The Posted Coordinates will take you to two Signs placed vertically. Read the top Sign.
What is the direction stated in the top Sign?
If North, then Final Coordinates are N47 28.224 W121 45.508.
If South, then Final Coordinates are N47 28.235 W121 45.508.
If West, then Final Coordinates are N47 28.224 W121 45.525.
If East, then Final Coordinates are N47 28.235 W121 45.525.