian | 1121220 |
| Goulden Canal | Harney | 4,108 ft (1,252 m) | 43°15′33″N 119°14′54″W﻿ / ﻿43.25917°N 119.24833°W﻿ / 43.25917; -119.24833﻿ (Goulden Canal (Harney County, Oregon)) | Northwest Harney Lake | 1133761 |
| Grande Ronde Ditch | Union | 2,717 ft (828 m) | 45°18′14″N 118°01′40″W﻿ / ﻿45.30389°N 118.02778°W﻿ / 45.30389; -118.02778﻿ (Grande Ronde Ditch (Union County, Oregon)) | La Grande | 1164096 |
| Granger Ditch | Wallowa | 3,963 ft (1,208 m) | 45°23′13″N 117°14′11″W﻿ / ﻿45.38694°N 117.23639°W﻿ / 45.38694; -117.23639﻿ (Granger Ditch (Wallowa County, Oregon)) | Joseph NW | 1142910 |
| Gray Lateral | Lake | 4,770 ft (1,450 m) | 42°10′42″N 120°26′04″W﻿ / ﻿42.17833°N 120.43444°W﻿ / 42.17833; -120.43444﻿ (Gray Lateral (Lake County, Oregon)) | Lakeview Airport | 1153749 |
| Greener Ditch | Baker | 6,345 ft (1,934 m) | 45°02′17″N 117°03′40″W﻿ / ﻿45.03806°N 117.06111°W﻿ / 45.03806; -117.06111﻿ (Greener Ditch (Baker County, Oregon)) | Deadman Point | 1133854 |
| Grout Ditch | Union | 3,461 ft (1,055 m) | 45°08′27″N 117°58′46″W﻿ / ﻿45.14083°N 117.97944°W﻿ / 45.14083; -117.97944﻿ (Grout Ditch (Union County, Oregon)) | Craig Mountain | 1130906 |
| H V I Company Ditch | Harney | 4,144 ft (1,263 m) | 43°37′40″N 118°44′56″W﻿ / ﻿43.62778°N 118.74889°W﻿ / 43.62778; -118.74889﻿ (H V I Company Ditch (Harney County, Oregon)) | Buchanan | 1154186 |
| Hall Ditch | Wheeler | 3,428 ft (1,045 m) | 44°32′19″N 120°08′39″W﻿ / ﻿44.53861°N 120.14417°W﻿ / 44.53861; -120.14417﻿ (Hall Ditch (Wheeler County, Oregon)) | Mitchell | 1157460 |
| Halliday Drain | Malheur | 2,182 ft (665 m) | 44°00′55″N 117°01′14″W﻿ / ﻿44.01528°N 117.02056°W﻿ / 44.01528; -117.02056﻿ (Halliday Drain (Malheur County, Oregon)) | Malheur Butte | 1131830 |
| Hammel Lateral | Jackson | 1,614 ft (492 m) | 42°32′59″N 122°46′23″W﻿ / ﻿42.54972°N 122.77306°W﻿ / 42.54972; -122.77306﻿ (Hammel Lateral (Jackson County, Oregon)) | Shady Cove | 1121541 |
| Hanley North Canal | Jackson | 2,116 ft (645 m) | 42°25′26″N 122°33′27″W﻿ / ﻿42.42389°N 122.55750°W﻿ / 42.42389; -122.55750﻿ (Hanley North Canal (Jackson County, Oregon)) | Lakecreek | 1116588 |
| Hanley South Canal | Jackson | 2,090 ft (640 m) | 42°24′31″N 122°34′11″W﻿ / ﻿42.40861°N 122.56972°W﻿ / 42.40861; -122.56972﻿ (Hanley South Canal (Jackson County, Oregon)) | Lakecreek | 1116589 |
| Happy Valley Ditch | Malheur | 3,383 ft (1,031 m) | 42°50′32″N 117°37′54″W﻿ / ﻿42.84222°N 117.63167°W﻿ / 42.84222; -117.63167﻿ (Happy Valley Ditch (Malheur County, Oregon)) | Rome | 1143295 |
| Harper Southside Canal | Malheur | 2,507 ft (764 m) | 43°51′35″N 117°35′44″W﻿ / ﻿43.85972°N 117.59556°W﻿ / 43.85972; -117.59556﻿ (Harper Southside Canal (Malheur County, Oregon)) | Harper | 1131817 |
| Hawley Ditch | Baker | 4,245 ft (1,294 m) | 44°43′01″N 118°09′00″W﻿ / ﻿44.71694°N 118.15000°W﻿ / 44.71694; -118.15000﻿ (Hawley Ditch (Baker County, Oregon)) | Sumpter | 1143386 |
| Hendrix Siphon | Malheur | 2,444 ft (745 m) | 44°00′48″N 117°23′49″W﻿ / ﻿44.01333°N 117.39694°W﻿ / 44.01333; -117.39694﻿ (Hendrix Siphon (Malheur County, Oregon)) | Hope Butte | 1121756 |
| Hereford Ditch | Baker | 3,665 ft (1,117 m) | 44°30′12″N 118°03′34″W﻿ / ﻿44.50333°N 118.05944°W﻿ / 44.50333; -118.05944﻿ (Hereford Ditch (Baker County, Oregon)) | Beaverdam Creek | 1131456 |
| Hermiston Ditch | Umatilla | 443 ft (135 m) | 45°51′01″N 119°16′35″W﻿ / ﻿45.85028°N 119.27639°W﻿ / 45.85028; -119.27639﻿ (Hermiston Ditch (Umatilla County, Oregon)) | Hermiston | 1121772 |
| High Line Canal | Klamath | 4,117 ft (1,255 m) | 42°02′14″N 121°23′47″W﻿ / ﻿42.03722°N 121.39639°W﻿ / 42.03722; -121.39639﻿ (High Line Canal (Klamath County, Oregon)) | Malin | 1121804 |
| High Line Canal | Umatilla | 620 ft (190 m) | 45°46′33″N 119°22′20″W﻿ / ﻿45.77583°N 119.37222°W﻿ / 45.77583; -119.37222﻿ (High Line Canal (Umatilla County, Oregon)) | Hermiston | 1121805 |
| High Line Ditch | Klamath | 4,219 ft (1,286 m) | 42°07′49″N 121°19′55″W﻿ / ﻿42.13028°N 121.33194°W﻿ / 42.13028; -121.33194﻿ (High Line Ditch (Klamath County, Oregon)) | Lorella | 1121806 |
| High Line Ditch | Malheur | 2,861 ft (872 m) | 44°13′27″N 117°32′01″W﻿ / ﻿44.22417°N 117.53361°W﻿ / 44.22417; -117.53361﻿ (High Line Ditch (Malheur County, Oregon)) | Brogan | 1121807 |
| High Line Ditch | Lake | 4,833 ft (1,473 m) | 42°25′40″N 120°15′19″W﻿ / ﻿42.42778°N 120.25528°W﻿ / 42.42778; -120.25528﻿ (High Line Ditch (Lake County, Oregon)) | Valley Falls | 1131007 |
| High Line Ditch | Baker | 3,747 ft (1,142 m) | 44°30′00″N 118°08′22″W﻿ / ﻿44.50000°N 118.13944°W﻿ / 44.50000; -118.13944﻿ (High Line Ditch (Baker County, Oregon)) | Unity Reservoir | 1153983 |
| Highberger Ditch | Marion | 364 ft (111 m) | 44°50′24″N 122°51′59″W﻿ / ﻿44.84000°N 122.86639°W﻿ / 44.84000; -122.86639﻿ (Highberger Ditch (Marion County, Oregon)) | Stayton | 1130397 |
| Highland Ditch | Wasco | 2,028 ft (618 m) | 45°15′11″N 121°19′13″W﻿ / ﻿45.25306°N 121.32028°W﻿ / 45.25306; -121.32028﻿ (Highland Ditch (Wasco County, Oregon)) | Friend | 1143587 |
| Highline Canal | Josephine | 1,030 ft (310 m) | 42°25′27″N 123°16′58″W﻿ / ﻿42.42417°N 123.28278°W﻿ / 42.42417; -123.28278﻿ (Highline Canal (Josephine County, Oregon)) | Grants Pass | 1143590 |
| Highline Ditch | Wasco | 1,161 ft (354 m) | 45°15′17″N 121°08′46″W﻿ / ﻿45.25472°N 121.14611°W﻿ / 45.25472; -121.14611﻿ (Highline Ditch (Wasco County, Oregon)) | Postage Stamp Butte | 1121825 |
| Highline Ditch | Harney | 4,213 ft (1,284 m) | 43°07′20″N 118°40′39″W﻿ / ﻿43.12222°N 118.67750°W﻿ / 43.12222; -118.67750﻿ (Highline Ditch (Harney County, Oregon)) | Diamond | 1129719 |
| Highline Lateral | Hood River | 1,093 ft (333 m) | 45°37′06″N 121°33′45″W﻿ / ﻿45.61833°N 121.56250°W﻿ / 45.61833; -121.56250﻿ (Highline Lateral (Hood River County, Oregon)) | Parkdale | 1136971 |
| Hobbs Ditch | Klamath | 4,511 ft (1,375 m) | 42°45′44″N 121°49′44″W﻿ / ﻿42.76222°N 121.82889°W﻿ / 42.76222; -121.82889﻿ (Hobbs Ditch (Klamath County, Oregon)) | Fuego | 1154989 |
| Hoffman Ditch | Crook | 2,976 ft (907 m) | 44°10′29″N 120°50′44″W﻿ / ﻿44.17472°N 120.84556°W﻿ / 44.17472; -120.84556﻿ (Hoffman Ditch (Crook County, Oregon)) | Stearns Butte | 1130935 |
| Holloway Ditch | Harney | 4,770 ft (1,450 m) | 42°05′55″N 118°26′57″W﻿ / ﻿42.09861°N 118.44917°W﻿ / 42.09861; -118.44917﻿ (Holloway Ditch (Harney County, Oregon)) | Windy Point | 1157740 |
| Holly Drain | Malheur | 2,244 ft (684 m) | 43°42′09″N 117°04′02″W﻿ / ﻿43.70250°N 117.06722°W﻿ / 43.70250; -117.06722﻿ (Holly Drain (Malheur County, Oregon)) | Adrian | 1121922 |
| Hope Ditch | Malheur | 2,244 ft (684 m) | 44°00′25″N 117°13′57″W﻿ / ﻿44.00694°N 117.23250°W﻿ / 44.00694; -117.23250﻿ (Hope Ditch (Malheur County, Oregon)) | Henry Gulch | 1133398 |
| Hope Drain | Malheur | 2,234 ft (681 m) | 43°59′58″N 117°12′22″W﻿ / ﻿43.99944°N 117.20611°W﻿ / 43.99944; -117.20611﻿ (Hope Drain (Malheur County, Oregon)) | Vale East | 1121975 |
| Hopkins Canal | Jackson | 1,332 ft (406 m) | 42°20′49″N 122°54′09″W﻿ / ﻿42.34694°N 122.90250°W﻿ / 42.34694; -122.90250﻿ (Hopkins Canal (Jackson County, Oregon)) | Medford West | 1121978 |
| Hotchkiss Ditch | Lake | 4,823 ft (1,470 m) | 42°17′00″N 120°24′09″W﻿ / ﻿42.28333°N 120.40250°W﻿ / 42.28333; -120.40250﻿ (Hotchkiss Ditch (Lake County, Oregon)) | Big Baldy | 1158693 |
| Howard Prairie Canal | Jackson | 4,521 ft (1,378 m) | 42°09′14″N 122°22′29″W﻿ / ﻿42.15389°N 122.37472°W﻿ / 42.15389; -122.37472﻿ (Howard Prairie Canal (Jackson County, Oregon)) | Little Chinquapin Mountain | 1160748 |
| Howell Ditch | Baker | 2,254 ft (687 m) | 44°46′15″N 117°11′34″W﻿ / ﻿44.77083°N 117.19278°W﻿ / 44.77083; -117.19278﻿ (Howell Ditch (Baker County, Oregon)) | Richland | 1158582 |
| Hubble Ditch | Malheur | 3,471 ft (1,058 m) | 42°51′21″N 117°43′35″W﻿ / ﻿42.85583°N 117.72639°W﻿ / 42.85583; -117.72639﻿ (Hubble Ditch (Malheur County, Oregon)) | Rome | 1122095 |
| Hudson Bay Canal | Umatilla | 820 ft (250 m) | 45°58′22″N 118°26′40″W﻿ / ﻿45.97278°N 118.44444°W﻿ / 45.97278; -118.44444﻿ (Hudson Bay Canal (Umatilla County, Oregon)) | Milton-Freewater | 1122102 |
| Huff Ditch | Baker | 5,361 ft (1,634 m) | 45°01′00″N 117°01′11″W﻿ / ﻿45.01667°N 117.01972°W﻿ / 45.01667; -117.01972﻿ (Huff Ditch (Baker County, Oregon)) | Deadman Point | 1133859 |
| Hunt Ditch | Umatilla | 630 ft (190 m) | 45°44′26″N 119°16′37″W﻿ / ﻿45.74056°N 119.27694°W﻿ / 45.74056; -119.27694﻿ (Hunt Ditch (Umatilla County, Oregon)) | Service Buttes | 1122141 |
| Hunter Ditch | Malheur | 4,229 ft (1,289 m) | 44°01′31″N 118°06′57″W﻿ / ﻿44.02528°N 118.11583°W﻿ / 44.02528; -118.11583﻿ (Hunter Ditch (Malheur County, Oregon)) | Hunter Mountain | 1637912 |
| Hurricane Ditch | Wallowa | 4,144 ft (1,263 m) | 45°21′50″N 117°16′36″W﻿ / ﻿45.36389°N 117.27667°W﻿ / 45.36389; -117.27667﻿ (Hurricane Ditch (Wallowa County, Oregon)) | Chief Joseph Mountain | 1143960 |
| Hutchinson Ditch | Baker | 3,691 ft (1,125 m) | 44°59′08″N 118°02′56″W﻿ / ﻿44.98556°N 118.04889°W﻿ / 44.98556; -118.04889﻿ (Hutchinson Ditch (Baker County, Oregon)) | Rock Creek | 1122173 |
| I Canal | Umatilla | 499 ft (152 m) | 45°49′59″N 119°18′59″W﻿ / ﻿45.83306°N 119.31639°W﻿ / 45.83306; -119.31639﻿ (I Canal (Umatilla County, Oregon)) | Hermiston | 1129829 |
| I N Young Ditch | Baker | 2,290 ft (700 m) | 44°47′20″N 117°11′04″W﻿ / ﻿44.78889°N 117.18444°W﻿ / 44.78889; -117.18444﻿ (I N Young Ditch (Baker County, Oregon)) | Richland | 1158580 |
| Imbler Drain | Malheur | 2,224 ft (678 m) | 43°43′56″N 117°01′50″W﻿ / ﻿43.73222°N 117.03056°W﻿ / 43.73222; -117.03056﻿ (Imbler Drain (Malheur County, Oregon)) | Adrian | 1122190 |
| Independence Creek Ditch | Baker | 3,914 ft (1,193 m) | 44°29′15″N 117°57′49″W﻿ / ﻿44.48750°N 117.96361°W﻿ / 44.48750; -117.96361﻿ (Independence Creek Ditch (Baker County, Oregon)) | Devils Heel | 1131954 |
| Island Ditch | Wallowa | 3,875 ft (1,181 m) | 45°23′55″N 117°15′32″W﻿ / ﻿45.39861°N 117.25889°W﻿ / 45.39861; -117.25889﻿ (Island Ditch (Wallowa County, Oregon)) | Enterprise | 1144133 |
| J Canal | Klamath | 4,045 ft (1,233 m) | 42°00′15″N 121°27′21″W﻿ / ﻿42.00417°N 121.45583°W﻿ / 42.00417; -121.45583﻿ (J Canal (Klamath County, Oregon)) | Malin | 1122308 |
| J-1 Canal | Klamath | 4,052 ft (1,235 m) | 42°00′13″N 121°32′31″W﻿ / ﻿42.00361°N 121.54194°W﻿ / 42.00361; -121.54194﻿ (J-1 Canal (Klamath County, Oregon)) | Merrill | 1122314 |
| J-H Canal | Malheur | 2,323 ft (708 m) | 43°54′15″N 117°18′08″W﻿ / ﻿43.90417°N 117.30222°W﻿ / 43.90417; -117.30222﻿ (J-H Canal (Malheur County, Oregon)) | Vale West | 1122313 |
| Jacobsen Ditch | Baker | 3,268 ft (996 m) | 44°58′12″N 117°52′49″W﻿ / ﻿44.97000°N 117.88028°W﻿ / 44.97000; -117.88028﻿ (Jacobsen Ditch (Baker County, Oregon)) | Haines | 1122369 |
| Jefferson Ditch | Marion | 256 ft (78 m) | 44°42′38″N 122°59′21″W﻿ / ﻿44.71056°N 122.98917°W﻿ / 44.71056; -122.98917﻿ (Jefferson Ditch (Marion County, Oregon)) | Crabtree | 1156648 |
| Jerome Prairie Lateral | Josephine | 1,050 ft (320 m) | 42°23′16″N 123°24′24″W﻿ / ﻿42.38778°N 123.40667°W﻿ / 42.38778; -123.40667﻿ (Jerome Prairie Lateral (Josephine County, Oregon)) | Wilderville | 1135423 |
| Johnson Ditch | Harney | 3,842 ft (1,171 m) | 43°54′25″N 118°34′24″W﻿ / ﻿43.90694°N 118.57333°W﻿ / 43.90694; -118.57333﻿ (Johnson Ditch (Harney County, Oregon)) | Moffit Table | 1163977 |
| Jones Canal | Lake | 4,311 ft (1,314 m) | 42°39′51″N 120°30′40″W﻿ / ﻿42.66417°N 120.51111°W﻿ / 42.66417; -120.51111﻿ (Jones Canal (Lake County, Oregon)) | Paisley | 1144373 |
| Jones Ditch | Marion | 157 ft (48 m) | 45°03′09″N 122°55′27″W﻿ / ﻿45.05250°N 122.92417°W﻿ / 45.05250; -122.92417﻿ (Jones Ditch (Marion County, Oregon)) | Gervais | 1122511 |
| Jonesboro Canal | Malheur | 2,821 ft (860 m) | 43°47′45″N 117°56′04″W﻿ / ﻿43.79583°N 117.93444°W﻿ / 43.79583; -117.93444﻿ (Jonesboro Canal (Malheur County, Oregon)) | Jonesboro | 1131800 |
| Jordan Drain | Malheur | 2,195 ft (669 m) | 43°59′47″N 117°05′56″W﻿ / ﻿43.99639°N 117.09889°W﻿ / 43.99639; -117.09889﻿ (Jordan Drain (Malheur County, Oregon)) | Cairo | 1122530 |
| Juntura Investment Company Canal | Malheur | 3,081 ft (939 m) | 43°45′45″N 118°07′04″W﻿ / ﻿43.76250°N 118.11778°W﻿ / 43.76250; -118.11778﻿ (Juntura Investment Company Canal (Malheur County, Oregon)) | Stemler Ridge | 1131763 |
| Kanehinke Ditch | Malheur | 3,881 ft (1,183 m) | 42°40′51″N 117°53′41″W﻿ / ﻿42.68083°N 117.89472°W﻿ / 42.68083; -117.89472﻿ (Kanehinke Ditch (Malheur County, Oregon)) | Flat Top Mountain | 1130449 |
| Kelly Lateral | Wasco | 2,064 ft (629 m) | 45°07′23″N 121°15′01″W﻿ / ﻿45.12306°N 121.25028°W﻿ / 45.12306; -121.25028﻿ (Kelly Lateral (Wasco County, Oregon)) | Maupin SW | 1153132 |
| Kelsey Wilson Ditch | Baker | 3,383 ft (1,031 m) | 44°59′00″N 117°56′10″W﻿ / ﻿44.98333°N 117.93611°W﻿ / 44.98333; -117.93611﻿ (Kelsey Wilson Ditch (Baker County, Oregon)) | Haines | 1122679 |
| Kennedy Ditch | Baker | 3,169 ft (966 m) | 44°59′15″N 117°38′49″W﻿ / ﻿44.98750°N 117.64694°W﻿ / 44.98750; -117.64694﻿ (Kennedy Ditch (Baker County, Oregon)) | Keating NW | 1122683 |
| Keno Canal | Klamath | 4,127 ft (1,258 m) | 42°13′37″N 121°47′52″W﻿ / ﻿42.22694°N 121.79778°W﻿ / 42.22694; -121.79778﻿ (Keno Canal (Klamath County, Oregon)) | Klamath Falls | 1135524 |
| Kerby Ditch | Josephine | 1,276 ft (389 m) | 42°10′33″N 123°39′31″W﻿ / ﻿42.17583°N 123.65861°W﻿ / 42.17583; -123.65861﻿ (Kerby Ditch (Josephine County, Oregon)) | Cave Junction | 1144565 |
| King Drain | Malheur | 2,218 ft (676 m) | 43°59′08″N 117°09′25″W﻿ / ﻿43.98556°N 117.15694°W﻿ / 43.98556; -117.15694﻿ (King Drain (Malheur County, Oregon)) | Vale East | 1122749 |
| Kingman Drain | Malheur | 2,215 ft (675 m) | 43°45′58″N 117°03′33″W﻿ / ﻿43.76611°N 117.05917°W﻿ / 43.76611; -117.05917﻿ (Kingman Drain (Malheur County, Oregon)) | Owyhee | 1122759 |
| Kingman Lateral | Malheur | 2,526 ft (770 m) | 43°43′51″N 117°08′42″W﻿ / ﻿43.73083°N 117.14500°W﻿ / 43.73083; -117.14500﻿ (Kingman Lateral (Malheur County, Oregon)) | Owyhee Dam | 1122760 |
| Kittredge Canal | Klamath | 4,524 ft (1,379 m) | 42°56′59″N 121°36′59″W﻿ / ﻿42.94972°N 121.61639°W﻿ / 42.94972; -121.61639﻿ (Kittredge Canal (Klamath County, Oregon)) | Wildhorse Ridge | 1155000 |
| Klamath Strait | Klamath | 4,098 ft (1,249 m) | 42°04′43″N 121°49′49″W﻿ / ﻿42.07861°N 121.83028°W﻿ / 42.07861; -121.83028﻿ (Klamath Strait (Klamath County, Oregon)) | Worden | 1161407 |
| Klamath Strait Drain | Klamath | 4,091 ft (1,247 m) | 42°01′57″N 121°47′25″W﻿ / ﻿42.03250°N 121.79028°W﻿ / 42.03250; -121.79028﻿ (Klamath Strait Drain (Klamath County, Oregon)) | Worden | 226642 |
| Krumbo Canal | Harney | 4,160 ft (1,270 m) | 42°58′46″N 118°51′03″W﻿ / ﻿42.97944°N 118.85083°W﻿ / 42.97944; -118.85083﻿ (Krumbo Canal (Harney County, Oregon)) | Krumbo Reservoir | 1122846 |
| Kueny Ditch | Harney | 4,098 ft (1,249 m) | 42°27′01″N 118°36′40″W﻿ / ﻿42.45028°N 118.61111°W﻿ / 42.45028; -118.61111﻿ (Kueny Ditch (Harney County, Oregon)) | Andrews | 1122856 |
| L Canal | Umatilla | 492 ft (150 m) | 45°51′49″N 119°12′34″W﻿ / ﻿45.86361°N 119.20944°W﻿ / 45.86361; -119.20944﻿ (L Canal (Umatilla County, Oregon)) | Stanfield | 1129796 |
| La Grande Aqueduct | Union | 4,383 ft (1,336 m) | 45°13′44″N 118°10′09″W﻿ / ﻿45.22889°N 118.16917°W﻿ / 45.22889; -118.16917﻿ (La Grande Aqueduct (Union County, Oregon)) | La Grande Reservoir | 1130988 |
| Lacomb Irrigation Canal | Linn | 915 ft (279 m) | 44°35′29″N 122°39′34″W﻿ / ﻿44.59139°N 122.65944°W﻿ / 44.59139; -122.65944﻿ (Lacomb Irrigation Canal (Linn County, Oregon)) | Lacomb | 1122882 |
| Ladd Creek Pickup Ditch | Union | 2,697 ft (822 m) | 45°15′37″N 117°57′56″W﻿ / ﻿45.26028°N 117.96556°W﻿ / 45.26028; -117.96556﻿ (Ladd Creek Pickup Ditch (Union County, Oregon)) | Conley | 1122886 |
| Lake Labish Ditch | Marion | 138 ft (42 m) | 45°01′57″N 122°55′54″W﻿ / ﻿45.03250°N 122.93167°W﻿ / 45.03250; -122.93167﻿ (Lake Labish Ditch (Marion County, Oregon)) | Gervais | 1157945 |
| Lateral 197 | Malheur | 2,395 ft (730 m) | 43°59′12″N 117°21′40″W﻿ / ﻿43.98667°N 117.36111°W﻿ / 43.98667; -117.36111﻿ (Lateral 197 (Malheur County, Oregon)) | Vale West | 1166670 |
| Lateral B | Deschutes | 3,081 ft (939 m) | 44°14′18″N 121°13′18″W﻿ / ﻿44.23833°N 121.22167°W﻿ / 44.23833; -121.22167﻿ (Lateral B (Deschutes County, Oregon)) | Forked Horn Butte | 1144853 |
| Lateral C | Deschutes | 3,005 ft (916 m) | 44°16′26″N 121°11′59″W﻿ / ﻿44.27389°N 121.19972°W﻿ / 44.27389; -121.19972﻿ (Lateral C (Deschutes County, Oregon)) | Redmond | 1122971 |
| Lateral E | Deschutes | 3,008 ft (917 m) | 44°17′24″N 121°09′24″W﻿ / ﻿44.29000°N 121.15667°W﻿ / 44.29000; -121.15667﻿ (Lateral E (Deschutes County, Oregon)) | Redmond | 1129581 |
| Lateral F | Deschutes | 2,802 ft (854 m) | 44°20′20″N 121°11′32″W﻿ / ﻿44.33889°N 121.19222°W﻿ / 44.33889; -121.19222﻿ (Lateral F (Deschutes County, Oregon)) | Redmond | 1122972 |
| Lateral H | Deschutes | 2,861 ft (872 m) | 44°21′46″N 121°10′30″W﻿ / ﻿44.36278°N 121.17500°W﻿ / 44.36278; -121.17500﻿ (Lateral H (Deschutes County, Oregon)) | Redmond | 1144854 |
| Lateral J | Deschutes | 2,746 ft (837 m) | 44°20′59″N 121°14′59″W﻿ / ﻿44.34972°N 121.24972°W﻿ / 44.34972; -121.24972﻿ (Lateral J (Deschutes County, Oregon)) | Redmond | 1129579 |
| Laycock Long Ditch | Grant | 3,005 ft (916 m) | 44°25′24″N 119°01′32″W﻿ / ﻿44.42333°N 119.02556°W﻿ / 44.42333; -119.02556﻿ (Laycock Long Ditch (Grant County, Oregon)) | Mount Vernon | 1152795 |
| Lebanon Santiam Canal | Linn | 364 ft (111 m) | 44°30′45″N 122°52′42″W﻿ / ﻿44.51250°N 122.87833°W﻿ / 44.51250; -122.87833﻿ (Lebanon Santiam Canal (Linn County, Oregon)) | Lebanon | 1123016 |
| Lemolo Canal Number 1 | Douglas | 4,140 ft (1,260 m) | 43°20′19″N 122°12′49″W﻿ / ﻿43.33861°N 122.21361°W﻿ / 43.33861; -122.21361﻿ (Lemolo Canal Number 1 (Douglas County, Oregon)) | Lemolo Lake | 1134866 |
| Lemolo Number 2 Canal | Douglas | 3,278 ft (999 m) | 43°19′24″N 122°20′24″W﻿ / ﻿43.32333°N 122.34000°W﻿ / 43.32333; -122.34000﻿ (Lemolo Number 2 Canal (Douglas County, Oregon)) | Potter Mountain | 1155264 |
| Lemons Ditch | Grant | 2,825 ft (861 m) | 44°24′55″N 119°08′04″W﻿ / ﻿44.41528°N 119.13444°W﻿ / 44.41528; -119.13444﻿ (Lemons Ditch (Grant County, Oregon)) | Wolfinger Butte | 1153716 |
| Lenz Lateral | Umatilla | 673 ft (205 m) | 45°49′52″N 119°08′15″W﻿ / ﻿45.83111°N 119.13750°W﻿ / 45.83111; -119.13750﻿ (Lenz Lateral (Umatilla County, Oregon)) | Stanfield | 1123044 |
| Lewis Ditch | Wheeler | 3,642 ft (1,110 m) | 44°31′14″N 120°19′14″W﻿ / ﻿44.52056°N 120.32056°W﻿ / 44.52056; -120.32056﻿ (Lewis Ditch (Wheeler County, Oregon)) | Lawson Mountain | 1153832 |
| Lillard Ditch | Baker | 3,373 ft (1,028 m) | 44°55′20″N 117°51′25″W﻿ / ﻿44.92222°N 117.85694°W﻿ / 44.92222; -117.85694﻿ (Lillard Ditch (Baker County, Oregon)) | Magpie Peak | 1145006 |
| Little Butte Creek Siphon | Jackson | 1,378 ft (420 m) | 42°28′36″N 122°44′59″W﻿ / ﻿42.47667°N 122.74972°W﻿ / 42.47667; -122.74972﻿ (Little Butte Creek Siphon (Jackson County, Oregon)) | Brownsboro | 1123145 |
| Little Valley Lateral | Malheur | 2,589 ft (789 m) | 43°52′37″N 117°29′07″W﻿ / ﻿43.87694°N 117.48528°W﻿ / 43.87694; -117.48528﻿ (Little Valley Lateral (Malheur County, Oregon)) | Vines Hill | 1123305 |
| Littlefield Ditch | Baker | 4,311 ft (1,314 m) | 44°41′54″N 117°54′19″W﻿ / ﻿44.69833°N 117.90528°W﻿ / 44.69833; -117.90528﻿ (Littlefield Ditch (Baker County, Oregon)) | Blue Canyon | 1123322 |
| Locket Gulch Siphon | Malheur | 2,497 ft (761 m) | 43°53′13″N 117°05′49″W﻿ / ﻿43.88694°N 117.09694°W﻿ / 43.88694; -117.09694﻿ (Locket Gulch Siphon (Malheur County, Oregon)) | Cairo | 1123334 |
| Lone Pine Ditch | Union | 3,724 ft (1,135 m) | 45°01′35″N 118°04′18″W﻿ / ﻿45.02639°N 118.07167°W﻿ / 45.02639; -118.07167﻿ (Lone Pine Ditch (Union County, Oregon)) | Tucker Flat | 1145356 |
| Lorella Drain | Klamath | 4,150 ft (1,260 m) | 42°08′15″N 121°15′30″W﻿ / ﻿42.13750°N 121.25833°W﻿ / 42.13750; -121.25833﻿ (Lorella Drain (Klamath County, Oregon)) | Lorella | 1157069 |
| Lorella Lateral | Klamath | 4,160 ft (1,270 m) | 42°07′50″N 121°15′46″W﻿ / ﻿42.13056°N 121.26278°W﻿ / 42.13056; -121.26278﻿ (Lorella Lateral (Klamath County, Oregon)) | Lorella | 1157070 |
| Lost Boulder Ditch | Wasco | 3,133 ft (955 m) | 45°08′57″N 121°28′35″W﻿ / ﻿45.14917°N 121.47639°W﻿ / 45.14917; -121.47639﻿ (Lost Boulder Ditch (Wasco County, Oregon)) | Rock Creek Reservoir | 1145494 |
| Lousignont Canal | Washington | 174 ft (53 m) | 45°34′22″N 123°08′29″W﻿ / ﻿45.57278°N 123.14139°W﻿ / 45.57278; -123.14139﻿ (Lousignont Canal (Washington County, Oregon)) | Gales Creek | 1157972 |
| Love Ditch | Baker | 3,445 ft (1,050 m) | 44°45′47″N 117°30′17″W﻿ / ﻿44.76306°N 117.50472°W﻿ / 44.76306; -117.50472﻿ (Love Ditch (Baker County, Oregon)) | Keating | 1158335 |
| Love Loney Ditch | Umatilla | 538 ft (164 m) | 45°59′19″N 118°34′54″W﻿ / ﻿45.98861°N 118.58167°W﻿ / 45.98861; -118.58167﻿ (Love Loney Ditch (Umatilla County, Oregon)) | Waterman | 1129686 |
| Low Line Canal | Klamath | 4,094 ft (1,248 m) | 42°01′22″N 121°22′51″W﻿ / ﻿42.02278°N 121.38083°W﻿ / 42.02278; -121.38083﻿ (Low Line Canal (Klamath County, Oregon)) | Malin | 1135809 |
| Low Line Ditch | Klamath | 4,157 ft (1,267 m) | 42°09′24″N 121°20′40″W﻿ / ﻿42.15667°N 121.34444°W﻿ / 42.15667; -121.34444﻿ (Low Line Ditch (Klamath County, Oregon)) | Lorella | 1123544 |
| Low Line Ditch | Malheur | 2,713 ft (827 m) | 44°14′03″N 117°31′27″W﻿ / ﻿44.23417°N 117.52417°W﻿ / 44.23417; -117.52417﻿ (Low Line Ditch (Malheur County, Oregon)) | Brogan | 1158093 |
| Low Line Ditch | Hood River | 1,391 ft (424 m) | 45°36′38″N 121°38′15″W﻿ / ﻿45.61056°N 121.63750°W﻿ / 45.61056; -121.63750﻿ (Low Line Ditch (Hood River County, Oregon)) | Dee | 1158336 |
| Lower Alder Slope Ditch | Wallowa | 3,927 ft (1,197 m) | 45°24′13″N 117°18′41″W﻿ / ﻿45.40361°N 117.31139°W﻿ / 45.40361; -117.31139﻿ (Lower Alder Slope Ditch (Wallowa County, Oregon)) | Enterprise | 1123551 |
| Lower Ditch | Malheur | 2,188 ft (667 m) | 44°07′06″N 116°56′54″W﻿ / ﻿44.11833°N 116.94833°W﻿ / 44.11833; -116.94833﻿ (Lower Ditch (Malheur County, Oregon)) | Payette | 1123561 |
| Lower East Lateral | Jackson | 1,706 ft (520 m) | 42°14′13″N 122°44′59″W﻿ / ﻿42.23694°N 122.74972°W﻿ / 42.23694; -122.74972﻿ (Lower East Lateral (Jackson County, Oregon)) | Ashland | 1145616 |
| Lower Fisher Long Ditch | Baker | 3,615 ft (1,102 m) | 44°55′20″N 118°01′27″W﻿ / ﻿44.92222°N 118.02417°W﻿ / 44.92222; -118.02417﻿ (Lower Fisher Long Ditch (Baker County, Oregon)) | Rock Creek | 1123563 |
| Lower Marsh Canal | Lake | 4,288 ft (1,307 m) | 42°34′05″N 120°22′59″W﻿ / ﻿42.56806°N 120.38306°W﻿ / 42.56806; -120.38306﻿ (Lower Marsh Canal (Lake County, Oregon)) | Tucker Hill | 1153755 |
| Lower Pump Canal | Malheur | 2,241 ft (683 m) | 43°58′47″N 117°09′18″W﻿ / ﻿43.97972°N 117.15500°W﻿ / 43.97972; -117.15500﻿ (Lower Pump Canal (Malheur County, Oregon)) | Vale East | 1123584 |
| Lower Sevenmile Ditch | Klamath | 4,157 ft (1,267 m) | 42°40′16″N 122°03′24″W﻿ / ﻿42.67111°N 122.05667°W﻿ / 42.67111; -122.05667﻿ (Lower Sevenmile Ditch (Klamath County, Oregon)) | Mares Egg Spring | 1134811 |
| Lower Valley Ditch | Wallowa | 2,864 ft (873 m) | 45°36′33″N 117°33′01″W﻿ / ﻿45.60917°N 117.55028°W﻿ / 45.60917; -117.55028﻿ (Lower Valley Ditch (Wallowa County, Oregon)) | Wallowa | 1145643 |
| Luce Ditch | Grant | 3,025 ft (922 m) | 44°25′16″N 118°59′31″W﻿ / ﻿44.42111°N 118.99194°W﻿ / 44.42111; -118.99194﻿ (Luce Ditch (Grant County, Oregon)) | John Day | 1157835 |
| Luce Ditch | Lake | 4,642 ft (1,415 m) | 42°47′30″N 120°06′34″W﻿ / ﻿42.79167°N 120.10944°W﻿ / 42.79167; -120.10944﻿ (Luce Ditch (Lake County, Oregon)) | Coleman Hills | 1158716 |
| Lynns Ditch | Malheur | 4,514 ft (1,376 m) | 44°25′15″N 117°50′25″W﻿ / ﻿44.42083°N 117.84028°W﻿ / 44.42083; -117.84028﻿ (Lynns Ditch (Malheur County, Oregon)) | Wendt Butte | 1123637 |
| Lynns Ditch | Malheur | 3,993 ft (1,217 m) | 44°25′18″N 117°44′14″W﻿ / ﻿44.42167°N 117.73722°W﻿ / 44.42167; -117.73722﻿ (Lynns Ditch (Malheur County, Oregon)) | Bridgeport | 1123638 |
| M Canal | Umatilla | 486 ft (148 m) | 45°52′39″N 119°15′42″W﻿ / ﻿45.87750°N 119.26167°W﻿ / 45.87750; -119.26167﻿ (M Canal (Umatilla County, Oregon)) | Umatilla | 1123651 |
| Main Canal | Marion | 371 ft (113 m) | 44°47′37″N 122°52′55″W﻿ / ﻿44.79361°N 122.88194°W﻿ / 44.79361; -122.88194﻿ (Main Canal (Marion County, Oregon)) | Turner | 1166675 |
| Malheur Siphon | Malheur | 2,257 ft (688 m) | 43°58′52″N 117°03′27″W﻿ / ﻿43.98111°N 117.05750°W﻿ / 43.98111; -117.05750﻿ (Malheur Siphon (Malheur County, Oregon)) | Cairo | 1123713 |
| Mallett Drain | Malheur | 2,195 ft (669 m) | 43°59′40″N 117°06′58″W﻿ / ﻿43.99444°N 117.11611°W﻿ / 43.99444; -117.11611﻿ (Mallett Drain (Malheur County, Oregon)) | Cairo | 1123717 |
| Mansfield Ditch | Baker | 3,504 ft (1,068 m) | 44°56′56″N 118°01′15″W﻿ / ﻿44.94889°N 118.02083°W﻿ / 44.94889; -118.02083﻿ (Mansfield Ditch (Baker County, Oregon)) | Rock Creek | 1123735 |
| Marion Ditch | Marion | 348 ft (106 m) | 44°45′45″N 122°53′51″W﻿ / ﻿44.76250°N 122.89750°W﻿ / 44.76250; -122.89750﻿ (Marion Ditch (Marion County, Oregon)) | Turner | 1123760 |
| Marquam Dry Lake Canal | Multnomah | 13 ft (4.0 m) | 45°39′54″N 122°48′14″W﻿ / ﻿45.66500°N 122.80389°W﻿ / 45.66500; -122.80389﻿ (Marquam Dry Lake Canal (Multnomah County, Oregon)) | Sauvie Island | 1123781 |
| Maxwell Canal | Umatilla | 525 ft (160 m) | 45°49′32″N 119°17′33″W﻿ / ﻿45.82556°N 119.29250°W﻿ / 45.82556; -119.29250﻿ (Maxwell Canal (Umatilla County, Oregon)) | Hermiston | 1123855 |
| Maxwell Ditch | Baker | 3,501 ft (1,067 m) | 44°55′49″N 118°00′30″W﻿ / ﻿44.93028°N 118.00833°W﻿ / 44.93028; -118.00833﻿ (Maxwell Ditch (Baker County, Oregon)) | Rock Creek | 1123856 |
| Maxwell Ditch | Deschutes | 3,402 ft (1,037 m) | 44°14′39″N 121°30′51″W﻿ / ﻿44.24417°N 121.51417°W﻿ / 44.24417; -121.51417﻿ (Maxwell Ditch (Deschutes County, Oregon)) | Three Creek Butte | 1153109 |
| May Park Ditch | Union | 2,756 ft (840 m) | 45°20′25″N 118°03′47″W﻿ / ﻿45.34028°N 118.06306°W﻿ / 45.34028; -118.06306﻿ (May Park Ditch (Union County, Oregon)) | La Grande | 1164112 |
| Mayfield Ditch | Klamath | 4,334 ft (1,321 m) | 43°32′09″N 121°38′49″W﻿ / ﻿43.53583°N 121.64694°W﻿ / 43.53583; -121.64694﻿ (Mayfield Ditch (Klamath County, Oregon)) | Cryder Butte | 1153040 |
| McAlister Ditch | Union | 2,703 ft (824 m) | 45°19′09″N 117°59′04″W﻿ / ﻿45.31917°N 117.98444°W﻿ / 45.31917; -117.98444﻿ (McAlister Ditch (Union County, Oregon)) | Conley | 1164113 |
| McBride Ditch | Malheur | 2,162 ft (659 m) | 44°16′18″N 117°13′04″W﻿ / ﻿44.27167°N 117.21778°W﻿ / 44.27167; -117.21778﻿ (McBride Ditch (Malheur County, Oregon)) | Olds Ferry | 1130921 |
| McCord Ditch | Baker | 3,425 ft (1,044 m) | 44°47′03″N 117°51′59″W﻿ / ﻿44.78417°N 117.86639°W﻿ / 44.78417; -117.86639﻿ (McCord Ditch (Baker County, Oregon)) | Baker City | 1164114 |
| McDonald Ditch | Jackson | 4,091 ft (1,247 m) | 42°06′39″N 122°48′44″W﻿ / ﻿42.11083°N 122.81222°W﻿ / 42.11083; -122.81222﻿ (McDonald Ditch (Jackson County, Oregon)) | Siskiyou Peak | 1145967 |
| McEwen Valley Ditch | Baker | 4,281 ft (1,305 m) | 44°41′17″N 118°09′07″W﻿ / ﻿44.68806°N 118.15194°W﻿ / 44.68806; -118.15194﻿ (McEwen Valley Ditch (Baker County, Oregon)) | Sumpter | 1145976 |
| McKenzie Ditch | Lane | 436 ft (133 m) | 44°04′24″N 123°02′34″W﻿ / ﻿44.07333°N 123.04278°W﻿ / 44.07333; -123.04278﻿ (McKenzie Ditch (Lane County, Oregon)) | Eugene East | 1639025 |
| McKenzie-Greeley Ditch | Malheur | 3,763 ft (1,147 m) | 43°20′17″N 117°05′09″W﻿ / ﻿43.33806°N 117.08583°W﻿ / 43.33806; -117.08583﻿ (McKenzie-Greeley Ditch (Malheur County, Oregon)) | Rockville | 1130438 |
| McMullen Ditch | Baker | 2,520 ft (770 m) | 44°51′05″N 117°03′54″W﻿ / ﻿44.85139°N 117.06500°W﻿ / 44.85139; -117.06500﻿ (McMullen Ditch (Baker County, Oregon)) | Posy Valley | 1129555 |
| McPherson Ditch | Baker | 3,455 ft (1,053 m) | 44°29′45″N 117°49′41″W﻿ / ﻿44.49583°N 117.82806°W﻿ / 44.49583; -117.82806﻿ (McPherson Ditch (Baker County, Oregon)) | Wendt Butte | 1124018 |
| Medford Aqueduct | Jackson | 2,513 ft (766 m) | 42°32′56″N 122°36′03″W﻿ / ﻿42.54889°N 122.60083°W﻿ / 42.54889; -122.60083﻿ (Medford Aqueduct (Jackson County, Oregon)) | Butte Falls | 1146071 |
| Medford Irrigation District Canal | Jackson | 1,640 ft (500 m) | 42°26′59″N 122°43′45″W﻿ / ﻿42.44972°N 122.72917°W﻿ / 42.44972; -122.72917﻿ (Medford Irrigation District Canal (Jackson County, Oregon)) | Brownsboro | 1146072 |
| Melhase Ditch | Klamath | 4,176 ft (1,273 m) | 42°41′29″N 122°00′19″W﻿ / ﻿42.69139°N 122.00528°W﻿ / 42.69139; -122.00528﻿ (Melhase Ditch (Klamath County, Oregon)) | Mares Egg Spring | 1155324 |
| Middle Ditch | Malheur | 2,188 ft (667 m) | 44°09′50″N 116°57′09″W﻿ / ﻿44.16389°N 116.95250°W﻿ / 44.16389; -116.95250﻿ (Middle Ditch (Malheur County, Oregon)) | Weiser South | 1124097 |
| Mill Creek Canal | Wasco | 2,680 ft (820 m) | 44°53′33″N 121°29′26″W﻿ / ﻿44.89250°N 121.49056°W﻿ / 44.89250; -121.49056﻿ (Mill Creek Canal (Wasco County, Oregon)) | Hehe Butte | 1124167 |
| Mill Creek Lateral | Wasco | 2,838 ft (865 m) | 44°52′21″N 121°30′17″W﻿ / ﻿44.87250°N 121.50472°W﻿ / 44.87250; -121.50472﻿ (Mill Creek Lateral (Wasco County, Oregon)) | Sawmill Butte | 1124170 |
| Mill Ditch | Malheur | 2,234 ft (681 m) | 43°59′36″N 117°12′33″W﻿ / ﻿43.99333°N 117.20917°W﻿ / 43.99333; -117.20917﻿ (Mill Ditch (Malheur County, Oregon)) | Vale East | 1124171 |
| Mill Ditch | Baker | 3,573 ft (1,089 m) | 44°29′22″N 117°51′48″W﻿ / ﻿44.48944°N 117.86333°W﻿ / 44.48944; -117.86333﻿ (Mill Ditch (Baker County, Oregon)) | Wendt Butte | 1124172 |
| Miller Ditch | Harney | 3,622 ft (1,104 m) | 43°51′02″N 118°27′32″W﻿ / ﻿43.85056°N 118.45889°W﻿ / 43.85056; -118.45889﻿ (Miller Ditch (Harney County, Oregon)) | Drewsey | 1124195 |
| Miller Ditch | Baker | 3,507 ft (1,069 m) | 44°55′33″N 118°00′37″W﻿ / ﻿44.92583°N 118.01028°W﻿ / 44.92583; -118.01028﻿ (Miller Ditch (Baker County, Oregon)) | Rock Creek | 1124196 |
| Milton Ditch | Umatilla | 1,083 ft (330 m) | 45°55′30″N 118°23′02″W﻿ / ﻿45.92500°N 118.38389°W﻿ / 45.92500; -118.38389﻿ (Milton Ditch (Umatilla County, Oregon)) | Milton-Freewater | 1124224 |
| Mining Channel | Baker | 2,776 ft (846 m) | 44°53′05″N 117°08′14″W﻿ / ﻿44.88472°N 117.13722°W﻿ / 44.88472; -117.13722﻿ (Mining Channel (Baker County, Oregon)) | Jimtown | 1153705 |
| Mission Ditch | Marion | 184 ft (56 m) | 44°55′27″N 123°00′49″W﻿ / ﻿44.92417°N 123.01361°W﻿ / 44.92417; -123.01361﻿ (Mission Ditch (Marion County, Oregon)) | Salem West | 1163153 |
| Mitchell Butte Lateral | Malheur | 2,310 ft (700 m) | 43°49′18″N 117°05′26″W﻿ / ﻿43.82167°N 117.09056°W﻿ / 43.82167; -117.09056﻿ (Mitchell Butte Lateral (Malheur County, Oregon)) | Owyhee | 1124263 |
| Modoc Point Main Canal | Klamath | 4,163 ft (1,269 m) | 42°32′36″N 121°52′32″W﻿ / ﻿42.54333°N 121.87556°W﻿ / 42.54333; -121.87556﻿ (Modoc Point Main Canal (Klamath County, Oregon)) | Chiloquin | 1146383 |
| Moody Ditch | Union | 3,425 ft (1,044 m) | 45°02′44″N 117°58′39″W﻿ / ﻿45.04556°N 117.97750°W﻿ / 45.04556; -117.97750﻿ (Moody Ditch (Union County, Oregon)) | North Powder | 1116657 |
| Moonshine Ditch | Wallowa | 4,445 ft (1,355 m) | 45°19′40″N 117°14′12″W﻿ / ﻿45.32778°N 117.23667°W﻿ / 45.32778; -117.23667﻿ (Moonshine Ditch (Wallowa County, Oregon)) | Joseph | 1146430 |
| Moore Pratt Ditch | Baker | 3,323 ft (1,013 m) | 44°56′32″N 117°57′10″W﻿ / ﻿44.94222°N 117.95278°W﻿ / 44.94222; -117.95278﻿ (Moore Pratt Ditch (Baker County, Oregon)) | Haines | 1131473 |
| Morfitt Ditch | Malheur | 3,409 ft (1,039 m) | 44°23′00″N 117°43′34″W﻿ / ﻿44.38333°N 117.72611°W﻿ / 44.38333; -117.72611﻿ (Morfitt Ditch (Malheur County, Oregon)) | Bridgeport | 1131887 |
| Moroney Canal | Tillamook | 20 ft (6.1 m) | 45°37′44″N 123°56′15″W﻿ / ﻿45.62889°N 123.93750°W﻿ / 45.62889; -123.93750﻿ (Moroney Canal (Tillamook County, Oregon)) | Nehalem | 1132399 |
| Moss Ditch | Lake | 4,764 ft (1,452 m) | 42°31′25″N 120°26′39″W﻿ / ﻿42.52361°N 120.44417°W﻿ / 42.52361; -120.44417﻿ (Moss Ditch (Lake County, Oregon)) | Tucker Hill | 1153754 |
| Mount Hood Canal Hood | Hood River | 1,535 ft (468 m) | 45°32′04″N 121°34′12″W﻿ / ﻿45.53444°N 121.57000°W﻿ / 45.53444; -121.57000﻿ (Mount Hood Canal (Hood River County, Oregon)) | Parkdale | 1153230 |
| Murphy Ditch | Josephine | 1,033 ft (315 m) | 42°20′44″N 123°21′31″W﻿ / ﻿42.34556°N 123.35861°W﻿ / 42.34556; -123.35861﻿ (Murphy Ditch (Josephine County, Oregon)) | Murphy | 1157284 |
| Murray Ditch | Grant | 2,303 ft (702 m) | 44°29′45″N 119°34′49″W﻿ / ﻿44.49583°N 119.58028°W﻿ / 44.49583; -119.58028﻿ (Murray Ditch (Grant County, Oregon)) | Dayville | 1153771 |
| N Canal | Umatilla | 499 ft (152 m) | 45°51′25″N 119°16′36″W﻿ / ﻿45.85694°N 119.27667°W﻿ / 45.85694; -119.27667﻿ (N Canal (Umatilla County, Oregon)) | Hermiston | 1124584 |
| Neal Creek Lateral Hood | Hood River | 961 ft (293 m) | 45°37′24″N 121°29′54″W﻿ / ﻿45.62333°N 121.49833°W﻿ / 45.62333; -121.49833﻿ (Neal Creek Lateral (Hood River County, Oregon)) | Ketchum Reservoir | 1146742 |
| Nelson Ditch | Baker | 3,986 ft (1,215 m) | 44°49′49″N 118°00′30″W﻿ / ﻿44.83028°N 118.00833°W﻿ / 44.83028; -118.00833﻿ (Nelson Ditch (Baker County, Oregon)) | Elkhorn Peak | 1124651 |
| Nesley Ditch | Union | 2,785 ft (849 m) | 45°20′38″N 118°05′12″W﻿ / ﻿45.34389°N 118.08667°W﻿ / 45.34389; -118.08667﻿ (Nesley Ditch (Union County, Oregon)) | La Grande | 1164119 |
| Nevada Canal | Malheur | 2,208 ft (673 m) | 43°59′16″N 117°06′12″W﻿ / ﻿43.98778°N 117.10333°W﻿ / 43.98778; -117.10333﻿ (Nevada Canal (Malheur County, Oregon)) | Cairo | 1124657 |
| New Berryman Ditch | Jackson | 1,276 ft (389 m) | 42°15′19″N 123°11′44″W﻿ / ﻿42.25528°N 123.19556°W﻿ / 42.25528; -123.19556﻿ (New Berryman Ditch (Jackson County, Oregon)) | Applegate | 1135266 |
| New Home Ditch | Baker | 3,422 ft (1,043 m) | 44°47′20″N 117°49′00″W﻿ / ﻿44.78889°N 117.81667°W﻿ / 44.78889; -117.81667﻿ (New Home Ditch (Baker County, Oregon)) | Baker City | 1164120 |
| Newt Young Ditch | Baker | 2,352 ft (717 m) | 44°47′17″N 117°09′52″W﻿ / ﻿44.78806°N 117.16444°W﻿ / 44.78806; -117.16444﻿ (Newt Young Ditch (Baker County, Oregon)) | Richland | 1146816 |
| North Alkali Creek Siphon | Malheur | 2,493 ft (760 m) | 43°37′20″N 117°04′29″W﻿ / ﻿43.62222°N 117.07472°W﻿ / 43.62222; -117.07472﻿ (North Alkali Creek Siphon (Malheur County, Oregon)) | Graveyard Point | 1131221 |
| North Antelope Canal | Malheur | 4,262 ft (1,299 m) | 42°55′50″N 117°15′34″W﻿ / ﻿42.93056°N 117.25944°W﻿ / 42.93056; -117.25944﻿ (North Antelope Canal (Malheur County, Oregon)) | Danner | 1130455 |
| North Canal | Malheur | 2,533 ft (772 m) | 43°52′00″N 117°06′40″W﻿ / ﻿43.86667°N 117.11111°W﻿ / 43.86667; -117.11111﻿ (North Canal (Malheur County, Oregon)) | Owyhee | 1124724 |
| North Canal | Klamath | 4,101 ft (1,250 m) | 42°03′40″N 121°45′46″W﻿ / ﻿42.06111°N 121.76278°W﻿ / 42.06111; -121.76278﻿ (North Canal (Klamath County, Oregon)) | Worden | 1124725 |
| North Canal | Klamath | 4,190 ft (1,280 m) | 42°09′05″N 121°16′58″W﻿ / ﻿42.15139°N 121.28278°W﻿ / 42.15139; -121.28278﻿ (North Canal (Klamath County, Oregon)) | Lorella | 1124726 |
| North Canal | Lake | 4,856 ft (1,480 m) | 42°08′00″N 120°33′07″W﻿ / ﻿42.13333°N 120.55194°W﻿ / 42.13333; -120.55194﻿ (North Canal (Lake County, Oregon)) | Drews Gap | 1146887 |
| North Canal Flume | Lake | 4,839 ft (1,475 m) | 42°11′25″N 120°30′52″W﻿ / ﻿42.19028°N 120.51444°W﻿ / 42.19028; -120.51444﻿ (North Canal Flume (Lake County, Oregon)) | Drews Gap | 1160988 |
| North Canal Lateral | Malheur | 2,503 ft (763 m) | 43°57′10″N 117°05′25″W﻿ / ﻿43.95278°N 117.09028°W﻿ / 43.95278; -117.09028﻿ (North Canal Lateral (Malheur County, Oregon)) | Cairo | 1124728 |
| North Dixie Ditch | Baker | 3,711 ft (1,131 m) | 44°28′25″N 117°29′59″W﻿ / ﻿44.47361°N 117.49972°W﻿ / 44.47361; -117.49972﻿ (North Dixie Ditch (Baker County, Oregon)) | Rye Valley | 1131861 |
| North Fork Ditch | Klamath | 4,485 ft (1,367 m) | 42°27′40″N 121°02′54″W﻿ / ﻿42.46111°N 121.04833°W﻿ / 42.46111; -121.04833﻿ (North Fork Ditch (Klamath County, Oregon)) | Bly | 1155309 |
| North Oakander Drain | Malheur | 2,264 ft (690 m) | 43°42′09″N 117°03′18″W﻿ / ﻿43.70250°N 117.05500°W﻿ / 43.70250; -117.05500﻿ (North Oakander Drain (Malheur County, Oregon)) | Adrian | 1124831 |
| North Side Canal | Malheur | 3,989 ft (1,216 m) | 42°56′44″N 117°30′17″W﻿ / ﻿42.94556°N 117.50472°W﻿ / 42.94556; -117.50472﻿ (North Side Canal (Malheur County, Oregon)) | Arock | 1124841 |
| North Unit Main Canal | Deschutes | 2,959 ft (902 m) | 44°18′19″N 121°06′39″W﻿ / ﻿44.30528°N 121.11083°W﻿ / 44.30528; -121.11083﻿ (North Unit Main Canal (Deschutes County, Oregon)) | O'Neil | 1147071 |
| Nouque Ditch | Malheur | 4,826 ft (1,471 m) | 42°00′55″N 117°37′39″W﻿ / ﻿42.01528°N 117.62750°W﻿ / 42.01528; -117.62750﻿ (Nouque Ditch (Malheur County, Oregon)) | Tenmile Ranch | 1130443 |
| Number One C-Drain | Klamath | 4,098 ft (1,249 m) | 42°11′00″N 121°44′44″W﻿ / ﻿42.18333°N 121.74556°W﻿ / 42.18333; -121.74556﻿ (Number One C-Drain (Klamath County, Oregon)) | Altamont | 1134733 |
| Number Six Canal | Lake | 4,846 ft (1,477 m) | 42°09′31″N 120°30′06″W﻿ / ﻿42.15861°N 120.50167°W﻿ / 42.15861; -120.50167﻿ (Number Six Canal (Lake County, Oregon)) | Drews Gap | 1146850 |
| Nye Ditch | Jackson | 2,441 ft (744 m) | 42°43′24″N 122°32′39″W﻿ / ﻿42.72333°N 122.54417°W﻿ / 42.72333; -122.54417﻿ (Nye Ditch (Jackson County, Oregon)) | Cascade Gorge | 1116718 |
| Nyssa Drain | Malheur | 2,182 ft (665 m) | 43°53′46″N 117°00′32″W﻿ / ﻿43.89611°N 117.00889°W﻿ / 43.89611; -117.00889﻿ (Nyssa Drain (Malheur County, Oregon)) | Cairo | 1124872 |
| Nyssa-Arcadia Drain | Malheur | 2,182 ft (665 m) | 43°53′30″N 117°00′16″W﻿ / ﻿43.89167°N 117.00444°W﻿ / 43.89167; -117.00444﻿ (Nyssa-Arcadia Drain (Malheur County, Oregon)) | Cairo | 1166863 |
| O Canal | Umatilla | 472 ft (144 m) | 45°54′32″N 119°16′44″W﻿ / ﻿45.90889°N 119.27889°W﻿ / 45.90889; -119.27889﻿ (O Canal (Umatilla County, Oregon)) | Umatilla | 1124873 |
| O Pipe | Umatilla | 466 ft (142 m) | 45°53′54″N 119°15′12″W﻿ / ﻿45.89833°N 119.25333°W﻿ / 45.89833; -119.25333﻿ (O Pipe (Umatilla County, Oregon)) | Umatilla | 1124874 |
| O V L Ditch | Lake | 4,308 ft (1,313 m) | 42°30′45″N 120°18′24″W﻿ / ﻿42.51250°N 120.30667°W﻿ / 42.51250; -120.30667﻿ (O V L Ditch (Lake County, Oregon)) | Coglan Buttes SE | 1131005 |
| OA Lateral | Umatilla | 463 ft (141 m) | 45°54′02″N 119°16′27″W﻿ / ﻿45.90056°N 119.27417°W﻿ / 45.90056; -119.27417﻿ (OA Lateral (Umatilla County, Oregon)) | Umatilla | 1124875 |
| OB Lateral | Umatilla | 463 ft (141 m) | 45°54′35″N 119°17′19″W﻿ / ﻿45.90972°N 119.28861°W﻿ / 45.90972; -119.28861﻿ (OB Lateral (Umatilla County, Oregon)) | Umatilla | 1124876 |
| Oak Grove Ditch | Hood River | 3,291 ft (1,003 m) | 45°37′06″N 121°42′07″W﻿ / ﻿45.61833°N 121.70194°W﻿ / 45.61833; -121.70194﻿ (Oak Grove Ditch (Hood River County, Oregon)) | Dee | 1147115 |
| Oakander Drain | Malheur | 2,244 ft (684 m) | 43°42′40″N 117°03′51″W﻿ / ﻿43.71111°N 117.06417°W﻿ / 43.71111; -117.06417﻿ (Oakander Drain (Malheur County, Oregon)) | Adrian | 1124920 |
| Ochoco Distribution Canal | Crook | 2,982 ft (909 m) | 44°20′59″N 120°52′09″W﻿ / ﻿44.34972°N 120.86917°W﻿ / 44.34972; -120.86917﻿ (Ochoco Distribution Canal (Crook County, Oregon)) | Prineville | 1153122 |
| Ochoco Main Canal | Crook | 3,051 ft (930 m) | 44°19′30″N 120°47′04″W﻿ / ﻿44.32500°N 120.78444°W﻿ / 44.32500; -120.78444﻿ (Ochoco Main Canal (Crook County, Oregon)) | Prineville | 1147144 |
| Oliver Drain | Malheur | 4,318 ft (1,316 m) | 43°03′54″N 117°18′11″W﻿ / ﻿43.06500°N 117.30306°W﻿ / 43.06500; -117.30306﻿ (Oliver Drain (Malheur County, Oregon)) | Cow Lakes | 1124984 |
| Ontario Nyssa Canal | Malheur | 2,297 ft (700 m) | 43°53′48″N 117°02′15″W﻿ / ﻿43.89667°N 117.03750°W﻿ / 43.89667; -117.03750﻿ (Ontario Nyssa Canal (Malheur County, Oregon)) | Cairo | 1125004 |
| Orchard Ridge Ditch | Wasco | 2,257 ft (688 m) | 45°23′24″N 121°17′24″W﻿ / ﻿45.39000°N 121.29000°W﻿ / 45.39000; -121.29000﻿ (Orchard Ridge Ditch (Wasco County, Oregon)) | Wolf Run | 1157088 |
| Ordell Ditch | Union | 2,713 ft (827 m) | 45°23′04″N 118°02′03″W﻿ / ﻿45.38444°N 118.03417°W﻿ / 45.38444; -118.03417﻿ (Ordell Ditch (Union County, Oregon)) | Summerville | 1147257 |
| Oswego Canal | Clackamas | 105 ft (32 m) | 45°23′37″N 122°43′10″W﻿ / ﻿45.39361°N 122.71944°W﻿ / 45.39361; -122.71944﻿ (Oswego Canal (Clackamas County, Oregon)) | Lake Oswego | 1125055 |
| Outside Canal | Lake | 4,314 ft (1,315 m) | 42°40′13″N 120°25′45″W﻿ / ﻿42.67028°N 120.42917°W﻿ / 42.67028; -120.42917﻿ (Outside Canal (Lake County, Oregon)) | Coglan Buttes | 1147297 |
| Owens Ditch | Grant | 4,649 ft (1,417 m) | 44°03′15″N 118°58′34″W﻿ / ﻿44.05417°N 118.97611°W﻿ / 44.05417; -118.97611﻿ (Owens Ditch (Grant County, Oregon)) | Silvies | 1152973 |
| Owyhee Canal | Malheur | 2,372 ft (723 m) | 44°01′04″N 117°12′22″W﻿ / ﻿44.01778°N 117.20611°W﻿ / 44.01778; -117.20611﻿ (Owyhee Canal (Malheur County, Oregon)) | Henry Gulch | 1166691 |
| Owyhee Ditch | Malheur | 2,234 ft (681 m) | 43°47′24″N 117°04′59″W﻿ / ﻿43.79000°N 117.08306°W﻿ / 43.79000; -117.08306﻿ (Owyhee Ditch (Malheur County, Oregon)) | Owyhee | 1125095 |
| Owyhee Siphon | Malheur | 2,333 ft (711 m) | 43°44′10″N 117°10′39″W﻿ / ﻿43.73611°N 117.17750°W﻿ / 43.73611; -117.17750﻿ (Owyhee Siphon (Malheur County, Oregon)) | Owyhee Dam | 1131225 |
| P P & L Canal | Jackson | 2,628 ft (801 m) | 42°45′04″N 122°30′26″W﻿ / ﻿42.75111°N 122.50722°W﻿ / 42.75111; -122.50722﻿ (P P & L Canal (Jackson County, Oregon)) | Whetstone Point | 1159373 |
| P1 Canal | Siskiyou (CA) | 4,091 ft (1,247 m) | 41°59′06″N 121°38′35″W﻿ / ﻿41.98500°N 121.64306°W﻿ / 41.98500; -121.64306﻿ (P1 Canal (Siskiyou County, California)) | Lower Klamath Lake | 267150 |
| Packwood Ditch | Baker | 3,684 ft (1,123 m) | 44°29′40″N 118°05′44″W﻿ / ﻿44.49444°N 118.09556°W﻿ / 44.49444; -118.09556﻿ (Packwood Ditch (Baker County, Oregon)) | Hereford | 1125120 |
| Palmer Ditch | Crook | 3,940 ft (1,200 m) | 44°08′15″N 119°44′44″W﻿ / ﻿44.13750°N 119.74556°W﻿ / 44.13750; -119.74556﻿ (Palmer Ditch (Crook County, Oregon)) | Powell Mountain | 1157567 |
| Panama Ditch | Grant | 2,877 ft (877 m) | 44°25′12″N 119°07′23″W﻿ / ﻿44.42000°N 119.12306°W﻿ / 44.42000; -119.12306﻿ (Panama Ditch (Grant County, Oregon)) | Mount Vernon | 1152797 |
| Parker Ditch | Malheur | 4,902 ft (1,494 m) | 42°38′48″N 117°03′58″W﻿ / ﻿42.64667°N 117.06611°W﻿ / 42.64667; -117.06611﻿ (Parker Ditch (Malheur County, Oregon)) | Juniper Point | 1131219 |
| Patillo Ditches | Jackson | 1,588 ft (484 m) | 42°36′19″N 122°58′54″W﻿ / ﻿42.60528°N 122.98167°W﻿ / 42.60528; -122.98167﻿ (Patillo Ditches (Jackson County, Oregon)) | Boswell Mountain | 1135443 |
| Payton Ditch | Baker | 3,346 ft (1,020 m) | 44°52′08″N 117°54′04″W﻿ / ﻿44.86889°N 117.90111°W﻿ / 44.86889; -117.90111﻿ (Payton Ditch (Baker County, Oregon)) | Wingville | 1125252 |
| Pearson Ditch | Baker | 3,340 ft (1,020 m) | 45°00′12″N 117°57′54″W﻿ / ﻿45.00333°N 117.96500°W﻿ / 45.00333; -117.96500﻿ (Pearson Ditch (Baker County, Oregon)) | North Powder | 1131532 |
| Pelican Cut Canal | Klamath | 4,147 ft (1,264 m) | 42°27′24″N 122°05′09″W﻿ / ﻿42.45667°N 122.08583°W﻿ / 42.45667; -122.08583﻿ (Pelican Cut Canal (Klamath County, Oregon)) | Pelican Bay | 1135152 |
| Peninsula Drainage Canal | Multnomah | 13 ft (4.0 m) | 45°35′37″N 122°38′25″W﻿ / ﻿45.59361°N 122.64028°W﻿ / 45.59361; -122.64028﻿ (Peninsula Drainage Canal (Multnomah County, Oregon)) | Portland | 1125284 |
| Penstock Olsen Ditch | Baker | 3,996 ft (1,218 m) | 44°55′15″N 118°03′04″W﻿ / ﻿44.92083°N 118.05111°W﻿ / 44.92083; -118.05111﻿ (Penstock Olsen Ditch (Baker County, Oregon)) | Rock Creek | 1125294 |
| Peoples Irrigation Company Ditch | Crook | 2,838 ft (865 m) | 44°19′39″N 120°54′37″W﻿ / ﻿44.32750°N 120.91028°W﻿ / 44.32750; -120.91028﻿ (Peoples Irrigation Company Ditch (Crook County, Oregon)) | Houston Lake | 1129578 |
| Perkins Ditch | Baker | 2,707 ft (825 m) | 44°49′47″N 117°31′00″W﻿ / ﻿44.82972°N 117.51667°W﻿ / 44.82972; -117.51667﻿ (Perkins Ditch (Baker County, Oregon)) | Keating | 1158416 |
| Perrin Lateral | Marion | 328 ft (100 m) | 44°48′35″N 122°55′24″W﻿ / ﻿44.80972°N 122.92333°W﻿ / 44.80972; -122.92333﻿ (Perrin Lateral (Marion County, Oregon)) | Turner | 1125308 |
| Peters Ditch | Linn | 351 ft (107 m) | 44°41′48″N 122°48′56″W﻿ / ﻿44.69667°N 122.81556°W﻿ / 44.69667; -122.81556﻿ (Peters Ditch (Linn County, Oregon)) | Scio | 1125317 |
| Pettegrew Lateral | Jackson | 1,526 ft (465 m) | 42°31′04″N 122°47′14″W﻿ / ﻿42.51778°N 122.78722°W﻿ / 42.51778; -122.78722﻿ (Pettegrew Lateral (Jackson County, Oregon)) | Shady Cove | 1125336 |
| Philling-McFadden Ditch | Wheeler | 3,743 ft (1,141 m) | 44°27′30″N 119°48′38″W﻿ / ﻿44.45833°N 119.81056°W﻿ / 44.45833; -119.81056﻿ (Philling-McFadden Ditch (Wheeler County, Oregon)) | Antone | 1157824 |
| Phillips Ditch | Baker | 5,072 ft (1,546 m) | 45°02′00″N 117°28′05″W﻿ / ﻿45.03333°N 117.46806°W﻿ / 45.03333; -117.46806﻿ (Phillips Ditch (Baker County, Oregon)) | Bennet Peak | 1125346 |
| Phillips Ditch | Baker | 3,684 ft (1,123 m) | 44°49′50″N 117°58′44″W﻿ / ﻿44.83056°N 117.97889°W﻿ / 44.83056; -117.97889﻿ (Phillips Ditch (Baker County, Oregon)) | Wingville | 1132506 |
| Phillips Ditch | Baker | 3,140 ft (960 m) | 44°53′12″N 117°28′31″W﻿ / ﻿44.88667°N 117.47528°W﻿ / 44.88667; -117.47528﻿ (Phillips Ditch (Baker County, Oregon)) | Balm Creek Reservoir | 1147638 |
| Phoenix Canal | Jackson | 1,512 ft (461 m) | 42°18′04″N 122°54′16″W﻿ / ﻿42.30111°N 122.90444°W﻿ / 42.30111; -122.90444﻿ (Phoenix Canal (Jackson County, Oregon)) | Medford West | 1125349 |
| Pilot Butte Canal | Deschutes | 3,127 ft (953 m) | 44°12′32″N 121°14′02″W﻿ / ﻿44.20889°N 121.23389°W﻿ / 44.20889; -121.23389﻿ (Pilot Butte Canal (Deschutes County, Oregon)) | Forked Horn Butte | 1147673 |
| Pilot Butte North Canal | Crook | 2,953 ft (900 m) | 44°23′06″N 121°04′41″W﻿ / ﻿44.38500°N 121.07806°W﻿ / 44.38500; -121.07806﻿ (Pilot Butte North Canal (Crook County, Oregon)) | Gray Butte | 1147675 |
| Pilot Butte South Canal | Crook | 2,894 ft (882 m) | 44°23′01″N 121°03′15″W﻿ / ﻿44.38361°N 121.05417°W﻿ / 44.38361; -121.05417﻿ (Pilot Butte South Canal (Crook County, Oregon)) | Gray Butte | 1147676 |
| Placer Ditch | Grant | 5,938 ft (1,810 m) | 44°43′08″N 118°28′32″W﻿ / ﻿44.71889°N 118.47556°W﻿ / 44.71889; -118.47556﻿ (Placer Ditch (Grant County, Oregon)) | Greenhorn | 1147787 |
| Plainview Ditch | Deschutes | 3,274 ft (998 m) | 44°13′20″N 121°28′29″W﻿ / ﻿44.22222°N 121.47472°W﻿ / 44.22222; -121.47472﻿ (Plainview Ditch (Deschutes County, Oregon)) | Tumalo Dam | 1147791 |
| Pleasant View Canal | Umatilla | 971 ft (296 m) | 45°56′38″N 118°24′27″W﻿ / ﻿45.94389°N 118.40750°W﻿ / 45.94389; -118.40750﻿ (Pleasant View Canal (Umatilla County, Oregon)) | Milton-Freewater | 1125487 |
| Plevna Ditch | Klamath | 4,121 ft (1,256 m) | 42°10′15″N 121°50′29″W﻿ / ﻿42.17083°N 121.84139°W﻿ / 42.17083; -121.84139﻿ (Plevna Ditch (Klamath County, Oregon)) | Klamath Falls | 1162442 |
| Pole Creek Ditch | Deschutes | 3,898 ft (1,188 m) | 44°14′15″N 121°36′18″W﻿ / ﻿44.23750°N 121.60500°W﻿ / 44.23750; -121.60500﻿ (Pole Creek Ditch (Deschutes County, Oregon)) | Three Creek Butte | 1147849 |
| Poley-Allen Ditch | Wallowa | 3,425 ft (1,044 m) | 45°29′03″N 117°26′19″W﻿ / ﻿45.48417°N 117.43861°W﻿ / 45.48417; -117.43861﻿ (Poley-Allen Ditch (Wallowa County, Oregon)) | Lostine | 1147860 |
| Posy Valley Ditch | Baker | 3,107 ft (947 m) | 44°52′09″N 117°08′19″W﻿ / ﻿44.86917°N 117.13861°W﻿ / 44.86917; -117.13861﻿ (Posy Valley Ditch (Baker County, Oregon)) | Richland | 1147926 |
| Potter Ditch | Wheeler | 1,785 ft (544 m) | 44°49′20″N 119°44′34″W﻿ / ﻿44.82222°N 119.74278°W﻿ / 44.82222; -119.74278﻿ (Potter Ditch (Wheeler County, Oregon)) | Kimberly | 1116527 |
| Poujade Ditch | Harney | 4,144 ft (1,263 m) | 43°37′28″N 118°43′24″W﻿ / ﻿43.62444°N 118.72333°W﻿ / 43.62444; -118.72333﻿ (Poujade Ditch (Harney County, Oregon)) | Carson Point | 1166779 |
| Power Canal | Hood River | 203 ft (62 m) | 45°41′19″N 121°30′40″W﻿ / ﻿45.68861°N 121.51111°W﻿ / 45.68861; -121.51111﻿ (Power Canal (Hood River County, Oregon)) | Hood River | 1129666 |
| Powers Ditch | Baker | 3,681 ft (1,122 m) | 44°59′51″N 118°04′38″W﻿ / ﻿44.99750°N 118.07722°W﻿ / 44.99750; -118.07722﻿ (Powers Ditch (Baker County, Oregon)) | Rock Creek | 1125644 |
| Prescott Ditch | Union | 2,825 ft (861 m) | 45°11′59″N 117°51′39″W﻿ / ﻿45.19972°N 117.86083°W﻿ / 45.19972; -117.86083﻿ (Prescott Ditch (Union County, Oregon)) | Union | 1129460 |
| Priday Ditch | Lake | 5,243 ft (1,598 m) | 42°26′15″N 120°05′34″W﻿ / ﻿42.43750°N 120.09278°W﻿ / 42.43750; -120.09278﻿ (Priday Ditch (Lake County, Oregon)) | Drake Peak NE | 1131106 |
| Pump Ditch | Malheur | 2,346 ft (715 m) | 43°58′52″N 117°16′11″W﻿ / ﻿43.98111°N 117.26972°W﻿ / 43.98111; -117.26972﻿ (Pump Ditch (Malheur County, Oregon)) | Vale West | 1125701 |
| Purvis Drain | Malheur | 2,313 ft (705 m) | 43°55′50″N 117°22′04″W﻿ / ﻿43.93056°N 117.36778°W﻿ / 43.93056; -117.36778﻿ (Purvis Drain (Malheur County, Oregon)) | Vale West | 1129752 |
| Q Street Canal | Lane | 443 ft (135 m) | 44°03′39″N 123°02′54″W﻿ / ﻿44.06083°N 123.04833°W﻿ / 44.06083; -123.04833﻿ (Q Street Canal (Lane County, Oregon)) | Eugene East | 1129647 |
| R Canal | Umatilla | 541 ft (165 m) | 45°52′34″N 119°18′43″W﻿ / ﻿45.87611°N 119.31194°W﻿ / 45.87611; -119.31194﻿ (R Canal (Umatilla County, Oregon)) | Umatilla | 1125758 |
| R-3 Pipe | Umatilla | 541 ft (165 m) | 45°52′27″N 119°16′53″W﻿ / ﻿45.87417°N 119.28139°W﻿ / 45.87417; -119.28139﻿ (R-3 Pipe (Umatilla County, Oregon)) | Hermiston | 1125760 |
| Red Ditch | Jackson | 1,093 ft (333 m) | 42°31′05″N 123°10′16″W﻿ / ﻿42.51806°N 123.17111°W﻿ / 42.51806; -123.17111﻿ (Red Ditch (Jackson County, Oregon)) | Wimer | 1125876 |
| Red Drain | Malheur | 2,254 ft (687 m) | 43°42′18″N 117°04′27″W﻿ / ﻿43.70500°N 117.07417°W﻿ / 43.70500; -117.07417﻿ (Red Drain (Malheur County, Oregon)) | Adrian | 1125877 |
| Red House Ditch | Lake | 4,334 ft (1,321 m) | 42°42′55″N 120°30′39″W﻿ / ﻿42.71528°N 120.51083°W﻿ / 42.71528; -120.51083﻿ (Red House Ditch (Lake County, Oregon)) | Paisley | 1148310 |
| Reed Ditch | Baker | 3,556 ft (1,084 m) | 44°30′11″N 117°56′42″W﻿ / ﻿44.50306°N 117.94500°W﻿ / 44.50306; -117.94500﻿ (Reed Ditch (Baker County, Oregon)) | Brannan Gulch | 1125922 |
| Reed Ditch | Deschutes | 3,261 ft (994 m) | 44°15′59″N 121°32′04″W﻿ / ﻿44.26639°N 121.53444°W﻿ / 44.26639; -121.53444﻿ (Reed Ditch (Deschutes County, Oregon)) | Sisters | 1153106 |
| Reeds Ditch | Baker | 3,550 ft (1,080 m) | 44°30′00″N 117°56′14″W﻿ / ﻿44.50000°N 117.93722°W﻿ / 44.50000; -117.93722﻿ (Reeds Ditch (Baker County, Oregon)) | Devils Heel | 1131953 |
| Rehart-Salt Creek Ditch | Lake | 4,777 ft (1,456 m) | 42°18′50″N 120°17′59″W﻿ / ﻿42.31389°N 120.29972°W﻿ / 42.31389; -120.29972﻿ (Rehart-Salt Creek Ditch (Lake County, Oregon)) | Crooked Creek Valley | 1130997 |
| Rineman Ditch | Harney | 4,104 ft (1,251 m) | 43°15′33″N 118°53′26″W﻿ / ﻿43.25917°N 118.89056°W﻿ / 43.25917; -118.89056﻿ (Rineman Ditch (Harney County, Oregon)) | The Narrows | 1159208 |
| Ringsmeyer Ditch | Grant | 2,303 ft (702 m) | 44°29′02″N 119°33′54″W﻿ / ﻿44.48389°N 119.56500°W﻿ / 44.48389; -119.56500﻿ (Ringsmeyer Ditch (Grant County, Oregon)) | Dayville | 1153769 |
| Riverside Canal | Malheur | 2,260 ft (690 m) | 43°42′10″N 117°03′39″W﻿ / ﻿43.70278°N 117.06083°W﻿ / 43.70278; -117.06083﻿ (Riverside Canal (Malheur County, Oregon)) | Adrian | 1126064 |
| Robbins Ditch | Harney | 3,757 ft (1,145 m) | 43°52′43″N 118°35′55″W﻿ / ﻿43.87861°N 118.59861°W﻿ / 43.87861; -118.59861﻿ (Robbins Ditch (Harney County, Oregon)) | Moffit Table | 1148534 |
| Robbins Drain | Malheur | 2,313 ft (705 m) | 43°55′25″N 117°22′04″W﻿ / ﻿43.92361°N 117.36778°W﻿ / 43.92361; -117.36778﻿ (Robbins Drain (Malheur County, Oregon)) | Vale West | 1129751 |
| Robertson Ditch | Union | 3,281 ft (1,000 m) | 45°00′27″N 117°38′54″W﻿ / ﻿45.00750°N 117.64833°W﻿ / 45.00750; -117.64833﻿ (Robertson Ditch (Union County, Oregon)) | Medical Springs | 1131546 |
| Rock Creek Ditch | Wasco | 1,932 ft (589 m) | 45°11′49″N 121°18′19″W﻿ / ﻿45.19694°N 121.30528°W﻿ / 45.19694; -121.30528﻿ (Rock Creek Ditch (Wasco County, Oregon)) | Wamic | 1153170 |
| Rock Spring Siphon | Malheur | 2,493 ft (760 m) | 43°45′48″N 117°11′37″W﻿ / ﻿43.76333°N 117.19361°W﻿ / 43.76333; -117.19361﻿ (Rock Spring Siphon (Malheur County, Oregon)) | Mitchell Butte | 1126218 |
| Russell Drain | Malheur | 2,277 ft (694 m) | 43°55′10″N 117°17′04″W﻿ / ﻿43.91944°N 117.28444°W﻿ / 43.91944; -117.28444﻿ (Russell Drain (Malheur County, Oregon)) | Vale West | 1129750 |
| Rutherford Ditch | Malheur | 3,619 ft (1,103 m) | 44°21′04″N 117°52′35″W﻿ / ﻿44.35111°N 117.87639°W﻿ / 44.35111; -117.87639﻿ (Rutherford Ditch (Malheur County, Oregon)) | Ironside | 1161052 |
| Ryegrass Ditch | Crook | 2,867 ft (874 m) | 44°19′13″N 120°51′46″W﻿ / ﻿44.32028°N 120.86278°W﻿ / 44.32028; -120.86278﻿ (Ryegrass Ditch (Crook County, Oregon)) | Prineville | 1148882 |
| S Canal | Umatilla | 463 ft (141 m) | 45°53′33″N 119°15′52″W﻿ / ﻿45.89250°N 119.26444°W﻿ / 45.89250; -119.26444﻿ (S Canal (Umatilla County, Oregon)) | Umatilla | 1126396 |
| Saint Clair Canal | Harney | 4,108 ft (1,252 m) | 43°16′46″N 119°14′04″W﻿ / ﻿43.27944°N 119.23444°W﻿ / 43.27944; -119.23444﻿ (Saint Clair Canal (Harney County, Oregon)) | Northwest Harney Lake | 1133760 |
| Salem Ditch | Marion | 433 ft (132 m) | 44°48′22″N 122°49′14″W﻿ / ﻿44.80611°N 122.82056°W﻿ / 44.80611; -122.82056﻿ (Salem Ditch (Marion County, Oregon)) | Stayton | 1126505 |
| Sand Creek Canal | Klamath | 4,636 ft (1,413 m) | 42°52′24″N 121°53′29″W﻿ / ﻿42.87333°N 121.89139°W﻿ / 42.87333; -121.89139﻿ (Sand Creek Canal (Klamath County, Oregon)) | Sun Pass | 1154994 |
| Scott Ditch | Malheur | 3,583 ft (1,092 m) | 42°47′39″N 117°44′53″W﻿ / ﻿42.79417°N 117.74806°W﻿ / 42.79417; -117.74806﻿ (Scott Ditch (Malheur County, Oregon)) | Rome | 1126687 |
| Scott Ditch | Wasco | 3,383 ft (1,031 m) | 45°07′44″N 117°57′46″W﻿ / ﻿45.12889°N 117.96278°W﻿ / 45.12889; -117.96278﻿ (Scott Ditch (Wasco County, Oregon)) | Craig Mountain | 1130904 |
| Scotts Ditch | Malheur | 4,564 ft (1,391 m) | 42°41′25″N 117°19′53″W﻿ / ﻿42.69028°N 117.33139°W﻿ / 42.69028; -117.33139﻿ (Scotts Ditch (Malheur County, Oregon)) | Skull Creek | 1157305 |
| Seely Ditch | Clackamas | 144 ft (44 m) | 45°18′59″N 122°47′04″W﻿ / ﻿45.31639°N 122.78444°W﻿ / 45.31639; -122.78444﻿ (Seely Ditch (Clackamas County, Oregon)) | Sherwood | 1162796 |
| Segundo Ditch | Malheur | 4,951 ft (1,509 m) | 42°12′00″N 117°53′51″W﻿ / ﻿42.20000°N 117.89750°W﻿ / 42.20000; -117.89750﻿ (Segundo Ditch (Malheur County, Oregon)) | Oregon Canyon Ranch | 1133156 |
| Sevenmile Canal | Klamath | 4,144 ft (1,263 m) | 42°34′59″N 121°58′04″W﻿ / ﻿42.58306°N 121.96778°W﻿ / 42.58306; -121.96778﻿ (Sevenmile Canal (Klamath County, Oregon)) | Agency Lake | 1154302 |
| Sevenmile Ditch | Klamath | 4,183 ft (1,275 m) | 42°41′55″N 122°03′34″W﻿ / ﻿42.69861°N 122.05944°W﻿ / 42.69861; -122.05944﻿ (Sevenmile Ditch (Klamath County, Oregon)) | Mares Egg Spring | 1134810 |
| Sharp Ditch | Malheur | 4,321 ft (1,317 m) | 42°59′20″N 117°09′51″W﻿ / ﻿42.98889°N 117.16417°W﻿ / 42.98889; -117.16417﻿ (Sharp Ditch (Malheur County, Oregon)) | Antelope Reservoir | 1130453 |
| Shaw Brant Ditch | Union | 3,514 ft (1,071 m) | 45°04′32″N 117°58′31″W﻿ / ﻿45.07556°N 117.97528°W﻿ / 45.07556; -117.97528﻿ (Shaw Brant Ditch (Union County, Oregon)) | North Powder | 1149295 |
| Shaw Ditch | Union | 3,412 ft (1,040 m) | 45°00′52″N 117°58′23″W﻿ / ﻿45.01444°N 117.97306°W﻿ / 45.01444; -117.97306﻿ (Shaw Ditch (Union County, Oregon)) | North Powder | 1149298 |
| Shaw Stewart Ditch | Baker | 3,592 ft (1,095 m) | 44°41′48″N 117°51′23″W﻿ / ﻿44.69667°N 117.85639°W﻿ / 44.69667; -117.85639﻿ (Shaw Stewart Ditch (Baker County, Oregon)) | Bowen Valley | 1126807 |
| Sheep Creek Siphon | Malheur | 2,516 ft (767 m) | 43°54′29″N 117°05′01″W﻿ / ﻿43.90806°N 117.08361°W﻿ / 43.90806; -117.08361﻿ (Sheep Creek Siphon (Malheur County, Oregon)) | Cairo | 1126821 |
| Sheep L Ditch | Harney | 4,436 ft (1,352 m) | 43°32′55″N 119°45′09″W﻿ / ﻿43.54861°N 119.75250°W﻿ / 43.54861; -119.75250﻿ (Sheep L Ditch (Harney County, Oregon)) | Potato Hills | 1129714 |
| Sheep Ridge Ditch | Wallowa | 3,609 ft (1,100 m) | 45°28′16″N 117°24′39″W﻿ / ﻿45.47111°N 117.41083°W﻿ / 45.47111; -117.41083﻿ (Sheep Ridge Ditch (Wallowa County, Oregon)) | Lostine | 1149335 |
| Shelton Ditch | Marion | 184 ft (56 m) | 44°55′33″N 123°00′34″W﻿ / ﻿44.92583°N 123.00944°W﻿ / 44.92583; -123.00944﻿ (Shelton Ditch (Marion County, Oregon)) | Salem West | 1163266 |
| Shoemaker Ditch | Wheeler | 3,514 ft (1,071 m) | 44°31′34″N 120°08′39″W﻿ / ﻿44.52611°N 120.14417°W﻿ / 44.52611; -120.14417﻿ (Shoemaker Ditch (Wheeler County, Oregon)) | Mitchell | 1158711 |
| Short Low Ditch | Umatilla | 584 ft (178 m) | 46°00′19″N 118°34′24″W﻿ / ﻿46.00528°N 118.57333°W﻿ / 46.00528; -118.57333﻿ (Short Low Ditch (Umatilla County, Oregon)) | Lowden | 1157399 |
| Sidney Ditch | Marion | 279 ft (85 m) | 44°44′02″N 122°57′53″W﻿ / ﻿44.73389°N 122.96472°W﻿ / 44.73389; -122.96472﻿ (Sidney Ditch (Marion County, Oregon)) | Crabtree | 1163271 |
| Sidney Power Ditch | Marion | 200 ft (61 m) | 44°46′57″N 123°04′16″W﻿ / ﻿44.78250°N 123.07111°W﻿ / 44.78250; -123.07111﻿ (Sidney Power Ditch (Marion County, Oregon)) | Sidney | 1126949 |
| Siegle Ditch | Baker | 2,320 ft (710 m) | 44°43′50″N 117°07′54″W﻿ / ﻿44.73056°N 117.13167°W﻿ / 44.73056; -117.13167﻿ (Siegle Ditch (Baker County, Oregon)) | Daly Creek | 1129562 |
| Silver Grange Ditch | Wallowa | 7,447 ft (2,270 m) | 45°22′01″N 117°21′57″W﻿ / ﻿45.36694°N 117.36583°W﻿ / 45.36694; -117.36583﻿ (Silver Grange Ditch (Wallowa County, Oregon)) | Chief Joseph Mountain | 1149497 |
| Silver L Canal | Lake | 4,439 ft (1,353 m) | 43°06′20″N 121°03′44″W﻿ / ﻿43.10556°N 121.06222°W﻿ / 43.10556; -121.06222﻿ (Silver L Canal (Lake County, Oregon)) | Hager Mountain | 1153864 |
| Silver Lake Ditch | Wallowa | 4,255 ft (1,297 m) | 45°21′16″N 117°08′25″W﻿ / ﻿45.35444°N 117.14028°W﻿ / 45.35444; -117.14028﻿ (Silver Lake Ditch (Wallowa County, Oregon)) | Joseph | 1149502 |
| Singer Drain | Malheur | 2,201 ft (671 m) | 43°42′43″N 117°04′36″W﻿ / ﻿43.71194°N 117.07667°W﻿ / 43.71194; -117.07667﻿ (Singer Drain (Malheur County, Oregon)) | Adrian | 1126999 |
| Sitz Ditch | Harney | 3,655 ft (1,114 m) | 43°50′10″N 118°29′04″W﻿ / ﻿43.83611°N 118.48444°W﻿ / 43.83611; -118.48444﻿ (Sitz Ditch (Harney County, Oregon)) | Drewsey | 1160500 |
| Skipanon Waterway | Clatsop | 7 ft (2.1 m) | 46°10′35″N 123°54′38″W﻿ / ﻿46.17639°N 123.91056°W﻿ / 46.17639; -123.91056﻿ (Skipanon Waterway (Clatsop County, Oregon)) | Warrenton | 1127030 |
| Skunk Farm Canal | Harney | 4,140 ft (1,260 m) | 43°05′25″N 118°50′11″W﻿ / ﻿43.09028°N 118.83639°W﻿ / 43.09028; -118.83639﻿ (Skunk Farm Canal (Harney County, Oregon)) | Diamond Swamp | 1127046 |
| Slide Ditch | Malheur | 2,100 ft (640 m) | 44°14′10″N 117°00′44″W﻿ / ﻿44.23611°N 117.01222°W﻿ / 44.23611; -117.01222﻿ (Slide Ditch (Malheur County, Oregon)) | Moores Hollow | 1131828 |
| Slusher Canal | Umatilla | 738 ft (225 m) | 45°40′54″N 119°05′39″W﻿ / ﻿45.68167°N 119.09417°W﻿ / 45.68167; -119.09417﻿ (Slusher Canal (Umatilla County, Oregon)) | Nolin | 1129670 |
| Smith Ditch | Morrow | 4,859 ft (1,481 m) | 45°09′55″N 119°19′22″W﻿ / ﻿45.16528°N 119.32278°W﻿ / 45.16528; -119.32278﻿ (Smith Ditch (Morrow County, Oregon)) | Arbuckle Mountain | 1149752 |
| Smith Ditch | Deschutes | 3,192 ft (973 m) | 44°17′24″N 121°33′04″W﻿ / ﻿44.29000°N 121.55111°W﻿ / 44.29000; -121.55111﻿ (Smith Ditch (Deschutes County, Oregon)) | Sisters | 1153105 |
| Smith Ditch | Crook | 3,363 ft (1,025 m) | 44°18′24″N 120°36′24″W﻿ / ﻿44.30667°N 120.60667°W﻿ / 44.30667; -120.60667﻿ (Smith Ditch (Crook County, Oregon)) | Cadle Butte | 1153127 |
| Smith Ditch | Baker | 3,615 ft (1,102 m) | 44°44′10″N 117°49′45″W﻿ / ﻿44.73611°N 117.82917°W﻿ / 44.73611; -117.82917﻿ (Smith Ditch (Baker County, Oregon)) | Bowen Valley | 1164135 |
| Smith McPhee Ditch | Baker | 3,330 ft (1,010 m) | 44°59′06″N 117°55′59″W﻿ / ﻿44.98500°N 117.93306°W﻿ / 44.98500; -117.93306﻿ (Smith McPhee Ditch (Baker County, Oregon)) | Haines | 1127128 |
| Snively Siphon | Malheur | 2,339 ft (713 m) | 43°43′00″N 117°10′59″W﻿ / ﻿43.71667°N 117.18306°W﻿ / 43.71667; -117.18306﻿ (Snively Siphon (Malheur County, Oregon)) | Owyhee Dam | 1131224 |
| Snow Creek Ditch | Deschutes | 3,898 ft (1,188 m) | 44°08′34″N 121°29′39″W﻿ / ﻿44.14278°N 121.49417°W﻿ / 44.14278; -121.49417﻿ (Snow Creek Ditch (Deschutes County, Oregon)) | Tumalo Dam | 1149814 |
| Sodom Ditch | Linn | 269 ft (82 m) | 44°26′52″N 123°03′22″W﻿ / ﻿44.44778°N 123.05611°W﻿ / 44.44778; -123.05611﻿ (Sodom Ditch (Linn County, Oregon)) | Halsey | 1127194 |
| South Alkali Drain | Malheur | 2,274 ft (693 m) | 43°43′03″N 117°02′25″W﻿ / ﻿43.71750°N 117.04028°W﻿ / 43.71750; -117.04028﻿ (South Alkali Drain (Malheur County, Oregon)) | Adrian | 1127227 |
| South Antelope Canal | Malheur | 4,262 ft (1,299 m) | 42°55′04″N 117°17′08″W﻿ / ﻿42.91778°N 117.28556°W﻿ / 42.91778; -117.28556﻿ (South Antelope Canal (Malheur County, Oregon)) | Danner | 1130454 |
| South Canal | Owyhee (ID) | 2,493 ft (760 m) | 43°31′42″N 116°57′47″W﻿ / ﻿43.52833°N 116.96306°W﻿ / 43.52833; -116.96306﻿ (South Canal (Owyhee County, Idaho)) | Homedale | 375136 |
| South Canal | Malheur | 2,543 ft (775 m) | 43°39′47″N 117°05′51″W﻿ / ﻿43.66306°N 117.09750°W﻿ / 43.66306; -117.09750﻿ (South Canal (Malheur County, Oregon)) | Adrian | 1127236 |
| South Canal | Lake | 4,783 ft (1,458 m) | 42°02′24″N 120°33′00″W﻿ / ﻿42.04000°N 120.55000°W﻿ / 42.04000; -120.55000﻿ (South Canal (Lake County, Oregon)) | Fitzwater Point | 1149908 |
| South Catherine Ditch | Union | 6,329 ft (1,929 m) | 45°05′44″N 117°30′47″W﻿ / ﻿45.09556°N 117.51306°W﻿ / 45.09556; -117.51306﻿ (South Catherine Ditch (Union County, Oregon)) | Flagstaff Butte | 1127237 |
| South Diamond Canal | Harney | 4,144 ft (1,263 m) | 43°01′38″N 118°47′28″W﻿ / ﻿43.02722°N 118.79111°W﻿ / 43.02722; -118.79111﻿ (South Diamond Canal (Harney County, Oregon)) | Diamond Swamp | 1127248 |
| South Ditch | Umatilla | 548 ft (167 m) | 45°59′50″N 118°38′38″W﻿ / ﻿45.99722°N 118.64389°W﻿ / 45.99722; -118.64389﻿ (South Ditch (Umatilla County, Oregon)) | Smeltz | 1158495 |
| South Dixie Ditch | Baker | 3,438 ft (1,048 m) | 44°26′35″N 117°28′34″W﻿ / ﻿44.44306°N 117.47611°W﻿ / 44.44306; -117.47611﻿ (South Dixie Ditch (Baker County, Oregon)) | Rye Valley | 1131840 |
| South Fork Canal | Jackson | 4,665 ft (1,422 m) | 42°18′29″N 122°22′14″W﻿ / ﻿42.30806°N 122.37056°W﻿ / 42.30806; -122.37056﻿ (South Fork Canal (Jackson County, Oregon)) | Brown Mountain | 1116638 |
| South Highline Canal | Josephine | 1,043 ft (318 m) | 42°24′44″N 123°19′04″W﻿ / ﻿42.41222°N 123.31778°W﻿ / 42.41222; -123.31778﻿ (South Highline Canal (Josephine County, Oregon)) | Grants Pass | 1135235 |
| South Main Canal | Josephine | 961 ft (293 m) | 42°25′04″N 123°19′04″W﻿ / ﻿42.41778°N 123.31778°W﻿ / 42.41778; -123.31778﻿ (South Main Canal (Josephine County, Oregon)) | Grants Pass | 1135236 |
| South Side Canal | Malheur | 4,029 ft (1,228 m) | 42°52′44″N 117°28′11″W﻿ / ﻿42.87889°N 117.46972°W﻿ / 42.87889; -117.46972﻿ (South Side Canal (Malheur County, Oregon)) | Threemile Hill | 1150080 |
| Southworth Ditch | Grant | 4,692 ft (1,430 m) | 44°09′20″N 118°57′19″W﻿ / ﻿44.15556°N 118.95528°W﻿ / 44.15556; -118.95528﻿ (Southworth Ditch (Grant County, Oregon)) | Seneca | 1152972 |
| Spence Ditch | Umatilla | 1,260 ft (380 m) | 45°54′09″N 118°20′34″W﻿ / ﻿45.90250°N 118.34278°W﻿ / 45.90250; -118.34278﻿ (Spence Ditch (Umatilla County, Oregon)) | Bowlus Hill | 1638733 |
| Spring Creek Ditch | Baker | 3,150 ft (960 m) | 44°50′25″N 117°12′39″W﻿ / ﻿44.84028°N 117.21083°W﻿ / 44.84028; -117.21083﻿ (Spring Creek Ditch (Baker County, Oregon)) | Richland | 1161770 |
| Springer Ditch | Wasco | 4,485 ft (1,367 m) | 45°21′04″N 121°27′26″W﻿ / ﻿45.35111°N 121.45722°W﻿ / 45.35111; -121.45722﻿ (Springer Ditch (Wasco County, Oregon)) | Flag Point | 1158502 |
| Stacey Ditch | Malheur | 2,336 ft (712 m) | 43°56′50″N 117°24′59″W﻿ / ﻿43.94722°N 117.41639°W﻿ / 43.94722; -117.41639﻿ (Stacey Ditch (Malheur County, Oregon)) | Vines Hill | 1129746 |
| Stallard Ditch | Harney | 3,570 ft (1,090 m) | 43°50′35″N 118°18′49″W﻿ / ﻿43.84306°N 118.31361°W﻿ / 43.84306; -118.31361﻿ (Stallard Ditch (Harney County, Oregon)) | Drinkwater Pass | 1160504 |
| Stanfield Branch Furnish Ditch | Umatilla | 653 ft (199 m) | 45°48′08″N 119°10′56″W﻿ / ﻿45.80222°N 119.18222°W﻿ / 45.80222; -119.18222﻿ (Stanfield Branch Furnish Ditch (Umatilla County, Oregon)) | Stanfield | 1127526 |
| Stanfield Drain | Umatilla | 623 ft (190 m) | 45°47′19″N 119°10′49″W﻿ / ﻿45.78861°N 119.18028°W﻿ / 45.78861; -119.18028﻿ (Stanfield Drain (Umatilla County, Oregon)) | Stanfield | 1129797 |
| Star Creek Ditch | Malheur | 4,905 ft (1,495 m) | 43°25′45″N 117°56′51″W﻿ / ﻿43.42917°N 117.94750°W﻿ / 43.42917; -117.94750﻿ (Star Creek Ditch (Malheur County, Oregon)) | Star Creek Reservoir | 1164027 |
| State Ditch | Union | 2,684 ft (818 m) | 45°23′25″N 117°55′51″W﻿ / ﻿45.39028°N 117.93083°W﻿ / 45.39028; -117.93083﻿ (State Ditch (Union County, Oregon)) | Imbler | 1150363 |
| Stearns Ditch | Crook | 2,907 ft (886 m) | 44°13′19″N 120°52′29″W﻿ / ﻿44.22194°N 120.87472°W﻿ / 44.22194; -120.87472﻿ (Stearns Ditch (Crook County, Oregon)) | Stearns Butte | 1130932 |
| Sterling Ditch | Jackson | 2,477 ft (755 m) | 42°11′53″N 122°56′49″W﻿ / ﻿42.19806°N 122.94694°W﻿ / 42.19806; -122.94694﻿ (Sterling Ditch (Jackson County, Oregon)) | Sterling Creek | 1150410 |
| Steward Ditch | Baker | 3,107 ft (947 m) | 44°52′20″N 117°29′04″W﻿ / ﻿44.87222°N 117.48444°W﻿ / 44.87222; -117.48444﻿ (Steward Ditch (Baker County, Oregon)) | Glasgow Butte | 1129433 |
| Steward Ditch | Grant | 2,480 ft (760 m) | 44°27′35″N 119°25′34″W﻿ / ﻿44.45972°N 119.42611°W﻿ / 44.45972; -119.42611﻿ (Steward Ditch (Grant County, Oregon)) | Aldrich Mountain North | 1153956 |
| Stewart Carter Ditch | Malheur | 2,178 ft (664 m) | 44°01′03″N 116°59′30″W﻿ / ﻿44.01750°N 116.99167°W﻿ / 44.01750; -116.99167﻿ (Stewart Carter Ditch (Malheur County, Oregon)) | Payette | 1127597 |
| Stewart Ditch | Grant | 2,480 ft (760 m) | 44°27′35″N 119°25′34″W﻿ / ﻿44.45972°N 119.42611°W﻿ / 44.45972; -119.42611﻿ (Stewart Ditch (Grant County, Oregon)) | Aldrich Mountain North | 1161631 |
| Stock Ditch | Lake | 4,308 ft (1,313 m) | 42°39′35″N 120°28′37″W﻿ / ﻿42.65972°N 120.47694°W﻿ / 42.65972; -120.47694﻿ (Stock Ditch (Lake County, Oregon)) | Coglan Buttes | 1127618 |
| Stockwater Ditch | Harney | 4,550 ft (1,390 m) | 42°24′45″N 118°55′14″W﻿ / ﻿42.41250°N 118.92056°W﻿ / 42.41250; -118.92056﻿ (Stockwater Ditch (Harney County, Oregon)) | Garrison Lake | 1129759 |
| Stradley Drain | Malheur | 2,260 ft (690 m) | 43°41′48″N 117°03′52″W﻿ / ﻿43.69667°N 117.06444°W﻿ / 43.69667; -117.06444﻿ (Stradley Drain (Malheur County, Oregon)) | Adrian | 1127646 |
| Strode Ditch | Malheur | 3,862 ft (1,177 m) | 43°18′05″N 117°04′02″W﻿ / ﻿43.30139°N 117.06722°W﻿ / 43.30139; -117.06722﻿ (Strode Ditch (Malheur County, Oregon)) | Rockville | 1130436 |
| Stubblefield Canal | Harney | 4,117 ft (1,255 m) | 43°11′28″N 118°56′36″W﻿ / ﻿43.19111°N 118.94333°W﻿ / 43.19111; -118.94333﻿ (Stubblefield Canal (Harney County, Oregon)) | Coyote Buttes | 1127668 |
| Succor Creek Siphon | Malheur | 2,523 ft (769 m) | 43°35′10″N 117°04′24″W﻿ / ﻿43.58611°N 117.07333°W﻿ / 43.58611; -117.07333﻿ (Succor Creek Siphon (Malheur County, Oregon)) | Graveyard Point | 1131220 |
| Summer Lake I D Canal | Lake | 4,275 ft (1,303 m) | 42°56′40″N 120°47′49″W﻿ / ﻿42.94444°N 120.79694°W﻿ / 42.94444; -120.79694﻿ (Summer Lake I D Canal (Lake County, Oregon)) | Summer Lake | 1153851 |
| Sunnyslope Ditch | Union | 3,317 ft (1,011 m) | 45°03′18″N 117°55′26″W﻿ / ﻿45.05500°N 117.92389°W﻿ / 45.05500; -117.92389﻿ (Sunnyslope Ditch (Union County, Oregon)) | North Powder | 1127736 |
| Swalley Canal | Deschutes | 3,438 ft (1,048 m) | 44°06′46″N 121°17′18″W﻿ / ﻿44.11278°N 121.28833°W﻿ / 44.11278; -121.28833﻿ (Swalley Canal (Deschutes County, Oregon)) | Bend | 1150727 |
| Swayne Ditch | Jackson | 1,591 ft (485 m) | 42°08′49″N 123°03′24″W﻿ / ﻿42.14694°N 123.05667°W﻿ / 42.14694; -123.05667﻿ (Swayne Ditch (Jackson County, Oregon)) | Ruch | 1155054 |
| Swinger Ditch | Baker | 3,405 ft (1,038 m) | 44°54′50″N 117°52′20″W﻿ / ﻿44.91389°N 117.87222°W﻿ / 44.91389; -117.87222﻿ (Swinger Ditch (Baker County, Oregon)) | Magpie Peak | 1150788 |
| T Canal | Klamath | 4,137 ft (1,261 m) | 42°02′35″N 121°23′57″W﻿ / ﻿42.04306°N 121.39917°W﻿ / 42.04306; -121.39917﻿ (T Canal (Klamath County, Oregon)) | Malin | 1127851 |
| T Canal | Umatilla | 472 ft (144 m) | 45°53′34″N 119°14′38″W﻿ / ﻿45.89278°N 119.24389°W﻿ / 45.89278; -119.24389﻿ (T Canal (Umatilla County, Oregon)) | Hat Rock | 1127852 |
| Table Rock Canal | Jackson | 1,217 ft (371 m) | 42°27′19″N 122°54′39″W﻿ / ﻿42.45528°N 122.91083°W﻿ / 42.45528; -122.91083﻿ (Table Rock Canal (Jackson County, Oregon)) | Sams Valley | 1134762 |
| Talent Lateral | Jackson | 1,719 ft (524 m) | 42°16′13″N 122°51′58″W﻿ / ﻿42.27028°N 122.86611°W﻿ / 42.27028; -122.86611﻿ (Talent Lateral (Jackson County, Oregon)) | Medford East | 1161540 |
| Talent Middle Canal | Jackson | 1,696 ft (517 m) | 42°15′29″N 122°50′01″W﻿ / ﻿42.25806°N 122.83361°W﻿ / 42.25806; -122.83361﻿ (Talent Middle Canal (Jackson County, Oregon)) | Medford East | 1134787 |
| Taylor Ditch | Baker | 4,281 ft (1,305 m) | 44°40′25″N 117°24′59″W﻿ / ﻿44.67361°N 117.41639°W﻿ / 44.67361; -117.41639﻿ (Taylor Ditch (Baker County, Oregon)) | Lawrence Creek | 1129440 |
| Taylor Ditch | Umatilla | 682 ft (208 m) | 45°42′49″N 119°10′34″W﻿ / ﻿45.71361°N 119.17611°W﻿ / 45.71361; -119.17611﻿ (Taylor Ditch (Umatilla County, Oregon)) | Echo | 1129888 |
| The Drain | Josephine | 876 ft (267 m) | 42°25′47″N 123°25′34″W﻿ / ﻿42.42972°N 123.42611°W﻿ / 42.42972; -123.42611﻿ (The Drain (Josephine County, Oregon)) | Wilderville | 1135455 |
| The Mill Ditch | Grant | 3,609 ft (1,100 m) | 44°26′54″N 118°42′20″W﻿ / ﻿44.44833°N 118.70556°W﻿ / 44.44833; -118.70556﻿ (The Mill Ditch (Grant County, Oregon)) | Prairie City | 1151026 |
| Thompson Ditch | Baker | 4,003 ft (1,220 m) | 44°31′42″N 118°13′41″W﻿ / ﻿44.52833°N 118.22806°W﻿ / 44.52833; -118.22806﻿ (Thompson Ditch (Baker County, Oregon)) | Unity Reservoir | 1153984 |
| Three Sisters Canal | Deschutes | 2,818 ft (859 m) | 44°20′18″N 121°23′27″W﻿ / ﻿44.33833°N 121.39083°W﻿ / 44.33833; -121.39083﻿ (Three Sisters Canal (Deschutes County, Oregon)) | Henkle Butte | 1150262 |
| Threemile Ditch | Wasco | 2,090 ft (640 m) | 45°14′11″N 121°19′49″W﻿ / ﻿45.23639°N 121.33028°W﻿ / 45.23639; -121.33028﻿ (Threemile Ditch (Wasco County, Oregon)) | Wamic | 1151192 |
| Throop Ditch | Grant | 2,342 ft (714 m) | 44°28′42″N 119°31′59″W﻿ / ﻿44.47833°N 119.53306°W﻿ / 44.47833; -119.53306﻿ (Throop Ditch (Grant County, Oregon)) | Dayville | 1153768 |
| Tiger Ditch | Baker | 3,996 ft (1,218 m) | 44°28′30″N 118°13′59″W﻿ / ﻿44.47500°N 118.23306°W﻿ / 44.47500; -118.23306﻿ (Tiger Ditch (Baker County, Oregon)) | Unity | 1153978 |
| Tobin Ditch | Baker | 2,612 ft (796 m) | 44°49′11″N 117°12′27″W﻿ / ﻿44.81972°N 117.20750°W﻿ / 44.81972; -117.20750﻿ (Tobin Ditch (Baker County, Oregon)) | Richland | 1151291 |
| Tokay Canal | Josephine | 1,109 ft (338 m) | 42°26′34″N 123°18′04″W﻿ / ﻿42.44278°N 123.30111°W﻿ / 42.44278; -123.30111﻿ (Tokay Canal (Josephine County, Oregon)) | Grants Pass | 1135239 |
| Townsite Ditch | Malheur | 3,002 ft (915 m) | 43°44′43″N 118°05′38″W﻿ / ﻿43.74528°N 118.09389°W﻿ / 43.74528; -118.09389﻿ (Townsite Ditch (Malheur County, Oregon)) | Juntura | 1128180 |
| Travillion-Koester ditch | Baker | 3,255 ft (992 m) | 45°00′00″N 117°52′51″W﻿ / ﻿45.00000°N 117.88083°W﻿ / 45.00000; -117.88083﻿ (Travillion-Koester ditch (Baker County, Oregon)) | North Powder | 1131533 |
| Trout Creek | Union | 6,237 ft (1,901 m) | 45°04′52″N 117°30′34″W﻿ / ﻿45.08111°N 117.50944°W﻿ / 45.08111; -117.50944﻿ (Trout Creek (Union County, Oregon)) | Flagstaff Butte | 1128236 |
| Trowbridge Ditch | Grant | 3,120 ft (950 m) | 44°25′28″N 118°56′54″W﻿ / ﻿44.42444°N 118.94833°W﻿ / 44.42444; -118.94833﻿ (Trowbridge Ditch (Grant County, Oregon)) | John Day | 1638244 |
| Tudor Ditch | Malheur | 3,924 ft (1,196 m) | 42°41′25″N 117°54′34″W﻿ / ﻿42.69028°N 117.90944°W﻿ / 42.69028; -117.90944﻿ (Tudor Ditch (Malheur County, Oregon)) | Flat Top Mountain | 1130448 |
| Tumalo Canal | Deschutes | 3,327 ft (1,014 m) | 44°11′10″N 121°22′38″W﻿ / ﻿44.18611°N 121.37722°W﻿ / 44.18611; -121.37722﻿ (Tumalo Canal (Deschutes County, Oregon)) | Tumalo Dam | 1151489 |
| Tumalo Feed Canal | Deschutes | 3,537 ft (1,078 m) | 44°07′06″N 121°22′59″W﻿ / ﻿44.11833°N 121.38306°W﻿ / 44.11833; -121.38306﻿ (Tumalo Feed Canal (Deschutes County, Oregon)) | Shevlin Park | 1151494 |
| Tunnel Millrace | Lane | 561 ft (171 m) | 43°53′21″N 123°00′43″W﻿ / ﻿43.88917°N 123.01194°W﻿ / 43.88917; -123.01194﻿ (Tunnel Millrace (Lane County, Oregon)) | Creswell | 1128299 |
| U S B Line Canal | Umatilla | 676 ft (206 m) | 45°47′59″N 119°14′49″W﻿ / ﻿45.79972°N 119.24694°W﻿ / 45.79972; -119.24694﻿ (U S B Line Canal (Umatilla County, Oregon)) | Stanfield | 1129811 |
| Umatilla Drain | Umatilla | 440 ft (130 m) | 45°53′59″N 119°18′02″W﻿ / ﻿45.89972°N 119.30056°W﻿ / 45.89972; -119.30056﻿ (Umatilla Drain (Umatilla County, Oregon)) | Umatilla | 1128401 |
| Uncle Tom Slough | Columbia | 13 ft (4.0 m) | 46°07′19″N 123°15′54″W﻿ / ﻿46.12194°N 123.26500°W﻿ / 46.12194; -123.26500﻿ (Uncle Tom Slough (Columbia County, Oregon)) | Marshland | 1132301 |
| Upper Ditch | Malheur | 2,205 ft (672 m) | 44°10′39″N 116°59′03″W﻿ / ﻿44.17750°N 116.98417°W﻿ / 44.17750; -116.98417﻿ (Upper Ditch (Malheur County, Oregon)) | Weiser South | 1128445 |
| Upper Fisher Long Ditch | Baker | 3,691 ft (1,125 m) | 44°55′19″N 118°02′04″W﻿ / ﻿44.92194°N 118.03444°W﻿ / 44.92194; -118.03444﻿ (Upper Fisher Long Ditch (Baker County, Oregon)) | Rock Creek | 1128450 |
| Upper Hanley Canal | Harney | 4,140 ft (1,260 m) | 43°34′03″N 118°58′05″W﻿ / ﻿43.56750°N 118.96806°W﻿ / 43.56750; -118.96806﻿ (Upper Hanley Canal (Harney County, Oregon)) | Poison Creek Slough | 1128454 |
| Upper Pump Canal | Malheur | 2,264 ft (690 m) | 43°58′30″N 117°08′54″W﻿ / ﻿43.97500°N 117.14833°W﻿ / 43.97500; -117.14833﻿ (Upper Pump Canal (Malheur County, Oregon)) | Vale East | 1164024 |
| Upper West Lateral | Jackson | 2,172 ft (662 m) | 42°12′52″N 122°48′19″W﻿ / ﻿42.21444°N 122.80528°W﻿ / 42.21444; -122.80528﻿ (Upper West Lateral (Jackson County, Oregon)) | Talent | 1151710 |
| Upton Lateral | Jackson | 1,286 ft (392 m) | 42°23′29″N 122°53′22″W﻿ / ﻿42.39139°N 122.88944°W﻿ / 42.39139; -122.88944﻿ (Upton Lateral (Jackson County, Oregon)) | Sams Valley | 1134759 |
| Urlezaga Ditch | Malheur | 4,324 ft (1,318 m) | 42°59′22″N 117°09′04″W﻿ / ﻿42.98944°N 117.15111°W﻿ / 42.98944; -117.15111﻿ (Urlezaga Ditch (Malheur County, Oregon)) | Antelope Reservoir | 1130452 |
| V Canal | Klamath | 4,170 ft (1,270 m) | 42°03′39″N 121°25′24″W﻿ / ﻿42.06083°N 121.42333°W﻿ / 42.06083; -121.42333﻿ (V Canal (Klamath County, Oregon)) | Malin | 1128490 |
| Vale Oregon Canal | Malheur | 2,569 ft (783 m) | 43°59′41″N 117°19′42″W﻿ / ﻿43.99472°N 117.32833°W﻿ / 43.99472; -117.32833﻿ (Vale Oregon Canal (Malheur County, Oregon)) | Vale West | 1639340 |
| Valley View Drain | Malheur | 2,182 ft (665 m) | 43°58′20″N 116°59′44″W﻿ / ﻿43.97222°N 116.99556°W﻿ / 43.97222; -116.99556﻿ (Valley View Drain (Malheur County, Oregon)) | Nyssa | 1163881 |
| Van Brimmer Canal | Klamath | 4,081 ft (1,244 m) | 42°00′06″N 121°36′05″W﻿ / ﻿42.00167°N 121.60139°W﻿ / 42.00167; -121.60139﻿ (Van Brimmer Canal (Klamath County, Oregon)) | Merrill | 1128501 |
| Vines Ditch | Malheur | 2,365 ft (721 m) | 43°56′19″N 117°26′32″W﻿ / ﻿43.93861°N 117.44222°W﻿ / 43.93861; -117.44222﻿ (Vines Ditch (Malheur County, Oregon)) | Vines Hill | 1128543 |
| Visher Feed Canal | Malheur | 3,612 ft (1,101 m) | 43°26′00″N 118°11′24″W﻿ / ﻿43.43333°N 118.19000°W﻿ / 43.43333; -118.19000﻿ (Visher Feed Canal (Malheur County, Oregon)) | McEwen Butte | 1131823 |
| Volmer Ditch | Hood River | 2,723 ft (830 m) | 45°28′27″N 121°37′14″W﻿ / ﻿45.47417°N 121.62056°W﻿ / 45.47417; -121.62056﻿ (Volmer Ditch (Hood River County, Oregon)) | Dog River | 1154331 |
| Vroman Ditch | Jackson | 1,148 ft (350 m) | 42°31′49″N 123°09′24″W﻿ / ﻿42.53028°N 123.15667°W﻿ / 42.53028; -123.15667﻿ (Vroman Ditch (Jackson County, Oregon)) | Wimer | 1135415 |
| W A Lateral | Klamath | 4,278 ft (1,304 m) | 43°36′47″N 121°33′49″W﻿ / ﻿43.61306°N 121.56361°W﻿ / 43.61306; -121.56361﻿ (W A Lateral (Klamath County, Oregon)) | Masten Butte | 1153037 |
| W R Lateral | Deschutes | 4,272 ft (1,302 m) | 43°36′49″N 121°32′54″W﻿ / ﻿43.61361°N 121.54833°W﻿ / 43.61361; -121.54833﻿ (W R Lateral (Deschutes County, Oregon)) | Masten Butte | 1153036 |
| Wade Ditch | Wallowa | 3,438 ft (1,048 m) | 45°28′27″N 117°22′55″W﻿ / ﻿45.47417°N 117.38194°W﻿ / 45.47417; -117.38194﻿ (Wade Ditch (Wallowa County, Oregon)) | Lostine | 1151795 |
| Walker Basin Canal | Klamath | 4,288 ft (1,307 m) | 43°35′29″N 121°34′09″W﻿ / ﻿43.59139°N 121.56917°W﻿ / 43.59139; -121.56917﻿ (Walker Basin Canal (Klamath County, Oregon)) | Masten Butte | 1153038 |
| Walker Ditch | Marion | 135 ft (41 m) | 45°04′02″N 122°49′34″W﻿ / ﻿45.06722°N 122.82611°W﻿ / 45.06722; -122.82611﻿ (Walker Ditch (Marion County, Oregon)) | Silverton | 1161027 |
| Walker Drain | Malheur | 2,244 ft (684 m) | 43°40′58″N 117°04′00″W﻿ / ﻿43.68278°N 117.06667°W﻿ / 43.68278; -117.06667﻿ (Walker Drain (Malheur County, Oregon)) | Adrian | 1128592 |
| Wallowa Valley Improvement Canal | Wallowa | 4,934 ft (1,504 m) | 45°18′10″N 117°06′32″W﻿ / ﻿45.30278°N 117.10889°W﻿ / 45.30278; -117.10889﻿ (Wallowa Valley Improvement Canal (Wallowa County, Oregon)) | Kinney Lake | 1151866 |
| Walterville Canal | Lane | 551 ft (168 m) | 44°04′04″N 122°50′28″W﻿ / ﻿44.06778°N 122.84111°W﻿ / 44.06778; -122.84111﻿ (Walterville Canal (Lane County, Oregon)) | Walterville | 1128621 |
| Wapinitia Canal | Wasco | 1,923 ft (586 m) | 45°09′14″N 121°13′09″W﻿ / ﻿45.15389°N 121.21917°W﻿ / 45.15389; -121.21917﻿ (Wapinitia Canal (Wasco County, Oregon)) | Tygh Valley | 1153136 |
| Ward Drain | Malheur | 2,182 ft (665 m) | 43°52′05″N 117°00′19″W﻿ / ﻿43.86806°N 117.00528°W﻿ / 43.86806; -117.00528﻿ (Ward Drain (Malheur County, Oregon)) | Owyhee | 1166866 |
| Warm Springs Canal | Harney | 4,183 ft (1,275 m) | 42°50′39″N 118°54′54″W﻿ / ﻿42.84417°N 118.91500°W﻿ / 42.84417; -118.91500﻿ (Warm Springs Canal (Harney County, Oregon)) | Frenchglen | 1128651 |
| Warm Springs Pump Canal | Malheur | 2,313 ft (705 m) | 44°02′08″N 117°16′21″W﻿ / ﻿44.03556°N 117.27250°W﻿ / 44.03556; -117.27250﻿ (Warm Springs Pump Canal (Malheur County, Oregon)) | Willowcreek | 1166718 |
| Waterbury Ditch | Baker | 2,444 ft (745 m) | 44°47′55″N 117°12′00″W﻿ / ﻿44.79861°N 117.20000°W﻿ / 44.79861; -117.20000﻿ (Waterbury Ditch (Baker County, Oregon)) | Richland | 1151942 |
| Watts and Topping Ditch | Josephine | 1,191 ft (363 m) | 42°17′24″N 123°14′36″W﻿ / ﻿42.29000°N 123.24333°W﻿ / 42.29000; -123.24333﻿ (Watts and Topping Ditch (Josephine County, Oregon)) | Applegate | 1135261 |
| Weatherspoon Ditch | Baker | 4,764 ft (1,452 m) | 45°40′00″N 117°16′44″W﻿ / ﻿45.66667°N 117.27889°W﻿ / 45.66667; -117.27889﻿ (Weatherspoon Ditch (Baker County, Oregon)) | Sled Springs | 1129537 |
| Welch Drain | Malheur | 2,211 ft (674 m) | 43°41′29″N 117°03′01″W﻿ / ﻿43.69139°N 117.05028°W﻿ / 43.69139; -117.05028﻿ (Welch Drain (Malheur County, Oregon)) | Adrian | 1128781 |
| Wendt Ditch | Baker | 3,402 ft (1,037 m) | 44°29′12″N 117°43′56″W﻿ / ﻿44.48667°N 117.73222°W﻿ / 44.48667; -117.73222﻿ (Wendt Ditch (Baker County, Oregon)) | Bridgeport | 1128802 |
| West Canal | Klamath | 4,150 ft (1,260 m) | 42°04′48″N 121°15′23″W﻿ / ﻿42.08000°N 121.25639°W﻿ / 42.08000; -121.25639﻿ (West Canal (Klamath County, Oregon)) | Bryant Mountain | 1128815 |
| West Canal | Klamath | 4,098 ft (1,249 m) | 42°01′25″N 121°51′24″W﻿ / ﻿42.02361°N 121.85667°W﻿ / 42.02361; -121.85667﻿ (West Canal (Klamath County, Oregon)) | Worden | 1162439 |
| West Extension Irrigation Canal | Morrow | 397 ft (121 m) | 45°54′04″N 119°25′55″W﻿ / ﻿45.90111°N 119.43194°W﻿ / 45.90111; -119.43194﻿ (West Extension Irrigation Canal (Morrow County, Oregon)) | Irrigon | 1128829 |
| West Lateral | Jackson | 1,985 ft (605 m) | 42°14′27″N 122°49′18″W﻿ / ﻿42.24083°N 122.82167°W﻿ / 42.24083; -122.82167﻿ (West Lateral (Jackson County, Oregon)) | Talent | 1152132 |
| West Side Ditch | Grant | 4,554 ft (1,388 m) | 43°58′10″N 118°57′19″W﻿ / ﻿43.96944°N 118.95528°W﻿ / 43.96944; -118.95528﻿ (West Side Ditch (Grant County, Oregon)) | Trout Creek | 1154246 |
| Westland A Canal | Umatilla | 561 ft (171 m) | 45°51′24″N 119°21′19″W﻿ / ﻿45.85667°N 119.35528°W﻿ / 45.85667; -119.35528﻿ (Westland A Canal (Umatilla County, Oregon)) | Hermiston | 1129833 |
| Westland F Canal | Umatilla | 535 ft (163 m) | 45°50′19″N 119°21′29″W﻿ / ﻿45.83861°N 119.35806°W﻿ / 45.83861; -119.35806﻿ (Westland F Canal (Umatilla County, Oregon)) | Hermiston | 1129832 |
| Westside Ditch | Wallowa | 3,625 ft (1,105 m) | 45°28′50″N 117°26′54″W﻿ / ﻿45.48056°N 117.44833°W﻿ / 45.48056; -117.44833﻿ (Westside Ditch (Wallowa County, Oregon)) | Lostine | 1152160 |
| Wham Whited Ditch | Baker | 3,911 ft (1,192 m) | 44°29′30″N 118°12′44″W﻿ / ﻿44.49167°N 118.21222°W﻿ / 44.49167; -118.21222﻿ (Wham Whited Ditch (Baker County, Oregon)) | Unity | 1153979 |
| Whitby Ditch | Benton | 249 ft (76 m) | 44°28′16″N 123°18′23″W﻿ / ﻿44.47111°N 123.30639°W﻿ / 44.47111; -123.30639﻿ (Whitby Ditch (Benton County, Oregon)) | Greenberry | 1136901 |
| White Ditch | Umatilla | 640 ft (200 m) | 45°58′13″N 118°34′01″W﻿ / ﻿45.97028°N 118.56694°W﻿ / 45.97028; -118.56694﻿ (White Ditch (Umatilla County, Oregon)) | Waterman | 1128977 |
| Whiteline Ditch | Klamath | 4,426 ft (1,349 m) | 42°19′55″N 121°44′19″W﻿ / ﻿42.33194°N 121.73861°W﻿ / 42.33194; -121.73861﻿ (Whiteline Ditch (Klamath County, Oregon)) | Whiteline Reservoir | 1132655 |
| Wilcox Ditch | Lake | 4,951 ft (1,509 m) | 42°15′25″N 120°21′04″W﻿ / ﻿42.25694°N 120.35111°W﻿ / 42.25694; -120.35111﻿ (Wilcox Ditch (Lake County, Oregon)) | Crooked Creek Valley | 1130999 |
| Wilcox Ditch | Baker | 3,976 ft (1,212 m) | 44°54′21″N 118°02′48″W﻿ / ﻿44.90583°N 118.04667°W﻿ / 44.90583; -118.04667﻿ (Wilcox Ditch (Baker County, Oregon)) | Rock Creek | 1158553 |
| Willamette Falls Locks and Canal | Clackamas | 10 ft (3.0 m) | 45°21′18″N 122°37′3.47″W﻿ / ﻿45.35500°N 122.6176306°W﻿ / 45.35500; -122.6176306﻿ (Willamette Falls Locks and Canal) | | |
| Willams Ditch | Harney | 3,530 ft (1,080 m) | 43°48′10″N 118°19′54″W﻿ / ﻿43.80278°N 118.33167°W﻿ / 43.80278; -118.33167﻿ (Willams Ditch (Harney County, Oregon)) | Drinkwater Pass | 1132009 |
| Williams Ditch | Baker | 3,976 ft (1,212 m) | 44°50′55″N 118°00′34″W﻿ / ﻿44.84861°N 118.00944°W﻿ / 44.84861; -118.00944﻿ (Williams Ditch (Baker County, Oregon)) | Elkhorn Peak | 1129117 |
| Williams Ditch | Baker | 3,504 ft (1,068 m) | 44°57′10″N 118°01′07″W﻿ / ﻿44.95278°N 118.01861°W﻿ / 44.95278; -118.01861﻿ (Williams Ditch (Baker County, Oregon)) | Rock Creek | 1129118 |
| Williams Ditch | Baker | 4,491 ft (1,369 m) | 44°22′49″N 118°09′54″W﻿ / ﻿44.38028°N 118.16500°W﻿ / 44.38028; -118.16500﻿ (Williams Ditch (Baker County, Oregon)) | Unity | 1152389 |
| Williams Drain | Klamath | 4,331 ft (1,320 m) | 42°25′05″N 121°21′24″W﻿ / ﻿42.41806°N 121.35667°W﻿ / 42.41806; -121.35667﻿ (Williams Drain (Klamath County, Oregon)) | Beatty | 1155315 |
| Williams and Whalen Ditch | Jackson | 1,207 ft (368 m) | 42°32′59″N 123°07′33″W﻿ / ﻿42.54972°N 123.12583°W﻿ / 42.54972; -123.12583﻿ (Williams and Whalen Ditch (Jackson County, Oregon)) | McConville Peak | 1135409 |
| Williamson River Ditch | Klamath | 4,554 ft (1,388 m) | 42°59′24″N 121°31′29″W﻿ / ﻿42.99000°N 121.52472°W﻿ / 42.99000; -121.52472﻿ (Williamson River Ditch (Klamath County, Oregon)) | Wildhorse Ridge | 1155412 |
| Willow Valley Canal | Klamath | 4,423 ft (1,348 m) | 42°00′50″N 121°08′34″W﻿ / ﻿42.01389°N 121.14278°W﻿ / 42.01389; -121.14278﻿ (Willow Valley Canal (Klamath County, Oregon)) | Langell Valley | 1133113 |
| Wilson Ditch | Lake | 4,885 ft (1,489 m) | 42°19′20″N 120°22′26″W﻿ / ﻿42.32222°N 120.37389°W﻿ / 42.32222; -120.37389﻿ (Wilson Ditch (Lake County, Oregon)) | Crooked Creek Valley | 1130995 |
| Wocus Drainage Canal | Klamath | 4,131 ft (1,259 m) | 42°14′54″N 121°54′19″W﻿ / ﻿42.24833°N 121.90528°W﻿ / 42.24833; -121.90528﻿ (Wocus Drainage Canal (Klamath County, Oregon)) | Keno | 1161598 |
| Wolf Run Ditch | Wasco | 2,913 ft (888 m) | 45°24′59″N 121°20′47″W﻿ / ﻿45.41639°N 121.34639°W﻿ / 45.41639; -121.34639﻿ (Wolf Run Ditch (Wasco County, Oregon)) | Wolf Run | 1152602 |
| Wood River Canal | Klamath | 4,144 ft (1,263 m) | 42°37′39″N 121°58′28″W﻿ / ﻿42.62750°N 121.97444°W﻿ / 42.62750; -121.97444﻿ (Wood River Canal (Klamath County, Oregon)) | Fort Klamath | 1134239 |
| Wrenn Dobbin Ditch | Wallowa | 4,117 ft (1,255 m) | 45°22′02″N 117°12′25″W﻿ / ﻿45.36722°N 117.20694°W﻿ / 45.36722; -117.20694﻿ (Wrenn Dobbin Ditch (Wallowa County, Oregon)) | Joseph | 1152658 |
| Wright Ditch | Union | 3,330 ft (1,010 m) | 45°00′46″N 117°39′06″W﻿ / ﻿45.01278°N 117.65167°W﻿ / 45.01278; -117.65167﻿ (Wright Ditch (Union County, Oregon)) | Medical Springs | 1131547 |
| Y J Canal | Klamath | 4,531 ft (1,381 m) | 42°57′29″N 121°35′54″W﻿ / ﻿42.95806°N 121.59833°W﻿ / 42.95806; -121.59833﻿ (Y J Canal (Klamath County, Oregon)) | Wildhorse Ridge | 1154999 |
| Yamsay Land and Cattle Company Ditch | Klamath | 4,531 ft (1,381 m) | 42°51′24″N 121°48′34″W﻿ / ﻿42.85667°N 121.80944°W﻿ / 42.85667; -121.80944﻿ (Yamsay Land and Cattle Company Ditch (Klamath County, Oregon)) | Fuego | 1154991 |
| Yankee Creek Siphon | Jackson | 1,542 ft (470 m) | 42°25′14″N 122°44′16″W﻿ / ﻿42.42056°N 122.73778°W﻿ / 42.42056; -122.73778﻿ (Yankee Creek Siphon (Jackson County, Oregon)) | Brownsboro | 1129353 |
| Yonna Ditch | Klamath | 4,153 ft (1,266 m) | 42°13′29″N 121°26′52″W﻿ / ﻿42.22472°N 121.44778°W﻿ / 42.22472; -121.44778﻿ (Yonna Ditch (Klamath County, Oregon)) | Bonanza | 1152741 |
| Young Ditch | Malheur | 3,734 ft (1,138 m) | 44°20′10″N 117°56′34″W﻿ / ﻿44.33611°N 117.94278°W﻿ / 44.33611; -117.94278﻿ (Young Ditch (Malheur County, Oregon)) | Ironside | 1131942 |
| Z Canal | Umatilla | 535 ft (163 m) | 45°52′10″N 119°16′58″W﻿ / ﻿45.86944°N 119.28278°W﻿ / 45.86944; -119.28278﻿ (Z Canal (Umatilla County, Oregon)) | Hermiston | 1129405 |
| ZX Brattain Ditch | Lake | 4,314 ft (1,315 m) | 42°38′43″N 120°30′39″W﻿ / ﻿42.64528°N 120.51083°W﻿ / 42.64528; -120.51083﻿ (ZX Brattain Ditch (Lake County, Oregon)) | Paisley | 1152790 |
| Zell Ditch | Umatilla | 1,161 ft (354 m) | 45°54′41″N 118°22′01″W﻿ / ﻿45.91139°N 118.36694°W﻿ / 45.91139; -118.36694﻿ (Zell Ditch (Umatilla County, Oregon)) | Bowlus Hill | 1638734 |
| Zimmerman Ditch | Malheur | 3,947 ft (1,203 m) | 42°58′05″N 117°39′34″W﻿ / ﻿42.96806°N 117.65944°W﻿ / 42.96806; -117.65944﻿ (Zimmerman Ditch (Malheur County, Oregon)) | Owyhee Butte | 1131801 |