Founded in 1964, N. B. Harty General Contractors specializes in providing explosive boiler cleaning services. It provides cleaning services for reheaters, silos, burners, waterwalls, superheaters, slag taps, ash hoppers and fluidized beds. N. B. Harty General Contractors utilizes explosives to deslag various corners of electrical boilers. It specializes in cleaning a variety of boiler brands, such as Foster-Wheeler, Riley Stoker, Combustion Engineering and Babcock & Wilcox. The firm also works in partnership with other companies to provide advanced pollution control services. Additionally, it specializes in removing frozen coal and coal piles from rail cars. N. B. Harty General Contractors is located in Dexter, Mo.