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The derrick supports the crown block and provides a place to stack pipe that is pulled out of the hole. The depth rating of the derrick is related to the size of the rig. The height of the derrick is commonly referred to in multiples of pipe joints (a joint of pipe is approximately 30 ft long). Rigs that can stack double joints of drill pipe are called double derricks, and those that stack three joints are called treble derricks. Part way up the derrick are the monkey board (3) and pipe fingers. The derrickman handles the top end of each stand of pipe from the monkey board during trips.
Dakota Access, LLC plans a permanent 50 foot (15 m) easement and an up to 150 foot (45 m) construction right of way for the pipeline. It has said the 30-inch (75 cm) diameter pipeline would be at least 48 inches (122 cm) underground from the top of the pipe or 2 feet (60 cm) below any drain tiles.