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    • Historical Equipment

    Raymond Q. Armington Collection, HCEA Archives
    The unique scraper wheel steering is demonstrated by what is believed to be a 1MDT-6SH. Rated at 10 yards, it was powered by an International Harvester TDRM diesel.
    Earthmoving

    The Evolution of Euclid's Motor Scrapers

    Tom Berry
    Jan. 28, 2025
    Euclid experimented with bottom and side dump prototypes.
    Bureau of Public Roads Manuscript Collection, Idaho State Archives
    Knox Yellow road scraper.
    Earthmoving

    Building the Knox-Yellow Pine Road by Hand

    Tom Berry
    March 19, 2024
    Horse-drawn scraper eased some of the manual labor.
    Doug Osborne Papers, HCEA
    Galion Little Master
    Paving Equipment & Materials Production

    Machines You Won't See at World of Asphalt

    Tom Berry
    Feb. 13, 2024
    Cutting edge machines from the early 20th Century.
    HCEA archives
    LeTourneau-Westinghouse C Tournadozer
    Earthmoving

    LeTourneau and the advent of the wheel dozer

    Tom Berry
    Oct. 20, 2023
    R.G. LeTourneau solved problems inherent with crawlers by mounting a blade on a wheeled tractor.
    Mixermobile Manufacturers, HCEA Archives
    Mixermobile Twin Truckmobile
    Historical Equipment

    Mixermobile Twin Truckmobile powered by twin 90-horsepower engines

    Tom Berry
    Sept. 22, 2023
    Built in the early 1940s, the Twin Truckmobile hit a road speed of 50 mph.
    Caterpillar image, Maier-Dailey Papers, HCEA Archives
    On a road job near Galva, Illinois, in September, 1938, a Cat D4 with a High Loader is spreading fill, plus towing a disc and a pneumatic roller. It also ditched, placed pipe, and cleared brush. The machine handled excavation as well, including overburden, gravel, and earth and rock cuts.
    Earthmoving

    The Trackson High Loader attachment

    Tom Berry
    July 5, 2023
    Primarily used with Caterpillar tractors