Original sentence: It flows generally west northwest then north entering the Oxley Wild Rivers National Park and after about 19 km (12 miles) to its confluence with the Yarrowitch River about 16 km (10 miles) north east of Yarrowitch
Edited sentence: It starts at an elevation of 1,010 metres, flows generally west northwest then north entering the Oxley Wild Rivers National Park and after about 19 km (12 miles) to its confluence with the Yarrowitch River about 16 km (10 miles) north east of Yarrowitch.The Warnes River drops around 577m over its 23.1km length.The Warnes River ends at an elevation of 437 m before merging with the Yarrowitch River