Water moves from pathway 84 into pathway 88 through a connecting, generally perpendicular pathway 94, generally defined by {HEAD ~ wall section} 96, which extends downward from lower surface 86 to {TAIL ~ the upper end} of wall 92 
extends downward to
Water moves from pathway 84 into pathway 88 through a connecting , generally perpendicular pathway 94 , generally defined by { HEAD ~ wall section } 96 , which extends downward from lower surface 86 to { TAIL ~ the upper end } of wall 92
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH