Plant 3 was constructed in 1975. Early teams there built equipment including balers, small rubber-tire trenchers, and large track trenchers. In the 1980s, as new underground pipeline networks connecting energy sources to markets around the world were developed and the pipeline market took off, bigger and more powerful trenchers entered production, and Plant 3 became known as the "big iron" plant. In 2008, the Plant 3 high bay was constructed to accommodate products such as reclaimers and Terrain Leveler® surface excavation machines (SEM's) that support customers connecting their communities and help manage natural resources. From this high bay, the Vermeer team built the largest piece of construction equipment ever built in Iowa, the T1655III Terrain Leveler SEM. First developed for a customer in Italy who needed a way to transform rocky ground into a vineyard, Terrain Leveler SEMs now help with site-clearing and surface mining resources around the world that are used in buildings, cars, electronics, and medicines. Today, the team in Plant 3 builds more big iron than ever, after several product lines were added there following the July 2018 tornado, reflecting the agility and dedication of Vermeer team members in meeting customer demand.