 That section of the railway had to be resurveyed and was shifted 100 meters south along the bed of Nyaania creek.The creek above Glen Forrest was diverted into Chittawarra Brook while a dam was thrown across the creek just to the west of Glen Forrest to hold back the water while a man made channel was built to replace the original creek bed.On completion of the channel the dam wall was breached and Nyaania Creek was allowed to run into the new channel.