REGION 16  GREAT BASIN REGION -- THE DRAINAGE OF THE GREAT BASIN THAT           
           DISCHARGES INTO THE STATES OF UTAH AND NEVADA. INCLUDES PARTS        
           OF CALIFORNIA, IDAHO, NEVADA, OREGON, UTAH, AND WYOMING.             
                                                                                
                                                                                
  SUBREGION  1601 -- BEAR: THE BEAR RIVER BASIN. IDAHO, UTAH, WYOMING.          
                       AREA =     7310 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 160101 -- UPPER BEAR: THE BEAR RIVER BASIN ABOVE            
                              STEWART DAM. IDAHO, UTAH, WYOMING.                
                                AREA =     2800 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16010101 -- UPPER BEAR. UTAH, WYOMING.                  
                                      AREA =     1970 SQ.MI.                    
                        16010102 -- CENTRAL BEAR. IDAHO, UTAH, WYOMING.         
                                      AREA =      834 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 160102 -- LOWER BEAR: THE BEAR RIVER BASIN BELOW            
                              STEWART DAM. IDAHO, UTAH.                         
                                AREA =     4510 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16010201 -- BEAR LAKE. IDAHO, UTAH.                     
                                      AREA =     1220 SQ.MI.                    
                        16010202 -- MIDDLE BEAR. IDAHO, UTAH.                   
                                      AREA =     1210 SQ.MI.                    
                        16010203 -- LITTLE BEAR-LOGAN. IDAHO, UTAH.             
                                      AREA =      928 SQ.MI.                    
                        16010204 -- LOWER BEAR-MALAD. IDAHO, UTAH.              
                                      AREA =     1150 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1602 -- GREAT SALT LAKE: THE GREAT SALT LAKE BASIN                 
                     EXCLUDING THE BEAR RIVER BASIN. IDAHO, NEVADA,             
                     UTAH, WYOMING.                                             
                       AREA =    28700 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 160201 -- WEBER: THE WEBER RIVER BASIN. UTAH,               
                              WYOMING.                                          
                                AREA =     2430 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16020101 -- UPPER WEBER. UTAH, WYOMING.                 
                                      AREA =     1170 SQ.MI.                    
                        16020102 -- LOWER WEBER. UTAH.                          
                                      AREA =     1260 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 160202 -- JORDAN: THE JORDAN RIVER BASIN. UTAH.             
                                AREA =     3830 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16020201 -- UTAH LAKE. UTAH.                            
                                      AREA =     1340 SQ.MI.                    
                        16020202 -- SPANISH FORK. UTAH.                         
                                      AREA =      993 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        16020203 -- PROVO. UTAH.                                
                                      AREA =      710 SQ.MI.                    
                        16020204 -- JORDAN. UTAH.                               
                                      AREA =      791 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 160203 -- GREAT SALT LAKE: THE GREAT SALT LAKE              
                              BASIN, EXCLUDING THE BEAR, WEBER,  AND            
                              JORDAN RIVER BASINS. IDAHO, NEVADA,               
                              UTAH.                                             
                                AREA =    22400 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16020301 -- HAMLIN-SNAKE VALLEYS. NEVADA, UTAH.         
                                      AREA =     3100 SQ.MI.                    
                        16020302 -- PINE VALLEY. UTAH.                          
                                      AREA =      732 SQ.MI.                    
                        16020303 -- TULE VALLEY. UTAH.                          
                                      AREA =      928 SQ.MI.                    
                        16020304 -- RUSH-TOOELE VALLEYS. UTAH.                  
                                      AREA =     1180 SQ.MI.                    
                        16020305 -- SKULL VALLEY. UTAH.                         
                                      AREA =      798 SQ.MI.                    
                        16020306 -- SOUTHERN GREAT SALT LAKE DESERT.            
                                    NEVADA, UTAH.                               
                                      AREA =     5420 SQ.MI.                    
                        16020307 -- PILOT-THOUSAND SPRINGS, NEVADA,             
                                    UTAH.                                       
                                      AREA =     1780 SQ.MI.                    
                        16020308 -- NORTHERN GREAT SALT LAKE DESERT.            
                                    NEVADA, UTAH.                               
                                      AREA =     4650 SQ.MI.                    
                        16020309 -- CURLEW VALLEY. IDAHO, UTAH.                 
                                      AREA =     1930 SQ.MI.                    
                        16020310 -- GREAT SALT LAKE. UTAH.                      
                                      AREA =     1880 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1603 -- ESCALANTE DESERT-SEVIER LAKE: THE ESCALANTE DESERT         
                     AND THE SEVIER LAKE CLOSED BASINS. NEVADA, UTAH.           
                       AREA =    16200 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 160300 -- ESCALANTE DESERT-SEVIER LAKE: NEVADA,             
                              UTAH.                                             
                                AREA =    16200 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16030001 -- UPPER SEVIER. UTAH.                         
                                      AREA =     1180 SQ.MI.                    
                        16030002 -- EAST FORK SEVIER. UTAH.                     
                                      AREA =     1250 SQ.MI.                    
                        16030003 -- MIDDLE SEVIER. UTAH.                        
                                      AREA =     1850 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        16030004 -- SAN PITCH. UTAH.                            
                                      AREA =      858 SQ.MI.                    
                        16030005 -- LOWER SEVIER. UTAH.                         
                                      AREA =     3970 SQ.MI.                    
                        16030006 -- ESCALANTE DESERT. NEVADA,                   
                                    UTAH.                                       
                                      AREA =     3270 SQ.MI.                    
                        16030007 -- BEAVER BOTTOMS-UPPER BEAVER. UTAH.          
                                      AREA =     1720 SQ.MI.                    
                        16030008 -- LOWER BEAVER. UTAH.                         
                                      AREA =      746 SQ.MI.                    
                        16030009 -- SEVIER LAKE. UTAH.                          
                                      AREA =     1330 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1604 -- BLACK ROCK DESERT-HUMBOLDT: THE HUMBOLDT RIVER             
                     BASIN, THE BLACK ROCK DESERT, AND OTHER CLOSED             
                     BASINS THAT DISCHARGE INTO                                 
                     NORTHWESTERN NEVADA. CALIFORNIA, NEVADA, OREGON.           
                       AREA =    28300 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 160401 -- HUMBOLDT: THE HUMBOLDT RIVER BASIN.               
                              NEVADA.                                           
                                AREA =    16700 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16040101 -- UPPER HUMBOLDT. NEVADA.                     
                                      AREA =     2720 SQ.MI.                    
                        16040102 -- NORTH FORK HUMBOLDT. NEVADA.                
                                      AREA =      988 SQ.MI.                    
                        16040103 -- SOUTH FORK HUMBOLDT. NEVADA.                
                                      AREA =     1270 SQ.MI.                    
                        16040104 -- PINE. NEVADA.                               
                                      AREA =      985 SQ.MI.                    
                        16040105 -- MIDDLE HUMBOLDT. NEVADA.                    
                                      AREA =     3180 SQ.MI.                    
                        16040106 -- ROCK. NEVADA.                               
                                      AREA =      888 SQ.MI.                    
                        16040107 -- REESE. NEVADA.                              
                                      AREA =     2310 SQ.MI.                    
                        16040108 -- LOWER HUMBOLDT. NEVADA.                     
                                      AREA =     2590 SQ.MI.                    
                        16040109 -- LITTLE HUMBOLDT. NEVADA.                    
                                      AREA =     1740 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 160402 -- BLACK ROCK DESERT: THE BLACK ROCK DESERT          
                              AND OTHER CLOSED BASINS THAT                      
                              DISCHARGE INTO NORTHWESTERN NEVADA.               
                              CALIFORNIA, NEVADA, OREGON.                       
                                AREA =    11600 SQ.MI.                          
                                                                                
                                                                                
                                                                                
      CATALOGING UNITS  16040201 -- UPPER QUINN. NEVADA, OREGON.                
                                      AREA =     3480 SQ.MI.                    
                        16040202 -- LOWER QUINN. NEVADA.                        
                                      AREA =     3230 SQ.MI.                    
                        16040203 -- SMOKE CREEK DESERT. CALIFORNIA,             
                                    NEVADA.                                     
                                      AREA =     2430 SQ.MI.                    
                        16040204 -- MASSACRE LAKE. CALIFORNIA, NEVADA,          
                                      AREA =     1300 SQ.MI.                    
                        16040205 -- THOUSAND-VIRGIN. NEVADA, OREGON.            
                                      AREA =     1150 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1605 -- CENTRAL LAHONTAN: THE CENTRAL LAHONTAN BASIN               
                     CONSISTING OF THE CARSON, TRUCKEE, AND WALKER RIVER        
                     BASINS. CALIFORNIA, NEVADA.                                
                       AREA =    12500 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 160501 -- TRUCKEE: THE TRUCKEE RIVER BASIN.                 
                              CALIFORNIA, NEVADA.                               
                                AREA =     4710 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16050101 -- LAKE TAHOE. CALIFORNIA, NEVADA.             
                                      AREA =      505 SQ.MI.                    
                        16050102 -- TRUCKEE. CALIFORNIA, NEVADA.                
                                      AREA =     1190 SQ.MI.                    
                        16050103 -- PYRAMID-WINNEMUCCA LAKES. NEVADA.           
                                      AREA =     1370 SQ.MI.                    
                        16050104 -- GRANITE SPRINGS VALLEY. NEVADA.             
                                      AREA =     1640 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 160502 -- CARSON: THE CARSON RIVER BASIN.                   
                              CALIFORNIA, NEVADA.                               
                                AREA =     3930 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16050201 -- UPPER CARSON. CALIFORNIA, NEVADA.           
                                      AREA =      934 SQ.MI.                    
                        16050202 -- MIDDLE CARSON. NEVADA.                      
                                      AREA =      843 SQ.MI.                    
                        16050203 -- CARSON DESERT. NEVADA.                      
                                      AREA =     2150 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 160503 -- WALKER: THE WALKER RIVER BASIN.                   
                              CALIFORNIA, NEVADA.                               
                                AREA =     3920 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16050301 -- EAST WALKER. CALIFORNIA, NEVADA.            
                                      AREA =     1080 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        16050302 -- WEST WALKER. CALIFORNIA, NEVADA.            
                                      AREA =      992 SQ.MI.                    
                        16050303 -- WALKER. NEVADA.                             
                                      AREA =     1010 SQ.MI.                    
                        16050304 -- WALKER LAKE. NEVADA.                        
                                      AREA =      835 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1606 -- CENTRAL NEVADA DESERT BASINS: THE CLOSED DESERT            
                     BASINS THAT DISCHARGE INTO SOUTH CENTRAL NEVADA.           
                     CALIFORNIA, NEVADA.                                        
                       AREA =    47100 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 160600 -- CENTRAL NEVADA DESERT BASINS: CALIFORNIA,         
                              NEVADA.                                           
                                AREA =    47100 SQ.MI.                          
                                                                                
      CATALOGING UNITS  16060001 -- DIXIE VALLEY. NEVADA.                       
                                      AREA =     3990 SQ.MI.                    
                        16060002 -- GABBS VALLEY. NEVADA.                       
                                      AREA =     2060 SQ.MI.                    
                        16060003 -- SOUTHERN BIG SMOKY VALLEY. NEVADA.          
                                      AREA =     2030 SQ.MI.                    
                        16060004 -- NORTHERN BIG SMOKY VALLEY. NEVADA.          
                                      AREA =     1890 SQ.MI.                    
                        16060005 -- DIAMOND-MONITOR VALLEYS. NEVADA.            
                                      AREA =     3070 SQ.MI.                    
                        16060006 -- LITTLE SMOKY-NEWARK VALLEYS. NEVADA.        
                                      AREA =     1430 SQ.MI.                    
                        16060007 -- LONG-RUBY VALLEYS. NEVADA.                  
                                      AREA =     4060 SQ.MI.                    
                        16060008 -- SPRING-STEPTOE VALLEYS. NEVADA.             
                                      AREA =     5240 SQ.MI.                    
                        16060009 -- DRY LAKE VALLEY. NEVADA.                    
                                      AREA =     2160 SQ.MI.                    
                        16060010 -- FISH LAKE-SODA SPRING VALLEYS.              
                                    CALIFORNIA, NEVADA.                         
                                      AREA =     2720 SQ.MI.                    
                        16060011 -- RALSTON-STONE CABIN VALLEYS. NEVADA.        
                                      AREA =     3190 SQ.MI.                    
                        16060012 -- HOT CREEK-RAILROAD VALLEYS. NEVADA.         
                                      AREA =     4660 SQ.MI.                    
                        16060013 -- CACTUS-SARCOBATUS FLATS. NEVADA.            
                                      AREA =     2720 SQ.MI.                    
                        16060014 -- SAND SPRING-TIKABOO VALLEYS. NEVADA.        
                                      AREA =     5070 SQ.MI.                    
                        16060015 -- IVANPAH-PAHRUMP VALLEYS. CALIFORNIA,        
                                    NEVADA.                                     
                                      AREA =     2830 SQ.MI.                    
                                                                                
                                                                                
REGION 17  PACIFIC NORTHWEST REGION -- THE DRAINAGE WITHIN THE UNITED           
           STATES THAT ULTIMATELY DISCHARGES INTO: (A) THE STRAITS OF           
           GEORGIA AND OF JUAN DE FUCA, AND (B) THE PACIFIC OCEAN WITHIN        
           THE STATES OF OREGON AND WASHINGTON; AND THAT PART OF THE            
           GREAT BASIN WHOSE DISCHARGE IS INTO THE STATE OF OREGON.             
           INCLUDES ALL OF WASHINGTON AND PARTS OF CALIFORNIA,                  
           IDAHO, MONTANA, NEVADA, OREGON, UTAH, AND WYOMING.                   
                                                                                
                                                                                
  SUBREGION  1701 -- KOOTENAI-PEND OREILLE-SPOKANE: THE KOOTENAI, PEND          
                     OREILLE, AND SPOKANE RIVER BASINS WITHIN THE UNITED        
                     STATES. IDAHO, MONTANA, AND WASHINGTON.                    
                       AREA =    36600 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 170101 -- KOOTENAI: THE KOOTENAI RIVER BASIN WITHIN         
                              THE UNITED STATES. IDAHO, MONTANA.                
                                AREA =     4850 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17010101 -- UPPER KOOTENAI. IDAHO, MONTANA.             
                                      AREA =     2290 SQ.MI.                    
                        17010102 -- FISHER. MONTANA.                            
                                      AREA =      843 SQ.MI.                    
                        17010103 -- YAAK. MONTANA.                              
                                      AREA =      630 SQ.MI.                    
                        17010104 -- LOWER KOOTENAI. IDAHO, MONTANA.             
                                      AREA =      887 SQ.MI.                    
                        17010105 -- MOYIE. IDAHO, MONTANA.                      
                                      AREA =      203 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 170102 -- PEND OREILLE: THE PEND OREILLE RIVER BASIN        
                              WITHIN THE UNITED STATES. IDAHO, MONTANA,         
                              AND WASHINGTON.                                   
                                AREA =    25100 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17010201 -- UPPER CLARK FORK. MONTANA.                  
                                      AREA =     2320 SQ.MI.                    
                        17010202 -- FLINT-ROCK. MONTANA.                        
                                      AREA =     1400 SQ.MI.                    
                        17010203 -- BLACKFOOT. MONTANA.                         
                                      AREA =     2340 SQ.MI.                    
                        17010204 -- MIDDLE CLARK FORK. MONTANA.                 
                                      AREA =     1970 SQ.MI.                    
                        17010205 -- BITTERROOT. MONTANA.                        
                                      AREA =     2860 SQ.MI.                    
                        17010206 -- NORTH FORK FLATHEAD. MONTANA.               
                                      AREA =      967 SQ.MI.                    
                        17010207 -- MIDDLE FORK FLATHEAD. MONTANA.              
                                      AREA =     1160 SQ.MI.                    
                        17010208 -- FLATHEAD LAKE. MONTANA.                     
                                      AREA =     1160 SQ.MI.                    
                        17010209 -- SOUTH FORK FLATHEAD. MONTANA.               
                                      AREA =     1690 SQ.MI.                    
                        17010210 -- STILLWATER. MONTANA.                        
                                      AREA =      830 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        17010211 -- SWAN. MONTANA.                              
                                      AREA =      748 SQ.MI.                    
                        17010212 -- LOWER FLATHEAD. MONTANA.                    
                                      AREA =     2010 SQ.MI.                    
                        17010213 -- LOWER CLARK FORK. IDAHO, MONTANA.           
                                      AREA =     2330 SQ.MI.                    
                        17010214 -- PEND OREILLE LAKE. IDAHO, WASHINGTON.       
                                      AREA =     1240 SQ.MI.                    
                        17010215 -- PRIEST. IDAHO, WASHINGTON.                  
                                      AREA =      983 SQ.MI.                    
                        17010216 -- PEND OREILLE. IDAHO, WASHINGTON.            
                                      AREA =     1080 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 170103 -- SPOKANE: THE SPOKANE RIVER BASIN. IDAHO,          
                              WASHINGTON.                                       
                                AREA =     6680 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17010301 -- UPPER COEUR D'ALENE. IDAHO                  
                                      AREA =      905 SQ.MI.                    
                        17010302 -- SOUTH FORK COEUR D'ALENE. IDAHO.            
                                      AREA =      297 SQ.MI.                    
                        17010303 -- COEUR D'ALENE LAKE. IDAHO,                  
                                    WASHINGTON.                                 
                                      AREA =      663 SQ.MI.                    
                        17010304 -- ST. JOE. IDAHO.                             
                                      AREA =     1860 SQ.MI.                    
                        17010305 -- UPPER SPOKANE. IDAHO, WASHINGTON.           
                                      AREA =      609 SQ.MI.                    
                        17010306 -- HANGMAN. IDAHO, WASHINGTON.                 
                                      AREA =      714 SQ.MI.                    
                        17010307 -- LOWER SPOKANE. WASHINGTON.                  
                                      AREA =      904 SQ.MI.                    
                        17010308 -- LITTLE SPOKANE. IDAHO, WASHINGTON.          
                                      AREA =      723 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1702 -- UPPER COLUMBIA: THE COLUMBIA RIVER BASIN WITHIN THE        
                     THE UNITED STATES ABOVE THE CONFLUENCE WITH THE            
                     SNAKE RIVER BASIN, EXCLUDING THE YAKIMA RIVER              
                     BASIN. WASHINGTON.                                         
                       AREA =    22600 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 170200 -- UPPER COLUMBIA. WASHINGTON.                       
                                AREA =    22600 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17020001 -- FRANKLIN D. ROOSEVELT LAKE.                 
                                    WASHINGTON.                                 
                                      AREA =     2170 SQ.MI.                    
                        17020002 -- KETTLE. WASHINGTON.                         
                                      AREA =      966 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        17020003 -- COLVILLE. WASHINGTON.                       
                                      AREA =     1030 SQ.MI.                    
                        17020004 -- SANPOIL. WASHINGTON.                        
                                      AREA =     1080 SQ.MI.                    
                        17020005 -- CHIEF JOSEPH. WASHINGTON.                   
                                      AREA =     1390 SQ.MI.                    
                        17020006 -- OKANOGAN. WASHINGTON.                       
                                      AREA =     1640 SQ.MI.                    
                        17020007 -- SIMILKAMEEN. WASHINGTON.                    
                                      AREA =      671 SQ.MI.                    
                        17020008 -- METHOW. WASHINGTON.                         
                                      AREA =     1820 SQ.MI.                    
                        17020009 -- LAKE CHELAN. WASHINGTON.                    
                                      AREA =      955 SQ.MI.                    
                        17020010 -- UPPER COLUMBIA-ENTIAT. WASHINGTON.          
                                      AREA =     1520 SQ.MI.                    
                        17020011 -- WENATCHEE. WASHINGTON.                      
                                      AREA =     1350 SQ.MI.                    
                        17020012 -- MOSES COULEE. WASHINGTON.                   
                                      AREA =      926 SQ.MI.                    
                        17020013 -- UPPER CRAB. WASHINGTON.                     
                                      AREA =     1860 SQ.MI.                    
                        17020014 -- BANKS LAKE. WASHINGTON.                     
                                      AREA =      609 SQ.MI.                    
                        17020015 -- LOWER CRAB. WASHINGTON.                     
                                      AREA =     2510 SQ.MI.                    
                        17020016 -- UPPER COLUMBIA-PRIEST RAPIDS.               
                                    WASHINGTON.                                 
                                      AREA =     2070 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1703 -- YAKIMA. THE YAKIMA RIVER BASIN. WASHINGTON.                
                       AREA =     6210 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 170300 -- YAKIMA. WASHINGTON.                               
                                AREA =     6210 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17030001 -- UPPER YAKIMA. WASHINGTON.                   
                                      AREA =     2130 SQ.MI.                    
                        17030002 -- NACHES. WASHINGTON.                         
                                      AREA =     1130 SQ.MI.                    
                        17030003 -- LOWER YAKIMA, WASHINGTON.                   
                                      AREA =     2950 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1704 -- UPPER SNAKE: THE SNAKE RIVER BASIN TO AND                  
                     INCLUDING THE CLOVER CREEK BASIN.                          
                     IDAHO, NEVADA, UTAH, WYOMING.                              
                       AREA =    35600 SQ.MI.                                   
                                                                                
                                                                                
                                                                                
    ACCOUNTING UNIT 170401 -- SNAKE HEADWATERS: THE SNAKE RIVER BASIN           
                              ABOVE KELLY MOUNTAIN. IDAHO, WYOMING.             
                                AREA =     5690 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17040101 -- SNAKE HEADWATERS. WYOMING.                  
                                      AREA =     1680 SQ.MI.                    
                        17040102 -- GROS VENTRE. WYOMING.                       
                                      AREA =      638 SQ.MI.                    
                        17040103 -- GREYS-HOBOCK. WYOMING.                      
                                      AREA =     1570 SQ.MI.                    
                        17040104 -- PALISADES. IDAHO, WYOMING.                  
                                      AREA =      915 SQ.MI.                    
                        17040105 -- SALT. IDAHO, WYOMING.                       
                                      AREA =      887 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 170402 -- UPPER SNAKE: THE SNAKE RIVER BASIN FROM           
                              KELLY MOUNTAIN TO AND INCLUDING THE               
                              CLOVER CREEK BASIN. IDAHO, NEVADA,                
                              UTAH, WYOMING.                                    
                                AREA =    29900 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17040201 -- IDAHO FALLS. IDAHO.                         
                                      AREA =     1140 SQ.MI.                    
                        17040202 -- UPPER HENRYS. IDAHO, WYOMING.               
                                      AREA =     1090 SQ.MI.                    
                        17040203 -- LOWER HENRYS. IDAHO, WYOMING.               
                                      AREA =     1040 SQ.MI.                    
                        17040204 -- TETON. IDAHO, WYOMING.                      
                                      AREA =     1130 SQ.MI.                    
                        17040205 -- WILLOW. IDAHO.                              
                                      AREA =      645 SQ.MI.                    
                        17040206 -- AMERICAN FALLS. IDAHO.                      
                                      AREA =     2850 SQ.MI.                    
                        17040207 -- BLACKFOOT. IDAHO.                           
                                      AREA =     1080 SQ.MI.                    
                        17040208 -- PORTNEUF. IDAHO.                            
                                      AREA =     1320 SQ.MI.                    
                        17040209 -- LAKE WALCOTT. IDAHO.                        
                                      AREA =     3670 SQ.MI.                    
                        17040210 -- RAFT. IDAHO, UTAH.                          
                                      AREA =     1470 SQ.MI.                    
                        17040211 -- GOOSE. IDAHO, NEVADA, UTAH.                 
                                      AREA =     1150 SQ.MI.                    
                        17040212 -- UPPER SNAKE-ROCK. IDAHO.                    
                                      AREA =     2440 SQ.MI.                    
                        17040213 -- SALMON FALLS. IDAHO, NEVADA.                
                                      AREA =     2120 SQ.MI.                    
                        17040214 -- BEAVER-CAMAS. IDAHO.                        
                                      AREA =      982 SQ.MI.                    
                        17040215 -- MEDICINE LODGE. IDAHO.                      
                                      AREA =      952 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        17040216 -- BIRCH. IDAHO.                               
                                      AREA =      692 SQ.MI.                    
                        17040217 -- LITTLE LOST. IDAHO.                         
                                      AREA =      957 SQ.MI.                    
                        17040218 -- BIG LOST. IDAHO.                            
                                      AREA =     1900 SQ.MI.                    
                        17040219 -- BIG WOOD. IDAHO.                            
                                      AREA =     1460 SQ.MI.                    
                        17040220 -- CAMAS. IDAHO.                               
                                      AREA =      672 SQ.MI.                    
                        17040221 -- LITTLE WOOD. IDAHO.                         
                                      AREA =     1120 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1705 -- MIDDLE SNAKE: THE SNAKE RIVER BASIN BELOW THE CLOVER       
                     CREEK BASIN TO HELLS CANYON DAM. IDAHO,                    
                     NEVADA, OREGON.                                            
                       AREA =    36700 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 170501 -- MIDDLE SNAKE-BOISE: THE SNAKE RIVER BASIN         
                              BELOW THE CLOVER CREEK BASIN TO AND               
                              INCLUDING THE WEISER RIVER BASIN.                 
                              IDAHO, NEVADA, OREGON.                            
                                AREA =    32600 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17050101 -- C. J. STRIKE RESERVOIR. IDAHO.              
                                      AREA =     2150 SQ.MI.                    
                        17050102 -- BRUNEAU. IDAHO, NEVADA.                     
                                      AREA =     3290 SQ.MI.                    
                        17050103 -- MIDDLE SNAKE-SUCCOR. IDAHO, OREGON.         
                                      AREA =     2280 SQ.MI.                    
                        17050104 -- UPPER OWYHEE. IDAHO, NEVADA.                
                                      AREA =     2110 SQ.MI.                    
                        17050105 -- SOUTH FORK OWYHEE. IDAHO, NEVADA,           
                                    OREGON.                                     
                                      AREA =     1860 SQ.MI.                    
                        17050106 -- EAST LITTLE OWYHEE. IDAHO. NEVADA,          
                                    OREGON.                                     
                                      AREA =      910 SQ.MI.                    
                        17050107 -- MIDDLE OWYHEE. IDAHO, NEVADA,               
                                    OREGON.                                     
                                      AREA =     1460 SQ.MI.                    
                        17050108 -- JORDAN. IDAHO, OREGON.                      
                                      AREA =     1270 SQ.MI.                    
                        17050109 -- CROOKED-RATTLESNAKE. OREGON.                
                                      AREA =     1340 SQ.MI.                    
                        17050110 -- LOWER OWYHEE. OREGON.                       
                                      AREA =     2000 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        17050111 -- NORTH AND MIDDLE FORKS BOISE. IDAHO.        
                                      AREA =      761 SQ.MI.                    
                        17050112 -- BOISE-MORES. IDAHO.                         
                                      AREA =      620 SQ.MI.                    
                        17050113 -- SOUTH FORK BOISE. IDAHO.                    
                                      AREA =     1300 SQ.MI.                    
                        17050114 -- LOWER BOISE. IDAHO.                         
                                      AREA =     1330 SQ.MI.                    
                        17050115 -- MIDDLE SNAKE-PAYETTE. IDAHO,                
                                    OREGON.                                     
                                      AREA =      294 SQ.MI.                    
                        17050116 -- UPPER MALHEUR. OREGON.                      
                                      AREA =     2430 SQ.MI.                    
                        17050117 -- LOWER MALHEUR. OREGON.                      
                                      AREA =      927 SQ.MI.                    
                        17050118 -- BULLY. OREGON.                              
                                      AREA =      577 SQ.MI.                    
                        17050119 -- WILLOW. OREGON.                             
                                      AREA =      773 SQ.MI.                    
                        17050120 -- SOUTH FORK PAYETTE. IDAHO.                  
                                      AREA =      813 SQ.MI.                    
                        17050121 -- MIDDLE FORK PAYETTE. IDAHO.                 
                                      AREA =      338 SQ.MI.                    
                        17050122 -- PAYETTE. IDAHO.                             
                                      AREA =     1240 SQ.MI.                    
                        17050123 -- NORTH FORK PAYETTE. IDAHO.                  
                                      AREA =      912 SQ.MI.                    
                        17050124 -- WEISER. IDAHO.                              
                                      AREA =     1660 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 170502 -- MIDDLE SNAKE-POWDER: THE SNAKE RIVER BASIN        
                              BELOW THE WEISER RIVER BASIN                      
                              TO HELLS CANYON DAM. IDAHO, OREGON.               
                                AREA =     4100 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17050201 -- BROWNLEE RESERVOIR. IDAHO, OREGON.          
                                      AREA =     1290 SQ.MI.                    
                        17050202 -- BURNT. OREGON.                              
                                      AREA =     1090 SQ.MI.                    
                        17050203 -- POWDER. OREGON.                             
                                      AREA =     1720 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1706 -- LOWER SNAKE: THE SNAKE RIVER BASIN BELOW HELLS             
                     CANYON DAM TO ITS CONFLUENCE WITH THE COLUMBIA             
                     RIVER. IDAHO, OREGON, WASHINGTON.                          
                       AREA =    35200 SQ.MI.                                   
                                                                                
                                                                                
                                                                                
    ACCOUNTING UNIT 170601 -- LOWER SNAKE: THE SNAKE RIVER BASIN BELOW          
                              HELLS CANYON DAM TO ITS CONFLUENCE WITH           
                              THE COLUMBIA RIVER, EXCLUDING THE SALMON          
                              AND CLEARWATER RIVER BASINS. IDAHO,               
                              OREGON, WASHINGTON.                               
                                AREA =    11800 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17060101 -- HELLS CANYON. IDAHO, OREGON.                
                                      AREA =      545 SQ.MI.                    
                        17060102 -- IMNAHA. OREGON.                             
                                      AREA =      855 SQ.MI.                    
                        17060103 -- LOWER SNAKE-ASOTIN. IDAHO, OREGON,          
                                    WASHINGTON.                                 
                                      AREA =      711 SQ.MI.                    
                        17060104 -- UPPER GRANDE RONDE. OREGON.                 
                                      AREA =     1650 SQ.MI.                    
                        17060105 -- WALLOWA. OREGON.                            
                                      AREA =      950 SQ.MI.                    
                        17060106 -- LOWER GRANDE RONDE. OREGON,                 
                                    WASHINGTON.                                 
                                      AREA =     1530 SQ.MI.                    
                        17060107 -- LOWER SNAKE-TUCANNON. WASHINGTON.           
                                      AREA =     1480 SQ.MI.                    
                        17060108 -- PALOUSE. IDAHO, WASHINGTON.                 
                                      AREA =     2360 SQ.MI.                    
                        17060109 -- ROCK. IDAHO, WASHINGTON.                    
                                      AREA =      962 SQ.MI.                    
                        17060110 -- LOWER SNAKE. WASHINGTON.                    
                                      AREA =      731 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 170602 -- SALMON: THE SALMON RIVER BASIN. IDAHO.            
                                AREA =    14000 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17060201 -- UPPER SALMON. IDAHO.                        
                                      AREA =     2410 SQ.MI.                    
                        17060202 -- PAHSIMEROI. IDAHO.                          
                                      AREA =      825 SQ.MI.                    
                        17060203 -- MIDDLE SALMON-PANTHER. IDAHO.               
                                      AREA =     1810 SQ.MI.                    
                        17060204 -- LEMHI. IDAHO.                               
                                      AREA =     1270 SQ.MI.                    
                        17060205 -- UPPER MIDDLE FORK SALMON. IDAHO.            
                                      AREA =     1490 SQ.MI.                    
                        17060206 -- LOWER MIDDLE FORK SALMON. IDAHO.            
                                      AREA =     1370 SQ.MI.                    
                        17060207 -- MIDDLE SALMON-CHAMBERLAIN. IDAHO.           
                                      AREA =     1700 SQ.MI.                    
                        17060208 -- SOUTH FORK SALMON. IDAHO.                   
                                      AREA =     1310 SQ.MI.                    
                        17060209 -- LOWER SALMON. IDAHO.                        
                                      AREA =     1240 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        17060210 -- LITTLE SALMON. IDAHO.                       
                                      AREA =      582 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 170603 -- CLEARWATER: THE CLEARWATER RIVER BASIN.           
                              IDAHO, WASHINGTON.                                
                                AREA =     9420 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17060301 -- UPPER SELWAY. IDAHO.                        
                                      AREA =      997 SQ.MI.                    
                        17060302 -- LOWER SELWAY. IDAHO.                        
                                      AREA =     1030 SQ.MI.                    
                        17060303 -- LOCHSA. IDAHO.                              
                                      AREA =     1180 SQ.MI.                    
                        17060304 -- MIDDLE FORK CLEARWATER. IDAHO.              
                                      AREA =      213 SQ.MI.                    
                        17060305 -- SOUTH FORK CLEARWATER. IDAHO.               
                                      AREA =     1170 SQ.MI.                    
                        17060306 -- CLEARWATER. IDAHO, WASHINGTON.              
                                      AREA =     2340 SQ.MI.                    
                        17060307 -- UPPER NORTH FORK CLEARWATER. IDAHO.         
                                      AREA =     1320 SQ.MI.                    
                        17060308 -- LOWER NORTH FORK CLEARWATER. IDAHO.         
                                      AREA =     1170 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1707 -- MIDDLE COLUMBIA: THE COLUMBIA RIVER BASIN BELOW THE        
                     CONFLUENCE WITH THE SNAKE RIVER BASIN TO BONNEVILLE        
                     DAM. OREGON, WASHINGTON.                                   
                       AREA =    29800 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 170701 -- MIDDLE COLUMBIA: THE COLUMBIA RIVER BASIN         
                              BELOW THE CONFLUENCE WITH THE SNAKE RIVER         
                              BASIN TO BONNEVILLE DAM, EXCLUDING THE            
                              DESCHUTES AND JOHN DAY RIVER BASINS.              
                              OREGON, WASHINGTON.                               
                                AREA =    11200 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17070101 -- MIDDLE COLUMBIA-LAKE WALLULA.               
                                    OREGON, WASHINGTON.                         
                                      AREA =     2550 SQ.MI.                    
                        17070102 -- WALLA WALLA. OREGON, WASHINGTON.            
                                      AREA =     1750 SQ.MI.                    
                        17070103 -- UMATILLA. OREGON.                           
                                      AREA =     2540 SQ.MI.                    
                        17070104 -- WILLOW. OREGON.                             
                                      AREA =      881 SQ.MI.                    
                        17070105 -- MIDDLE COLUMBIA-HOOD. OREGON,               
                                    WASHINGTON.                                 
                                      AREA =     2170 SQ.MI.                    
                        17070106 -- KLICKITAT. WASHINGTON.                      
                                      AREA =     1330 SQ.MI.                    
                                                                                
                                                                                
                                                                                
    ACCOUNTING UNIT 170702 -- JOHN DAY: THE JOHN DAY RIVER BASIN.               
                              OREGON.                                           
                                AREA =     7910 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17070201 -- UPPER JOHN DAY. OREGON.                     
                                      AREA =     2130 SQ.MI.                    
                        17070202 -- NORTH FORK JOHN DAY. OREGON.                
                                      AREA =     1830 SQ.MI.                    
                        17070203 -- MIDDLE FORK JOHN DAY. OREGON.               
                                      AREA =      785 SQ.MI.                    
                        17070204 -- LOWER JOHN DAY. OREGON.                     
                                      AREA =     3160 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 170703 -- DESCHUTES: THE DESCHUTES RIVER BASIN.             
                              OREGON.                                           
                                AREA =    10700 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17070301 -- UPPER DESCHUTES. OREGON.                    
                                      AREA =     2140 SQ.MI.                    
                        17070302 -- LITTLE DESCHUTES. OREGON.                   
                                      AREA =     1020 SQ.MI.                    
                        17070303 -- BEAVER-SOUTH FORK. OREGON.                  
                                      AREA =     1530 SQ.MI.                    
                        17070304 -- UPPER CROOKED. OREGON.                      
                                      AREA =     1150 SQ.MI.                    
                        17070305 -- LOWER CROOKED. OREGON.                      
                                      AREA =     1840 SQ.MI.                    
                        17070306 -- LOWER DESCHUTES. OREGON.                    
                                      AREA =     2300 SQ.MI.                    
                        17070307 -- TROUT. OREGON.                              
                                      AREA =      695 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1708 -- LOWER COLUMBIA: THE COLUMBIA RIVER BASIN BELOW             
                     BONNEVILLE DAM, EXCLUDING THE WILLAMETTE RIVER             
                     BASIN. OREGON, WASHINGTON.                                 
                       AREA =     6250 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 170800 -- LOWER COLUMBIA. OREGON, WASHINGTON.               
                                AREA =     6250 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17080001 -- LOWER COLUMBIA-SANDY. OREGON,               
                                    WASHINGTON.                                 
                                      AREA =     1110 SQ.MI.                    
                        17080002 -- LEWIS. WASHINGTON.                          
                                      AREA =     1080 SQ.MI.                    
                        17080003 -- LOWER COLUMBIA-CLATSKANIE. OREGON,          
                                    WASHINGTON.                                 
                                      AREA =      896 SQ.MI.                    
                        17080004 -- UPPER COWLITZ. WASHINGTON.                  
                                      AREA =     1030 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        17080005 -- LOWER COWLITZ. WASHINGTON.                  
                                      AREA =     1460 SQ.MI.                    
                        17080006 -- LOWER COLUMBIA. OREGON, WASHINGTON.         
                                      AREA =      672 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1709 -- WILLAMETTE: THE WILLAMETTE RIVER BASIN. OREGON.            
                       AREA =    11400 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 170900 -- WILLAMETTE. OREGON.                               
                                AREA =    11400 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17090001 -- MIDDLE FORK WILLAMETTE. OREGON.             
                                      AREA =     1350 SQ.MI.                    
                        17090002 -- COAST FORK WILLAMETTE. OREGON.              
                                      AREA =      664 SQ.MI.                    
                        17090003 -- UPPER WILLAMETTE. OREGON.                   
                                      AREA =     1830 SQ.MI.                    
                        17090004 -- MCKENZIE. OREGON.                           
                                      AREA =     1360 SQ.MI.                    
                        17090005 -- NORTH SANTIAM. OREGON.                      
                                      AREA =      771 SQ.MI.                    
                        17090006 -- SOUTH SANTIAM. OREGON.                      
                                      AREA =     1050 SQ.MI.                    
                        17090007 -- MIDDLE WILLAMETTE. OREGON.                  
                                      AREA =      700 SQ.MI.                    
                        17090008 -- YAMHILL. OREGON.                            
                                      AREA =      770 SQ.MI.                    
                        17090009 -- MOLALLA-PUDDING. OREGON.                    
                                      AREA =      883 SQ.MI.                    
                        17090010 -- TUALATIN. OREGON.                           
                                      AREA =      718 SQ.MI.                    
                        17090011 -- CLACKAMAS. OREGON.                          
                                      AREA =      935 SQ.MI.                    
                        17090012 -- LOWER WILLAMETTE. OREGON.                   
                                      AREA =      407 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1710 -- OREGON-WASHINGTON COASTAL: THE DRAINAGE INTO THE           
                     DRAINAGE BOUNDARY TO THE SMITH RIVER BASIN BOUNDARY,       
                     EXCLUDING THE COLUMBIA RIVER BASIN. CALIFORNIA,            
                     OREGON, WASHINGTON.                                        
                       AREA =    23200 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 171001 -- WASHINGTON COASTAL: THE DRAINAGE INTO THE         
                              PACIFIC OCEAN FROM THE STRAIT OF JUAN DE          
                              FUCA DRAINAGE BOUNDARY TO THE COLUMBIA            
                              RIVER BASIN BOUNDARY. WASHINGTON.                 
                                AREA =    6240 SQ.MI.                           
                                                                                
                                                                                
                                                                                
      CATALOGING UNITS  17100101 -- HOH-QUILLAYUTE. WASHINGTON.                 
                                      AREA =     1230 SQ.MI.                    
                        17100102 -- QUEETS-QUINAULT. WASHINGTON.                
                                      AREA =     1190 SQ.MI.                    
                        17100103 -- UPPER CHEHALIS. WASHINGTON.                 
                                      AREA =     1310 SQ.MI.                    
                        17100104 -- LOWER CHEHALIS. WASHINGTON.                 
                                      AREA =      838 SQ.MI.                    
                        17100105 -- GRAYS HARBOR. WASHINGTON.                   
                                      AREA =      568 SQ.MI.                    
                        17100106 -- WILLAPA BAY. WASHINGTON.                    
                                      AREA =     1100 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 171002 -- NORTHERN OREGON COASTAL: THE DRAINAGE INTO        
                              THE PACIFIC OCEAN FROM THE COLUMBIA RIVER         
                              BASIN BOUNDARY TO THE UMPQUA RIVER BASIN          
                              BOUNDARY. OREGON.                                 
                                AREA =     4310 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17100201 -- NECANICUM. OREGON.                          
                                      AREA =      129 SQ.MI.                    
                        17100202 -- NEHALEM. OREGON.                            
                                      AREA =      860 SQ.MI.                    
                        17100203 -- WILSON-TRUSK-NESTUCCU. OREGON.              
                                      AREA =      973 SQ.MI.                    
                        17100204 -- SILETZ-YAQUINA. OREGON.                     
                                      AREA =      753 SQ.MI.                    
                        17100205 -- ALSEA. OREGON.                              
                                      AREA =      697 SQ.MI.                    
                        17100206 -- SIUSLAW. OREGON.                            
                                      AREA =      769 SQ.MI.                    
                        17100207 -- SILTCOOS. OREGON.                           
                                      AREA =      129 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 171003 -- SOUTHERN OREGON COASTAL: THE DRAINAGE INTO        
                              THE PACIFIC OCEAN FROM AND INCLUDING THE          
                              UMPQUA RIVER BASIN TO THE SMITH RIVER             
                              BASIN BOUNDARY. CALIFORNIA, OREGON.               
                                AREA =    12600 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17100301 -- NORTH UMPQUA. OREGON.                       
                                      AREA =     1350 SQ.MI.                    
                        17100302 -- SOUTH UMPQUA. OREGON.                       
                                      AREA =     1790 SQ.MI.                    
                        17100303 -- UMPQUA. OREGON.                             
                                      AREA =     1500 SQ.MI.                    
                        17100304 -- COOS. OREGON.                               
                                      AREA =      739 SQ.MI.                    
                        17100305 -- COQUILLE. OREGON.                           
                                      AREA =     1030 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        17100306 -- SIXES. OREGON.                              
                                      AREA =      467 SQ.MI.                    
                        17100307 -- UPPER ROGUE. OREGON.                        
                                      AREA =     1610 SQ.MI.                    
                        17100308 -- MIDDLE ROGUE. OREGON.                       
                                      AREA =      885 SQ.MI.                    
                        17100309 -- APPLEGATE. CALIFORNIA, OREGON.              
                                      AREA =      759 SQ.MI.                    
                        17100310 -- LOWER ROGUE. OREGON.                        
                                      AREA =      898 SQ.MI.                    
                        17100311 -- ILLINOIS. CALIFORNIA, OREGON.               
                                      AREA =      981 SQ.MI.                    
                        17100312 -- CHETCO. CALIFORNIA, OREGON.                 
                                      AREA =      630 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1711 -- PUGET SOUND: THE DRAINAGE WITHIN THE UNITED STATES         
                     THAT DISCHARGES INTO: (A) PUGET SOUND AND THE              
                     STRAITS OF GEORGIA AND OF JUAN DE FUCA; AND (B) THE        
                     FRASER RIVER BASIN. WASHINGTON.                            
                       AREA =    16800 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 171100 -- PUGET SOUND. WASHINGTON.                          
                                AREA =    16800 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17110001 -- FRASER. WASHINGTON.                         
                                      AREA =      249 SQ.MI.                    
                        17110002 -- STRAIT OF GEORGIA. WASHINGTON.              
                                      AREA =      955 SQ.MI.                    
                        17110003 -- SAN JUAN ISLANDS. WASHINGTON.               
                                      AREA =      626 SQ.MI.                    
                        17110004 -- NOOKSACK. WASHINGTON.                       
                                      AREA =      795 SQ.MI.                    
                        17110005 -- UPPER SKAGIT. WASHINGTON.                   
                                      AREA =     1630 SQ.MI.                    
                        17110006 -- SAUK. WASHINGTON.                           
                                      AREA =      741 SQ.MI.                    
                        17110007 -- LOWER SKAGIT. WASHINGTON.                   
                                      AREA =      447 SQ.MI.                    
                        17110008 -- STILLAGUAMISH. WASHINGTON.                  
                                      AREA =      704 SQ.MI.                    
                        17110009 -- SKYKOMISH. WASHINGTON.                      
                                      AREA =      853 SQ.MI.                    
                        17110010 -- SNOQUALMIE. WASHINGTON.                     
                                      AREA =      693 SQ.MI.                    
                        17110011 -- SNOHOMISH. WASHINGTON.                      
                                      AREA =      278 SQ.MI.                    
                        17110012 -- LAKE WASHINGTON. WASHINGTON.                
                                      AREA =      619 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        17110013 -- DUWAMISH. WASHINGTON.                       
                                      AREA =      487 SQ.MI.                    
                        17110014 -- PUYALLUP. WASHINGTON.                       
                                      AREA =      996 SQ.MI.                    
                        17110015 -- NISQUALLY. WASHINGTON.                      
                                      AREA =      726 SQ.MI.                    
                        17110016 -- DESCHUTES. WASHINGTON.                      
                                      AREA =      168 SQ.MI.                    
                        17110017 -- SKOKOMISH. WASHINGTON.                      
                                      AREA =      248 SQ.MI.                    
                        17110018 -- HOOD CANAL. WASHINGTON.                     
                                      AREA =      957 SQ.MI.                    
                        17110019 -- PUGET SOUND. WASHINGTON.                    
                                      AREA =     2550 SQ.MI.                    
                        17110020 -- DUNGENESS-ELWHA. WASHINGTON.                
                                      AREA =     1270 SQ.MI.                    
                        17110021 -- CRESCENT-HOKO. WASHINGTON.                  
                                      AREA =      774 SQ.MI.                    
                                                                                
                                                                                
  SUBREGION  1712 -- OREGON CLOSED BASINS: THE DRAINAGE OF THE GREAT            
                     BASIN THAT DISCHARGES INTO THE STATE                       
                     OF OREGON. CALIFORNIA, NEVADA, OREGON.                     
                       AREA =    17300 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 171200 -- OREGON CLOSED BASINS. CALIFORNIA,                 
                              NEVADA, OREGON.                                   
                                AREA =    17300 SQ.MI.                          
                                                                                
      CATALOGING UNITS  17120001 -- HARNEY-MALHEUR LAKES. OREGON.               
                                      AREA =     1420 SQ.MI.                    
                        17120002 -- SILVIES. OREGON.                            
                                      AREA =     1310 SQ.MI.                    
                        17120003 -- DONNER UND BLITZEN. OREGON.                 
                                      AREA =      765 SQ.MI.                    
                        17120004 -- SILVER. OREGON.                             
                                      AREA =     1670 SQ.MI.                    
                        17120005 -- SUMMER LAKE. OREGON.                        
                                      AREA =     4100 SQ.MI.                    
                        17120006 -- LAKE ABERT. OREGON.                         
                                      AREA =     1020 SQ.MI.                    
                        17120007 -- WARNER LAKES. CALIFORNIA, NEVADA,           
                                    OREGON.                                     
                                      AREA =     1900 SQ.MI.                    
                        17120008 -- GUANO. NEVADA, OREGON.                      
                                      AREA =     2970 SQ.MI.                    
                        17120009 -- ALVORD LAKE. NEVADA, OREGON.                
                                      AREA =     2110 SQ.MI.                    
                                                                                
                                                                                
REGION 18  CALIFORNIA REGION -- (A) THE DRAINAGE WITHIN THE UNITED STATES       
           THAT ULTIMATELY DISCHARGES INTO THE PACIFIC OCEAN WITHIN             
           THE STATE OF CALIFORNIA; AND (B) THOSE PARTS OF THE GREAT BASIN      
           (OR OTHER CLOSED BASINS) THAT DISCHARGE INTO THE STATE OF            
           CALIFORNIA. INCLUDES PARTS OF CALIFORNIA, NEVADA, AND OREGON.        
                                                                                
                                                                                
  SUBREGION  1801 -- KLAMATH-NORTHERN CALIFORNIA COASTAL. THE DRAINAGE          
                     INTO THE PACIFIC OCEAN FROM AND INCLUDING THE SMITH        
                     RIVER BASIN TO AND INCLUDING THE STEMPLE                   
                     CREEK BASIN. CALIFORNIA, OREGON.                           
                       AREA =    24800 SQ.MI.                                   
                                                                                
    ACCOUNTING UNIT 180101 -- NORTHERN CALIFORNIA COASTAL. THE DRAINAGE         
                              INTO THE PACIFIC OCEAN FROM AND INCLUDING         
                              THE SMITH RIVER BASIN TO AND INCLUDING            
                              THE STEMPLE CREEK BASIN, EXCLUDING THE            
                              KLAMATH RIVER BASIN. CALIFORNIA, OREGON.          
                                AREA =     9230 SQ.MI.                          
                                                                                
      CATALOGING UNITS  18010101 -- SMITH. CALIFORNIA, OREGON.                  
                                      AREA =      788 SQ.MI.                    
                        18010102 -- MAD-REDWOOD. CALIFORNIA.                    
                                      AREA =     1130 SQ.MI.                    
                        18010103 -- UPPER EEL. CALIFORNIA.                      
                                      AREA =      697 SQ.MI.                    
                        18010104 -- MIDDLE FORK EEL. CALIFORNIA.                
                                      AREA =      747 SQ.MI.                    
                        18010105 -- LOWER EEL. CALIFORNIA.                      
                                      AREA =     1510 SQ.MI.                    
                        18010106 -- SOUTH FORK EEL. CALIFORNIA.                 
                                      AREA =      678 SQ.MI.                    
                        18010107 -- MATTOLE. CALIFORNIA.                        
                                      AREA =      485 SQ.MI.                    
                        18010108 -- BIG-NAVARRO-GARCIA. CALIFORNIA.             
                                      AREA =     1230 SQ.MI.                    
                        18010109 -- GUALALA-SALMON. CALIFORNIA.                 
                                      AREA =      343 SQ.MI.                    
                        18010110 -- RUSSIAN. CALIFORNIA.                        
                                      AREA =     1470 SQ.MI.                    
                        18010111 -- BODEGA BAY. CALIFORNIA.                     
                                      AREA =      147 SQ.MI.                    
                                                                                
    ACCOUNTING UNIT 180102 -- KLAMATH. THE KLAMATH RIVER BASIN.                 
                              CALIFORNIA, OREGON.                               
                                AREA =    15500 SQ.MI.                          
                                                                                
      CATALOGING UNITS  18010201 -- WILLIAMSON. OREGON.                         
                                      AREA =     1430 SQ.MI.                    
                        18010202 -- SPRAGUE. OREGON.                            
                                      AREA =     1600 SQ.MI.                    
                        18010203 -- UPPER KLAMATH LAKE. OREGON.                 
                                      AREA =      738 SQ.MI.                    
                                                                                
                                                                                
                                                                                
                        18010204 -- LOST. CALIFORNIA, OREGON.                   
                                      AREA =     2960 SQ.MI.                    
                        18010205 -- BUTTE. CALIFORNIA, OREGON.                  
                                      AREA =      601 SQ.MI.                    
                        18010206 -- UPPER KLAMATH. CALIFORNIA, OREGON.          
                                      AREA =     1400 SQ.MI.                    
                        18010207 -- SHASTA. CALIFORNIA.                         
                                      AREA =      791 SQ.MI.                    
                        18010208 -- SCOTT. CALIFORNIA.                          
                                      AREA =      802 SQ.MI.                    
                        18010209 -- LOWER KLAMATH. CALIFORNIA, OREGON.          
                                      AREA =     1520 SQ.MI.                    
                        18010210 -- SALMON. CALIFORNIA.                         
                                      AREA =      748 SQ.MI.                    
                        18010211 -- TRINITY. CALIFORNIA.                        
                                      AREA =     2010 SQ.MI.                    
                        18010212 -- SOUTH FORK TRINITY. CALIFORNIA.             
                                      AREA =      926 SQ.MI.