Typical costs: First, test to see if the popcorn texture contains asbestos. Wet several spots with water and scrape small samples of the material into resealable plastic baggies, then submit them to a lab. Lab tests typically cost $10-$60, depending on the lab and how long it takes to get the results.
Fort Clatsop. From FortWiki. Fort Clatsop (1805-1806) - This fort was the first military establishment to be built in Oregon. It served Lewis and Clark and the 33-member Corps of Discovery as winter quarters in 1805-06 as seven cabins surrounded by a 50 ft square log stockade.
Allegedly, he buried a treasure near his cabin on what is now Fort Columbia. If a treasure is buried there, it will have to stay hidden, as the historic fort is now a Washington State Park. Stevens County - The Lost Doukhober Mine, discovered in 1929, is said to be located in the northern part of Stevens County. Ore from this mine assayed at 1,000 oz of silver per ton.