UD ▁( 4 % ), ▁and ▁Port land ▁General ▁Electric ▁( 2 . 5 %). ▁ ▁Pl ans ▁to ▁sell ▁the ▁plant ▁began ▁in ▁ 1 9 9 8 . ▁In ▁ 2 0 0 0 , ▁Port land ▁General ▁Electric ▁sold ▁its ▁ 2 . 5 ▁percent ▁share ▁to ▁Av ista ▁Energy , ▁shortly ▁before ▁the ▁plant ▁was ▁sold ▁in ▁its ▁entire ty ▁to ▁Trans Al ta ▁Corporation ▁for ▁$ 5 5 4 ▁million ▁that ▁same ▁year . ▁ ▁References ▁ ▁External ▁links ▁Power ▁Technology ▁– ▁Central ia ▁Power ▁Plant ▁New ▁C CG T ▁Unit , ▁W A , ▁USA ▁ ▁Category : N atural ▁gas - f ired ▁power ▁stations ▁in ▁Washington ▁( state ) ▁Category : Co al - f ired ▁power ▁stations ▁in ▁Washington ▁( state ) ▁Category : Cent ral ia , ▁Washington ▁Category : Build ings ▁and ▁structures ▁in ▁Lewis ▁County , ▁Washington ▁Category : E ner gy ▁infrastr ucture ▁completed ▁in ▁ 1 9 7 2 <0x0A> </s> ▁'' Not ▁to ▁be ▁confused ▁with ▁Tw y ford ▁School . ▁ ▁Tw y ford ▁C ▁of ▁E ▁High ▁School ▁is ▁a ▁co - ed uc ational ▁Church ▁of ▁England ▁Academy ▁school ▁located ▁in ▁Act on , ▁west ▁London . ▁It ▁consists ▁of ▁just ▁under ▁ 1 5 0 0 ▁pup ils ▁aged ▁ 1 1 – 1 8 ▁( with ▁over ▁ 5 0 0 ▁students ▁in ▁the ▁Six th ▁Form ) ▁and ▁has ▁special isms ▁in ▁music , ▁science ▁and ▁languages . ▁On ▁ 1 ▁October