May 1924: "Ranger Foote constructed a cabin and a tower on Jack Knife Mountain last fall. The tower was 50 feet high, having a 14-foot base and a 6-foot platform on top. This tower has 3 bents with double cross braces on each side of each bent, all braces are dapped into the corner posts and thoroughly nailed making the structure absolutely solid. All corners are guyed to large stumps, the guy lines are tightened by use of turnbuckles. There is absolutely no vibration to this tower. The only vibration a person might feel from the top would possibly be from his knees, Ranger Foote put up this tower and also a cabin for a cost of $350.00. L.L.H." (Six Twenty-Six)
February 1928: "Mr. Hougland built an enclosure on the lookout tower last fall." (Six Twenty-Six)
October 11, 1929: “Randolph Riley of Colorado Springs, Colo., who has been stationed on Jack Knife Lookout during the summer was a Sunday dinner guest in the Thomas Forsyth home.” (The Republic News-Miner)
November 4, 1933: “Lieut. Com. Taylor, who has been in charge of Deadman camp since the departure of Major Copthorn several weeks ago, and Lieut. Tomlinson, acc ompanied the men. Fifty-nine men, in charge of Lieut. Paul Long, remained at the camp and will continue the projects which have not yet been completed, and which include the Jackknife trail north from Deadman.” (The Colville Examiner)
Activated: August 27, 1942; Deactivated: July 1, 1943. Seattle Filter Center.