Crawler dozers have been around since… well for a long time. Some of the earliest models were used in California in agriculture. The Balderson family pioneered the use of snow plows on those models when crawler dozers kept rural roads open in the harsh winters of the Great Depression.
In later years we pioneered the use of extra capacity U-blades in coal-fired electric generating stations. That led to the use of many of these specialty dozer blades during construction of the Eisenhower Interstate Highway system.