September 14, 1934: Panorama photos taken by Robert Cooper.
1966: A replacement lookout tower erected. (6th Biennial Report of the Washington Department of Natural Resources)
August 7, 1985: "A 1,300-acre fire raged across wheatfields in north central Washington near Indian Dan Creek Tuesday, threatening livestock and ranches. Okanogan County Sheriff's dispatcher Mike Brewer said deputies evacuated several ranches in the area. Brewer said ranchers attempted to remove some livestock from the area before they were forced to leave. The blaze grew from seven acres to 500 acres in its first hour and burned out of control about four miles north of Pateros. It overran a Department of Natural Resources fire lookout tower which first reported the fire at 2:39 p.m., Brewer said. A wheat farmer reported that a catalytic converter on a vehicle he was driving through his wheat fields started the blaze. Department of Natural Resources spokesman Bill Berrigan said dry conditions in the area helped the fire spread quickly. 'It hasn't had the rain that parts of eastern Washington have had.' The fire burned on state and private land through wheat, grass, sagebrush and scattered pine, Berrigan said. Winds to 10 mph fueled the flames northeast over Knowlton Knob, where the agency's lookout tower was located, he said." (Lewiston Morning Tribune)
August 2014: The tower was overrun by the Carlton Complex Fire, two of the legs were burned through. Even with this major damage the tower remained standing.
2014: Repairs made to stabilize the tower and return the structure to useable condition.
National Geodetic Survey
DESIGNATION - KNOWLTON PID - TP1175 STATE/COUNTY- WA/OKANOGAN COUNTRY - US USGS QUAD - KNOWLTON KNOB (1992)
DESCRIBED BY US GEOLOGICAL SURVEY 1956 TO REACH FROM JCT. OF U.S. HWY. 97 AND SWAMP CREEK RD. IN BREWSTER, DRIVE N. ON SWAMP CREEK RD. 0.1 MI TO RR. TRACKS, CONTINUE STRAIGHT AHEAD ABOUT 200 FT TO RD. FORKS AND ELECTRIC SUBSTATION LEFT. TAKE LEFT FORK AND FOLLOW GRAVEL RD. 1.1 MI TO TOP OF HILL AND BREWSTER CITY DUMP RIGHT, CONTINUE STRAIGHT AHEAD 1.3 MI TO RD. FORKS AND SIGN SWAMP CREEK RD., CONTINUE STRAIGHT AHEAD 1.2 MI TO RD. FORKS AND SIGN KNOWLTON LO. TAKE LEFT FORK 1.8 MI TO RD. FORKS AND SIGN JOHN KNOWLTON. TAKE RIGHT FORK 0.3 MI TO REVERSE Y AND SIGN KNOWLTON LO, CONTINUE STRAIGHT AHEAD 0.9 MI TO RD. FORKS. TAKE RIGHT FORK 1.5 MI TO RD. FORKS AND SIGN KNOWLTON LO. TAKE LEFT FORK 0.6 MI TO RD. FORKS AND SIGN KNOWLTON LO 3. TAKE LEFT FORK 3.0 MI TO TOP AND STATION.
KNOWLTON KNOB LOH--A FS LOH INTERSECTED AND DESCRIBED. NOTE--THE NGS COORDINATES DO NOT AGREE WITH 1956 USGS OBSERVATIONS OF LOH.
DATA--TOP OF LOH IS 14.8 FT AND EAVES ARE 10.4 FT ABOVE STATION MARK.