▁of ▁several ▁months . ▁See : ▁ 2 0 0 8 ▁Western ▁Australian ▁gas ▁crisis ▁ ▁As ▁a ▁single ▁tr unk line ▁it ▁is ▁ 1 5 3 0   km ▁long , ▁extending ▁from ▁the ▁Bur rup ▁Pen ins ula ▁in ▁the ▁Pil bara ▁region , ▁to ▁Bun bury ▁in ▁the ▁south ▁west ▁of ▁Western ▁Australia . ▁ ▁It ▁supplies ▁gas ▁to ▁industrial , ▁commercial ▁and ▁resident ial ▁customers ▁in ▁Per th ▁and ▁major ▁regional ▁cent res ▁along ▁the ▁pipeline ▁route . ▁It ▁is ▁covered ▁by ▁Western ▁Australian ▁pipeline ▁lic ence ▁PL - 4 0 . ▁A ▁number ▁of ▁later al ▁pip elines ▁are ▁connected ▁to ▁this ▁pipeline , ▁most ▁of ▁which ▁are ▁covered ▁by ▁separate ▁lic ences , ▁although ▁PL - 4 0 ▁itself ▁covers ▁the ▁main ▁tr unk line ▁and ▁some ▁later als ▁tot alling ▁a ▁length ▁of ▁ 1 7 8 9   km . ▁ ▁History ▁ ▁The ▁idea ▁of ▁a ▁pipeline ▁to ▁transport ▁gas ▁from ▁the ▁North ▁West ▁Sh elf ▁to ▁the ▁south - west ▁of ▁Western ▁Australia ▁had ▁its ▁orig ins ▁in ▁ 1 9 7 5 , ▁following ▁the ▁discovery ▁of ▁large ▁off sh ore ▁res erves ▁by ▁W AP ET ▁and ▁Wood side ▁Pet role um . ▁ ▁Ar ound ▁this ▁time , ▁the ▁State ▁Energy ▁Commission ▁of ▁W A ▁review ed ▁the ▁state ' s ▁future ▁gas ▁requirements ▁in ▁conj unction ▁with ▁the ▁partners ▁in ▁the ▁North ▁West ▁Sh elf ▁cons ort ium . ▁ ▁The ▁developers ▁of ▁the ▁North ▁West ▁Sh elf