Z16809400                       USGS 
H16809400       131903-1443933006615010SW220100000.74           10               
N16809400       Cetti River near Umatac, Guam
Y16809400       
316809400       19601019   1420                6.19                      
316809400       19620930   1400                6.12                      
316809400       19621111   1230                5.58                      
316809400       19631204   1130                5.24                      
316809400       19650728    563                3.25                      
316809400       19660908   1210                5.50                      
316809400       19670925   1300                5.80