Z09421800                       USGS 
H09421800       3558051144100000404015SW150301011.21           1800.            
N09421800       RINGBOLT WASH NEAR HOOVER DAM, ARIZ.
Y09421800       
309421800       1964       0.00Bm                                        
309421800       19650403   1.002                                         
309421800       196512     1.002Bd                                       
309421800       196708     2.002Bd                                       
309421800       1968       0.00Bm                                        
309421800       1969       10.02Bm                                       
309421800       197008     1.002Bd                                       
309421800       1971       16.02Bm             5.19  Bm                  
309421800       1972       0.00Bm                                        
309421800       1973       0.00Bm                                        
309421800       19740719   1.004                                         
309421800       19750819    2502               6.20                      
309421800       19760908    310                6.47                      
309421800       1980        1257Bm             5.65  Bm1976