Z11442500                       USGS 
H11442500       3847371203702000606017SW18020129449                             
N11442500       SF AMERICAN R BL SILVER C NR POLLOCK PINES CA
Y11442500       
311442500       19700121  222006              15.22                      
311442500       19710326   51506              10.85                      
311442500       19720515   16606               8.35                      
311442500       19730516   40406              10.26                      
311442500       19740709   68006              11.58                      
311442500       19750531   42306              10.37                      
311442500       19751026   21606               8.86                      
311442500       19770610    5716               6.78                      
311442500       19780515   30506               9.61                      
311442500       19790111   47406              10.65                      
311442500       19800113  295006              17.83                      
311442500       19810501   16506               8.34                      
311442500       19820216  246006              16.55                      
311442500       19830313  1680026             14.50                      
311442500       19831117  150006              14.00                      
311442500       19850415   19006               8.45                      
311442500       19860217  251006              16.66                      
311442500       19870213   11606               7.47                      
311442500       19880516    4266               6.17                      
311442500       19890308   46706              10.36                      
311442500       19891024   12906               7.63                      
311442500       19910304   38306               9.87                      
311442500       19920417   11106               7.42                      
311442500       19930122   87406              12.12