1938: "A new lookout tower and ground house were constructed on Incline Mountain, northeast of Cathlamet in Wahkiakum County." (Division of Forestry Annual Report)
Air Warning Service Station "Nan 3-9" utilized existing facilities of the State of Washington. A 12 x 20 garage was added using AWS funding. At the end of service the improvements were retained by the State. (from Report of AWS Stations, May 1, 1944)
National Geodetic Survey
DESIGNATION - INCLINE LOT PID - SC1614 STATE/COUNTY- WA/WAHKIAKUM COUNTRY - US USGS QUAD - ELOCHOMAN LAKE (1986)
DESCRIBED BY US GEOLOGICAL SURVEY 1952 LOCATED ABOUT 9 MI SW. OF RYDERWOOD AT INCLINE LOT.
TO REACH FROM STELLA, DRIVE 2.1 MI W. ON U.S. HWY. 830. TURN RIGHT ON GRAVELED RD. 0.1 MI TO RD. FORKS. TAKE RIGHT FORK 1 MI TO RD. FORKS. TAKE RIGHT FORK 0.1 MI TO RD. FORKS. TAKE LEFT FORK 2 MI TO ANOTHER RD. FORKS. TAKE LEFT FORK 3.4 MI TO RD. FORKS. TAKE LEFT FORK 0.1 MI TO INTERSECTION. TURN LEFT, GO THROUGH GATE AND FOLLOW RD. 1.6 MI TO RD. FORKS. TAKE RIGHT FORK 2.2 MI TO RD. FORKS. TURN RIGHT 1.3 MI TO RD. FORKS. TURN SHARP RIGHT 0.4 MI TO STATION.