May perform demolition work, level earth, mix pour and smooth concrete, prepare layouts, erect framework for structures, lay sub floor, apply ceiling and walls, weld, signal operators, and other construction related tasks. About Us Woodruff Construction LLC is a general contractor founded in 1956 which offers award-winning design-build, construction management, and project development services to clients across Iowa with offices in Ames, Fort Dodge, Iowa City, and Waterloo.