| CODES | SITE NAMES |
| 231113 | Allagash River near Allagash ME |
| 421123 | Allegheny Riv at Kinzua Dam PA |
| 421125 | Allegheny Riv at Natrona PA |
| 331114 | Ammonoosuc River at Bethlehem Junction NH |
| 231116 | Androscoggin River at Rumford ME |
| 231118 | Androscoggin River near Auburn ME |
| 331117 | Androscoggin River near Gorham NH |
| 411129 | Applegate Riv near Wilderville OR |
| 231122 | Aroostook River at Washburn ME |
| 231123 | Aroostook River near Masardis ME |
| 335111 | Ashuelot River below Surry Mtn Dam nr Keene NH |
| 511126 | Back Creek at Sunrise VA |
| 461127 | Bad Riv near Fort Pierre SD |
| 331123 | Baker River near Rumney NH |
| 421148 | Bald Eagle Creek at Blanchard PA |
| 421145 | Bald Eagle Creek blw Spring Crk PA |
| 241123 | Bear Creek at Friendsville MD |
| 335113 | Bearcamp River near South Tamworth NH |
| 361131 | Beaver Kill at Cooks Falls NY |
| 421156 | Beaver Riv at Wampum PA |
| 231126 | Big Black River near Depot Mtn ME |
| 161253 | Big Lost Riv near Arco ID |
| 051329 | Big Piney Creek at Hwy 164 AR |
| 541126 | Big Sandy at Rockville WV |
| 191125 | Big Sioux Riv at Akron IA |
| 461152 | Big Sioux Riv at North Cliff Ave at Sioux Fall SD |
| 301191 | Bighorn Riv above Tullock Creek nr Bighorn MT |
| 525111 | Bighorn Riv at Kane WY |
| 301194 | Bighorn Riv near St Xavier MT |
| 041265 | Bill Williams Riv below Alamo Dam AZ |
| 361151 | Black Creek at Churchville NY |
| 041132 | Black Riv below pumping station AZ |
| 041133 | Black Riv near Fort Apache AZ |
| 551151 | Black Riv near Galesville WI |
| 361158 | Black River at Watertown NY |
| 421171 | Blacklick Creek at Josephine PA |
| 251117 | Blackstone Riv at Northbridge MA |
| 441116 | Blackstone Riv at Woonsocket RI |
| 541132 | Blackwater Riv at Davis WV |
| 081246 | Blue Riv below Dillon CO |
| 081247 | Blue Riv below Green Mountain Reservoir CO |
| 411153 | Blue Riv blw Tidbits Creek nr Blue OR |
| 041134 | Blue Riv near Clifton AZ |
| 481818 | Bosque Riv North near Clifton TX |
| 191127 | Boyer Riv at Logan IA |
| 481247 | Brazos Riv near Hempstead TX |
| 451166 | Broad Riv near Carlisle SC |
| 421179 | Brodhead Creek at Minisink Hills PA |
| 421182 | Brokenstraw Creek at Youngsville PA |
| 541142 | Buffalo Creek at Barrackville WV |
| 051242 | Buffalo Riv near St Joe AR |
| 411625 | Bull Run Riv, NF nr Multnomah Falls OR |
| 091111 | Burlington Brook near Burlington CT |
| 051249 | Cadron Creek near Guy AR |
| 351171 | Canadian Riv near Sanchez NM |
| 351164 | Canadian Riv near Taylor Springs NM |
| 271151 | Cannon Riv at Welch MN |
| 381149 | Cannonball River at Breien ND |
| 371195 | Cape Fear River at Fayetteville NC |
| 371196 | Cape Fear River at Lillington NC |
| 531219 | Carbon Riv near Fairfax WA |
| 231128 | Carrabassett River near North Anson ME |
| 321152 | Carson Riv near Fort Churchill NV |
| 241138 | Casselman Riv at Grantsville MD |
| 421195 | Casselman Riv at Markleton PA |
| 371215 | Cataloochee Creek near Cataloochee NC |
| 531231 | Cedar Riv near Landsburg WA |
| 251127 | Charles Riv at Waltham MA |
| 451211 | Chattooga Riv near Clayton SC |
| 541493 | Cheat Riv at Albright WV |
| 541155 | Cheat Riv nr Parsons WV |
| 531241 | Chehalis Riv at Porter WA |
| 081336 | Cherry Creek near Franktown CO |
| 041114 | Cherry Creek near Globe AZ |
| 041295 | Chevelon Fork below Wildcat Canyon AZ |
| 461188 | Cheyenne Riv near Wasta SD |
| 251132 | Chicopee Riv at Indian Orchard MA |
| 551173 | Chippewa Riv at Chippewa Falls WI |
| 551174 | Chippewa Riv at Durand WI |
| 271156 | Chippewa Riv near Milan MN |
| 421223 | Clarion Riv at Cooksburg PA |
| 421224 | Clarion Riv at Johnsonburg PA |
| 421225 | Clarion Riv at Ridgway PA |
| 421315 | Clarion Riv, E Br at E Br Clarion Dam PA |
| 421753 | Clarion Riv, West Branch at Wilcox PA |
| 081352 | Clear Creek at Golden CO |
| 081359 | Clear Creek near Lawson CO |
| 541161 | Clear Fork at Clear Fork WV |
| 391176 | Clear Fork blw Pleasant Hill Dam OH |
| 421231 | Clearfield Creek at Dimeling PA |
| 161379 | Clearwater Riv at Orofino ID |
| 161881 | Clearwater Riv, South Fork at Stites ID |
| 161771 | Clearwater, N Fork nr Canyon Ranger ID |
| 541164 | Coal Riv at Tornado WV |
| 331196 | Cocheco River Near Rochester NH |
| 421239 | Codorus Creek near York PA |
| 161391 | Coeur d'alene Riv near Cataldo ID |
| 471216 | Collins Riv at McMinnville TN |
| 041322 | Colorado Riv abv Diamond Creek nr Peach Sp AZ |
| 041325 | Colorado Riv at Lees Ferry AZ |
| 081384 | Colorado Riv near Cameo CO |
| 421242 | Conemaugh Riv at Seward Site 31 PA |
| 421243 | Conemaugh Riv at Tunnelton PA |
| 421247 | Conewango Creek at Russell PA |
| 091139 | Connecticut Riv at Hartford CT |
| 251136 | Connecticut Riv at Montague City MA |
| 091142 | Connecticut Riv at Thompsonville CT |
| 501123 | Connecticut Riv at Wells Riv VT |
| 331135 | Connecticut River at North Walpole NH |
| 331138 | Connecticut River at West Lebanon NH |
| 421248 | Connoquenessing Creek nr Zelienople PA |
| 331143 | Contoocook River at Peterborough NH |
| 331145 | Contoocook River near Henniker NH |
| 051253 | Cossatot Riv near Vandervoort AR |
| 061644 | Cosumnes Riv at Michigan Bar CA |
| 531341 | Cowlitz Riv at Castle Rock WA |
| 531344 | Cowlitz Riv at Packwood WA |
| 531346 | Cowlitz Riv below Mayfield Dam WA |
| 541172 | Cranberry Riv at Richwood WV |
| 421268 | Crooked Creek at Idaho PA |
| 271177 | Crow Riv at Rockford MN |
| 081443 | Crystal Riv abv Avalanche Crk nr Redstone CO |
| 211173 | Cumberland Riv at Williamsburg KY |
| 211419 | Cumberland Riv, South Fork near Stearns KY |
| 391189 | Cuyahoga Riv at Independence OH |
| 391192 | Cuyahoga Riv at Old Portage OH |
| 371288 | Deep River at Moncure NC |
| 371289 | Deep River at Ramseur NC |
| 251144 | Deerfield Riv near West Deerfield MA |
| 421293 | Delaware Riv at Port Jervis PA |
| 361775 | Delaware River at W Branch at Hale Eddy NY |
| 411316 | Deschutes Riv at Moody near Biggs OR |
| 531379 | Deschutes Riv near Rainier WA |
| 331146 | Diamond River near Wentworth Location NH |
| 081478 | Dolores Riv near Bedrock CO |
| 541182 | Dry Fork at Beartown WV |
| 541183 | Dry Fork at Hendricks WV |
| 421297 | Dunkard Creek at Shannopin PA |
| 511268 | Dunlap Creek near covington VA |
| 051259 | Dutch Creek at Waltreak AR |
| 041383 | Eagle Creek abv Pumping Plant nr Morenci AZ |
| 081494 | Eagle Riv at Red Cliff CO |
| 081495 | Eagle Riv below Gypsum CO |
| 491337 | East Canyon Creek near Morgan UT |
| 191169 | East Nishnabotna Riv near Atlantic IA |
| 191171 | East Nishnabotna Riv near Red Oak IA |
| 041116 | East Verde Riv near Childs AZ |
| 061834 | Eel Riv at Fernbridge CA |
| 063527 | Eel Riv SF near Miranda CA |
| 411358 | Elk Creek near Trail OR |
| 541199 | Elk Riv at Queen Shoals WV |
| 541212 | Elk Riv below Webster Springs WV |
| 541213 | Elk Riv near Frametown WV |
| 311197 | Elkhorn Riv at Norfolk NE |
| 311212 | Elkhorn Riv at Waterloo NE |
| 311213 | Elkhorn Riv at West Point NE |
| 471288 | Emory Riv at Oakdale TN |
| 371324 | Eno River near Durham NC |
| 491361 | Escalante Riv near Escalante UT |
| 461233 | Fall Riv at Hot Springs SD |
| 091159 | Farmington Riv at Unionville CT |
| 231144 | Fish River near Fort Kent ME |
| 371333 | Flat River at Bahama NC |
| 191175 | Floyd Riv at Alton IA |
| 191176 | Floyd Riv at James IA |
| 051177 | Fourche La Fave S Fork nr Hollis AR |
| 421343 | French Creek at Meadville PA |
| 421345 | French Creek at Utica PA |
| 421348 | French Creek near Union City PA |
| 421349 | French Creek near Wattsburg PA |
| 051268 | Frog Bayou at Rudy AR |
| 081622 | Fryingpan Riv near Ruedi CO |
| 301428 | Gallatin Riv at Logan MT |
| 541221 | Gauley Riv above Belva WV |
| 541223 | Gauley Riv at Camden on Gauley WV |
| 541225 | Gauley Riv below Summersville WV |
| 541226 | Gauley Riv nr Craigsville WV |
| 361385 | Genesee River near Mount Morris NY |
| 351277 | Gila Riv below Blue Creek near Virden NM |
| 041165 | Gila Riv below Coolidge Dam AZ |
| 351281 | Gila Riv near Redrock NM |
| 401293 | Glover Riv near Glover OK |
| 231146 | Grand Lake Stream at Grand Lake Stream ME |
| 461247 | Grand Riv at Little Eagle SD |
| 411398 | Grande Ronde Riv at Troy OR |
| 361394 | Great Chazy River at Perry Mills NY |
| 491394 | Green Riv at Green Riv UT |
| 531492 | Green Riv at Purification Pnt near Palmer WA |
| 531496 | Green Riv near Auburn WA |
| 525130 | Green Riv near Green Riv WY |
| 525128 | Green Riv near Labarge WY |
| 541235 | Greenbrier Riv at Buckeye WV |
| 541237 | Greenbrier Riv at Hilldale WV |
| 081673 | Gunnison Riv near Gunnison CO |
| 541242 | Guyandotte Riv at Branchland WV |
| 371365 | Haw River at Haw Riv NC |
| 371122 | Haw River near Bynum NC |
| 381196 | Heart Riv at Starck Bridge near Judson ND |
| 381199 | Heart Riv near Mandan ND |
| 411428 | Hood Riv at Tucker Bridge nr Hood OR |
| 091186 | Housatonic Riv at Stevenson CT |
| 251175 | Housatonic Riv near Great Barrington MA |
| 361426 | Hudson River at Green Island NY |
| 361427 | Hudson River at Hadley NY |
| 321321 | Humboldt Riv near Imlay NV |
| 391299 | Huron Riv at Milan OH |
| 051139 | Illinois Bayou near Scottsville AR |
| 401312 | Illinois Riv near Gore OK |
| 401313 | Illinois Riv near Tahlequah OK |
| 361443 | Independence River at Donnattsburg NY |
| 062164 | Indian Creek near Happy Camp CA |
| 251181 | Ipswich Riv near Ipswich MA |
| 331197 | Isinglass River at Rochester Neck Rd Near Dover NH |
| 461273 | James Riv near Scotland SD |
| 301467 | Jefferson Riv near Three Forks MT |
| 541264 | Kanawha Riv at Charleston WV |
| 541266 | Kanawha Riv at Kanawha Falls WV |
| 231158 | Kennebec River at North Sidney ME |
| 231159 | Kennebec River at the Forks ME |
| 211316 | Kentucky Riv, North Fork at Jackson KY |
| 211422 | Kentucky Riv, South Fork at Booneville KY |
| 421377 | Kettle Creek near Westport PA |
| 551295 | Kickapoo Riv at La Farge WI |
| 051281 | Kings Riv near Berryville AR |
| 421378 | Kinzua Creek near Guffey PA |
| 421383 | Kiskiminetas Riv at Vandergrift PA |
| 062246 | Klamath Riv at Orleans CA |
| 531581 | Klickitat Riv near Pitt WA |
| 381228 | Knife Riv at Hazen ND |
| 421384 | Lackawanna Riv at Archbald PA |
| 421734 | Lackawaxen Riv, W Br at Prompton PA |
| 501138 | Lamoille River at East Georgia VT |
| 501137 | Lamoille River at Jeffersonville VT |
| 501139 | Lamoille River at Johnson VT |
| 331153 | Lamprey River near Newmarket NH |
| 525118 | Laramie Riv at Fort Laramie WY |
| 421394 | Laurel Hill Creek at Ursina PA |
| 421395 | Lehigh Riv blw Frncs E Wltr Res PA |
| 481651 | Leon Riv at Gatesville TX |
| 531433 | Lewis Riv, East Fork near Heisson WA |
| 391356 | Licking Riv near Newark OH |
| 391523 | Licking Riv, South Fork near Hebron OH |
| 231164 | Little Androscoggin River near South Paris ME |
| 391324 | Little Beaver Creek near E Liverpool OH |
| 421419 | Little Conemaugh at E Conemaugh PA |
| 271285 | Little Fork Riv at Little Fork MN |
| 421426 | Little Juniata Riv at Spruce Creek PA |
| 541478 | Little Kanawh, W Fork, Rocksdale WV |
| 541296 | Little Kanawha Riv at Burnsville WV |
| 541297 | Little Kanawha Riv at Glenville WV |
| 541298 | Little Kanawha Riv at Grantsville WV |
| 541299 | Little Kanawha Riv at Palestine WV |
| 541281 | Little Kanawha Riv near Wildcat WV |
| 421433 | Little Mahoning Creek at Mccormick PA |
| 381239 | Little Missouri Riv near Watford City ND |
| 055118 | Little Missouri Riv nr Langley AR |
| 051291 | Little Piney Creek near Lamar AR |
| 051153 | Little Red, Middle Fork at Shirley AR |
| 051176 | Little Red, South Fork at Clinton AR |
| 371437 | Little River near Princeton NC |
| 131412 | Little River near Washington GA |
| 211275 | Little Sandy Riv at Grayson KY |
| 191198 | Little Sioux Riv at Correctionville IA |
| 191211 | Little Sioux Riv at Linn Grove IA |
| 191227 | Little Sioux Riv Monona-Harrison Ditch nr Tu IA |
| 191212 | Little Sioux Riv near Turin IA |
| 371451 | Little Tennessee at Needmore NC |
| 525115 | Little Wind Riv at Riverton WY |
| 551349 | Little Wolf Riv at Royalton WI |
| 161669 | Lochsa Riv near Lowell ID |
| 311254 | Logan Creek near Uehling NE |
| 421445 | Loyalhanna Creek at Kingston PA |
| 062395 | Mad Riv near Arcata CA |
| 301563 | Madison Riv below Ennis Lake nr Mcallister MT |
| 421454 | Mahoning Creek at Punxsutawney PA |
| 421453 | Mahoning Crk at Mahoning Crk Dam PA |
| 191214 | Maple Riv at Mapleton IA |
| 231172 | Mattawamkeag River near Mattawamkeag ME |
| 391393 | Maumee Riv at Waterville OH |
| 411538 | McKenzie Riv near Vida OR |
| 251197 | Merrimack Riv blw Concord Riv at Lowell MA |
| 331158 | Merrimack River at Franklin Junction NH |
| 331156 | Merrimack River near Goffs Falls below Manchester NH |
| 531669 | Methow Riv abv Goat Creek near Mazama WA |
| 531673 | Methow Riv at Winthrop WA |
| 531674 | Methow Riv near Pateros WA |
| 541319 | Middle Fork Riv at Audra WV |
| 311271 | Middle Loup Riv at St Paul NE |
| 301598 | Milk Riv at Juneberg Bridge near Saco MT |
| 301612 | Milk Riv at Nashua MT |
| 251212 | Millers River at Erving MA |
| 271315 | Minnesota Riv at Montevideo MN |
| 271318 | Minnesota Riv near Jordan MN |
| 501193 | Missisquoi River at Swanton VT |
| 501152 | Missisquoi River near East Berkshire VT |
| 501153 | Missisquoi River near North Troy VT |
| 271324 | Mississippi Riv at Aitkin MN |
| 551392 | Mississippi Riv at Prescott WI |
| 271339 | Mississippi Riv at Winona MN |
| 271343 | Mississippi Riv near Anoka MN |
| 381266 | Missouri Riv at Bismarck ND |
| 311283 | Missouri Riv at Decatur NE |
| 461326 | Missouri Riv at Farm Island near Pierre SD |
| 461327 | Missouri Riv at Laframboise Island at Pierre SD |
| 461328 | Missouri Riv at Pierre SD |
| 381268 | Missouri Riv at Price ND |
| 191226 | Missouri Riv at Sioux City IA |
| 461292 | Missouri Riv at Springfield SD |
| 301638 | Missouri Riv at Toston MT |
| 301639 | Missouri Riv at Virgelle MT |
| 381269 | Missouri Riv at Washburn ND |
| 461329 | Missouri Riv at Yankton SD |
| 381272 | Missouri Riv below Mandan ND |
| 301645 | Missouri Riv near Culbertson MT |
| 301647 | Missouri Riv near Landusky MT |
| 311281 | Missouri Riv near Maskell NE |
| 381274 | Missouri Riv near Stanton ND |
| 301651 | Missouri Riv near Ulm MT |
| 351377 | Mora Riv near Golodrinas NM |
| 461342 | Moreau Riv near Whitehorse SD |
| 091114 | Mount Hope Riv near Warrenville CT |
| 405112 | Mountain Fork at Smithville OK |
| 401366 | Mountain Fork near Eagletown OK |
| 491544 | Muddy Creek near Emery UT |
| 051159 | Mulberry Riv near Mulberry AR |
| 301669 | Musselshell Riv near Roundup MT |
| 231111 | Narraguagus River at Cherryfield ME |
| 251222 | Nashua Riv at East Pepperell MA |
| 091227 | Naugatuck Riv at Beacon Falls CT |
| 481793 | Neches Riv near Diboll TX |
| 251227 | Neponset Riv at Norwood MA |
| 371513 | Neuse River near Falls NC |
| 525136 | New Fork Riv near Big Piney WY |
| 511434 | New Riv at Glen Lyn VA |
| 541337 | New Riv at Hinton WV |
| 541338 | New Riv at Thurmond WV |
| 311324 | Niobrara Riv near Verdel NE |
| 531757 | Nisqually Riv at La Grande WA |
| 531758 | Nisqually Riv at McKenna WA |
| 531762 | Nisqually Riv near National WA |
| 471449 | Nolichucky Riv at Embreeville TN |
| 251229 | North Nashua Riv at Fitchburg MA |
| 451368 | North Pacolet Riv at Fingerville SC |
| 311294 | North Platte Riv at Wyo-Nebr State Line NE |
| 251233 | North Riv at Shattuckville MA |
| 041499 | Oak Creek near Cornville AZ |
| 041511 | Oak Creek near Sedona AZ |
| 491581 | Ogden blw Pineview Res nr Huntsville UT |
| 251234 | Old Swamp Riv near South Weymouth MA |
| 481861 | Onion Creek near Driftwood TX |
| 361583 | Oswego River at Lock 7 NY |
| 055116 | Ouachita blw Remmel Dam Jones AR |
| 321423 | Owyhee Riv near Gold Creek NV |
| 411671 | Owyhee Riv near Rome OR |
| 451376 | Pacolet Riv near Fingerville SC |
| 481868 | Paluxy Riv at Glen Rose TX |
| 341246 | Passaic Riv at Little Falls NJ |
| 331198 | Peabody River at Gorham NH |
| 351415 | Pecos Riv above Cannon Del Uta nr Colonias NM |
| 351419 | Pecos Riv below Santa Rosa Dam NM |
| 351435 | Pecos Riv below Sumner Dam NM |
| 351432 | Pecos Riv blw Dark Canyon at Carlsbad NM |
| 331172 | Pemigewasset River at Plymouth NH |
| 331173 | Pemigewasset River at Woodstock NH |
| 335114 | Pemigewasset River East Branch at Lincoln NH |
| 091242 | Pendleton Hill Brook near Clarks Falls CT |
| 231185 | Penobscot River at West Enfield ME |
| 191245 | Perry Creek at 38th Street Sioux City IA |
| 051325 | Petit Jean Riv near Booneville AR |
| 371575 | Pigeon River near Hepco NC |
| 421537 | Pine Creek at Cedar Run PA |
| 481919 | Pine Island Bayou near Sour Lake TX |
| 082144 | Piney Riv near State Bridge CO |
| 231187 | Piscataquis River at Medford ME |
| 231188 | Piscataquis River near Dover-Foxcroft ME |
| 331175 | Piscataquog River near Goffstown NH |
| 311356 | Platte Riv at Louisville NE |
| 311364 | Platte Riv at North Bend NE |
| 311357 | Platte Riv near Ashland NE |
| 311366 | Platte Riv near Grand Island NE |
| 311367 | Platte Riv near Kearney NE |
| 082156 | Plum Creek near Sedalia CO |
| 091115 | Pomperaug Riv at Southbury CT |
| 161837 | Portneuf Riv at Pocatello ID |
| 241275 | Potomac Riv at Hancock MD |
| 241276 | Potomac Riv at Paw Paw, WV MD |
| 241276 | Potomac Riv at Paw Paw, WV WV |
| 241281 | Potomac Riv near Little Falls, DC MD |
| 241236 | Potomac Riv, N Br at Barnum WV MD |
| 241237 | Potomac Riv, N Br at Kitzmiller MD |
| 541331 | Potomac Riv, N Branch at Luke WV |
| 541412 | Potomac Riv, S Br nr Springfield WV |
| 241236 | Potomac, N Br at Barnum WV WV |
| 511477 | Potts Creek near Covington VA |
| 301735 | Powder Riv near Locate MT |
| 251241 | Priest Brook near Winchendon MA |
| 161847 | Priest Riv near Priest Riv ID |
| 082168 | Purgatoire Riv below Trinidad Lake CO |
| 531868 | Puyallup Riv near Ortino WA |
| 251243 | Quaboag Riv at West Brimfield MA |
| 091253 | Quinebaug at Jewett City CT |
| 091254 | Quinebaug Riv at Putnam CT |
| 091116 | Quinnipiac Riv at Wallingford CT |
| 421555 | Raccoon Creek at Moffatts Mill PA |
| 531879 | Raging Riv near Fall City WA |
| 341313 | Raritan Riv, S Br near High Bridge NJ |
| 421563 | Redbank Creek at St Charles PA |
| 421564 | Redstone Creek at Waltersburg PA |
| 062971 | Redwood Creek at Orick CA |
| 055117 | Richland Creek near Witts Spring AR |
| 351472 | Rio Chama above Abiquiu Reservoir NM |
| 351475 | Rio Chama below Abiquiu Dam NM |
| 351477 | Rio Chama near Chamita NM |
| 351487 | Rio Grande at Albuquerque NM |
| 351489 | Rio Grande at Embudo NM |
| 351493 | Rio Grande at Otowi Bridge NM |
| 351547 | Rio Nambe below Nambe Falls Dam NM |
| 082229 | Roaring Fork Riv at Glenwood Springs CO |
| 191256 | Rock Riv near Rock Valley IA |
| 211377 | Rockcastle Riv at Billows KY |
| 411715 | Rogue Riv at Dodge Br nr Eagle Pt OR |
| 411717 | Rogue Riv at Grants Pass OR |
| 411725 | Rogue Riv at Raygold nr Central Pt OR |
| 051333 | Rolling Fork near DeQueen AR |
| 211386 | Rough Riv near Dundee KY |
| 511534 | Russell Fork at Bartlick VA |
| 063154 | Russian Riv near Healdsburg CA |
| 063155 | Russian Riv near Hopland CA |
| 481977 | Sabine Riv near Beckville TX |
| 361646 | Sacandaga River near Hadley NY |
| 231196 | Saco River at Cornish ME |
| 331112 | Saco River near Conway NH |
| 063169 | Sacramento Riv at Colusa CA |
| 063176 | Sacramento Riv at Delta CA |
| 091274 | Salmon Creek at Lime Rock CT |
| 161912 | Salmon Riv at White Bird ID |
| 091117 | Salmon Riv near East Hampton CT |
| 361800 | Salmon River at Pineville NY |
| 063221 | Salmon River at Somes Bar CA |
| 361801 | Salmon River North Branch at Redfield NY |
| 311414 | Salt Creek at Greenwood NE |
| 311415 | Salt Creek at Lincoln NE |
| 041211 | Salt Riv near Chrysotile Ariz Mile 348 AZ |
| 041563 | Salt Riv near Roosevelt AZ |
| 451423 | Saluda Riv at Chappells SC |
| 482131 | San Antonio Riv near Falls City TX |
| 063248 | San Antonio Riv near Lockwood CA |
| 041567 | San Francisco Riv at Clifton AZ |
| 351592 | San Francisco Riv near Glenwood NM |
| 482323 | San Jacinto Riv W F near Conroe TX |
| 351599 | San Juan Riv at Farmington NM |
| 082268 | San Juan Riv at Pagosa Springs CO |
| 482146 | San Marcos Riv at San Marcos TX |
| 082278 | San Miguel Riv near Placerville CO |
| 391541 | Sandusky Riv near Fremont OH |
| 411755 | Sandy Riv blw Bull Run Riv nr Bull OR |
| 231212 | Sandy River near Mercer ME |
| 531977 | Sauk Riv near Sauk WA |
| 241288 | Savage Riv blw Savage Dam MD |
| 131553 | Savannah River at Augusta GA |
| 063492 | Scott River near Fort Jones CA |
| 161933 | Selway Riv near Lowell ID |
| 541389 | Shavers Fork at Bemis WV |
| 231215 | Sheepscot River at North Whitefield ME |
| 541394 | Shenandoah Riv at Millville WV |
| 421614 | Shenango Riv at Sharpsville PA |
| 091287 | Shetucket Riv near Willimantic CT |
| 421331 | Sinnemahoning 1st Fk at Wharton PA |
| 421329 | Sinnemahoning 1st Fk nr Sinnemahoni PA |
| 421296 | Sinnemahoning Crk, Driftwood Br PA |
| 532123 | Skagit Riv at Marblemount WA |
| 532125 | Skagit Riv near Concrete WA |
| 532127 | Skagit Riv near Mount Vernon WA |
| 532131 | Skagit Riv near Rockport WA |
| 532141 | Skykomish Riv near Gold Bar WA |
| 421624 | Slippery Rock Creek at Wurtemburg PA |
| 063615 | Smith Riv at Dr Fine Bridge near Fort Dick CA |
| 063614 | Smith Riv at Jed Smith St Pk nr Crescent CA |
| 331182 | Smith River near Bristol NH |
| 411112 | Snake Riv at Hells Canyon Dam Idaho OR |
| 161996 | Snake Riv near Murphy ID |
| 532153 | Snoqualmie Riv near Carnation WA |
| 531677 | Snoqualmie Riv, Middle Fork near Tanner WA |
| 531729 | Snoqualmie Riv, N F nr Snoqualmie Falls WA |
| 531991 | Snoqualmie Riv, S F above Alice Crk WA |
| 191265 | Soldier Riv at Pisgah IA |
| 331185 | Souhegan River at Merrimack NH |
| 371658 | South Toe River near Celo NC |
| 421637 | Spring Creek at Milesburg PA |
| 251261 | Squannacook Riv near West Groton MA |
| 551528 | St Croix Riv at St Croix Falls WI |
| 231217 | St Croix River at Baring ME |
| 231219 | St Croix River at Vanceboro ME |
| 162131 | St Joe Riv at Calder ID |
| 231223 | St John River at Dickey ME |
| 231224 | St John River at Ninemile Bridge ME |
| 231226 | St John River below Fish Riv at Fort Kent ME |
| 531731 | Stillaguamish Riv, N F near Arlington WA |
| 421652 | Stony Creek at Ferndale PA |
| 051182 | Strawberry Riv near Poughkeepsie AR |
| 482231 | Sulphur Riv near Talco TX |
| 301943 | Sun Riv near Vaughn MT |
| 421748 | Susquehanna, W Br at Curwensville PA |
| 231229 | Swift River near Roxbury ME |
| 371687 | Tar River near Tar NC |
| 082454 | Taylor Riv at Almont CO |
| 162142 | Teton Riv abv Leigh Creek nr Driggs ID |
| 011277 | The Conecuh River at Brantley AL |
| 532276 | Tilton Riv abv Bear Canyon Crk nr Cineba WA |
| 361736 | Tioga River at Lindley NY |
| 421699 | Tionesta Creek at Tionesta Dam PA |
| 532281 | Tolt Riv near Carnation WA |
| 531925 | Tolt Riv, S F below Regulating Basin NE WA |
| 532183 | Tolt Riv, S F near Carnation WA |
| 532182 | Tolt Riv, S F near Index WA |
| 301975 | Tongue Riv at Miles City MT |
| 525141 | Tongue Riv near Dayton WY |
| 041227 | Tonto Creek above Gun Creek nr Roosevelt AZ |
| 532289 | Toutle Riv at Tower Road near Silver Lake WA |
| 421717 | Towanda Creek near Monroeton PA |
| 551548 | Trempealeau Riv at Dodge WI |
| 481341 | Trinity Riv Clear Fork near Benbrook TX |
| 481492 | Trinity Riv Elm Fork from Lewisville Dam TX |
| 063798 | Trinity Riv Riv at Hoopa CA |
| 063797 | Trinity River Above Coffee Creek near Trinity Ctr CA |
| 063815 | Trinity River near Burnt Ranch CA |
| 063158 | Trinity River, South Fork below Hyampom CA |
| 063818 | Truckee Riv at Farad CA |
| 321517 | Truckee River near Nixon NV |
| 063859 | Tuolumne below Early intake nr Mather CA |
| 063858 | Tuolumne Riv at Modesto CA |
| 532298 | Twisp Riv near Twisp WA |
| 421727 | Two Lick Creek at Graceton PA |
| 541471 | Tygart Valley Riv at Belington WV |
| 541472 | Tygart Valley Riv at Colfax WV |
| 541474 | Tygart Valley Riv at Philippi WV |
| 541469 | Tygart Valley Riv at Tygart Dam WV |
| 541475 | Tygart Valley Riv nar Dailey WV |
| 541476 | Tygart Valley Riv near Elkins WV |
| 451498 | Tyger Riv near Delta SC |
| 361754 | Unadilla River at Rockdale NY |
| 082516 | Uncompahgre Riv Below Ridgway Reserv CO |
| 063886 | Van Duzen Riv near Bridgeville CA |
| 041233 | Verde Riv below Bartlett Dam AZ |
| 041656 | Verde Riv near Clarkdale AZ |
| 041655 | Verde Riv near Scottsdale AZ |
| 461462 | Vermillion Riv near Vermillion SD |
| 482291 | Village Creek at Kountze TX |
| 041657 | Virgin Riv at Littlefield AZ |
| 491837 | Virgin Riv near Hurricane UT |
| 491834 | Virgin Riv near St George UT |
| 251274 | Wading Riv near Norton MA |
| 311458 | Wahoo Creek at Ithaca NE |
| 051365 | War Eagle Creek near Hindsville AR |
| 251276 | Ware Riv at Gibbs Crossing MA |
| 401552 | Washita Riv near Dickson OK |
| 401555 | Washita Riv near Pauls Valley OK |
| 371728 | Watauga River near Sugar Grove NC |
| 491853 | Weber Riv near Oakley UT |
| 491855 | Weber Riv near Wanship UT |
| 532336 | Wenatchee Riv at Peshastin WA |
| 532337 | Wenatchee Riv at Plain WA |
| 191318 | West Fork Ditch at Hornick IA |
| 191319 | West Nishnabotna Riv at Hancock IA |
| 191321 | West Nishnabotna Riv at Randolph IA |
| 251288 | Westfield Riv near Westfield MA |
| 041676 | Wet Beaver Creek near Rimrock AZ |
| 532357 | White Riv at Auburn WA |
| 501184 | White Riv at West Hartford VT |
| 082579 | White Riv blw Boise Creek near Rangely CO |
| 051386 | White Riv near Fayetteville AR |
| 041237 | White Riv near Fort Apache AZ |
| 082582 | White Riv near Meeker CO |
| 532372 | White Salmon Riv near Underwood WA |
| 482346 | Wichita Riv at Wichita Falls TX |
| 231238 | Wild River at Gilead ME |
| 082593 | Williams Fork near Leal CO |
| 241343 | Wills Creek near Cumberland MD |
| 331195 | Winnipesaukee River at Tilton NH |
| 501191 | Winooski River at Montpelier VT |
| 501192 | Winooski River near Essex Junction VT |
| 551593 | Wisconsin Riv at Muscoda WI |
| 551615 | Wolf Riv at New London WI |
| 371738 | Yadkin River at Patterson NC |
| 082632 | Yampa Riv at Steamboat Springs CO |
| 082636 | Yampa Riv below Stagecoach Reservoir CO |
| 082638 | Yampa Riv near Maybell CO |
| 421778 | Yellow Breeches Creek nr Camp Hill PA |
| 421781 | Yellow Creek near Homer City Pa Site 20 PA |
| 302163 | Yellowstone Riv at Billings MT |
| 302169 | Yellowstone Riv at Miles City MT |
| 302174 | Yellowstone Riv near Sidney MT |
| 241345 | Youghiogheny Riv at Friendsville MD |
| 421786 | Youghiogheny Riv below Confluence PA |
| 062737 | Yuba NF below Goodyears Bar CA |