| River | Description | Organization |
| Athena Spring | at water tank off Kee's Cemetary Rd; TMDL Project UMA150 | UBWC |
| Buckaroo Creek | upstream ~0.85 miles from confluence at washed-out bridge below ISCO | CTUIR |
| Buckaroo Creek | upstream of cabin/fence; ISCO site; WQ site UIR133 | CTUIR |
| Buckaroo Creek | upstream of UPRR bridge; WQ site UIR101 | CTUIR |
| City of Pendleton Spring Line | below water line gate house & weir off Cayuse Rd | CTUIR |
| Coonskin Creek | at Cayuse Road; RM 0.2; Temperature site; WQ site UIR102 | CTUIR |
| Cottonwood Creek | downstream of Cayuse Road; WQ site UIR103 | CTUIR |
| Coyote Creek (North) | at So. Market Rd; south of Tias/Conner Rd; Metals 2009; M04 | CTUIR |
| Coyote Creek (South) | above Diggins barn below project culvert (Upper) | CTUIR |
| Coyote Creek (South) | at RU11, Diggins Range Unit 11 | CTUIR |
| Coyote Creek (South) | between the Diggins house and barn (Middle) | CTUIR |
| Coyote Creek (South) | downstream of Best Road/March Hawk Lane; Sec 32 | CTUIR |
| Coyote Creek (South) | downstream of Conner Road culvert; Sec 04 | CTUIR |
| Coyote Creek (South) | downstream of Diggins/CTUIR gate on gravel road (Lower); Metals 2009; M05 | CTUIR |
| Coyote Creek (South) | upstream of Goad Road, West UIR boundary; WQ site UIR118 | CTUIR |
| Coyote Creek (South) | upstream of Motanic Road culvert; Sec 04 | CTUIR |
| Coyote Creek (South) | upstream of So. Market Road culvert, near abandoned house | CTUIR |
| Crawford Hollow Creek | at Double M (Hopper) downstream culvert, Lower | CTUIR |
| Crawford Hollow Creek | at Double M (Hopper) upstream culvert, Upper | CTUIR |
| Crawford Hollow Creek | downstream of Crawford Hollow/Tubbs Ranch Rds culvert, above Hopper property | CTUIR |
| Crawford Hollow Creek | downstream of Mann Rd culvert; WQ site UIR104 | CTUIR |
| Crawford Hollow Creek | upstream of Mann Rd, TL11800 at Lieuallen culvert (Middle); UIR129 | CTUIR |
| Crawford Hollow Creek | upstream of Mann Rd, TL11800 at Lieuallen fence (Lower); UIR128 | CTUIR |
| Crawford Hollow Creek | upstream of Mann Rd, TL11800 at Lieuallen fence (Upper); UIR130 | CTUIR |
| Gerking Creek | at the mouth; TMDL Project UMA146 | UBWC |
| Greasewood Creek | at the mouth, in Lower project area; RM 0.1; Temperature Site; TMDL Project UMA143 | CTUIR |
| Indian Lake | 94 meters NW of dam; WQ12 in 1991 study; Lake Study 2007; UIR005 | CTUIR |
| Indian Lake | at concrete boat ramp near main entrance; Elk Kill 2009; WQ site UIR136 | CTUIR |
| Indian Lake | at cove near campsite #11; Elk Kill 2009 | CTUIR |
| Indian Lake | at east end of dam; Elk Kill 2009 | CTUIR |
| Indian Lake | at NE side; Elk Kill 2009 | CTUIR |
| Indian Lake | at undeveloped boat ramp2 near campsite #25; Elk Kill 2009 | CTUIR |
| Indian Lake | downstream of spillway; WQ5 in 1991 study; WQ site UIR105 | CTUIR |
| Indian Lake | East Unnamed Trib by the lake inlet; WQ4 in 1991 study, stream at east end of lake; Lake Study 2007; UIR131 | CTUIR |
| Indian Lake | in the center btwn second launch area and dam; WQ16 in 1991 study; Lake Study 2007; UIR004 | CTUIR |
| Indian Lake | NE near second campground; Lake Study 2007; UIR003 | CTUIR |
| Indian Lake | NE of main boat ramp (direction may be wrong); Lake Study 2007; UIR001 | CTUIR |
| Indian Lake | NW of the dam near spillway; Lake Study 2007; UIR006 | CTUIR |
| Indian Lake | NW Unnamed Trib downstream of pool/culvert outlet; WQ7 in 1991 study; Lake Study 2007; UIR132 | CTUIR |
| Indian Lake | South of concrete boat ramp, North of trib; Lake Study 2007; UIR002 | CTUIR |
| Indian Lake | SW end of lake near private property;WQ15 in 1991 study; Lake Study 2007; UIR007 | CTUIR |
| Indian Lake (East Un-named tributary) | at culvert east of campground on road to spillway; WQ site UIR106 | CTUIR |
| Isqúulktpe Creek | between UPRR & Bingham Rd bridges; WQ site UIR107 | CTUIR |
| Isqúulktpe Creek | upstream at USGS gage; RM 2; ISCO site; WQ site UIR108; Temperature site | CTUIR |
| Jennings Creek | upstream of Indian Lake across from gravel pit; east of IL Dam road; WQ8 in 1991 study; WQ site UIR109 | CTUIR |
| Little Greasewood Creek | at the mouth; TMDL Project UMA168 | UBWC |
| McCormmach Creek | at the mouth; TMDL Project UMA160 | UBWC |
| McKay Creek | downstream of McKay Reservoir; seepage collection facility; RM 6; Temperature site | CTUIR |
| McKay Creek | downstream of Shaw Road Bridge in Sec 35, near Rockwell Rd | CTUIR |
| McKay Creek | upstream of McKay Creek Road bridge; Sec 01; WQ site UIR111 | CTUIR |
| McKay Creek | upstream of West UIR Boundary (Insko); WQ site UIR110 | CTUIR |
| McKay Creek | upstream of West UIR Boundary (Stanley); WQ site UIR135; Toxics 2009 | CTUIR |
| McKay Creek | west of Sumac Road, upstream of McKay Road bridge in Sec 05 off old dirt road; WQ site UIR112 | CTUIR |
| McKay Creek (North Fork) | at USGS gage near East UIR Boundary; Temperature site; WQ site UIR116 | CTUIR |
| McKay Creek (North Fork) | Headwater, 10 ft from lower UIR line, Lot 4800; WQI 03-001 Buffalo Wallow #Res1 | CTUIR |
| McKay Creek (North Fork) | Headwater, 370 ft from lower UIR line upstream of culvert, Lot 4800; WQI 03-001 Buffalo Wallow #Res2 | CTUIR |
| McKay Creek (North Fork) | Headwater, 640 ft from lower UIR line downstream of culvert, Lot 4800; WQI 03-001 Buffalo Wallow #Res3 | CTUIR |
| McKay Creek (North Fork) | Headwater, at lower southern UIR line, Lot 4800; WQI 03-001 Buffalo Wallow #S2 | CTUIR |
| McKay Creek (North Fork) | Headwater, at upper northern UIR line, Lot 4800; WQI 03-001 Buffalo Wallow #S3 | CTUIR |
| McKay Creek (North Fork) | on EF Unnamed Trib at eastern UIR line before property, Lot 4800; WQI 03-001 Buffalo Wallow #S4 | CTUIR |
| McKay Creek (North Fork) | on EF Unnamed Trib at lower southern UIR line, Lot 4800; WQI 03-001 Buffalo Wallow #S1 | CTUIR |
| McKay Creek (North Fork) | on EF Unnamed Trib from highway culvert on eastern UIR line before property, Lot 4800; WQI 03-001 Buffalo Wallow #S5 | CTUIR |
| Meacham Creek | upstream of Bingham Road Bridge; WQ site UIR113; Toxics 2009 | CTUIR |
| Minthorn Springs | at fish facility above culvert near Umatilla RM 62.5; Temperature site | CTUIR |
| Mission Creek | at St. Andrews Mission Road Bridge | CTUIR |
| Mission Creek | at Wa Wa Ne Lane off Short Mile Rd / UPRR access road; ISCO site; WQ site UIR134 | CTUIR |
| Mission Creek | Mission Cr at Calhoun Bridge on Short Mile Rd; V12-001-2 | CTUIR |
| Mission Creek | Mission Cr at end of Short Mile Rd at Sohappy trail; V12-001-1 | CTUIR |
| Mission Creek | upstream of Cayuse Road; RM 1.25; Temperature site; Long-term Site UIR114 | CTUIR |
| Mission Creek | upstream of springs but below forks; RM 3.8; Temperature site | CTUIR |
| Mission Creek | upstream of St. Andrews; downstream of the forks and below springs; RM 3.7; Temperature site | CTUIR |
| Moonshine Creek | at a spring upstream ~0.4 miles from Cayuse Rd | CTUIR |
| Moonshine Creek | at USGS gage upstream of Cayuse Rd; RM 1.1; Temperature site; WQ site UIR115 | CTUIR |
| Moonshine Creek | downstream of River Road | CTUIR |
| Moonshine Creek | off Burke Road up Doe Canyon ~0.3 miles | CTUIR |
| Patawa Creek | at culvert on ODOT-TERF Road; Metals 2009, M03 | CTUIR |
| Patawa Creek | at Goad Road Bridge near West UIR boundary; RM 1.3; Temperature site; WQ site UIR117 | CTUIR |
| Patawa Creek | downstream off private road west of Billy Road | CTUIR |
| Sand Hollow Creek | at the mouth; TMDL Project UMA144 | UBWC |
| Shaplish Canyon Creek | just off Bingham Rd (G. Weathers) | CTUIR |
| Spring Creek | at the mouth; TMDL Project UMA142 | UBWC |
| Spring Hollow Creek | above the mouth atf Hwy 11 bridge; TMDL Project UMA170 | UBWC |
| Spring Hollow Creek | at Eagle Creek Road (upper); WQ site M06 | CTUIR |
| Spring Hollow Creek | at Pambrum Road bridge; Site SH3; Metals 2009, M01 | CTUIR |
| Spring Hollow Creek | at Ross/Hill Road; Site SH1 | CTUIR |
| Spring Hollow Creek | at Spring Hollow Cr Rd bridge #386, in Lower Project area; RM 3.5; Temperature site; Site SH4 | CTUIR |
| Spring Hollow Creek | at Wamishta Road Br #393; RM 4.5; Temperature site; Site SH2 | CTUIR |
| Spring Hollow Creek | at well site across from gravel pit, above LaCourse Rd in Sec 11 | CTUIR |
| Spring Hollow Creek | downstream of LaCourse Road; Site SH5; WQ site UIR119; Toxics 2009 | CTUIR |
| Spring Hollow Creek | upstream of UIR Boundary | CTUIR |
| Spring Hollow Creek (West Fork) | at Betts Rd; Site SH6; Metals 2009, M02 | CTUIR |
| Thornhollow | outfall at Acclimation Facility near RM 73.5; Temperature site | CTUIR |
| Tutuilla Creek | upstream of Goad Road bridge, West UIR boundary; WQ site UIR120 | CTUIR |
| Tutuilla Creek (unnamed trib) | downstream of Motanic Rd / Red Hawk Rd intersection | CTUIR |
| Umatilla River | across from end of Mission Creek; V12-001-5 | CTUIR |
| Umatilla River | across from Imeques Fish Acclimation facility | CTUIR |
| Umatilla River | at Steelhead Park bridge #291 in Hermiston; RM 8.8; Temperature site | CTUIR |
| Umatilla River | at the boat ramp near ODFW at West UIR Fish Acclimation facility; WQ site UIR123; Toxics 2009 | CTUIR |
| Umatilla River | at USGS Gibbon gage near East Boundary; Umatilla Trap below Ryan Ck; ISCO site; WQ site UIR122; Toxics 2009; Temperature site | CTUIR |
| Umatilla River | downstream from Gibbon at old UPRR spur tracks (sediment study); | CTUIR |
| Umatilla River | downstream of Cayuse Bridge; WQ site UIR124 | CTUIR |
| Umatilla River | downstream of Mission Cr confluence; V12-001-4 | CTUIR |
| Umatilla River | downstream of Thorn Hollow bridge at fish facility; RM 73.1; Temperature Site; Long-term Site UIR121 | CTUIR |
| Umatilla River | near UPRR bridge ~RM 72.5 between Grey/Sheoships Lanes | CTUIR |
| Umatilla River | near USGS gage upstream of West UIR Boundary; ISCO site | CTUIR |
| Umatilla River | south of McKinley Lane; dead horse | CTUIR |
| Umatilla River | upstream of Bingham Road bridge #727, above Gibbon (sediment study) | CTUIR |
| Umatilla River | upstream of Mission Hwy 331 bridge; WQ site UIR125 | CTUIR |
| Umatilla River | upstream of Riverside / Hwy 11 bridge | CTUIR |
| Unnamed trib above Minthorn Springs | downstream of Cayuse Rd, east of Niktyoway Rd; WQ site UIR126 | CTUIR |
| Unnamed trib to the Umatilla | downstream of Weathers' feed lot (A1) near Red Elk Canyon | CTUIR |
| Unnamed trib to the Umatilla | downstream of Weathers' feed lot (B2) near Red Elk Canyon | CTUIR |
| Unnamed trib to the Umatilla | side channel of Weathers' feed lot (C2) upstream of confluence | CTUIR |
| Unnamed trib to the Umatilla | upstream of Weathers' feed lot (A2) near Red Elk Canyon | CTUIR |
| Unnamed trib to Wildhorse Creek | downstream of Athena Spring at the mouth at bridge 398; TMDL Project UMA172 | UBWC |
| Wildhorse Creek | at Athena City Park; TMDL ISCO; TMDL Project UMA147 | UBWC |
| Wildhorse Creek | at OWRD gage (Stanhope/Kirsch); Temperature site; TMDL Project UMA141; TMDL ISCO site; Toxics 2009 | UBWC |
| Wildhorse Creek | at Rainville Rd Br #403; TMDL Project UMA167 | UBWC |
| Wildhorse Creek | at wooden bridge 0.7 miles upstream of McLean Road; WQ site UIR127 | CTUIR |
| Wildhorse Creek | at Woodward Road bridge #563; TMDL Project UMA173 | UBWC |
| Wildhorse Creek | downstream of Adams bridge #568 and Sand Hollow Ck; TMDL Project UMA157 | CTUIR |
| Wildhorse Creek | downstream of Athena WWTP; TMDL Project UMA151 | UBWC |
| Wildhorse Creek | downstream of Gerking Cr; TMDL Project UMA153 | UBWC |
| Wildhorse Creek | downstream of McCormmach Cr; TMDL Project UMA161 | UBWC |
| Wildhorse Creek | downstream of Myrick Road bridge #356; Sec29 (Bill Peal); TMDL Project UMA163 | UBWC |
| Wildhorse Creek | downstream of Spring Creek; TMDL Project UMA162 | UBWC |
| Wildhorse Creek | in Gentry pasture between McLean Road bridge #408 and Eagle Cr Rd; TMDL ISCO; TMDL Project UMA171 | UBWC |
| Wildhorse Creek | upstream of Abel Lane (Eagle Cr?); RM30; TMDL Project UMA165 | UBWC |
| Wildhorse Creek | upstream of Gerking Cr; TMDL Project UMA152 | UBWC |
| Wildhorse Creek | upstream of Havana-Helix Hwy 335 bridge (Duff); TMDL ISCO; TMDL Project UMA159 | UBWC |
| Wildhorse Creek | upstream of Little Greasewood Cr; TMDL Project UMA158 | UBWC |
| Wildhorse Creek | upstream of Rothrock Road bridge above Greasewood Ck, in CTUIR exclosure; TMDL ISCO; TMDL Project UMA154 | UBWC |
| Wildhorse Creek | upstream of Sand Hollow Cr; TMDL Project UMA156 | UBWC |
| Wildhorse Creek | upstream of Spring Cr; TMDL Project UMA164 | UBWC |
| Wildhorse Creek | upstream of Wildhorse Rd bridge #398 (Sec29) | CTUIR |