4-Digit HUC (0)
8-Digit HUC (1)
10-Digit HUC (2)
12-Digit HUC (3)
OWRB Stream Systems (4)
| 1-1, Red River Mainstem (To Kiamichi River) |
| 1-2, Little River (McCurtain County) |
| 1-3, Kiamichi River |
| 1-4-1, Muddy Boggy River |
| 1-4-2, Clear Boggy Creek |
| 1-5, Red River Mainstem (To Blue River) |
| 1-6, Blue River |
| 1-7, Red River Mainstem (To Washita) |
| 1-8-1, Lower Washita |
| 1-8-2, Middle Washita |
| 1-8-3, Upper Washita |
| 1-8-4, Washita Headwaters |
| 1-9, Lower Washita - Mainstem Red River (To Lake Texoma) |
| 1-10, Walnut Bayou |
| 1-11, Mud Creek |
| 1-12, Beaver Creek |
| 1-13-1, Cache Creek |
| 1-13-2, Deep Red Creek And West Cache Creek |
| 1-14, Red River Mainstem (To North Fork of Red) |
| 1-15-1, Lower North Fork Red River |
| 1-15-2, Upper North Fork Red River |
| 1-16, Salt Fork Red River |
| 1-17, Prairie Dog Town Fork Red River |
| 1-18, Elm Fork Red River |
| 2-1, Poteau River |
| 2-2, Lower Arkansas River |
| 2-3, Lower Canadian River (To Lake Eufaula) |
| 2-4, Middle Arkansas River |
| 2-5-1, Lower North Canadian River |
| 2-5-2, Middle North Canadian River |
| 2-5-3, Upper North Canadian River |
| 2-5-4, North Canadian Headwaters |
| 2-6-1, Lower Canadian River |
| 2-6-2, Middle Canadian River |
| 2-6-3, Upper Canadian River |
| 2-7, Deep Fork River |
| 2-8, Little River |
| 2-9-1, Lower Cimarron River |
| 2-9-2, Middle Cimarron River |
| 2-9-3, Upper Cimarron River |
| 2-9-4, Cimarron Headwaters |
| 2-10-1, Lower Salt Fork Arkansas River |
| 2-10-2, Upper Salt Fork Arkansas River |
| 2-11, Arkansas - Cimarron Rivers (To Keystone Lake) |
| 2-12, Arkansas River Mainstem (To Kansas State Line) |
| 2-13, Bird Creek |
| 2-14, Caney River |
| 2-15-1, Verdigris River (To Oologah Dam) |
| 2-15-2, Verdigris River (To Kansas State Line) |
| 2-16, Grand (Neosho) River |
| 2-17, Illinois River |
OCWP Water Plan Basins (5)
| 1, Red River Mainstem (To Kiamichi River) |
| 2, Little River (McCurtain County) - 1 |
| 3, Little River (McCurtain County) - 2 |
| 4, Little River (McCurtain County) - 3 |
| 5, Kiamichi River - 1 |
| 6, Kiamichi River - 2 |
| 7, Muddy Boggy River - 1 |
| 8, Muddy Boggy River - 2 |
| 9, Clear Boggy Creek |
| 10, Red River Mainstem (To Blue River) |
| 11, Blue River - 1 |
| 12, Blue River - 2 |
| 13, Red River Mainstem (To Washita) |
| 14, Lower Washita |
| 15, Middle Washita - 1 |
| 16, Middle Washita - 2 |
| 17, Upper Washita - 1 |
| 18, Upper Washita - 2 |
| 19, Upper Washita - 3 |
| 20, Washita Headwaters |
| 21, Red River Mainstem (To Walnut Bayou) |
| 22, Walnut Bayou |
| 23, Mud Creek |
| 24, Beaver Creek - 1 |
| 25, Beaver Creek - 2 |
| 26, Beaver Creek - 3 |
| 27, Cache Creek - 1 |
| 28, Cache Creek - 2 |
| 29, Deep Red Creek And West Cache Creek - 1 |
| 30, Deep Red Creek And West Cache Creek - 2 |
| 31, Red River Mainstem (To North Fork of Red) |
| 32, Lower North Fork Red River - 1 |
| 33, Lower North Fork Red River - 2 |
| 34, Lower North Fork Red River - 3 |
| 35, Lower North Fork Red River - 4 |
| 36, Upper North Fork Red River - 1 |
| 37, Upper North Fork Red River - 2 |
| 38, Salt Fork Red River - 1 |
| 39, Salt Fork Red River - 2 |
| 40, Prairie Dog Town Fork Red River - 1 |
| 41, Prairie Dog Town Fork Red River - 2 |
| 42, Elm Fork Red River - 1 |
| 43, Elm Fork Red River - 2 |
| 44, Poteau River - 1 |
| 45, Poteau River - 2 |
| 46, Lower Arkansas River - 1 |
| 47, Lower Arkansas River - 2 |
| 48, Canadian River (To North Canadian River) |
| 49, Middle Arkansas River |
| 50, Lower North Canadian River |
| 51, Middle North Canadian River |
| 52, Upper North Canadian River - 1 |
| 53, Upper North Canadian River - 2 |
| 54, Upper North Canadian River - 3 |
| 55, North Canadian Headwaters |
| 56, Lower Canadian River - 1 |
| 57, Lower Canadian River - 2 |
| 58, Middle Canadian River |
| 59, Upper Canadian River |
| 60, Deep Fork River |
| 61, Little River - 1 |
| 62, Little River - 2 |
| 63, Lower Cimarron River |
| 64, Middle Cimarron River |
| 65, Upper Cimarron River |
| 66, Cimarron Headwaters |
| 67, Lower Salt Fork Arkansas River - 1 |
| 68, Upper Salt Fork Arkansas River |
| 69, Lower Salt Fork Arkansas River - 2 |
| 70, Lower Salt Fork Arkansas River - 3 |
| 71, Arkansas River - Cimarron Rivers to Keystone Lake |
| 72, Arkansas River Mainstem (To Kansas State Line) |
| 73, Bird Creek - 1 |
| 74, Bird Creek - 2 |
| 75, Caney River - 1 |
| 76, Caney River - 2 |
| 77, Verdigris River (To Oologah Dam) - 1 |
| 78, Verdigris River (To Oologah Dam) - 2 |
| 79, Verdigris River (To Kansas State Line) |
| 80, Grand (Neosho) River - 1 |
| 81, Grand (Neosho) River - 2 |
| 82, Illinois River |
OCWP Watershed Planning Regions (6)
| Beaver-Cache |
| Blue-Boggy |
| Central |
| Eufaula |
| Grand |
| Lower Arkansas |
| Lower Washita |
| Middle Arkansas |
| Panhandle |
| Southeast |
| Southwest |
| Upper Arkansas |
| West Central |
OWRB Stream Systems HUC12 (7)
| 1-1, Red River Mainstem (To Kiamichi River) |
| 1-2, Little River (McCurtain County) |
| 1-3, Kiamichi River |
| 1-4-1, Muddy Boggy River |
| 1-4-2, Clear Boggy Creek |
| 1-5, Red River Mainstem (To Blue River) |
| 1-6, Blue River |
| 1-7, Red River Mainstem (To Washita) |
| 1-8-1, Lower Washita |
| 1-8-2, Middle Washita |
| 1-8-3, Upper Washita |
| 1-8-4, Washita Headwaters |
| 1-9, Lower Washita - Mainstem Red River (To Lake Texoma) |
| 1-10, Walnut Bayou |
| 1-11, Mud Creek |
| 1-12, Beaver Creek |
| 1-13-1, Cache Creek |
| 1-13-2, Deep Red Creek And West Cache Creek |
| 1-14, Red River Mainstem (To North Fork of Red) |
| 1-15-1, Lower North Fork Red River |
| 1-15-2, Upper North Fork Red River |
| 1-16, Salt Fork Red River |
| 1-17, Prairie Dog Town Fork Red River |
| 1-18, Elm Fork Red River |
| 2-1, Poteau River |
| 2-2, Lower Arkansas River |
| 2-3, Lower Canadian River (To Lake Eufaula) |
| 2-4, Middle Arkansas River |
| 2-5-1, Lower North Canadian River |
| 2-5-2, Middle North Canadian River |
| 2-5-3, Upper North Canadian River |
| 2-5-4, North Canadian Headwaters |
| 2-6-1, Lower Canadian River |
| 2-6-2, Middle Canadian River |
| 2-6-3, Upper Canadian River |
| 2-7, Deep Fork River |
| 2-8, Little River |
| 2-9-1, Lower Cimarron River |
| 2-9-2, Middle Cimarron River |
| 2-9-3, Upper Cimarron River |
| 2-9-4, Cimarron Headwaters |
| 2-10-1, Lower Salt Fork Arkansas River |
| 2-10-2, Upper Salt Fork Arkansas River |
| 2-11, Arkansas - Cimarron Rivers (To Keystone Lake) |
| 2-12, Arkansas River Mainstem (To Kansas State Line) |
| 2-13, Bird Creek |
| 2-14, Caney River |
| 2-15-1, Verdigris River (To Oologah Dam) |
| 2-15-2, Verdigris River (To Kansas State Line) |
| 2-16, Grand (Neosho) River |
| 2-17, Illinois River |
OWRB Arkansas & Red River Basins (8)
| Arkansas River Basin |
| Red River Basin |
|