Highway 1 was completed from Montara to Rockaway Beach in 1937, thereby reopening the local area again to easy northern access. Horace Hill operated the quarry from the early 1940s to 1953, along with a profitable sand dredging business on the quarry's backside. Ideal Cement took over the quarry operation after that time and owned it until 1971; later operators were Rhodes and Jamison and Quarry Products. The quarry ceased operation in 1987, and is currently (2019) being stabilized and restored.