 HISTORY
  **** SOURCE UNKNOWN--PILES BROUGHT FORWARD FROM DISCONTINUED CHART 6449 PRIOR TO 1969.
  CL1543/74--USPS,  OCT., 1974; PILES IN THE FOLLOWING LOCATIONS (CHARTED NAD 83 POS) WERE NOT VISIBLE:
47-39-51.77 N  122-23-10.79 W 
47-39-51.34 N  12