<human>:  What is the origin of the term ‘duckboard’?
<bot>: The term “duckboard” is a reference to the fact that duckboards were originally made of wood. Duckboards were used to provide a safe and stable surface for workers to walk on while working on the construction of the Erie Canal. Duckboards were also used to provide a stable surface for workers to walk on while working on the construction of the Panama Canal.