Z07091000                       USGS 
H07091000       3843591060937000808015SW1102000182.7           8113             
N07091000       CHALK CREEK NEAR NATHROP, CO
Y07091000       
307091000       194906                         3.40  Bd                  
307091000       19500602    370                1.96                      
307091000       19510528    448                2.10                      
307091000       19520610   1050                2.70                      
307091000       19530613    720                2.40                      
307091000       19540522    155                1.53                      
307091000       19550609    399                2.02                      
307091000       19560603    640                2.35                      
307091000       1979        590Bm              2.59  Bm                  
307091000       19810711    525                2.50                      
307091000       1982        630Bm              2.70  Bm                  
307091000       1984        880Bm              3.04  Bm                  
307091000       1985       1020Bm              3.31  Bm                  
307091000       1986       1400Bm              3.55  Bm                  
307091000       1987        890Bm              3.05  Bm                  
307091000       1988        400Bm              2.23  Bm                  
307091000       1989        420Bm              2.27  Bm                  
307091000       1990        168Bm              1.65  Bm                  
307091000       19910613    900                3.07                      
307091000       19920428    725                2.85                      
307091000       19930618    890                3.05