 In 1912 the Abermain Coal Co. constructed a branch line to Abermain No.2 Colliery at Kearsley.This branch line and the existing Abermain No.1 Colliery sidings were then worked by the Abermain Co. using their own locomotives to the exchange sidings at Abermain where the East Greta Co. (& later SMR) would then work the trains to and from East Greta Junction.In 1923 Abermain Seaham Collieries Ltd opened Abermain No.3 Colliery on this branch.