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anchor assessed average Bay of Plenty beneﬁts bitumen breakerouts bridge cable logging carriage Carter Holt Harvey chainsaw chip clearfell contractors cost crew cutover cycle days lost delimbing diameter difﬁcult erosion excavator extraction fallers felling Figure ﬁrst ﬁve forest industry Forestry grapple guyline harvesting hauler operator hazards identiﬁed impact increase INDUSTRY RESEARCH ORGANISATION inﬂuence ISSN Kaingaroa Forest Kawau Island landing legwear Limited LIRA LIRO acknowledges LIRO Report load loader log grades loggers LOGGING INDUSTRY RESEARCH logging operations lost time accidents lost time injuries machine Marlborough Sounds mechanised method metres production protection pruning radiata pine reduced reﬂect Report Vol rigging road rope ROTORUA safety sediment signiﬁcant signiﬁcantly silvicultural skid skidder skyline slash slope soil speciﬁc stem stream streamside stump survey Table tension terrain thinning tonnes tracks tractor transport tree length truck tyre Valmet volume winch windthrow workers Zealand Forest