Up to 35,000 coal mining jobs could be on the line due to export constraints on the coal corridor as a result of Transnet weaknesses. Coal miner Seriti Power confirmed to Business Times that it has issued a section 189 retrenchment notice at its Klipspruit colliery in Mpumalanga. National Union of Mineworkers (NUM) highveld region deputy secretary Thapelo Malekutu said workers are bearing the brunt of a failing logistics system.