Z15493500                       USGS 
H15493500       6447471471156000202090SW190803061440           478.08           
N15493500       CHENA R NR N POLE AK
Y15493500       
315493500       19720609   9680               12.34   2             12.40
315493500       19730604   6520                9.62                      
315493500       19740520   30002                                         
315493500       19750514  12300               14.18                      
315493500       19760504   5380                8.48                      
315493500       19770520   4760                7.86                      
315493500       19780629   1860                4.14                      
315493500       19790504   9530               12.64                      
315493500       19800702   4540                7.76