 The wetland setting indicates that the track components must have arrived prefabricated , before being assembled on site , although the presence of wood chips and chopped branches indicates that some trimming was performed locally . The track was constructed from about 200 @,@ 000 kilograms ( 440 @,@ 000 lb ) of timber , but Coles estimates that once the materials were transported to the site , ten men could have assembled it in one day . 
