Flash Butt yard BHP's stored Goninan WA ALCo C636 to GE C36-7M rebuild unit 5512 awaits its fate. Rebuilt in 1988 at Goninan's Welshpool factory from a 1970 AE Goodwin built ALCo C636 with serial number G6041-1 and road number 5455 and assigned new serial number 4839-01 / 88-077. It was delivered in Mount Newman Mining orange and was named Hesta. Late 2001.