DALLAM SHERMAN HANSFORD OCHILTREE LIPSCOMB HARTLEY 1 MOORE HUTCHINSON ROBERTS HEMPHILL OLDHAM POTTER CARSON GRAY WHEELER Major River Basins DEAF SMITH RANDALL ARMSTRONG DONLEY COLLINGSWORTH of PARMER CASTRO SWISHER BRISCOE HALL CHILDRESS Texas 2 HARDEMAN BAILEY LAMB HALE FLOYD MOTLEY COTTLE WILBARGER FOARD WICHITA CLAY MONTAGUE LAMAR RED COCHRAN HOCKLEY CROSBY DICKENS KING BAYLOR ARCHER GRAYSON LUBBOCK KNOX COOKE FANNIN RIVER BOWIE DELTA 3 FRANKLIN TITUS TERRY GARZA THROCKMORTON JACK WISE DENTON YOAKUM LYNN KENT STONEWALL COLLIN HASKELL YOUNG HOPKINS HUNT MORRIS CASS CAMP ROCKWALL RAINS FISHER PALO PARKER DALLAS WO OD MARION GAINES DAWSO N BORDEN SCURRY JONES SHACKELFORD TARRANT UPSHUR 4 STEPHENS PINTO KAUFMAN VAN ZANDT HARRISON GREGG HOOD JOHNSON SMITH ELLIS ANDREWS MARTIN HOWARD NOLAN TAYLOR EASTLAND MITCHELL CALLAHAN 12 ERATH SOMERVELL HENDERSO N 8 5 PANOLA RUSK NAVARRO HILL COMANCHE ECTOR COKE BOSQUE LOVING WINKLER MIDLAND GLASSCOCK STERLING RUNNELS CHEROKEE ANDERSON SHELBY EL PASO COLEMAN BROWN HAMILTON FREESTONE CULBERSON NACOGDOCHES MCLENNAN LIMESTONE WARD SAN CRANE MILLS AUGUSTINE HUDSPETH TOM GREEN CORYELL UPTON REAGAN SABINE CONCHO 6 IRION LEON HOUSTON ANGELINA REEVES FALLS MCCULLOCH LAMPASAS 14 SAN SABA TRINITY BELL ROBERTSO N JASPER MADISON SCHLEICHER MENARD NEWTON JEFF PECO S BURNET MILAM POLK TYLER DAVIS CROCKETT WALKER MASON LLANO 23 WILLIAMSON BRAZOS SAN GRIMES JACINTO SUTTON KIMBLE BURLESON TRAVIS HARDIN GILLESPIE BLANCO LEE MONTGOMERY WASHINGTON TERRELL LIBERTY KERR BASTROP ORANGE PRESIDIO HAYS 10 EDWARDS WALLER VAL KENDALL AUSTIN JEFFERSON BREWSTER VERDE FAYETTE HARRIS CALDWELL REAL COMAL 9 CHAMBERS BANDERA COLORADO GUADALUPE FORT 7 19 BEND GONZALES BEXAR LAVACA KINNEY UVALDE MEDINA GALVESTON WHARTON 11 18 BRAZORIA WILSON 16 DEWITT 13 JACKSON ATASCOSA ZAVALA FRIO KARNES MATAGO RDA VICTORIA MAVERICK 15 21 GOLIAD 17 CALHOUN DIMMIT BEE MCMULLEN LIVE OAK LASALLE REFUGIO 20 ARANSAS 1. Canadian 9. Trinity-San Jacinto 17. Lavaca-Guadalupe SAN PATRICIO 2. Red 10. San Jacinto 18. Guadalupe WEBB JIM NUECES WELLS 3. Sulphur 11. San Jacinto-Brazos 19. San Antonio DUVAL 4. Cypress 12. Brazos 20. San Antonio-Nueces KLEBERG 5. Sabine 13. Brazos-Colorado 21. Nueces 22 TEXAS WATER DEVELOPMENT BOARD 6. Neches 14. Colorado 22. Nueces-Rio Grande BROOKS JIM HOGG ZAPATA 1700 North Congress Avenue | P.O. Box 13231 7. Neches-Trinity 15. Colorado-Lavaca 23. Rio Grande KENEDY Austin, Texas 78711-3231 www.twdb.texas.gov 8. Trinity 16. Lavaca County Boundaries 512-463-7847 STARR WILLACY DISCLAIMER: This map was generated by the Texas Water Development Board using There are eight designated coastal basins in Texas: the Neches- HIDALGO GIS (Geographical Information System) software. No claims are made to the accuracy Trinity, Trinity-San Jacinto, San Jacinto-Brazos, Brazos-Colorado, or completeness of the information shown herein nor to its suitability for a particular Colorado-Lavaca, Lavaca-Guadalupe, San Antonio-Nueces, and The unique features of each of these basins are a function of many CAMERON use. The scale and location of all mapped data are approximate. Map date: JAN-2014 Nueces-Rio Grande. Each coastal basin is named according to the factors, but one of the most critical is precipitation, which varies major river basins that bound them. For example, the Nueces-Rio from less than 10 inches per year in the western part of the state to Grande Coastal Basin is bounded on the north by the Nueces River more than 55 inches per year in the east. Other factors include 0 25 50 100 MISSION: The Texas Water Development Board's (TWDB) mission is to provide Basin and on the south by the Rio Grande Basin. Each coastal evaporation, vegetation, soil type, surface slope, geology, land leadership, planning, financial assistance, information, and education basin is also bounded by a bay or other outlet to the Gulf of Mexico. use practices, and runoff. ° Miles for the conservation and responsible development of water for Texas..