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.
Part of the estate became Arlington National Cemetery and the remainder Fort Whipple, named in honor of Maj. Gen. Amiel Weeks Whipple, a division commander at Fort Cass which was established where the stables are today in August 1861.