Zone 2 means British Columbia and Alberta Receipt Points and Liquids Receipt Points at or upstream of the Blueberry Hill Compressor Station.
Zone 3 means all of that part of the Lower Peninsula south of the line described in subdivision (bb).
Zone 1 means Alberta Receipt Points and Liquids Receipt Points downstream of the Blueberry Hill Compressor Station.
Floodplain or flood-prone area means any land area susceptible to being inundated by water from any source. See "Flood or flooding."
Diameter at Breast Height (DBH) means the diameter of the trunk of a mature tree generally measured at a point four and a half feet above ground level from the uphill side of the tree. For species of trees where the main trunk divides below the 4 ½ foot height, the DBH shall be measured at the highest point before any division.