a) a welded wire face mat having an upright portion of {HEAD ~ an extended height} for {TAIL ~ disposition} over a portion of the face of the formation 
for
a ) a welded wire face mat having an upright portion of { HEAD ~ an extended height } for { TAIL ~ disposition } over a portion of the face of the formation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH