This is the site of an old lookout station associated with Fort Worden. This position provides a view further to the west than any point at Fort Worden. The station could provide early warning and tracking of approaching ships.
I can no longer find the very informative Tibbals Bluff web page with photos that I used to learn about this location.
“An FC station is still located at Tibbals Bluff.”
If anyone has better info- I would be glad to update this page.
Elmira Street Park info here and here.