1935: The two-story lookout structure erected by members of the Civilian Conservation Corps.
July 4, 1935: "Protection against fire hazards was increased when the directors voted to permit the county fire department to use the district's telephone lines from Merced to Exchequer. The line will be connected with a state telephone line from the Williams Peak fire lookout station. Barry J. Dalles, county fire marshal, says fires in the county can be observed quickly from the station and the location of the fire can be telephoned to one of the crews of the five county fire trucks situated in the vicinity of the fire." (The Modesto Bee and News Herald)
October 16, 1936: "The Yosemite Valley was isolated to-day by seven forest and brush fires which disrupted communication and power lines. High winds blocked traffic on the Yosemite Highway and blew down power lines and telephone poles. The gales, sweeping the foothills, were blamed for starting the fires. W.P. Wales, state forest fire lookout at Williams Peak in Mariposa County, reported blazes were threatening Indian Lodge and Pine Grove in the forest reserve." (The Fresno Bee The Republican)