Z50077000                       USGS 
H50077000       1813090654657007272103SW2101000517.6           32.8             
N50077000       RIO BLANCO AT RIO BLANCO, PR
Y50077000       
350077000       19730905  14200               21.85                      
350077000       19740919   8860               20.33                      
350077000       19750916  12800               21.20                      
350077000       19760801   6640               18.64                      
350077000       19770517   6930               18.93