Watershed Boundary Dataset

Region Subregion Basin Subbasin Square Miles 01 -- New England Region 0101 -- St. John 010100 -- St. John 01010001 -- Upper St. John 6650 01010002 -- Allagash 1235 01010003 -- Fish 890 01010004 -- Aroostook 2442 01010005 -- Meduxnekeag 748 0102 -- Penobscot 010200 -- Penobscot 01020001 -- West Branch Penobscot 2132 01020002 -- East Branch Penobscot 1120 01020003 -- Mattawamkeag 1510 01020004 -- Piscataquis 1461 01020005 -- Lower Penobscot 2395 0103 -- Kennebec 010300 -- Kennebec 01030001 -- Upper Kennebec 1587 01030002 -- Dead 877 01030003 -- Lower Kennebec 3431 0104 -- Androscoggin 010400 -- Androscoggin 01040001 -- Upper Androscoggin 1371 01040002 -- Lower Androscoggin 2156 0105 -- Maine Coastal 010500 -- Maine Coastal 01050001 -- St. Croix 1645 01050002 -- Maine Coastal Page 1 of 113 Region Subregion Basin Subbasin Square Miles 5313 01050003 -- St. George-Sheepscot 1367 01050004 -- Passamaquoddy Bay-Bay of Fundy 1973 0106 -- Saco 010600 -- Saco 01060001 -- Presumpscot 1424 01060002 -- Saco 1701 01060003 -- Piscataqua-Salmon Falls 1684 0107 -- Merrimack 010700 -- Merrimack 01070001 -- Pemigewasset 1023 01070002 -- Winnipesaukee River 486 01070003 -- Contoocook 765 01070004 -- Nashua 532 01070005 -- Concord 400 01070006 -- Merrimack River 1801 0108 -- Connecticut 010801 -- Upper Connecticut 01080101 -- Upper Connecticut 1402 01080102 -- Passumpsic 508 01080103 -- Waits 924 01080104 -- Upper Connecticut-Mascoma 517 01080105 -- White 712 01080106 -- Black-Ottauquechee 1322 01080107 -- West 849 010802 -- Lower Connecticut 01080201 -- Middle Connecticut 1018

Page 2 of 113 Region Subregion Basin Subbasin Square Miles 01080202 -- Miller 389 01080203 -- Deerfield 663 01080204 -- Chicopee 723 01080205 -- Lower Connecticut 1085 01080206 -- Westfield 519 01080207 -- Farmington 607 0109 -- Massachusetts-Rhode Island Coastal 010900 -- Massachusetts-Rhode Island Coastal 01090003 -- Blackstone 474 0109 -- Massachusetts-Rhode Island Coastal. 010900 -- Massachusetts-Rhode Island Coastal. 01090001 -- Charles 1013 01090002 -- Cape Cod 1204 01090004 -- Narragansett 1379 01090005 -- Pawcatuck-Wood 369 0110 -- Connecticut Coastal 011000 -- Connecticut Coastal 01100001 -- Quinebaug 739 01100002 -- Shetucket 526 01100003 -- Thames 369 01100004 -- Quinnipiac 512 01100005 -- Housatonic 1950 01100006 -- Saugatuck 449 02 -- Mid Atlantic Region 0202 -- Upper Hudson 020200 -- Upper Hudson 02020001 -- Upper Hudson 1664 02020002 -- Sacandaga

Page 3 of 113 Region Subregion Basin Subbasin Square Miles 1055 02020003 -- Hudson-Hoosic 1906 02020004 -- Mohawk 2551 02020005 -- Schoharie 928 02020006 -- Middle Hudson 2429 02020007 -- Rondout 1188 02020008 -- Hudson-Wappinger 945 0203 -- Lower Hudson-Long Island 020301 -- Lower Hudson 02030101 -- Lower Hudson 750 02030102 -- Bronx 188 02030103 -- Hackensack-Passaic 1134 02030104 -- Sandy Hook-Staten Island 555 02030105 -- Raritan 1105 020302 -- Long Island 02030201 -- Northern Long Island 290 02030202 -- Southern Long Island 2047 02030203 -- Long Island Sound 1190 0204 -- Delaware-Mid Atlantic Coastal 020401 -- Upper Delaware 02040101 -- Upper Delaware 1190 02040102 -- East Branch Delaware 840 02040103 -- Lackawaxen 598 02040104 -- Middle Delaware-Mongaup-Brodhead 1530 02040105 -- Middle Delaware-Musconetcong 1359 02040106 -- Lehigh 1362

Page 4 of 113 Region Subregion Basin Subbasin Square Miles 020402 -- Lower Delaware 02040201 -- Crosswicks-Neshaminy 544 02040202 -- Lower Delaware 1151 02040203 -- Schuylkill 1912 02040204 -- Delaware Bay 414 02040205 -- Brandywine-Christina 756 02040206 -- Cohansey-Maurice 1195 02040207 -- Broadkill-Smyrna 759 020403 -- Mid Atlantic Coastal 02040301 -- Mullica-Toms 1722 02040302 -- Great Egg Harbor 863 02040303 -- Chincoteague 1038 02040304 -- Eastern Lower Delmarva 744 0205 -- Susquehanna 020501 -- Upper Susquehanna 02050101 -- Upper Susquehanna 2289 02050102 -- Chenango 1607 02050103 -- Owego-Wappasening 1045 02050104 -- Tioga 1384 02050105 -- Chemung 1212 02050106 -- Upper Susquehanna-Tunkhannock 2004 02050107 -- Upper Susquehanna-Lackawanna 1766 020502 -- West Branch Susquehanna 02050201 -- Upper West Branch Susquehanna 1597 02050202 -- Sinnemahoning 1034 02050203 -- Middle West Branch Susquehanna

Page 5 of 113 Region Subregion Basin Subbasin Square Miles 784 02050204 -- Bald Eagle 773 02050205 -- Pine 981 02050206 -- Lower West Branch Susquehanna 1810 020503 -- Lower Susquehanna 02050301 -- Lower Susquehanna-Penns 1448 02050302 -- Upper Juniata 991 02050303 -- Raystown 962 02050304 -- Lower Juniata 1450 02050305 -- Lower Susquehanna-Swatara 1877 02050306 -- Lower Susquehanna 2486 0206 -- Upper Chesapeake 020600 -- Upper Chesapeake 02060001 -- Upper Chesapeake Bay 758 02060002 -- Chester-Sassafras 1302 02060003 -- Gunpowder-Patapsco 1417 02060004 -- Severn 369 02060005 -- Choptank 1098 02060006 -- Patuxent 927 0207 -- Potomac 020700 -- Potomac 02070001 -- South Branch Potomac 1480 02070002 -- North Branch Potomac 1343 02070003 -- Cacapon-Town 1205 02070004 -- Conococheague-Opequon 2277 02070005 -- South Fork Shenandoah 1672

Page 6 of 113 Region Subregion Basin Subbasin Square Miles 02070006 -- North Fork Shenandoah 1034 02070007 -- Shenandoah 352 02070008 -- Middle Potomac-Catoctin 1238 02070009 -- Monocacy 969 02070010 -- Middle Potomac-Anacostia-Occoquan 1303 02070011 -- Lower Potomac 1806 0208 -- Lower Chesapeake 020801 -- Lower Chesapeake 02080101 -- Lower Chesapeake Bay 1177 02080102 -- Great Wicomico-Piankatank 671 02080103 -- Rapidan-Upper Rappahannock 1557 02080104 -- Lower Rappahannock 1156 02080105 -- Mattaponi 911 02080106 -- Pamunkey 1472 02080107 -- York 292 02080108 -- Lynnhaven-Poquoson 230 02080109 -- Nanticoke 827 02080110 -- Tangier 971 02080111 -- Pokomoke-Western Lower Delmarva 1076 020802 -- James 02080201 -- Upper James 2212 02080202 -- Maury 838 02080203 -- Middle James-Buffalo 2023 02080204 -- Rivanna 768 02080205 -- Middle James-Willis

Page 7 of 113 Region Subregion Basin Subbasin Square Miles 945 02080206 -- Lower James 1441 02080207 -- Appomattox 1610 02080208 -- Hampton Roads 505 03 -- South Atlantic-Gulf Region 0301 -- Chowan-Roanoke 030101 -- Roanoke 03010101 -- Upper Roanoke 2191 03010102 -- Middle Roanoke 1738 03010103 -- Upper Dan 2055 03010104 -- Lower Dan 1284 03010105 -- Banister 597 03010106 -- Roanoke Rapids 592 03010107 -- Lower Roanoke 1310 030102 -- Albemarle-Chowan 03010201 -- Nottoway 1723 03010202 -- Blackwater 740 03010203 -- Chowan 898 03010204 -- Meherrin 1612 03010205 -- Albemarle 4323 0302 -- Neuse-Pamlico 030201 -- Pamlico 03020101 -- Upper Tar 1305 03020102 -- Fishing 894 03020103 -- Lower Tar 960 03020104 -- Pamlico 1307 03020105 -- Pamlico Sound

Page 8 of 113 Region Subregion Basin Subbasin Square Miles 1952 030202 -- Neuse 03020201 -- Upper Neuse 2406 03020202 -- Middle Neuse 1065 03020203 -- Contentnea 1009 03020204 -- Lower Neuse 1583 030203 -- Onslow Bay 03020301 -- White Oak River 933 03020302 -- New River 891 0303 -- Cape Fear 030300 -- Cape Fear 03030002 -- Haw 1708 03030003 -- Deep 1450 03030004 -- Upper Cape Fear 1630 03030005 -- Lower Cape Fear 1121 03030006 -- Black 1574 03030007 -- Northeast Cape Fear 1741 0304 -- Pee Dee 030401 -- Upper Pee Dee 03040101 -- Upper Yadkin 2455 03040102 -- South Yadkin 907 03040103 -- Lower Yadkin 1190 03040104 -- Upper Pee Dee 869 03040105 -- Rocky 1417 030402 -- Lower Pee Dee 03040201 -- Lower Pee Dee 2532 03040202 -- Lynches 1413

Page 9 of 113 Region Subregion Basin Subbasin Square Miles 03040203 -- Lumber 1753 03040204 -- Little Pee Dee 1368 03040205 -- Black 2061 03040206 -- Waccamaw 1651 03040207 -- Carolina Coastal-Sampit 570 03040208 -- Coastal Carolina 679 0305 -- Edisto-Santee 030501 -- Santee 03050101 -- Upper Catawba 2357 03050102 -- South Fork Catawba 661 03050103 -- Lower Catawba 1334 03050104 -- Wateree 1257 03050105 -- Upper Broad 2478 03050106 -- Lower Broad 1289 03050107 -- Tyger 808 03050108 -- Enoree 732 03050109 -- Saluda 2525 03050110 -- Congaree 690 03050111 -- Lake Marion 549 03050112 -- Santee 761 030502 -- Edisto-South Carolina Coastal 03050201 -- Cooper 1264 03050202 -- South Carolina Coastal 390 03050203 -- North Fork Edisto 760 03050204 -- South Fork Edisto

Page 10 of 113 Region Subregion Basin Subbasin Square Miles 867 03050205 -- Four Hole Swamp 654 03050206 -- Edisto River 940 03050207 -- Salkehatchie 1890 03050208 -- Broad-St. Helena 1000 03050209 -- Bulls Bay 468 03050210 -- St. Helena Island 185 0306 -- Ogeechee-Savannah 030601 -- Savannah 03060101 -- Seneca 1028 03060102 -- Tugaloo 990 03060103 -- Upper Savannah 1839 03060104 -- Broad 1503 03060105 -- Little 768 03060106 -- Middle Savannah 1834 03060107 -- Stevens 740 03060108 -- Brier 849 03060109 -- Lower Savannah 1006 03060110 -- Calibogue Sound-Wright River 430 030602 -- Ogeechee 03060201 -- Upper Ogeechee 1836 03060202 -- Lower Ogeechee 1186 03060203 -- Canoochee 1388 03060204 -- Ogeechee Coastal 1529 0307 -- Altamaha-St. Marys 030701 -- Altamaha

Page 11 of 113 Region Subregion Basin Subbasin Square Miles 03070101 -- Upper Oconee 2915 03070102 -- Lower Oconee 2411 03070103 -- Upper Ocmulgee 2973 03070104 -- Lower Ocmulgee 2325 03070105 -- Little Ocmulgee 804 03070106 -- Altamaha 1663 03070107 -- Ohoopee 1345 030702 -- St. Marys-Satilla 03070201 -- Satilla 2587 03070202 -- Little Satilla 796 03070203 -- Cumberland-St. Simons 954 03070204 -- St. Marys 1583 03070205 -- Nassau 429 0308 -- St. Johns 030801 -- St. Johns 03080101 -- Upper St. Johns 3945 03080102 -- Oklawaha 2777 03080103 -- Lower St. Johns 2784 030802 -- East Florida Coastal 03080201 -- Daytona-St. Augustine 684 03080202 -- Cape Canaveral 710 03080203 -- Vero Beach 487 0309 -- Southern Florida 030901 -- Kissimmee 03090101 -- Kissimmee 2965 03090102 -- Northern Okeechobee Inflow 306

Page 12 of 113 Region Subregion Basin Subbasin Square Miles 03090103 -- Western Okeechobee Inflow 805 030902 -- Southern Florida 03090201 -- Lake Okeechobee 866 03090202 -- Everglades 4424 03090203 -- Florida Bay-Florida Keys 1055 03090204 -- Big Cypress Swamp 2850 03090205 -- Caloosahatchee 1404 03090206 -- Florida Southeast Coast 3128 0310 -- Peace-Tampa Bay 031001 -- Peace 03100101 -- Peace 2342 03100102 -- Myakka 602 03100103 -- Charlotte Harbor 607 031002 -- Tampa Bay 03100201 -- Sarasota Bay 400 03100202 -- Manatee 364 03100203 -- Little Manatee 227 03100204 -- Alafia 422 03100205 -- Hillsborough 656 03100206 -- Tampa Bay 874 03100207 -- Crystal-Pithlachascotee 1174 03100208 -- Withlacoochee 2083 0311 -- Suwannee 031101 -- Aucilla-Waccasassa 03110101 -- Waccasassa 901 03110102 -- Econfina-Steinhatchee 1858

Page 13 of 113 Region Subregion Basin Subbasin Square Miles 03110103 -- Aucilla 953 031102 -- Suwannee 03110201 -- Upper Suwannee 2645 03110202 -- Alapaha 1801 03110203 -- Withlacoochee 1508 03110204 -- Little 891 03110205 -- Lower Suwannee 1580 03110206 -- Santa Fe 1383 0312 -- Ochlockonee 031200 -- Ochlockonee 03120001 -- Apalachee Bay-St. Marks 1181 03120002 -- Upper Ochlockonee 927 03120003 -- Lower Ochlockonee 1557 0313 -- Apalachicola 031300 -- Apalachicola 03130001 -- Upper Chattahoochee 1586 03130002 -- Middle Chattahoochee-Lake Harding 3041 03130003 -- Middle Chattahoochee-Walter F 2837 03130004 -- Lower Chattahoochee 1244 03130005 -- Upper Flint 2630 03130006 -- Middle Flint 1558 03130007 -- Kinchafoonee-Muckalee 1101 03130008 -- Lower Flint 1274 03130009 -- Ichawaynochaway 1104 03130010 -- Spring 789 03130011 -- Apalachicola

Page 14 of 113 Region Subregion Basin Subbasin Square Miles 1117 03130012 -- Chipola 1292 03130013 -- New 514 03130014 -- Apalachicola Bay 268 0314 -- Choctawhatchee-Escambia 031401 -- Florida Panhandle Coastal 03140101 -- St. Andrews-St. Joseph Bays 1349 03140102 -- Choctawhatchee Bay 688 03140103 -- Yellow 1374 03140104 -- Blackwater 865 03140105 -- Pensacola Bay 544 03140106 -- Perdido 920 03140107 -- Perdido Bay 293 031402 -- Choctawhatchee 03140201 -- Upper Choctawhatchee 1543 03140202 -- Pea 1555 03140203 -- Lower Choctawhatchee 1555 031403 -- Escambia 03140301 -- Upper Conecuh 822 03140302 -- Patsaliga 600 03140303 -- Sepulga 1049 03140304 -- Lower Conecuh 1014 03140305 -- Escambia 759 0315 -- Alabama 031501 -- Coosa-Tallapoosa 03150101 -- Conasauga 727 03150102 -- Coosawattee

Page 15 of 113 Region Subregion Basin Subbasin Square Miles 862 03150103 -- Oostanaula 561 03150104 -- Etowah 1861 03150105 -- Upper Coosa 1599 03150106 -- Middle Coosa 2584 03150107 -- Lower Coosa 1962 03150108 -- Upper Tallapoosa 1394 03150109 -- Middle Tallapoosa 1590 03150110 -- Lower Tallapoosa 1703 031502 -- Alabama 03150201 -- Upper Alabama 2391 03150202 -- Cahaba 1824 03150203 -- Middle Alabama 2230 03150204 -- Lower Alabama 1451 0316 -- Mobile-Tombigbee 031601 -- Black Warrior - Tombigbee 03160101 -- Upper Tombigbee 1797 03160102 -- Town 683 03160103 -- Buttahatchee 865 03160104 -- Tibbee 1117 03160105 -- Luxapallila 799 03160106 -- Middle Tombigbee-Lubbub 1631 03160107 -- Sipsey 788 03160108 -- Noxubee 1419 03160109 -- Mulberry 1372

Page 16 of 113 Region Subregion Basin Subbasin Square Miles 03160110 -- Sipsey Fork 997 03160111 -- Locust 1210 03160112 -- Upper Black Warrior 1246 03160113 -- Lower Black Warrior 1453 031602 -- Mobile Bay-Tombigbee 03160201 -- Middle Tombigbee-Chickasaw 2081 03160202 -- Sucarnoochee 974 03160203 -- Lower Tombigbee 1616 03160204 -- Mobile-Tensaw 912 03160205 -- Mobile Bay 873 0317 -- Pascagoula 031700 -- Pascagoula 03170001 -- Chunky-Okatibbee 908 03170002 -- Upper Chickasawhay 1446 03170003 -- Lower Chickasawhay 664 03170004 -- Upper Leaf 1753 03170005 -- Lower Leaf 1825 03170006 -- Pascagoula 610 03170007 -- Black 1267 03170008 -- Escatawpa 1044 03170009 -- Mississippi Coastal 2448 0318 -- Pearl 031800 -- Pearl 03180001 -- Upper Pearl 2463 03180002 -- Middle Pearl-Strong 1977 03180003 -- Middle Pearl-Silver

Page 17 of 113 Region Subregion Basin Subbasin Square Miles 1219 03180004 -- Lower Pearl 1821 03180005 -- Bogue Chitto 1209 04 -- Great Lakes Region 0401 -- Western Lake Superior 040101 -- Northwestern Lake Superior 04010101 -- Baptism-Brule 1587 04010102 -- Beaver-Lester 624 040102 -- St. Louis 04010201 -- St. Louis 2941 04010202 -- Cloquet 794 040103 -- Southwestern Lake Superior 04010301 -- Beartrap-Nemadji 1928 04010302 -- Bad-Montreal 1301 0402 -- Southern Lake Superior-Lake Superior 040201 -- Southcentral Lake Superior 04020101 -- Black-Presque Isle 1019 04020102 -- Ontonagon 1388 04020103 -- Keweenaw Peninsula 1112 04020104 -- Sturgeon 730 04020105 -- Dead-Kelsey 930 040202 -- Southeastern Lake Superior 04020201 -- Betsy-Chocolay 1167 04020202 -- Tahquamenon 810 04020203 -- Waiska 295 040203 -- Lake Superior 04020300 -- Lake Superior 2554 0403 -- Northwestern Lake Michigan 040301 -- Northwestern Lake Michigan

Page 18 of 113 Region Subregion Basin Subbasin Square Miles 04030101 -- Manitowoc-Sheboygan 1630 04030102 -- Door-Kewaunee 766 04030103 -- Duck-Pensaukee 333 04030104 -- Oconto 961 04030105 -- Peshtigo 1219 04030106 -- Brule 1052 04030107 -- Michigamme 724 04030108 -- Menominee 2293 04030109 -- Cedar-Ford 1019 04030110 -- Escanaba 928 04030111 -- Tacoosh-Whitefish 642 04030112 -- Fishdam-Sturgeon 580 040302 -- Fox 04030201 -- Upper Fox 1620 04030202 -- Wolf 3726 04030203 -- Lake Winnebago 572 04030204 -- Lower Fox 648 0404 -- Southwestern Lake Michigan 040400 -- Southwestern Lake Michigan 04040001 -- Little Calumet-Galien 690 04040002 -- Pike-Root 418 04040003 -- Milwaukee 879 0405 -- Southeastern Lake Michigan 040500 -- Southeastern Lake Michigan 04050001 -- St. Joseph 4713 04050002 -- Black-Macatawa

Page 19 of 113 Region Subregion Basin Subbasin Square Miles 608 04050003 -- Kalamazoo 2032 04050004 -- Upper Grand 1760 04050005 -- Maple 946 04050006 -- Lower Grand 2022 04050007 -- Thornapple 849 0406 -- Northeastern Lake Michigan-Lake Michigan 040601 -- Northeastern Lake Michigan 04060101 -- Pere Marquette-White 2083 04060102 -- Muskegon 2727 04060103 -- Manistee 1950 04060104 -- Betsie-Platte 796 04060105 -- Boardman-Charlevoix 1668 04060106 -- Manistique 1471 04060107 -- Brevoort-Millecoquins 553 0407 -- Northwestern Lake Huron 040700 -- Northwestern Lake Huron 04070001 -- St. Marys 439 04070002 -- Carp-Pine 655 04070003 -- Lone Lake-Ocqueoc 824 04070004 -- Cheboygan 894 04070005 -- Black 600 04070006 -- Thunder Bay 1250 04070007 -- Au Sable 2049 0408 -- Southwestern Lake Huron-Lake Huron 040801 -- Southwestern Lake Huron 04080101 -- Au Gres-Rifle

Page 20 of 113 Region Subregion Basin Subbasin Square Miles 1025 04080102 -- Kawkawlin-Pine 486 04080103 -- Pigeon-Wiscoggin 901 04080104 -- Birch-Willow 525 040802 -- Saginaw 04080201 -- Tittabawassee 1447 04080202 -- Pine 1026 04080203 -- Shiawassee 1266 04080204 -- Flint 1330 04080205 -- Cass 908 04080206 -- Saginaw 251 0409 -- St. Clair-Detroit 040900 -- St. Clair-Detroit 04090001 -- St. Clair 1157 04090002 -- Lake St. Clair 256 04090003 -- Clinton 797 04090004 -- Detroit 586 04090005 -- Huron 918 0410 -- Western Lake Erie 041000 -- Western Lake Erie 04100001 -- Ottawa-Stony 697 04100002 -- Raisin 1063 04100003 -- St. Joseph 1094 04100004 -- St. Marys 793 04100005 -- Upper Maumee 387 04100006 -- Tiffin 778

Page 21 of 113 Region Subregion Basin Subbasin Square Miles 04100007 -- Auglaize 1666 04100008 -- Blanchard 772 04100009 -- Lower Maumee 1081 04100010 -- Cedar-Portage 969 04100011 -- Sandusky 1827 04100012 -- Huron-Vermilion 764 0411 -- Southern Lake Erie 041100 -- Southern Lake Erie 04110001 -- Black-Rocky 898 04110002 -- Cuyahoga 811 04110003 -- Ashtabula-Chagrin 634 04110004 -- Grand 706 0412 -- Eastern Lake Erie-Lake Erie 041201 -- Eastern Lake Erie 04120101 -- Chautauqua-Conneaut 867 04120102 -- Cattaraugus 560 04120103 -- Buffalo-Eighteenmile 717 04120104 -- Niagara 799 0413 -- Southwestern Lake Ontario 041300 -- Southwestern Lake Ontario 04130001 -- Oak Orchard-Twelvemile 1034 04130002 -- Upper Genesee 1426 04130003 -- Lower Genesee 1067 0414 -- Southeastern Lake Ontario 041401 -- Southeastern Lake Ontario 04140101 -- Irondequoit-Ninemile 702 04140102 -- Salmon-Sandy 973

Page 22 of 113 Region Subregion Basin Subbasin Square Miles 041402 -- Oswego 04140201 -- Seneca 3460 04140202 -- Oneida 1498 04140203 -- Oswego 145 0415 -- Northeastern Lake Ontario-Lake Ontario-St. Lawrence 041501 -- Northeastern Lake Ontario 04150101 -- Black 1907 04150102 -- Chaumont-Perch 355 041503 -- St. Lawrence 04150301 -- Upper St. Lawrence 392 04150302 -- Oswegatchie 1050 04150303 -- Indian 563 04150304 -- Grass 633 04150305 -- Raquette 1260 04150306 -- St. Regis 869 04150307 -- Salmon 414 04150308 -- Chateaugay-English 1262 041504 -- Lake Champlain-Richelieu River 04150401 -- Mettawee River 687 04150402 -- Otter Creek 943 04150403 -- Winooski River 1063 04150404 -- Ausable River 515 04150405 -- Lamoille River 721 04150406 -- Saranac River 613 04150407 -- Missiquoi River 853 04150408 -- Lake Champlain

Page 23 of 113 Region Subregion Basin Subbasin Square Miles 2793 04150409 -- Richelieu River 1087 041505 -- St. Francois River 04150500 -- St. Francois River 741 05 -- Ohio Region 0501 -- Allegheny 050100 -- Allegheny 05010001 -- Upper Allegheny 2591 05010002 -- Conewango 899 05010003 -- Middle Allegheny-Tionesta 1684 05010004 -- French 1237 05010005 -- Clarion 1249 05010006 -- Middle Allegheny-Redbank 1684 05010007 -- Conemaugh 1373 05010008 -- Kiskiminetas 515 05010009 -- Lower Allegheny 495 0502 -- Monongahela 050200 -- Monongahela 05020001 -- Tygart Valley 1375 05020002 -- West Fork 880 05020003 -- Upper Monongahela 464 05020004 -- Cheat 1422 05020005 -- Lower Monongahela 1474 05020006 -- Youghiogheny 1761 0503 -- Upper Ohio 050301 -- Upper Ohio-Beaver 05030101 -- Upper Ohio 1987 05030102 -- Shenango

Page 24 of 113 Region Subregion Basin Subbasin Square Miles 1067 05030103 -- Mahoning 1140 05030104 -- Beaver 112 05030105 -- Connoquenessing 838 05030106 -- Upper Ohio-Wheeling 1511 050302 -- Upper Ohio-Little Kanawha 05030201 -- Little Muskingum-Middle Island 1815 05030202 -- Upper Ohio-Shade 1417 05030203 -- Little Kanawha 2309 05030204 -- Hocking 1196 0504 -- Muskingum 050400 -- Muskingum 05040001 -- Tuscarawas 2595 05040002 -- Mohican 1005 05040003 -- Walhonding 1251 05040004 -- Muskingum 1566 05040005 -- Wills 853 05040006 -- Licking 780 0505 -- Kanawha 050500 -- Kanawha 05050001 -- Upper New 2942 05050002 -- Middle New 1680 05050003 -- Greenbrier 1645 05050004 -- Lower New 691 05050005 -- Gauley 1421 05050006 -- Upper Kanawha 519

Page 25 of 113 Region Subregion Basin Subbasin Square Miles 05050007 -- Elk 1533 05050008 -- Lower Kanawha 924 05050009 -- Coal 892 0506 -- Scioto 050600 -- Scioto 05060001 -- Upper Scioto 3196 05060002 -- Lower Scioto 2175 05060003 -- Paint 1141 0507 -- Big Sandy-Guyandotte 050701 -- Guyandotte 05070101 -- Upper Guyandotte 940 05070102 -- Lower Guyandotte 740 050702 -- Big Sandy 05070201 -- Tug 1556 05070202 -- Upper Levisa 1213 05070203 -- Lower Levisa 1114 05070204 -- Big Sandy 410 0508 -- Great Miami 050800 -- Great Miami 05080001 -- Upper Great Miami, Indiana, Ohio 2512 05080002 -- Lower Great Miami, Indiana, Ohio 1381 05080003 -- Whitewater 1474 0509 -- Middle Ohio 050901 -- Middle Ohio-Raccoon 05090101 -- Raccoon-Symmes 1459 05090102 -- Twelvepole 442 05090103 -- Little Scioto-Tygarts 1008 05090104 -- Little Sandy

Page 26 of 113 Region Subregion Basin Subbasin Square Miles 724 050902 -- Middle Ohio-Little Miami 05090201 -- Ohio Brush-Whiteoak 2100 05090202 -- Little Miami 1758 05090203 -- Middle Ohio-Laughery 1410 0510 -- Kentucky-Licking 051001 -- Licking 05100101 -- Licking 2778 05100102 -- South Fork Licking 927 051002 -- Kentucky 05100201 -- North Fork Kentucky 1324 05100202 -- Middle Fork Kentucky 559 05100203 -- South Fork Kentucky 748 05100204 -- Upper Kentucky 1094 05100205 -- Lower Kentucky 3241 0511 -- Green 051100 -- Green 05110001 -- Upper Green 3140 05110002 -- Barren 2265 05110003 -- Middle Green 1028 05110004 -- Rough 1081 05110005 -- Lower Green 923 05110006 -- Pond 797 0512 -- Wabash 051201 -- Wabash 05120101 -- Upper Wabash 1633 05120102 -- Salamonie 560 05120103 -- Mississinewa

Page 27 of 113 Region Subregion Basin Subbasin Square Miles 817 05120104 -- Eel 816 05120105 -- Middle Wabash-Deer 669 05120106 -- Tippecanoe 1950 05120107 -- Wildcat 805 05120108 -- Middle Wabash-Little Vermilion 2275 05120109 -- Vermilion 1432 05120110 -- Sugar 811 05120111 -- Middle Wabash-Busseron 2028 05120112 -- Embarras 2436 05120113 -- Lower Wabash 1311 05120114 -- Little Wabash 2142 05120115 -- Skillet 1062 051202 -- Patoka-White 05120201 -- Upper White 2721 05120202 -- Lower White 1673 05120203 -- Eel 1208 05120204 -- Driftwood 1165 05120205 -- Flatrock-Haw 598 05120206 -- Upper East Fork White 812 05120207 -- Muscatatuck 1140 05120208 -- Lower East Fork White 2029 05120209 -- Patoka 862 0513 -- Cumberland 051301 -- Upper Cumberland

Page 28 of 113 Region Subregion Basin Subbasin Square Miles 05130101 -- Upper Cumberland 2331 05130102 -- Rockcastle 764 05130103 -- Upper Cumberland-Lake Cumberland 1882 05130104 -- South Fork Cumberland 1383 05130105 -- Obey 947 05130106 -- Upper Cumberland-Cordell Hull Reservoir 797 05130107 -- Collins 787 05130108 -- Caney 1797 051302 -- Lower Cumberland 05130201 -- Lower Cumberland-Old Hickory Lake 986 05130202 -- Lower Cumberland-Sycamore 647 05130203 -- Stones 936 05130204 -- Harpeth 867 05130205 -- Lower Cumberland 2334 05130206 -- Red 1454 0514 -- Lower Ohio 051401 -- Lower Ohio-Salt 05140101 -- Silver-Little Kentucky 1262 05140102 -- Salt 1469 05140103 -- Rolling Fork 1449 05140104 -- Blue-Sinking 1898 051402 -- Lower Ohio 05140201 -- Lower Ohio-Little Pigeon 1395 05140202 -- Highland-Pigeon 1037 05140203 -- Lower Ohio-Bay 1045

Page 29 of 113 Region Subregion Basin Subbasin Square Miles 05140204 -- Saline 1177 05140205 -- Tradewater 943 05140206 -- Lower Ohio 924 06 -- Tennessee Region 0601 -- Upper Tennessee 060101 -- French Broad-Holston 06010101 -- North Fork Holston 727 06010102 -- South Fork Holston 1179 06010103 -- Watauga, North Carolina, Tennessee 868 06010104 -- Holston 1000 06010105 -- Upper French Broad 1879 06010106 -- Pigeon 689 06010107 -- Lower French Broad 797 06010108 -- Nolichucky 1758 060102 -- Upper Tennessee 06010201 -- Watts Bar Lake 1354 06010202 -- Upper Little Tennessee 837 06010203 -- Tuckasegee 734 06010204 -- Lower Little Tennessee 1055 06010205 -- Upper Clinch, Tennessee, Virginia 1966 06010206 -- Powell 947 06010207 -- Powell 634 06010208 -- Emory 869 0602 -- Middle Tennessee-Hiwassee 060200 -- Middle Tennessee-Hiwassee 06020001 -- Middle Tennessee-Chickamauga 1864

Page 30 of 113 Region Subregion Basin Subbasin Square Miles 06020002 -- Hiwassee 2056 06020003 -- Ocoee 639 06020004 -- Sequatchie 602 0603 -- Middle Tennessee-Elk 060300 -- Middle Tennessee-Elk 06030001 -- Guntersville Lake 1997 06030002 -- Wheeler Lake 2893 06030003 -- Upper Elk 1284 06030004 -- Lower Elk 964 06030005 -- Pickwick Lake 2282 06030006 -- Bear 944 0604 -- Lower Tennessee 060400 -- Lower Tennessee 06040001 -- Lower Tennessee-Beech 2086 06040002 -- Upper Duck 1181 06040003 -- Lower Duck 1547 06040004 -- Buffalo 763 06040005 -- Kentucky Lake 1815 06040006 -- Lower Tennessee 698 07 -- Upper Mississippi Region 0701 -- Mississippi Headwaters 070101 -- Mississippi Headwaters 07010101 -- Mississippi Headwaters 1921 07010102 -- Leech Lake 1341 07010103 -- Prairie-Willow 2084 07010104 -- Elk-Nokasippi 1683 07010105 -- Pine

Page 31 of 113 Region Subregion Basin Subbasin Square Miles 783 07010106 -- Crow Wing 1983 07010107 -- Redeye 894 07010108 -- Long Prairie 883 070102 -- Upper Mississippi-Crow-Rum 07010201 -- Platte-Spunk 1026 07010202 -- Sauk 1042 07010203 -- Clearwater-Elk 1122 07010204 -- Crow 1477 07010205 -- South Fork Crow 1279 07010206 -- Twin Cities 1008 07010207 -- Rum 1585 0702 -- Minnesota 070200 -- Minnesota 07020001 -- Upper Minnesota 2129 07020002 -- Pomme De Terre 875 07020003 -- Lac Qui Parle 1097 07020004 -- Hawk-Yellow Medicine 2082 07020005 -- Chippewa 2078 07020006 -- Redwood 699 07020007 -- Middle Minnesota 1347 07020008 -- Cottonwood 1314 07020009 -- Blue Earth 1566 07020010 -- Watonwan 874 07020011 -- Le Sueur 1112

Page 32 of 113 Region Subregion Basin Subbasin Square Miles 07020012 -- Lower Minnesota 1836 0703 -- St. Croix 070300 -- St. Croix 07030001 -- Upper St. Croix 2026 07030002 -- Namekagon 1019 07030003 -- Kettle 1052 07030004 -- Snake 1006 07030005 -- Lower St. Croix 2616 0704 -- Upper Mississippi-Black-Root 070400 -- Upper Mississippi-Black-Root 07040001 -- Rush-Vermillion 1112 07040002 -- Cannon 1471 07040003 -- Buffalo-Whitewater 1392 07040004 -- Zumbro 1422 07040005 -- Trempealeau 729 07040006 -- La Crosse-Pine 695 07040007 -- Black 2276 07040008 -- Root 1664 0705 -- Chippewa 070500 -- Chippewa 07050001 -- Upper Chippewa 1932 07050002 -- Flambeau 1178 07050003 -- South Fork Flambeau 739 07050004 -- Jump 854 07050005 -- Lower Chippewa 2060 07050006 -- Eau Claire 884

Page 33 of 113 Region Subregion Basin Subbasin Square Miles 07050007 -- Red Cedar 1891 0706 -- Upper Mississippi-Maquoketa-Plum 070600 -- Upper Mississippi-Maquoketa-Plum 07060001 -- Coon-Yellow 1424 07060002 -- Upper Iowa 999 07060003 -- Grant-Little Maquoketa 1119 07060004 -- Turkey 1694 07060005 -- Apple-Plum 1486 07060006 -- Maquoketa 1870 0707 -- Wisconsin 070700 -- Wisconsin 07070001 -- Upper Wisconsin 2180 07070002 -- Lake Dubay 2719 07070003 -- Castle Rock 3249 07070004 -- Baraboo 655 07070005 -- Lower Wisconsin 2361 07070006 -- Kickapoo 768 0708 -- Upper Mississippi-Iowa-Skunk-Wapsipinicon 070801 -- Upper Mississippi-Skunk-Wapsipinicom 07080101 -- Copperas-Duck 992 07080102 -- Upper Wapsipinicon 1568 07080103 -- Lower Wapsipinicon 981 07080104 -- Flint-Henderson 2416 07080105 -- South Skunk 1844 07080106 -- North Skunk 872 07080107 -- Skunk 1634

Page 34 of 113 Region Subregion Basin Subbasin Square Miles 070802 -- Iowa 07080201 -- Upper Cedar 1685 07080202 -- Shell Rock 1080 07080203 -- Winnebago 688 07080204 -- West Fork Cedar 861 07080205 -- Middle Cedar 2417 07080206 -- Lower Cedar 1099 07080207 -- Upper Iowa 1456 07080208 -- Middle Iowa 1657 07080209 -- Lower Iowa 1686 0709 -- Rock 070900 -- Rock 07090001 -- Upper Rock 1893 07090002 -- Middle Rock 1831 07090003 -- Pecatonica 1880 07090004 -- Sugar 761 07090005 -- Lower Rock 2169 07090006 -- Kishwaukee 1255 07090007 -- Green 1129 0710 -- Des Moines 071000 -- Des Moines 07100001 -- Des Moines Headwaters 1247 07100002 -- Upper Des Moines 1076 07100003 -- East Fork Des Moines 1306 07100004 -- Middle Des Moines 1725 07100005 -- Boone

Page 35 of 113 Region Subregion Basin Subbasin Square Miles 908 07100006 -- North Raccoon 2471 07100007 -- South Raccoon 1137 07100008 -- Lake Red Rock 2443 07100009 -- Lower Des Moines 2142 0711 -- Upper Mississippi-Salt 071100 -- Upper Mississippi-Salt 07110001 -- Bear-Wyaconda 1726 07110002 -- North Fabius 916 07110003 -- South Fabius 620 07110004 -- The Sny 1987 07110005 -- North Fork Salt 894 07110006 -- South Fork Salt 1214 07110007 -- Salt 794 07110008 -- Cuivre 1262 07110009 -- Peruque-Piasa 669 0712 -- Upper Illinois 071200 -- Upper Illinois 07120001 -- Kankakee 3029 07120002 -- Iroquois 2137 07120003 -- Chicago 656 07120004 -- Des Plaines 1455 07120005 -- Upper Illinois 1006 07120006 -- Upper Fox 1544 07120007 -- Lower Fox 1103 0713 -- Lower Illinois

Page 36 of 113 Region Subregion Basin Subbasin Square Miles 071300 -- Lower Illinois 07130001 -- Lower Illinois-Senachwine Lake 1960 07130002 -- Vermilion 1333 07130003 -- Lower Illinois-Lake Chautauqua 1623 07130004 -- Mackinaw 1149 07130005 -- Spoon 1865 07130006 -- Upper Sangamon 1441 07130007 -- South Fork Sangamon 1170 07130008 -- Lower Sangamon 892 07130009 -- Salt 1867 07130010 -- La Moine 1349 07130011 -- Lower Illinois 2273 07130012 -- Macoupin 975 0714 -- Upper Mississippi-Kaskaskia-Meramec 071401 -- Upper Mississippi-Meramec 07140101 -- Cahokia-Joachim 1646 07140102 -- Meramec 2150 07140103 -- Bourbeuse 844 07140104 -- Big 970 07140105 -- Upper Mississippi-Cape Girardeau 1727 07140106 -- Big Muddy 2385 07140107 -- Whitewater 1192 07140108 -- Cache 365 071402 -- Kaskaskia 07140201 -- Upper Kaskaskia 1569

Page 37 of 113 Region Subregion Basin Subbasin Square Miles 07140202 -- Middle Kaskaskia 1718 07140203 -- Shoal 916 07140204 -- Lower Kaskaskia 1606 08 -- Lower Mississippi Region 0801 -- Lower Mississippi-Hatchie 080101 -- Lower Mississippi-Memphis 08010100 -- Lower Mississippi-Memphis 1097 080102 -- Hatchie-Obion 08010201 -- Bayou De Chien-Mayfield 970 08010202 -- Obion 1315 08010203 -- South Fork Obion 1158 08010204 -- North Fork Forked Deer 954 08010205 -- South Fork Forked Deer 1061 08010206 -- Forked Deer 71 08010207 -- Upper Hatchie 1146 08010208 -- Lower Hatchie 1464 08010209 -- Loosahatchie 742 08010210 -- Wolf 815 08010211 -- Horn Lake-Nonconnah 279 0802 -- Lower Mississippi-St. Francis 080201 -- Lower Mississippi 08020100 -- Lower Mississippi-Helena 594 080202 -- St. Francis 08020201 -- New Madrid-St. Johns 688 08020202 -- Upper St. Francis 1298 08020203 -- Lower St. Francis 3579 08020204 -- Little River Ditches

Page 38 of 113 Region Subregion Basin Subbasin Square Miles 2605 08020205 -- L'Anguille 955 080203 -- Lower White 08020301 -- Lower White-Bayou Des Arc 1136 08020302 -- Cache 2007 08020303 -- Lower White 1361 08020304 -- Big 947 080204 -- Lower Arkansas 08020401 -- Lower Arkansas 662 08020402 -- Bayou Meto 1002 0803 -- Lower Mississippi-Yazoo 080301 -- Lower Mississippi-Greenville 08030100 -- Lower Mississippi-Greenville 601 080302 -- Yazoo 08030201 -- Little Tallahatchie 1648 08030202 -- Tallahatchie 1056 08030203 -- Yocona 744 08030204 -- Coldwater 1864 08030205 -- Yalobusha 2285 08030206 -- Upper Yazoo 1674 08030207 -- Big Sunflower 3154 08030208 -- Lower Yazoo 200 08030209 -- Deer-Steele 823 0804 -- Lower Red-Ouachita 080401 -- Upper Ouachita 08040101 -- Ouachita Headwaters 1548 08040102 -- Upper Ouachita 1753

Page 39 of 113 Region Subregion Basin Subbasin Square Miles 08040103 -- Little Missouri 2099 080402 -- Lower Ouachita 08040201 -- Lower Ouachita-Smackover 1804 08040202 -- Lower Ouachita-Bayou De Loutre 1313 08040203 -- Upper Saline 1715 08040204 -- Lower Saline 1519 08040205 -- Bayou Bartholomew 1664 08040206 -- Bayou D'arbonne 1921 08040207 -- Lower Ouachita 736 080403 -- Lower Red 08040301 -- Lower Red 907 08040302 -- Castor 957 08040303 -- Dugdemona 934 08040304 -- Little 1003 08040305 -- Black 73 08040306 -- Bayou Cocodrie 557 0805 -- Boeuf-Tensas 080500 -- Boeuf-Tensas 08050001 -- Boeuf 2889 08050002 -- Bayou Macon 1018 08050003 -- Tensas 1390 0806 -- Lower Mississippi-Big Black 080601 -- Lower Mississippi-Natchez 08060100 -- Lower Mississippi-Natchez 692 080602 -- Big Black - Homochitto 08060201 -- Upper Big Black 1479 08060202 -- Lower Big Black

Page 40 of 113 Region Subregion Basin Subbasin Square Miles 1905 08060203 -- Bayou Pierre 1070 08060204 -- Coles Creek 367 08060205 -- Homochitto 1194 08060206 -- Buffalo 371 0807 -- Lower Mississippi-Lake Maurepas 080701 -- Lower Mississippi-Baton Rouge 08070100 -- Lower Mississippi-Baton Rouge 232 080702 -- Lake Maurepas 08070201 -- Bayou Sara-Thompson 695 08070202 -- Amite 1884 08070203 -- Tickfaw 726 08070204 -- Lake Maurepas 713 08070205 -- Tangipahoa 775 080703 -- Lower Grand 08070300 -- Lower Grand 795 0808 -- Louisiana Coastal 080801 -- Atchafalaya-Vermillion 08080101 -- Atchafalaya 1992 08080102 -- Bayou Teche 2213 08080103 -- Vermilion 2012 080802 -- Calcasieu-Mermentau 08080201 -- Mermentau Headwaters 1393 08080202 -- Mermentau 2585 08080203 -- Upper Calcasieu 1510 08080204 -- Whisky Chitto 881 08080205 -- West Fork Calcasieu 752

Page 41 of 113 Region Subregion Basin Subbasin Square Miles 08080206 -- Lower Calcasieu 1271 0809 -- Lower Mississippi 080901 -- Lower Mississippi-New Orleans 08090100 -- Lower Mississippi-New Orleans 855 080902 -- Lake Pontchartrain 08090201 -- Liberty Bayou-Tchefuncta 694 08090202 -- Lake Pontchartrain 640 08090203 -- Eastern Louisiana Coastal 3465 080903 -- Central Louisiana Coastal 08090301 -- East Central Louisiana Coastal 2706 08090302 -- West Central Louisiana Coastal 3119 09 -- Souris-Red-Rainy Region 0901 -- Souris 090100 -- Souris 09010002 -- Des Lacs 1062 09010003 -- Lower Souris 4992 09010004 -- Willow 1794 09010005 -- Deep 1685 09010006 -- Long Creek 1804 09010007 -- Headwaters Souris River 3162 09010008 -- Moose Mountain Creek-Souris River 2642 0902 -- Red 090201 -- Upper Red 09020101 -- Bois De Sioux 1110 09020102 -- Mustinka 860 09020103 -- Otter Tail 1909 09020104 -- Upper Red 655 09020105 -- Western Wild Rice

Page 42 of 113 Region Subregion Basin Subbasin Square Miles 2237 09020106 -- Buffalo 1131 09020107 -- Elm-Marsh 1096 09020108 -- Eastern Wild Rice 1635 09020109 -- Goose 1265 090202 -- Devils Lake-Sheyenne 09020201 -- Devils Lake 3840 09020202 -- Upper Sheyenne 1883 09020203 -- Middle Sheyenne 2019 09020204 -- Lower Sheyenne 1723 09020205 -- Maple 1579 090203 -- Lower Red 09020301 -- Sandhill-Wilson 1177 09020302 -- Red Lakes 1941 09020303 -- Red Lake 1339 09020304 -- Thief 1048 09020305 -- Clearwater 1358 09020306 -- Grand Marais-Red 635 09020307 -- Turtle 683 09020308 -- Forest 936 09020309 -- Snake 778 09020310 -- Park 955 09020311 -- Middle Red 2453 09020312 -- Two Rivers 1101 09020314 -- Roseau

Page 43 of 113 Region Subregion Basin Subbasin Square Miles 2070 09020315 -- Upper Pembina River 1385 09020316 -- Lower Pembina River 2533 0903 -- Rainy 090300 -- Rainy 09030001 -- Rainy Headwaters 6310 09030002 -- Vermilion 1034 09030003 -- Rainy Lake 7411 09030005 -- Little Fork 1874 09030006 -- Big Fork 2056 09030007 -- Rapid 944 09030008 -- Lower Rainy 1535 09030009 -- Lake of the Woods 5732 0904 -- Saskatchewan River 090400 -- Upper South Saskatchewan River 09040001 -- St. Marys 1482 09040002 -- Belly 1906 10 -- Missouri Region 1002 -- Missouri Headwaters 100200 -- Missouri Headwaters 10020001 -- Red Rock 2314 10020002 -- Beaverhead 1502 10020003 -- Ruby 966 10020004 -- Big Hole 2791 10020005 -- Jefferson 1300 10020006 -- Boulder 759 10020007 -- Madison 2556

Page 44 of 113 Region Subregion Basin Subbasin Square Miles 10020008 -- Gallatin 1847 1003 -- Missouri-Marias 100301 -- Upper Missouri 10030101 -- Upper Missouri 3350 10030102 -- Upper Missouri-Dearborn 2602 10030103 -- Smith 2007 10030104 -- Sun 1877 10030105 -- Belt 799 100302 -- Marias 10030201 -- Two Medicine 1287 10030202 -- Cut Bank 1200 10030203 -- Marias 3693 10030204 -- Willow 993 10030205 -- Teton 2049 1004 -- Missouri-Musselshell 100401 -- Fort Peck Lake 10040101 -- Bullwhacker-Dog 1934 10040102 -- Arrow 1272 10040103 -- Judith 2766 10040104 -- Fort Peck Reservoir 5251 10040105 -- Big Dry 1549 10040106 -- Little Dry 1223 100402 -- Musselshell 10040201 -- Upper Musselshell 4016 10040202 -- Middle Musselshell 1924 10040203 -- Flatwillow 680

Page 45 of 113 Region Subregion Basin Subbasin Square Miles 10040204 -- Box Elder 1172 10040205 -- Lower Musselshell 1690 1005 -- Milk 100500 -- Milk 10050001 -- Milk Headwaters 965 10050002 -- Upper Milk 2259 10050003 -- Wild Horse Lake 468 10050004 -- Middle Milk 3512 10050005 -- Big Sandy 807 10050006 -- Sage 990 10050007 -- Lodge 1091 10050008 -- Battle 1718 10050009 -- Peoples 710 10050010 -- Cottonwood 946 10050011 -- Whitewater 1808 10050012 -- Lower Milk 1525 10050013 -- Frenchman 2392 10050014 -- Beaver 1829 10050015 -- Rock 1368 10050016 -- Porcupine 726 1006 -- Missouri-Poplar 100600 -- Missouri-Poplar 10060001 -- Prairie Elk-Wolf 2005 10060002 -- Redwater 2115 10060003 -- Poplar 2320

Page 46 of 113 Region Subregion Basin Subbasin Square Miles 10060004 -- West Fork Poplar 1025 10060005 -- Charlie-Little Muddy 1257 10060006 -- Big Muddy 3436 10060007 -- Brush Lake Closed Basin 1020 1007 -- Upper Yellowstone 100700 -- Upper Yellowstone 10070001 -- Yellowstone Headwaters 2593 10070002 -- Upper Yellowstone 2964 10070003 -- Shields 854 10070004 -- Upper Yellowstone-Lake Basin 1571 10070005 -- Stillwater 1067 10070006 -- Clarks Fork Yellowstone 2793 10070007 -- Upper Yellowstone-Pompeys Pillar 2008 10070008 -- Pryor 602 1008 -- Big Horn 100800 -- Big Horn 10080001 -- Upper Wind 2549 10080002 -- Little Wind 1115 10080003 -- Popo Agie 803 10080004 -- Muskrat 735 10080005 -- Lower Wind 1706 10080006 -- Badwater 856 10080007 -- Upper Bighorn 3473 10080008 -- Nowood 2013 10080009 -- Greybull 1150

Page 47 of 113 Region Subregion Basin Subbasin Square Miles 10080010 -- Big Horn Lake 1802 10080011 -- Dry 436 10080012 -- North Fork Shoshone 854 10080013 -- South Fork Shoshone 651 10080014 -- Shoshone 1485 10080015 -- Lower Bighorn 1961 10080016 -- Little Bighorn 1298 1009 -- Powder-Tongue 100901 -- Tongue 10090101 -- Upper Tongue 2534 10090102 -- Lower Tongue 2873 100902 -- Powder 10090201 -- Middle Fork Powder 981 10090202 -- Upper Powder 2508 10090203 -- South Fork Powder 1217 10090204 -- Salt 807 10090205 -- Crazy Woman 955 10090206 -- Clear 1154 10090207 -- Middle Powder 1065 10090208 -- Little Powder 2027 10090209 -- Lower Powder 1878 10090210 -- Mizpah 804 1010 -- Lower Yellowstone 101000 -- Lower Yellowstone 10100001 -- Lower Yellowstone-Sunday 4805 10100002 -- Big Porcupine

Page 48 of 113 Region Subregion Basin Subbasin Square Miles 873 10100003 -- Rosebud 1308 10100004 -- Lower Yellowstone 5324 10100005 -- O'Fallon 1580 1011 -- Missouri-Little Missouri 101101 -- Lake Sakakawea 10110101 -- Lake Sakakawea 6788 10110102 -- Little Muddy 931 101102 -- Little Missouri 10110201 -- Upper Little Missouri 3473 10110202 -- Boxelder 1194 10110203 -- Middle Little Missouri 2173 10110204 -- Beaver 872 10110205 -- Lower Little Missouri 1804 1012 -- Cheyenne 101201 -- Cheyenne 10120101 -- Antelope 1040 10120102 -- Dry Fork Cheyenne 495 10120103 -- Upper Cheyenne 1437 10120104 -- Lance 1087 10120105 -- Lightning 1003 10120106 -- Angostura Reservoir 1402 10120107 -- Beaver 1665 10120108 -- Hat 968 10120109 -- Middle Cheyenne-Spring 2123 10120110 -- Rapid 715

Page 49 of 113 Region Subregion Basin Subbasin Square Miles 10120111 -- Middle Cheyenne-Elk 1579 10120112 -- Lower Cheyenne 1621 10120113 -- Cherry 1852 101202 -- Belle Fourche 10120201 -- Upper Belle Fourche 2937 10120202 -- Lower Belle Fourche 3246 10120203 -- Redwater 1051 1013 -- Missouri-Oahe 101301 -- Lake Oahe 10130101 -- Painted Woods-Square Butte 2527 10130102 -- Upper Lake Oahe 3636 10130103 -- Apple 3634 10130104 -- Beaver 1036 10130105 -- Lower Lake Oahe 3833 10130106 -- West Missouri Coteau 1627 101302 -- Cannonball-Heart-Knife 10130201 -- Knife 2503 10130202 -- Upper Heart 1714 10130203 -- Lower Heart 1633 10130204 -- Upper Cannonball 1635 10130205 -- Cedar 1786 10130206 -- Lower Cannonball 895 101303 -- Grand-Moreau 10130301 -- North Fork Grand 1246 10130302 -- South Fork Grand 1745 10130303 -- Grand

Page 50 of 113 Region Subregion Basin Subbasin Square Miles 2397 10130304 -- South Fork Moreau 1013 10130305 -- Upper Moreau 1568 10130306 -- Lower Moreau 2658 1014 -- Missouri-White 101401 -- Fort Randall Reservoir 10140101 -- Fort Randall Reservoir 4267 10140102 -- Bad 3176 10140103 -- Medicine Knoll 838 10140104 -- Medicine 693 10140105 -- Crow 1166 101402 -- White 10140201 -- Upper White 3784 10140202 -- Middle White 2433 10140203 -- Little White 1625 10140204 -- Lower White 2106 1015 -- Niobrara 101500 -- Niobrara 10150001 -- Ponca 825 10150002 -- Niobrara Headwaters 1482 10150003 -- Upper Niobrara 4152 10150004 -- Middle Niobrara 3787 10150005 -- Snake 862 10150006 -- Keya Paha 1724 10150007 -- Lower Niobrara 1492 1016 -- James 101600 -- James

Page 51 of 113 Region Subregion Basin Subbasin Square Miles 10160001 -- James Headwaters 1697 10160002 -- Pipestem 1070 10160003 -- Upper James 4472 10160004 -- Elm 1548 10160005 -- Mud 838 10160006 -- Middle James 3708 10160007 -- North Fork Snake 958 10160008 -- Snake 1702 10160009 -- Turtle 1501 10160011 -- Lower James 3640 1017 -- Missouri-Big Sioux 101701 -- Lewis and Clark Lake 10170101 -- Lewis and Clark Lake 3229 10170102 -- Vermillion 2119 10170103 -- Lake Thompson 478 101702 -- Big Sioux 10170201 -- Upper Big Sioux 1633 10170202 -- Middle Big Sioux 2113 10170203 -- Lower Big Sioux 3419 10170204 -- Rock 1679 1018 -- North Platte 101800 -- North Platte 10180001 -- North Platte Headwaters 1424 10180002 -- Upper North Platte 2960 10180003 -- Pathfinder-Seminoe Reservoirs 1031 10180004 -- Medicine Bow

Page 52 of 113 Region Subregion Basin Subbasin Square Miles 1441 10180005 -- Little Medicine Bow 1023 10180006 -- Sweetwater 2901 10180007 -- Middle North Platte-Casper 3473 10180008 -- Glendo Reservoir 2128 10180009 -- Middle North Platte-Scotts Bluff 5155 10180010 -- Upper Laramie 2273 10180011 -- Lower Laramie 2335 10180012 -- Horse 1704 10180013 -- Pumpkin 1028 10180014 -- Lower North Platte 2195 1019 -- South Platte 101900 -- South Platte 10190001 -- South Platte Headwater 1604 10190002 -- Upper South Platte 1850 10190003 -- Middle South Platte-Cherry Creek 2879 10190004 -- Clear 566 10190005 -- St. Vrain 979 10190006 -- Big Thompson 832 10190007 -- Cache La Poudre 1890 10190008 -- Lone Tree-Owl 578 10190009 -- Crow 1390 10190010 -- Kiowa 717 10190011 -- Bijou 1384 10190012 -- Middle South Platte-Sterling

Page 53 of 113 Region Subregion Basin Subbasin Square Miles 2983 10190013 -- Beaver 1106 10190014 -- Pawnee 724 10190015 -- Upper Lodgepole 1182 10190016 -- Lower Lodgepole 1334 10190017 -- Sidney Draw 752 10190018 -- Lower South Platte 1412 1020 -- Platte 102001 -- Middle Platte 10200101 -- Middle Platte-Buffalo 3340 10200102 -- Wood 730 10200103 -- Middle Platte-Prairie 1102 102002 -- Lower Platte 10200201 -- Lower Platte-Shell 858 10200202 -- Lower Platte 525 10200203 -- Salt 1647 1021 -- Loup 102100 -- Loup 10210001 -- Upper Middle Loup 2091 10210002 -- Dismal 1813 10210003 -- Lower Middle Loup 1787 10210004 -- South Loup 1581 10210005 -- Mud 741 10210006 -- Upper North Loup 2349 10210007 -- Lower North Loup 978 10210008 -- Calamus 991

Page 54 of 113 Region Subregion Basin Subbasin Square Miles 10210009 -- Loup 1534 10210010 -- Cedar 1230 1022 -- Elkhorn 102200 -- Elkhorn 10220001 -- Upper Elkhorn 2893 10220002 -- North Fork Elkhorn 849 10220003 -- Lower Elkhorn 2207 10220004 -- Logan 1053 1023 -- Missouri-Little Sioux 102300 -- Missouri-Little Sioux 10230001 -- Blackbird-Soldier 1609 10230002 -- Floyd 916 10230003 -- Little Sioux 2832 10230004 -- Monona-Harrison Ditch 966 10230005 -- Maple 740 10230006 -- Big Papillion-Mosquito 1114 10230007 -- Boyer 1190 1024 -- Missouri-Nishnabotna 102400 -- Missouri-Nishnabotna 10240001 -- Keg-Weeping Water 838 10240002 -- West Nishnabotna 1652 10240003 -- East Nishnabotna 1149 10240004 -- Nishnabotna 175 10240005 -- Tarkio-Wolf 1701 10240006 -- Little Nemaha 893 10240007 -- South Fork Big Nemaha 711

Page 55 of 113 Region Subregion Basin Subbasin Square Miles 10240008 -- Big Nemaha 1210 10240009 -- West Nodaway 795 10240010 -- Nodaway 999 10240011 -- Independence-Sugar 1042 10240012 -- Platte 1664 10240013 -- One Hundred and two 777 1025 -- Republican 102500 -- Republican 10250001 -- Arikaree 1847 10250002 -- North Fork Republican 2949 10250003 -- South Fork Republican 2698 10250004 -- Upper Republican 2155 10250005 -- Frenchman 1647 10250006 -- Stinking Water 1446 10250007 -- Red Willow 794 10250008 -- Medicine 927 10250009 -- Harlan County Reservoir 1349 10250010 -- Upper Sappa 1061 10250011 -- Lower Sappa 653 10250012 -- South Fork Beaver 751 10250013 -- Little Beaver 643 10250014 -- Beaver 732 10250015 -- Prairie Dog 1109 10250016 -- Middle Republican 2171

Page 56 of 113 Region Subregion Basin Subbasin Square Miles 10250017 -- Lower Republican 1979 1026 -- Smoky Hill 102600 -- Smoky Hill 10260001 -- Smoky Hill Headwaters 1053 10260002 -- North Fork Smoky Hill 730 10260003 -- Upper Smoky Hill 1478 10260004 -- Ladder 1417 10260005 -- Hackberry 649 10260006 -- Middle Smoky Hill 1579 10260007 -- Big 862 10260008 -- Lower Smoky Hill 1998 10260009 -- Upper Saline 1921 10260010 -- Lower Saline 1361 10260011 -- Upper North Fork Solomon 1403 10260012 -- Lower North Fork Solomon 1344 10260013 -- Upper South Fork Solomon 1157 10260014 -- Lower South Fork Solomon 1064 10260015 -- Solomon 1897 1027 -- Kansas 102701 -- Kansas 10270101 -- Upper Kansas 537 10270102 -- Middle Kansas 2181 10270103 -- Delaware 1157 10270104 -- Lower Kansas, Kansas 1655 102702 -- Big Blue 10270201 -- Upper Big Blue

Page 57 of 113 Region Subregion Basin Subbasin Square Miles 1108 10270202 -- Middle Big Blue 1264 10270203 -- West Fork Big Blue 1340 10270204 -- Turkey 729 10270205 -- Lower Big Blue 1706 10270206 -- Upper Little Blue 2247 10270207 -- Lower Little Blue 1340 1028 -- Chariton-Grand 102801 -- Grand 10280101 -- Upper Grand 3326 10280102 -- Thompson 2201 10280103 -- Lower Grand 2361 102802 -- Chariton 10280201 -- Upper Chariton 1352 10280202 -- Lower Chariton 1020 10280203 -- Little Chariton 699 1029 -- Gasconade-Osage 102901 -- Osage 10290101 -- Upper Marais Des Cygnes 2176 10290102 -- Lower Marais Des Cygnes 1576 10290103 -- Little Osage 581 10290104 -- Marmaton 1141 10290105 -- Harry S. Truman Reservoir 1204 10290106 -- Sac 1971 10290107 -- Pomme De Terre 846 10290108 -- South Grand 2047

Page 58 of 113 Region Subregion Basin Subbasin Square Miles 10290109 -- Lake of the Ozarks 1387 10290110 -- Niangua 1029 10290111 -- Lower Osage 1078 102902 -- Gasconade 10290201 -- Upper Gasconade 1788 10290202 -- Big Piney 755 10290203 -- Lower Gasconade 1033 1030 -- Lower Missouri 103001 -- Lower Missouri-Blackwater 10300101 -- Lower Missouri-Crooked 2699 10300102 -- Lower Missouri-Moreau 3401 10300103 -- Lamine 1112 10300104 -- Blackwater 1544 103002 -- Lower Missouri 10300200 -- Lower Missouri 1591 11 -- Arkansas-White-Red Region 1101 -- Upper White 110100 -- Upper White 11010001 -- Beaver Reservoir 2555 11010002 -- James 1457 11010003 -- Bull Shoals Lake 2606 11010004 -- Middle White 1476 11010005 -- Buffalo 1340 11010006 -- North Fork White 1831 11010007 -- Upper Black 1925 11010008 -- Current 2619 11010009 -- Lower Black

Page 59 of 113 Region Subregion Basin Subbasin Square Miles 819 11010010 -- Spring 1215 11010011 -- Eleven Point 1203 11010012 -- Strawberry 761 11010013 -- Upper White-Village 740 11010014 -- Little Red 1802 1102 -- Upper Arkansas 110200 -- Upper Arkansas 11020001 -- Arkansas Headwaters 3065 11020002 -- Upper Arkansas 2305 11020003 -- Fountain 928 11020004 -- Chico 724 11020005 -- Upper Arkansas-Lake Meredith 2214 11020006 -- Huerfano 1860 11020007 -- Apishapa 1077 11020008 -- Horse 1425 11020009 -- Upper Arkansas-John Martin Reservoir 3857 11020010 -- Purgatoire 3449 11020011 -- Big Sandy 1851 11020012 -- Rush 1365 11020013 -- Two Butte 806 1103 -- Middel Arkansas 110300 -- Middle Arkansas 11030001 -- Middle Arkansas-Lake McKinney 2300 11030002 -- Whitewoman 1458 11030003 -- Arkansas-Dodge City

Page 60 of 113 Region Subregion Basin Subbasin Square Miles 1019 11030004 -- Coon-Pickerel 1874 11030005 -- Pawnee 1788 11030006 -- Buckner 908 11030007 -- Upper Walnut Creek 928 11030008 -- Lower Walnut Creek 809 11030009 -- Rattlesnake 1246 11030010 -- Gar-Peace 639 11030011 -- Cow 957 11030012 -- Little Arkansas 1423 11030013 -- Middle Arkansas-Slate 908 11030014 -- North Fork Ninnescah 1064 11030015 -- South Fork Ninnescah 811 11030016 -- Ninnescah 409 11030017 -- Upper Walnut River 970 11030018 -- Lower Walnut River 1026 1104 -- Upper Cimarron 110400 -- Upper Cimarron 11040001 -- Cimarron Headwaters 1678 11040002 -- Upper Cimarron 1650 11040003 -- North Fork Cimarron 991 11040004 -- Sand Arroyo 762 11040005 -- Bear 1904 11040006 -- Upper Cimarron-Liberal 1732 11040007 -- Crooked

Page 61 of 113 Region Subregion Basin Subbasin Square Miles 1445 11040008 -- Upper Cimarron-Bluff 1860 1105 -- Lower Cimarron 110500 -- Lower Cimarron 11050001 -- Lower Cimarron-Eagle Chief 2422 11050002 -- Lower Cimarron-Skeleton 3236 11050003 -- Lower Cimarron 1385 1106 -- Arkansas-Keystone 110600 -- Arkansas - Keystone 11060001 -- Kaw Lake 953 11060002 -- Upper Salt Fork Arkansas 1079 11060003 -- Medicine Lodge 1279 11060004 -- Lower Salt Fork Arkansas 2335 11060005 -- Chikaskia 2023 11060006 -- Black Bear-Red Rock 2136 1107 -- Neosho-Verdigris 110701 -- Verdigris 11070101 -- Upper Verdigris 1198 11070102 -- Fall 860 11070103 -- Middle Verdigris 1517 11070104 -- Elk 701 11070105 -- Lower Verdigris 714 11070106 -- Caney 2094 11070107 -- Bird 1137 110702 -- Neosho 11070201 -- Neosho Headwaters 1130 11070202 -- Upper Cottonwood 939

Page 62 of 113 Region Subregion Basin Subbasin Square Miles 11070203 -- Lower Cottonwood 963 11070204 -- Upper Neosho 1361 11070205 -- Middle Neosho 1425 11070206 -- Lake O' The Cherokees 909 11070207 -- Spring 2590 11070208 -- Elk 1026 11070209 -- Lower Neosho 2226 1108 -- Upper Canadian 110800 -- Upper Canadian 11080001 -- Canadian Headwaters 1725 11080002 -- Cimarron 1049 11080003 -- Upper Canadian 2054 11080004 -- Mora 1457 11080005 -- Conchas 1017 11080006 -- Upper Canadian-Ute Reservoir 2239 11080007 -- Ute 2126 11080008 -- Revuelto 806 1109 -- Lower Canadian 110901 -- Middle Candaian 11090101 -- Middle Canadian-Trujillo 1851 11090102 -- Punta de Agua 1500 11090103 -- Rita Blanca 1094 11090104 -- Carrizo 914 11090105 -- Lake Meredith 2022 11090106 -- Middle Canadian-Spring 2754

Page 63 of 113 Region Subregion Basin Subbasin Square Miles 110902 -- Lower Canadian 11090201 -- Lower Canadian-Deer 2042 11090202 -- Lower Canadian-Walnut 1833 11090203 -- Little 977 11090204 -- Lower Canadian 1981 1110 -- North Canadian 111001 -- Upper Beaver 11100101 -- Upper Beaver 2732 11100102 -- Middle Beaver 1356 11100103 -- Coldwater 1962 11100104 -- Palo Duro 1937 111002 -- Lower Beaver 11100201 -- Lower Beaver 1781 11100202 -- Upper Wolf 833 11100203 -- Lower Wolf 1090 111003 -- Lower North Canadian 11100301 -- Middle North Canadian 1858 11100302 -- Lower North Canadian 1870 11100303 -- Deep Fork 2537 1111 -- Lower Arkansas 111101 -- Robert S. Kerr Reservoir 11110101 -- Polecat-Snake 1322 11110102 -- Dirty-Greenleaf 797 11110103 -- Illinois 1654 11110104 -- Robert S. Kerr Reservoir 1762 11110105 -- Poteau 1905 111102 -- Lower Arkansas-Fourche La Fave

Page 64 of 113 Region Subregion Basin Subbasin Square Miles 11110201 -- Frog-Mulberry 1286 11110202 -- Dardanelle Reservoir 1865 11110203 -- Lake Conway-Point Remove 1140 11110204 -- Petit Jean 1099 11110205 -- Cadron 757 11110206 -- Fourche La Fave 1115 11110207 -- Lower Arkansas-Maumelle 1127 1112 -- Red Headwaters 111201 -- Prairie Dog Town Fork Red 11120101 -- Tierra Blanca 1917 11120102 -- Palo Duro 999 11120103 -- Upper Prairie Dog Town Fork Red 2153 11120104 -- Tule 1276 11120105 -- Lower Prairie Dog Town Fork Red 1440 111202 -- Salt Fork Red 11120201 -- Upper Salt Fork Red 741 11120202 -- Lower Salt Fork Red 1247 111203 -- North Fork Red 11120301 -- Upper North Fork Red 1178 11120302 -- Middle North Fork Red 1655 11120303 -- Lower North Fork Red 1384 11120304 -- Elm Fork Red 928 1113 -- Red-Washita 111301 -- Red-Pease 11130101 -- Groesbeck-Sandy 1314 11130102 -- Blue-China 770

Page 65 of 113 Region Subregion Basin Subbasin Square Miles 11130103 -- North Pease 1493 11130104 -- Middle Pease 1370 11130105 -- Pease 802 111302 -- Red-Lake Texoma 11130201 -- Farmers-Mud 2321 11130202 -- Cache 800 11130203 -- West Cache 1100 11130204 -- North Wichita 1097 11130205 -- South Wichita 690 11130206 -- Wichita 1022 11130207 -- Southern Beaver 680 11130208 -- Northern Beaver 864 11130209 -- Little Wichita 1483 11130210 -- Lake Texoma 992 111303 -- Washita 11130301 -- Washita Headwaters 1473 11130302 -- Upper Washita 3209 11130303 -- Middle Washita 2508 11130304 -- Lower Washita 731 1114 -- Red-Sulphur 111401 -- Red-Little 11140101 -- Bois D'arc-Island 1980 11140102 -- Blue 687 11140103 -- Muddy Boggy 1435 11140104 -- Clear Boggy 1003

Page 66 of 113 Region Subregion Basin Subbasin Square Miles 11140105 -- Kiamichi 1822 11140106 -- Pecan-Waterhole 1447 11140107 -- Upper Little 1405 11140108 -- Mountain Fork 846 11140109 -- Lower Little Arkansas, Oklahoma 1989 111402 -- Red-Saline 11140201 -- McKinney-Posten Bayous 883 11140202 -- Middle Red-Coushatta 239 11140203 -- Loggy Bayou 1495 11140204 -- Red Chute 423 11140205 -- Bodcau Bayou 718 11140206 -- Bayou Pierre 1120 11140207 -- Lower Red-Lake Iatt 1426 11140208 -- Saline Bayou 489 11140209 -- Black Lake Bayou 906 111403 -- Big Cypress - Sulphur 11140301 -- Sulphur Headwaters 1148 11140302 -- Lower Sulpher 1824 11140303 -- White Oak Bayou 798 11140304 -- Cross Bayou 779 11140305 -- Lake O'the Pines 885 11140306 -- Caddo Lake 1196 11140307 -- Little Cypress 710 12 -- Texas-Gulf Region 1201 -- Sabine

Page 67 of 113 Region Subregion Basin Subbasin Square Miles 120100 -- Sabine 12010001 -- Upper Sabine 1366 12010002 -- Middle Sabine 2788 12010003 -- Lake Fork 679 12010004 -- Toledo Bend Reservoir 2370 12010005 -- Lower Sabine 2642 1202 -- Neches 120200 -- Neches 12020001 -- Upper Neches 1944 12020002 -- Middle Neches 1608 12020003 -- Lower Neches 1109 12020004 -- Upper Angelina 1616 12020005 -- Lower Angelina 1948 12020006 -- Village 1119 12020007 -- Pine Island Bayou 702 1203 -- Trinity 120301 -- Upper Trinity 12030101 -- Upper West Fork Trinity 1957 12030102 -- Lower West Fork Trinity 1514 12030103 -- Elm Fork Trinity 1858 12030104 -- Denton 719 12030105 -- Upper Trinity 1370 12030106 -- East Fork Trinity 1303 12030107 -- Cedar 1066 12030108 -- Richland 917 12030109 -- Chambers

Page 68 of 113 Region Subregion Basin Subbasin Square Miles 1075 120302 -- Lower Trinity 12030201 -- Lower Trinity-Tehuacana 2106 12030202 -- Lower Trinity-Kickapoo 3258 12030203 -- Lower Trinity 767 1204 -- Galveston Bay-San Jacinto 120401 -- San Jacinto 12040101 -- West Fork San Jacinto 1082 12040102 -- Spring 757 12040103 -- East Fork San Jacinto 995 12040104 -- Buffalo-San Jacinto 1182 120402 -- Galveston Bay-Sabine Lake 12040201 -- Sabine Lake 994 12040202 -- East Galveston Bay 818 12040203 -- North Galveston Bay 357 12040204 -- West Galveston Bay 1091 12040205 -- Austin-Oyster 618 1205 -- Brazos Headwaters 120500 -- Brazos Headwaters 12050001 -- Yellow House Draw 3671 12050002 -- Blackwater Draw 1688 12050003 -- North Fork Double Mountain Fork Brazos 1211 12050004 -- Double Mountain Fork Brazos 2604 12050005 -- Running Water Draw 1514 12050006 -- White 1617 12050007 -- Salt Fork Brazos 2196 1206 -- Middle Brazos

Page 69 of 113 Region Subregion Basin Subbasin Square Miles 120601 -- Middle Brazos-Clear Fork 12060101 -- Middle Brazos-Millers 2520 12060102 -- Upper Clear Fork Brazos 2797 12060103 -- Paint 1066 12060104 -- Lower Clear Fork Brazos 628 12060105 -- Hubbard 1285 120602 -- Middle Brazos-Bosque 12060201 -- Middle Brazos-Palo Pinto 3152 12060202 -- Middle Brazos-Lake Whitney 2498 12060203 -- Bosque 422 12060204 -- North Bosque 1243 1207 -- Lower Brazos 120701 -- Lower Brazos 12070101 -- Lower Brazos-Little Brazos 2697 12070102 -- Yegua 1321 12070103 -- Navasota 2246 12070104 -- Lower Brazos 1643 120702 -- Little 12070201 -- Leon 3021 12070202 -- Cowhouse 727 12070203 -- Lampasas 1512 12070204 -- Little 1003 12070205 -- San Gabriel 1367 1208 -- Upper Colorado 120800 -- Upper Colorado 12080001 -- Lost Draw 1790 12080002 -- Colorado Headwaters

Page 70 of 113 Region Subregion Basin Subbasin Square Miles 2923 12080003 -- Monument-Seminole Draws 2409 12080004 -- Mustang Draw 3106 12080005 -- Johnson Draw 1979 12080006 -- Sulphur Springs Draw 1884 12080007 -- Beals 608 12080008 -- Upper Colorado 1379 1209 -- Lower Colorado-San Bernard Coastal 120901 -- Middle Colorado-Concho 12090101 -- Middle Colorado-Elm 1157 12090102 -- South Concho 1337 12090103 -- Middle Concho 2692 12090104 -- North Concho 1485 12090105 -- Concho 1233 12090106 -- Middle Colorado 2013 12090107 -- Pecan Bayou 1421 12090108 -- Jim Ned 784 12090109 -- San Saba 2296 12090110 -- Brady 804 120902 -- Middle Colorado-Llano 12090201 -- Buchanan-Lyndon B. Johnson Lakes 1270 12090202 -- North Llano 919 12090203 -- South Llano 933 12090204 -- Llano 2614 12090205 -- Austin-Travis Lakes 1241

Page 71 of 113 Region Subregion Basin Subbasin Square Miles 12090206 -- Pedernales 1281 120903 -- Lower Colorado 12090301 -- Lower Colorado-Cummins 2196 12090302 -- Lower Colorado 706 120904 -- San Bernard Coastal 12090401 -- San Bernard 1062 12090402 -- East Matagorda Bay 802 1210 -- Central Texas Coastal 121001 -- Lavaca 12100101 -- Lavaca 910 12100102 -- Navidad 1401 121002 -- Guadalupe 12100201 -- Upper Guadalupe 1433 12100202 -- Middle Guadalupe 2138 12100203 -- San Marcos 1359 12100204 -- Lower Guadalupe 1008 121003 -- San Antonio 12100301 -- Upper San Antonio 507 12100302 -- Medina 1348 12100303 -- Lower San Antonio 1485 12100304 -- Cibolo 854 121004 -- Central Texas Coastal 12100401 -- East Matagorda Bay 1279 12100402 -- West Matagorda Bay 895 12100403 -- East San Antonio Bay 392 12100404 -- West San Antonio Bay 146 12100405 -- Aransas Bay

Page 72 of 113 Region Subregion Basin Subbasin Square Miles 849 12100406 -- Mission 1038 12100407 -- Aransas 858 1211 -- Nueces-Southwestern Texas Coastal 121101 -- Nueces 12110101 -- Nueces Headwaters 817 12110102 -- West Nueces 918 12110103 -- Upper Nueces 1879 12110104 -- Turkey 1558 12110105 -- Middle Nueces 3338 12110106 -- Upper Frio 2341 12110107 -- Hondo 1107 12110108 -- Lower Frio 1221 12110109 -- San Miguel 854 12110110 -- Atascosa 1395 12110111 -- Lower Nueces 1299 121102 -- Southwestern Texas Coastal 12110201 -- North Corpus Christi Bay 174 12110202 -- South Corpus Christi Bay 436 12110203 -- North Laguna Madre 232 12110204 -- San Fernando 1273 12110205 -- Baffin Bay 2130 12110206 -- Palo Blanco 941 12110207 -- Central Laguna Madre 3567 12110208 -- South Laguna Madre 2838

Page 73 of 113 Region Subregion Basin Subbasin Square Miles 13 -- Rio Grande Region 1301 -- Rio Grande Headwaters 130100 -- Rio Grande Headwaters 13010001 -- Rio Grande Headwaters 1381 13010002 -- Alamosa-Trinchera 2539 13010003 -- San Luis 1582 13010004 -- Saguache 1343 13010005 -- Conejos 767 1302 -- Rio Grande-Elephant Butte 130201 -- Upper Rio Grande 13020101 -- Upper Rio Grande 3254 13020102 -- Rio Chama 3158 130202 -- Rio Grande-Elephant Butte 13020201 -- Rio Grande-Santa Fe 1872 13020202 -- Jemez 1039 13020203 -- Rio Grande-Albuquerque 3215 13020204 -- Rio Puerco 2112 13020205 -- Arroyo Chico 1375 13020206 -- North Plains 1207 13020207 -- Rio San Jose 2597 13020208 -- Plains of San Agustin 1991 13020209 -- Rio Salado 1396 13020210 -- Jornada Del Muerto 1711 13020211 -- Elephant Butte Reservoir 2188 1303 -- Rio Grande-Mimbres 130301 -- Rio Grande-Caballo 13030101 -- Caballo 1240

Page 74 of 113 Region Subregion Basin Subbasin Square Miles 13030102 -- El Paso-Las Cruces 2444 13030103 -- Jornada Draw 1250 130302 -- Mimbres 13030200 -- Mimbres 4 13030201 -- Playas Lake 1678 13030202 -- Mimbres 4523 1304 -- Rio Grande-Amistad 130401 -- Rio Grande-Fort Quitman 13040100 -- Rio Grande-Fort Quitman 1792 130402 -- Rio Grande-Amistad 13040201 -- Cibolo-Red Light 2188 13040202 -- Alamito 1562 13040203 -- Black Hills-Fresno 612 13040204 -- Terlingua 1101 13040205 -- Big Bend 1057 13040206 -- Maravillas 1313 13040207 -- Santiago Draw 873 13040208 -- Reagan-Sanderson 721 13040209 -- San Francisco 1024 13040210 -- Lozier Canyon 884 13040211 -- Big Canyon 805 13040212 -- Amistad Reservoir 406 130403 -- Devils 13040301 -- Upper Devils 2643 13040302 -- Lower Devils 873 13040303 -- Dry Devils

Page 75 of 113 Region Subregion Basin Subbasin Square Miles 729 1305 -- Rio Grande Closed Basins 130500 -- Rio Grande Closed Basins 13050001 -- Western Estancia 2425 13050002 -- Eastern Estancia 515 13050003 -- Tularosa Valley 6711 13050004 -- Salt Basin 7921 1306 -- Upper Pecos 130600 -- Upper Pecos 13060001 -- Pecos Headwaters 3481 13060002 -- Pintada Arroyo 1030 13060003 -- Upper Pecos 4207 13060004 -- Taiban 806 13060005 -- Arroyo Del Macho 1872 13060006 -- Gallo Arroyo 872 13060007 -- Upper Pecos-Long Arroyo 3201 13060008 -- Rio Hondo 1663 13060009 -- Rio Felix 944 13060010 -- Rio Penasco 1072 13060011 -- Upper Pecos-Black 4382 1307 -- Lower Pecos 130700 -- Lower Pecos 13070001 -- Lower Pecos-Red Bluff Reservoir 2492 13070002 -- Delaware 787 13070003 -- Toyah 1125 13070004 -- Salt Draw 1959 13070005 -- Barrilla Draw

Page 76 of 113 Region Subregion Basin Subbasin Square Miles 707 13070006 -- Coyanosa-Hackberry Draws 1480 13070007 -- Landreth-Monument Draws 6337 13070008 -- Pecos 1916 13070009 -- Tunas 967 13070010 -- Independence 771 13070011 -- Howard Draw 1092 13070012 -- Lower Pecos 994 1308 -- Rio Grande-Falcon 130800 -- Rio Grande-Falcon 13080001 -- Elm-Sycamore 1570 13080002 -- San Ambrosia-Santa Isabel 1731 13080003 -- International Falcon Reservoir 1803 1309 -- Lower Rio Grande 130900 -- Lower Rio Grande 13090001 -- Los Olmos 1154 13090002 -- Lower Rio Grande 81 14 -- Upper Colorado Region 1401 -- Colorado Headwaters 140100 -- Colorado Headwaters 14010001 -- Colorado Headwaters 2902 14010002 -- Blue 683 14010003 -- Eagle 972 14010004 -- Roaring Fork 1455 14010005 -- Colorado Headwaters-Plateau 3826 1402 -- Gunnison 140200 -- Gunnison 14020001 -- East-Taylor 767

Page 77 of 113 Region Subregion Basin Subbasin Square Miles 14020002 -- Upper Gunnison 2411 14020003 -- Tomichi 1103 14020004 -- North Fork Gunnison 969 14020005 -- Lower Gunnison 1663 14020006 -- Uncompahange 1115 1403 -- Upper Colorado-Dolores 140300 -- Upper Colorado-Dolores 14030001 -- Westwater Canyon 1455 14030002 -- Upper Dolores 2157 14030003 -- San Miguel 1553 14030004 -- Lower Dolores 923 14030005 -- Upper Colorado-Kane Springs 2275 1404 -- Great Divide-Upper Green 140401 -- Upper Green 14040101 -- Upper Green 2941 14040102 -- New Fork 1254 14040103 -- Upper Green-Slate 1513 14040104 -- Big Sandy 1793 14040105 -- Bitter 2229 14040106 -- Upper Green-Flaming Gorge Reservoir 2501 14040107 -- Blacks Fork 2744 14040108 -- Muddy 965 14040109 -- Vermilion 975 140402 -- Great Divide Closed Basin 14040200 -- Great Divide Closed Basin 3841 1405 -- White-Yampa

Page 78 of 113 Region Subregion Basin Subbasin Square Miles 140500 -- White-Yampa 14050001 -- Upper Yampa 2620 14050002 -- Lower Yampa 1569 14050003 -- Little Snake 3060 14050004 -- Muddy 1007 14050005 -- Upper White 1364 14050006 -- Piceance-Yellow 914 14050007 -- Lower White 2725 1406 -- Lower Green 140600 -- Lower Green 14060001 -- Lower Green-Diamond 981 14060002 -- Ashley-Brush 645 14060003 -- Duchesne 2679 14060004 -- Strawberry 1165 14060005 -- Lower Green-Desolation Canyon 1946 14060006 -- Willow 954 14060007 -- Price 1887 14060008 -- Lower Green 1867 14060009 -- San Rafael 2433 1407 -- Upper Colorado-Dirty Devil 140700 -- Upper Colorado-Dirty Devil 14070001 -- Upper Lake Powell 2860 14070002 -- Muddy 1551 14070003 -- Fremont 1980 14070004 -- Dirty Devil 843 14070005 -- Escalante

Page 79 of 113 Region Subregion Basin Subbasin Square Miles 2026 14070006 -- Lower Lake Powell 2937 14070007 -- Paria 1419 1408 -- San Juan 140801 -- Upper San Juan 14080101 -- Upper San Juan 3431 14080102 -- Piedra 676 14080103 -- Blanco Canyon 1714 14080104 -- Animas 1370 14080105 -- Middle San Juan 1945 14080106 -- Chaco 4574 14080107 -- Mancos 803 140802 -- Lower San Juan 14080201 -- Lower San Juan-Four Corners 1994 14080202 -- Mcelmo 717 14080203 -- Montezuma 1169 14080204 -- Chinle 4099 14080205 -- Lower San Juan 2439 15 -- Lower Colorado Region 1501 -- Lower Colorado-Lake Mead 150100 -- Lower Colorado-Lake Mead 15010001 -- Lower Colorado-Marble Canyon 1468 15010002 -- Grand Canyon 2551 15010003 -- Kanab 2363 15010004 -- Havasu Canyon 2934 15010005 -- Lake Mead 2895 15010006 -- Grand Wash

Page 80 of 113 Region Subregion Basin Subbasin Square Miles 934 15010007 -- Red Lake 1414 15010008 -- Upper Virgin 2183 15010009 -- Fort Pearce Wash 1671 15010010 -- Lower Virgin 2061 15010011 -- White 2875 15010012 -- Muddy 1812 15010013 -- Meadow Valley Wash 2537 15010014 -- Detrital Wash 693 15010015 -- Las Vegas Wash 1879 1502 -- Little Colorado 150200 -- Little Colorado 15020001 -- Little Colorado Headwaters 805 15020002 -- Upper Little Colorado 1621 15020003 -- Carrizo Wash 2259 15020004 -- Zuni 2668 15020005 -- Silver 949 15020006 -- Upper Peurco 1912 15020007 -- Lower Peurco 1116 15020008 -- Middle Little Colorado 2525 15020009 -- Leroux Wash 813 15020010 -- Chevelon Canyon 820 15020011 -- Cottonwood Wash 1677 15020012 -- Corn-Oraibi 732 15020013 -- Polacca Wash

Page 81 of 113 Region Subregion Basin Subbasin Square Miles 1156 15020014 -- Jadito Wash 939 15020015 -- Canyon Diablo 1199 15020016 -- Lower Little Colorado 2395 15020017 -- Dinnebito Wash 819 15020018 -- Moenkopi Wash 2652 1503 -- Lower Colorado 150301 -- Lower Colorado 15030101 -- Havasu-Mohave Lakes 2783 15030102 -- Piute Wash 1027 15030103 -- Sacramento Wash 1332 15030104 -- Imperial Reservoir 3444 15030105 -- Bouse Wash 1616 15030106 -- Tyson Wash 714 15030107 -- Lower Colorado 273 15030108 -- Yuma Desert 631 150302 -- Bill Williams 15030201 -- Big Sandy 2153 15030202 -- Burro 713 15030203 -- Santa Maria 1433 15030204 -- Bill Williams 1075 1504 -- Upper Gila 150400 -- Upper Gila 15040001 -- Upper Gila 1982 15040002 -- Upper Gila-Mangas 2048 15040003 -- Animas Valley 2264

Page 82 of 113 Region Subregion Basin Subbasin Square Miles 15040004 -- San Francisco 2802 15040005 -- Upper Gila-San Carlos Reservoir 2769 15040006 -- San Simon 2251 15040007 -- San Carlos 1076 1505 -- Middle Gila 150501 -- Middle Gila 15050100 -- Middle Gila 3328 150502 -- San Pedro-Willcox 15050201 -- Willcox Playa 1654 15050202 -- Upper San Pedro 1788 15050203 -- Lower San Pedro 1982 150503 -- Santa Cruz 15050301 -- Upper Santa Cruz 2229 15050302 -- Rillito 921 15050303 -- Lower Santa Cruz 1683 15050304 -- Brawley Wash 1409 15050305 -- Aguirre Valley 733 15050306 -- Santa Rosa Wash 1209 1506 -- Salt 150601 -- Salt 15060101 -- Black 1251 15060102 -- White 638 15060103 -- Upper Salt 2154 15060104 -- Carrizo 710 15060105 -- Tonto 1049 15060106 -- Lower Salt 998

Page 83 of 113 Region Subregion Basin Subbasin Square Miles 150602 -- Verde 15060201 -- Big Chino-Williamson Valley 2154 15060202 -- Upper Verde 2508 15060203 -- Lower Verde 1967 1507 -- Lower Gila 150701 -- Lower Gila-Agua Fria 15070101 -- Lower Gila-Painted Rock Reservoir 2010 15070102 -- Aqua Fria 2767 15070103 -- Hassayampa 1457 15070104 -- Centennial Wash 1931 150702 -- Lower Gila 15070201 -- Lower Gila 4192 15070202 -- Tenmile Wash 1075 15070203 -- San Cristobal Wash 1646 1508 -- Sonora 150801 -- Rio Sonoyta 15080101 -- San Simon Wash 2156 15080102 -- Rio Sonoyta 424 15080103 -- Tule Desert 497 150802 -- Rio De La Concepcion 15080200 -- Rio De La Concepcion 129 150803 -- Rio De Bavispe 15080301 -- Whitewater Draw 1205 15080302 -- San Bernardino Valley 432 15080303 -- Cloverdale 147 16 -- Great Basin Region 1601 -- Bear 160101 -- Upper Bear 16010101 -- Upper Bear

Page 84 of 113 Region Subregion Basin Subbasin Square Miles 2009 16010102 -- Central Bear 820 160102 -- Lower Bear 16010201 -- Bear Lake 1267 16010202 -- Middle Bear 1283 16010203 -- Little Bear-Logan 884 16010204 -- Lower Bear-Malad 1252 1602 -- Great Salt Lake 160201 -- Weber 16020101 -- Upper Weber 1164 16020102 -- Lower Weber 1321 160202 -- Jordan 16020201 -- Utah Lake 1345 16020202 -- Spanish Fork 963 16020203 -- Provo 686 16020204 -- Jordan 814 160203 -- Great Salt Lake 16020301 -- Hamlin-Snake Valleys 3116 16020302 -- Pine Valley 732 16020303 -- Tule Valley 951 16020304 -- Rush-Tooele Valleys 1208 16020305 -- Skull Valley 813 16020306 -- Southern Great Salt Lake Desert 5474 16020307 -- Pilot-Thousand Springs, Nevada, Utah 1533 16020308 -- Northern Great Salt Lake Desert 4557 16020309 -- Curlew Valley 2261

Page 85 of 113 Region Subregion Basin Subbasin Square Miles 16020310 -- Great Salt Lake 1748 1603 -- Escalante Desert-Sevier Lake 160300 -- Escalante Desert-Sevier Lake 16030001 -- Upper Sevier 1203 16030002 -- East Fork Sevier 1242 16030003 -- Middle Sevier 1852 16030004 -- San Pitch 861 16030005 -- Lower Sevier 4101 16030006 -- Escalante Desert 3291 16030007 -- Beaver Bottoms-Upper Beaver 1727 16030008 -- Lower Beaver 803 16030009 -- Sevier Lake 1395 1604 -- Black Rock Desert-Humboldt 160401 -- Humboldt 16040101 -- Upper Humboldt 2754 16040102 -- North Fork Humboldt 999 16040103 -- South Fork Humboldt 1306 16040104 -- Pine 1006 16040105 -- Middle Humboldt 3199 16040106 -- Rock 907 16040107 -- Reese 2378 16040108 -- Lower Humboldt 2594 16040109 -- Little Humboldt 1781 160402 -- Black Rock Desert 16040201 -- Upper Quinn 3524 16040202 -- Lower Quinn

Page 86 of 113 Region Subregion Basin Subbasin Square Miles 3275 16040203 -- Smoke Creek Desert 2462 16040204 -- Massacre Lake 1296 16040205 -- Thousand-Virgin 1158 1605 -- Central Lahontan 160501 -- Truckee 16050101 -- Lake Tahoe 507 16050102 -- Truckee 1217 16050103 -- Pyramid-Winnemucca Lakes 1385 16050104 -- Granite Springs Valley 1662 160502 -- Carson 16050201 -- Upper Carson 959 16050202 -- Middle Carson 830 16050203 -- Carson Desert 2175 160503 -- Walker 16050301 -- East Walker 1201 16050302 -- West Walker 1042 16050303 -- Walker 894 16050304 -- Walker Lake 808 1606 -- Central Nevada Desert Basins 160600 -- Central Nevada Desert Basins 16060001 -- Dixie Valley 4043 16060002 -- Gabbs Valley 2081 16060003 -- Southern Big Smoky Valley 2050 16060004 -- Northern Big Smoky Valley 1908 16060005 -- Diamond-Monitor Valleys 3123 16060006 -- Little Smoky-Newark Valleys

Page 87 of 113 Region Subregion Basin Subbasin Square Miles 1445 16060007 -- Long-Ruby Valleys 4115 16060008 -- Spring-Steptoe Valleys 5316 16060009 -- Dry Lake Valley 2169 16060010 -- Fish Lake-Soda Spring Valleys 2760 16060011 -- Ralston-Stone Cabin Valleys 3241 16060012 -- Hot Creek-Railroad Valleys 4720 16060013 -- Cactus-Sarcobatus Flats 2757 16060014 -- Sand Spring-Tikaboo Valleys 5131 16060015 -- Ivanpah-Pahrump Valleys 2863 17 -- Pacific Northwest Region 1701 -- Kootenai-Pend Oreille-Spokane 170101 -- Kootenai 17010101 -- Middle Kootenai 3682 17010102 -- Fisher 843 17010103 -- Yaak 792 17010104 -- Lower Kootenai 3745 17010105 -- Moyie 784 17010106 -- Elk 1704 170102 -- Pend Oreille 17010201 -- Upper Clark Fork 1875 17010202 -- Flint-Rock 1820 17010203 -- Blackfoot 2313 17010204 -- Middle Clark Fork 1985 17010205 -- Bitterroot 2858 17010206 -- North Fork Flathead

Page 88 of 113 Region Subregion Basin Subbasin Square Miles 1567 17010207 -- Middle Fork Flathead 1135 17010208 -- Flathead Lake 1191 17010209 -- South Fork Flathead 1676 17010210 -- Stillwater 779 17010211 -- Swan 729 17010212 -- Lower Flathead 2009 17010213 -- Lower Clark Fork 2337 17010214 -- Pend Oreille Lake 1213 17010215 -- Priest 981 17010216 -- Pend Oreille 1634 170103 -- Spokane 17010301 -- Upper Coeur d'Alene 897 17010302 -- South Fork Coeur d'Alene 299 17010303 -- Coeur d'Alene Lake 659 17010304 -- St. Joe 1846 17010305 -- Upper Spokane 588 17010306 -- Hangman 692 17010307 -- Lower Spokane 893 17010308 -- Little Spokane 709 1702 -- Upper Columbia 170200 -- Upper Columbia 17020001 -- Franklin D. Roosevelt Lake 4061 17020002 -- Kettle 4184 17020003 -- Colville 1017

Page 89 of 113 Region Subregion Basin Subbasin Square Miles 17020004 -- Sanpoil 981 17020005 -- Chief Joseph 1339 17020006 -- Okanogan 4680 17020007 -- Similkameen 3579 17020008 -- Methow 1819 17020009 -- Lake Chelan 932 17020010 -- Upper Columbia-Entiat 1498 17020011 -- Wenatchee 1329 17020012 -- Moses Coulee 931 17020013 -- Upper Crab 1857 17020014 -- Banks Lake 616 17020015 -- Lower Crab 2481 17020016 -- Upper Columbia-Priest Rapids 2091 1703 -- Yakima 170300 -- Yakima 17030001 -- Upper Yakima 2139 17030002 -- Naches 1105 17030003 -- Lower Yakima 2906 1704 -- Upper Snake 170401 -- Snake Headwaters 17040101 -- Snake Headwaters 1711 17040102 -- Gros Ventre 624 17040103 -- Greys-Hobock 1582 17040104 -- Palisades 910 17040105 -- Salt 891

Page 90 of 113 Region Subregion Basin Subbasin Square Miles 170402 -- Upper Snake 17040201 -- Idaho Falls 563 17040202 -- Upper Henrys 1096 17040203 -- Lower Henrys 1126 17040204 -- Teton 1114 17040205 -- Willow 693 17040206 -- American Falls 2159 17040207 -- Blackfoot 1270 17040208 -- Portneuf 1677 17040209 -- Lake Walcott 3360 17040210 -- Raft 1475 17040211 -- Goose 1079 17040212 -- Upper Snake-Rock 2549 17040213 -- Salmon Falls 2193 17040214 -- Beaver-Camas 1270 17040215 -- Medicine Lodge 1161 17040216 -- Birch 608 17040217 -- Little Lost 964 17040218 -- Big Lost 2454 17040219 -- Big Wood 1434 17040220 -- Camas 687 17040221 -- Little Wood 1222 1705 -- Middle Snake 170501 -- Middle Snake-Boise 17050101 -- C.J. Strike Reservoir

Page 91 of 113 Region Subregion Basin Subbasin Square Miles 2082 17050102 -- Bruneau 3378 17050103 -- Middle Snake-Succor 2342 17050104 -- Upper Owyhee 2143 17050105 -- South Fork Owyhee 1875 17050106 -- East Little Owyhee 925 17050107 -- Middle Owyhee 1495 17050108 -- Jordan 1307 17050109 -- Crooked-Rattlesnake 1329 17050110 -- Lower Owyhee 1975 17050111 -- North and Middle Forks Boise 760 17050112 -- Boise-Mores 621 17050113 -- South Fork Boise 1306 17050114 -- Lower Boise 1328 17050115 -- Middle Snake-Payette 290 17050116 -- Upper Malheur 2428 17050117 -- Lower Malheur 948 17050118 -- Bully 586 17050119 -- Willow 760 17050120 -- South Fork Payette 820 17050121 -- Middle Fork Payette 339 17050122 -- Payette 1224 17050123 -- North Fork Payette 928 17050124 -- Weiser

Page 92 of 113 Region Subregion Basin Subbasin Square Miles 1685 170502 -- Middle Snake-Powder 17050201 -- Brownlee Reservoir 1303 17050202 -- Burnt 1099 17050203 -- Powder 1708 1706 -- Lower Snake 170601 -- Lower Snake 17060101 -- Hells Canyon 541 17060102 -- Imnaha 851 17060103 -- Lower Snake-Asotin 696 17060104 -- Upper Grande Ronde 1636 17060105 -- Wallowa 954 17060106 -- Lower Grande Ronde 1518 17060107 -- Lower Snake-Tucannon 1459 17060108 -- Palouse 2324 17060109 -- Rock 955 17060110 -- Lower Snake 725 170602 -- Salmon 17060201 -- Upper Salmon 2424 17060202 -- Pahsimeroi 830 17060203 -- Middle Salmon-Panther 1822 17060204 -- Lemhi 1261 17060205 -- Upper Middle Fork Salmon 1502 17060206 -- Lower Middle Fork Salmon 1375 17060207 -- Middle Salmon-Chamberlain 1713 17060208 -- South Fork Salmon

Page 93 of 113 Region Subregion Basin Subbasin Square Miles 1310 17060209 -- Lower Salmon 1180 17060210 -- Little Salmon 577 170603 -- Clearwater 17060301 -- Upper Selway 984 17060302 -- Lower Selway 1027 17060303 -- Lochsa 1182 17060304 -- Middle Fork Clearwater 218 17060305 -- South Fork Clearwater 1179 17060306 -- Clearwater 2356 17060307 -- Upper North Fork Clearwater 1297 17060308 -- Lower North Fork Clearwater 1147 1707 -- Middle Columbia 170701 -- Middle Columbia 17070101 -- Middle Columbia-Lake Wallula 2565 17070102 -- Walla Walla 1776 17070103 -- Umatilla 2526 17070104 -- Willow 867 17070105 -- Middle Columbia-Hood 2158 17070106 -- Klickitat 1352 170702 -- John Day 17070201 -- Upper John Day 2139 17070202 -- North Fork John Day 1848 17070203 -- Middle Fork John Day 792 17070204 -- Lower John Day 3149 170703 -- Deschutes

Page 94 of 113 Region Subregion Basin Subbasin Square Miles 17070301 -- Upper Deschutes 2154 17070302 -- Little Deschutes 1053 17070303 -- Beaver-South Fork 1530 17070304 -- Upper Crooked 1156 17070305 -- Lower Crooked 1848 17070306 -- Lower Deschutes 2296 17070307 -- Trout 692 1708 -- Lower Columbia 170800 -- Lower Columbia 17080001 -- Lower Columbia-Sandy 874 17080002 -- Lewis 1051 17080003 -- Lower Columbia-Clatskanie 907 17080004 -- Upper Cowlitz 1025 17080005 -- Lower Cowlitz 1451 17080006 -- Lower Columbia 677 1709 -- Willamette 170900 -- Willamette 17090001 -- Middle Fork Willamette 1367 17090002 -- Coast Fork Willamette 666 17090003 -- Upper Willamette 1873 17090004 -- Mckenzie 1339 17090005 -- North Santiam 764 17090006 -- South Santiam 1041 17090007 -- Middle Willamette 711 17090008 -- Yamhill 772

Page 95 of 113 Region Subregion Basin Subbasin Square Miles 17090009 -- Molalla-Pudding 875 17090010 -- Tualatin 709 17090011 -- Clackamas 943 17090012 -- Lower Willamette 644 1710 -- Oregon-Washington Coastal 171001 -- Washington Coastal 17100101 -- Hoh-Quillayute 1509 17100102 -- Queets-Quinault 1363 17100103 -- Upper Chehalis 1299 17100104 -- Lower Chehalis 818 17100105 -- Grays Harbor 587 17100106 -- Willapa Bay 1268 171002 -- Northern Oregon Coastal 17100201 -- Necanicum 316 17100202 -- Nehalem 855 17100203 -- Wilson-Trusk-Nestuccu 1139 17100204 -- Siletz-Yaquina 877 17100205 -- Alsea 839 17100206 -- Siuslaw 775 17100207 -- Siltcoos 206 171003 -- Southern Oregon Coastal 17100301 -- North Umpqua 1374 17100302 -- South Umpqua 1801 17100303 -- Umpqua 1514 17100304 -- Coos 900

Page 96 of 113 Region Subregion Basin Subbasin Square Miles 17100305 -- Coquille 1057 17100306 -- Sixes 753 17100307 -- Upper Rogue 1615 17100308 -- Middle Rogue 882 17100309 -- Applegate 770 17100310 -- Lower Rogue 907 17100311 -- Illinois 990 17100312 -- Chetco 775 1711 -- Puget Sound 171100 -- Puget Sound 17110001 -- Sumas River 626 17110002 -- Strait of Georgia 1107 17110003 -- San Juan Islands 1209 17110004 -- Nooksack 1019 17110005 -- Upper Skagit 2010 17110006 -- Sauk 732 17110007 -- Lower Skagit 453 17110008 -- Stillaguamish 702 17110009 -- Skykomish 835 17110010 -- Snoqualmie 694 17110011 -- Snohomish 292 17110012 -- Lake Washington 597 17110013 -- Duwamish 496 17110014 -- Puyallup 985

Page 97 of 113 Region Subregion Basin Subbasin Square Miles 17110015 -- Nisqually 770 17110016 -- Deschutes 170 17110017 -- Skokomish 245 17110018 -- Hood Canal 949 17110019 -- Puget Sound 2453 17110020 -- Dungeness-Elwha 1635 17110021 -- Crescent-Hoko 2469 1712 -- Oregon Closed Basins 171200 -- Oregon Closed Basins 17120001 -- Harney-Malheur Lakes 1452 17120002 -- Silvies 1318 17120003 -- Donner Und Blitzen 790 17120004 -- Silver 1684 17120005 -- Summer Lake 4134 17120006 -- Lake Abert 1031 17120007 -- Warner Lakes 1895 17120008 -- Guano 2978 17120009 -- Alvord Lake 2146 18 -- California Region 1801 -- Klamath-Northern California Coastal 180101 -- Northern California Coastal 18010101 -- Smith 981 18010102 -- Mad-Redwood 1422 18010103 -- Upper Eel 709 18010104 -- Middle Fork Eel 753 18010105 -- Lower Eel

Page 98 of 113 Region Subregion Basin Subbasin Square Miles 1530 18010106 -- South Fork Eel 689 18010107 -- Mattole 747 18010108 -- Big-Navarro-Garcia 1602 18010109 -- Gualala-Salmon 554 18010110 -- Russian 1485 180102 -- Klamath 18010201 -- Williamson 1439 18010202 -- Sprague 1610 18010203 -- Upper Klamath Lake 724 18010204 -- Lost 3024 18010205 -- Butte 607 18010206 -- Upper Klamath 1423 18010207 -- Shasta 794 18010208 -- Scott 814 18010209 -- Lower Klamath 1531 18010210 -- Salmon 751 18010211 -- Trinity 2038 18010212 -- South Fork Trinity 932 1802 -- Sacramento 180200 -- Upper Sacramento 18020001 -- Goose Lake 1088 18020002 -- Upper Pit 2681 18020003 -- Lower Pit 2638 18020004 -- McCloud 681

Page 99 of 113 Region Subregion Basin Subbasin Square Miles 18020005 -- Sacramento Headwaters 592 180201 -- Lower Sacramento 18020104 -- Sacramento-Stone Corral 1884 18020111 -- Lower American 293 18020115 -- Upper Stony 777 18020116 -- Upper Cache 1165 18020121 -- North Fork Feather 1211 18020122 -- East Branch North Fork Feather 1028 18020123 -- Middle Fork Feather 1365 18020125 -- Upper Yuba 1345 18020126 -- Upper Bear 474 18020128 -- North Fork American 1013 18020129 -- South Fork American 850 18020151 -- Cow Creek 427 18020152 -- Cottonwood Creek 944 18020153 -- Battle Creek 369 18020154 -- Clear Creek-Sacramento River 686 18020155 -- Paynes Creek-Sacramento River 424 18020156 -- Thomes Creek-Sacramento River 1009 18020157 -- Big Chico Creek-Sacramento River 952 18020158 -- Butte Creek 820 18020159 -- Honcut Headwaters-Lower Feather 774 18020161 -- Upper Coon-Upper Auburn 434 18020162 -- Upper Putah

Page 100 of 113 Region Subregion Basin Subbasin Square Miles 654 18020163 -- Lower Sacramento 1229 1803 -- Tulare-Buena Vista Lakes 180300 -- Tulare-Buena Vista Lakes 18030001 -- Upper Kern 1092 18030002 -- South Fork Kern 981 18030003 -- Middle Kern-Upper Tehachapi-Grapevine 2617 18030004 -- Upper Poso 575 18030005 -- Upper Deer-Upper White 1223 18030006 -- Upper Tule 945 18030007 -- Upper Kaweah 1523 18030009 -- Upper Dry 2126 18030010 -- Upper King 1544 18030012 -- Tulare Lake Bed 3787 1804 -- San Joaquin 180400 -- San Joaquin 18040001 -- Middle San Joaquin-Lower Chowchilla 3525 18040002 -- Lower San Joaquin River 918 18040003 -- San Joaquin Delta 1232 18040006 -- Upper San Joaquin 1639 18040007 -- Fresno River 648 18040008 -- Upper Merced 1269 18040009 -- Upper Tuolumne 1873 18040010 -- Upper Stanislaus 1197 18040011 -- Upper Calaveras California 529 18040012 -- Upper Mokelumne

Page 101 of 113 Region Subregion Basin Subbasin Square Miles 1266 18040013 -- Upper Cosumnes 950 18040014 -- Panoche-San Luis Reservoir 306 18040051 -- Rock Creek-French Camp Slough 473 1805 -- San Francisco Bay 180500 -- San Francisco Bay 18050001 -- Suisun Bay 652 18050002 -- San Pablo Bay 1227 18050003 -- Coyote 720 18050004 -- San Francisco Bay 1333 18050005 -- Tomales-Drake Bays 764 18050006 -- San Francisco Coastal South 674 1806 -- Central California Coastal 180600 -- Central California Coastal 18060002 -- Pajaro 1301 18060003 -- Carrizo Plain 445 18060004 -- Estrella 950 18060005 -- Salinas 3329 18060006 -- Central Coastal 1924 18060007 -- Cuyama 1144 18060008 -- Santa Maria 684 18060009 -- San Antonio 297 18060010 -- Santa Ynez 897 18060013 -- Santa Barbara Coastal 671 18060014 -- Santa Barbara Channel Islands 840 18060015 -- Monterey Bay

Page 102 of 113 Region Subregion Basin Subbasin Square Miles 757 1807 -- Southern California Coastal 180701 -- Ventura-San Gabriel Coastal 18070101 -- Ventura 335 18070102 -- Santa Clara 1626 18070103 -- Calleguas 438 18070104 -- Santa Monica Bay 673 18070105 -- Los Angeles 831 18070106 -- San Gabriel 906 18070107 -- San Pedro Channel Islands 797 180702 -- Santa Ana 18070201 -- Seal Beach 127 18070202 -- San Jacinto 765 18070203 -- Santa Ana 1694 18070204 -- Newport Bay 194 180703 -- Laguna-San Diego Coastal 18070301 -- Aliso-San Onofre 616 18070302 -- Santa Margarita 741 18070303 -- San Luis Rey-Escondido 831 18070304 -- San Diego 1553 18070305 -- Cottonwood-Tijuana 1719 1808 -- North Lahontan 180800 -- North Lahontan 18080001 -- Surprise Valley 906 18080002 -- Madeline Plains 842 18080003 -- Honey-Eagle Lakes 2803 1809 -- Northern Mojave-Mono Lake

Page 103 of 113 Region Subregion Basin Subbasin Square Miles 180901 -- Mono-Owens Lakes 18090101 -- Mono Lake 1086 18090102 -- Crowley Lake 1918 18090103 -- Owens Lake 1371 180902 -- Northern Mojave 18090201 -- Eureka-Saline Valleys 1640 18090202 -- Upper Amargosa 3408 18090203 -- Death Valley-Lower Amargosa 5377 18090204 -- Panamint Valley 1631 18090205 -- Indian Wells-Searles Valleys 2019 18090206 -- Antelope-Fremont Valleys 3368 18090207 -- Coyote-Cuddeback Lakes 1848 18090208 -- Mojave 4618 1810 -- Southern Mojave-Salton Sea 181001 -- Southern Mojave 18100100 -- Southern Mojave 8867 181002 -- Salton Sea 18100201 -- Whitewater River 1500 18100202 -- Carrizo Creek 653 18100203 -- San Felipe Creek 1056 18100204 -- Salton Sea 5009 19 -- Alaska Region 1901 -- Southeast Alaska 190101 -- Southern Southeast Alaska 19010102 -- Ketchikan 2066 19010103 -- Prince of Wales 6226 19010104 -- Bradfield Canal 1274

Page 104 of 113 Region Subregion Basin Subbasin Square Miles 19010105 -- Burroughs Bay 3219 19010106 -- Headwaters Portland Canal 672 19010107 -- Outlet Portland Canal 232 190102 -- Central Southeast Alaska 19010202 -- Kuiu-Kupreanof-Mitkof-Etolin-Zarembo-Wrangell 4084 19010203 -- Baranof-Chichagof Islands 5898 19010204 -- Admiralty Island 2141 19010205 -- Lower Iskut 54 19010206 -- Holkham Bay 2535 19010207 -- Stikine River 1002 19010208 -- Thomas Bay 978 190103 -- Northern Southeast Alaska 19010301 -- Lynn Canal 2336 19010302 -- Glacier Bay 3399 19010303 -- Chilkat-Skagway Rivers 2006 19010304 -- Taku River 1015 190104 -- Gulf of Alaska 19010402 -- Bering Glacier 5158 19010403 -- Tatshenshini River 22 19010404 -- Alsek River 815 19010405 -- Yakutat Bay-Gulf of Alaska 4744 19010406 -- Palma Bay 1573 190105 -- Icy Strait-Chatham Strait 19010500 -- Icy Strait-Chatham Strait 5053 1902 -- Southcentral Alaska 190201 -- Copper River Page 105 of 113 Region Subregion Basin Subbasin Square Miles 19020101 -- Upper Copper River 4499 19020102 -- Middle Copper River 8154 19020103 -- Chitina River 8097 19020104 -- Lower Copper River 5453 190202 -- Prince William Sound 19020201 -- Eastern Prince William Sound 5478 19020202 -- Western Prince William Sound 3174 19020203 -- Prince William Sound 3677 190203 -- Kenai Peninsula 19020301 -- Lower Kenai Peninsula 2705 19020302 -- Upper Kenai Peninsula 4219 190204 -- Knik Arm 19020401 -- Anchorage 832 19020402 -- Matanuska 3501 190205 -- Susitna River 19020501 -- Upper Susitna River 6284 19020502 -- Chulitna River 2591 19020503 -- Talkeetna River 2036 19020504 -- Yentna River 6137 19020505 -- Lower Susitna River 3698 190206 -- Western Cook Inlet 19020601 -- Redoubt-Trading Bays 4154 19020602 -- Tuxdeni-Kamishak Bays 3084 190207 -- Kodiak-Shelikof 19020701 -- Kodiak-Afognak Islands 8936 19020702 -- Shelikof Straight 8020

Page 106 of 113 Region Subregion Basin Subbasin Square Miles 190208 -- Cook Inlet 19020800 -- Cook Inlet 7809 1903 -- Southwest Alaska 190301 -- Aleutian Islands 19030101 -- Cold Bay 10282 19030102 -- Fox Islands 7536 19030103 -- Western Aleutian Islands 9735 19030104 -- Pribilof Islands 470 190302 -- Kvichak-Port Heiden 19030201 -- Port Heiden 3177 19030202 -- Ugashik Bay 4307 19030203 -- Egegik Bay 2774 19030204 -- Naknek 3748 19030205 -- Lake Clark 3582 19030206 -- Lake Iliamna 7152 190303 -- Nushagak River 19030301 -- Upper Nushagak River 5013 19030302 -- Mulchatna River 4293 19030303 -- Lower Nushagak River 3015 19030304 -- Wood River 1367 19030305 -- Togiak 4774 19030306 -- Nushagak Bay 2098 190304 -- Upper Kuskokwim River 19030401 -- North Fork Kuskokwim River 5099 19030403 -- Takotna River 2226 19030404 -- Holitna River 6398

Page 107 of 113 Region Subregion Basin Subbasin Square Miles 19030405 -- Stony River 9437 19030406 -- Middle Fork Kuskokwim River 3040 19030407 -- South Fork Kuskokwim River 3041 190305 -- Lower Kuskokwim River 19030501 -- Aniak 6259 19030502 -- Kuskokwim Delta 24986 19030503 -- Nunavak-St.Matthew Islands 3058 1904 -- Yukon Alaska 190401 -- Canada 19040101 -- White River 4971 19040102 -- Ladue River 3162 19040103 -- Sixtymile River 4981 19040104 -- Fortymile River 6493 190402 -- Porcupine River 19040201 -- Old Crow River 5370 19040202 -- Coleen River 4248 19040203 -- Sheenjek River 4737 19040204 -- Black River 6372 19040205 -- Porcupine Flats 5658 19040206 -- Grass River 2905 190403 -- Chandalar-Christian Rivers 19040301 -- Middle Fork-North Fork Chandalar Rivers 3457 19040302 -- East Fork Chandalar River 5566 19040303 -- Christian River 2486 19040304 -- Lower Chandalar River 2163 190404 -- Upper Yukon River

Page 108 of 113 Region Subregion Basin Subbasin Square Miles 19040401 -- Eagle to Circle 8914 19040402 -- Birch-Beaver Creeks 7976 19040403 -- Yukon Flats 7688 19040404 -- Ramparts 3114 190405 -- Tanana River 19040501 -- Nebesna-Chisana Rivers 5411 19040502 -- Tok 3070 19040503 -- Healy Lake 4988 19040504 -- Delta River 1704 19040505 -- Salcha River 2217 19040506 -- Chena River 2067 19040507 -- Tanana Flats 6119 19040508 -- Nenana River 3907 19040509 -- Tolovana River 3446 19040510 -- Kantishna River 7093 19040511 -- Lower Tanana River 4607 190406 -- Koyukuk River 19040601 -- Upper Koyukuk River 6929 19040602 -- South Fork Koyukuk River 2308 19040603 -- Alatna River 3501 19040604 -- Kanuti River 3354 19040605 -- Allakaket 1723 19040606 -- Huslia River 2366 19040607 -- Dulbi River 1462

Page 109 of 113 Region Subregion Basin Subbasin Square Miles 19040608 -- Koyukuk Flats 6616 19040609 -- Kateel River 3141 190407 -- Central Yukon 19040701 -- Tozitna River 1628 19040702 -- Nowitna River 7164 19040703 -- Melozitna River 2718 19040704 -- Ramparts to Ruby 3487 19040705 -- Galena 5868 190408 -- Lower Yukon 19040801 -- Anvik River 3853 19040802 -- Upper Innoko River 4418 19040803 -- Lower Innoko River 9701 19040804 -- Anvik to Pilot Station 6491 19040805 -- Yukon Delta 14892 1905 -- Northwest Alaska 190501 -- Norton Sound 19050101 -- Saint Lawrence Island 3083 19050102 -- Unalakleet 5828 19050103 -- Norton Bay 6246 19050104 -- Nome 5696 19050105 -- Imuruk Basin 4949 190502 -- Northern Seward Peninsula 19050201 -- Shishmaref 4145 19050202 -- Goodhope-Spafarief Bay 3968 19050203 -- Buckland River 3528 190503 -- Kobuk-Selawik Rivers

Page 110 of 113 Region Subregion Basin Subbasin Square Miles 19050301 -- Selawik Lake 6625 19050302 -- Upper Kobuk River 4667 19050303 -- Middle Kobuk River 4813 19050304 -- Lower Kobuk River 3371 190504 -- Noatak River-Lisburne Peninsula 19050401 -- Upper Noatak River 4695 19050402 -- Middle Noatak River 3872 19050403 -- Lower Noatak River 4828 19050404 -- Wulik-Kivalina Rivers 2988 19050405 -- Lisburne Peninsula 3044 190505 -- Kotzebue Sound 19050500 -- Kotzebue Sound 3093 1906 -- Arctic Alaska 190601 -- Western Arctic 19060101 -- Kukpowruk River 3993 19060102 -- Kokolik River 2298 19060103 -- Utukok River 4507 190602 -- Barrow Alaska 19060201 -- Kuk River 4175 19060202 -- Northwest Coast 1883 19060203 -- Meade River 5074 19060204 -- Ikpikpuk River 6891 19060205 -- Harrison Bay 2989 19060206 -- Admiralty Bay-Dease Inlet 3275 190603 -- Colville River 19060301 -- Upper Colville River 7921

Page 111 of 113 Region Subregion Basin Subbasin Square Miles 19060302 -- Killik River 5856 19060303 -- Chandler-Anaktuvuk Rivers 5522 19060304 -- Lower Colville River 4323 190604 -- Prudhoe Bay 19060401 -- Kuparuk River 4672 19060402 -- Sagavanirktok River 5512 19060403 -- Mikkelson Bay 3115 190605 -- Eastern Arctic 19060501 -- Canning River 2757 19060502 -- Camden Bay 3979 19060503 -- Beaufort Lagoon 13546 1907 -- Headwaters Yukon-Lake Laberge 190701 -- Headwaters Yukon River 19070101 -- Atlin Lake 2 19070102 -- Bennett Lake 7 19070103 -- Tagish Lake 1 19070104 -- Takhini River 1 20 -- Hawaii Region 2001 -- Hawaii 200100 -- Hawaii 20010000 -- Hawaii 4028 2002 -- Maui 200200 -- Maui 20020000 -- Maui 728 2003 -- Kahoolawe 200300 -- Kahoolawe 20030000 -- Kahoolawe 45 2004 -- Lanai 200400 -- Lanai 20040000 -- Lanai

Page 112 of 113 Region Subregion Basin Subbasin Square Miles 141 2005 -- Molokai 200500 -- Molokai 20050000 -- Molokai 261 2006 -- Oahu 200600 -- Oahu 20060000 -- Oahu 598 2007 -- Kauai 200700 -- Kauai 20070000 -- Kauai 555 2008 -- Niihau 200800 -- Niihau 20080000 -- Niihau 72 21 -- Caribbean Region 2101 -- Puerto Rico 210100 -- Puerto Rico 21010002 -- Cibuco-Guajataca 980 21010003 -- Culebrinas-Guanajibo 505 21010004 -- Southern Puerto Rico 834 21010005 -- Eastern Puerto Rico 1043 21010006 -- Puerto Rican Islands (Mona, Vieques, and Culebra) 85 2102 -- Virgin Islands 210200 -- Virgin Islands 21020001 -- St. John-St. Thomas 51 21020002 -- St. Croix 84

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