East Hail Squad Mystery Cache

Cache is not located at the posted coordinates.

Solve the puzzle below for the location of the cache.

• I was formed in the last ice age.
• My flat top sits 422' above Lake Sammamish today.
• My profile shows sloping layers of sand and gravel.
• I proudly display my foreset beds.
• Glacial Snoqualmie Lake drained into Lake Sammamish over me.
• Much of me has been hauled away by humans.

I am the ...

Come and see me at N 47 32.[A-4][B-2][C-2]  W 122 02.DEF

Please bring a pen.

Thanks to Doc "O" for the history lesson.

Congratulations to FrodoB and PhilNi on the FTF!

5/30/2021 Update:  New final location.  Please resolve the last step of the puzzle to obtain the final coordinates.