Complex sentence: Four official surveys were made in 1922,1936,1942 and as recently as 2008, but the plan failed to take off due to the concerns of railway line passing through the Sathyamangalam Wildlife Sanctuary.
Split into simpler sentences: Four official surveys were made in 1922,1936,1942 and as recently as 2008. The plan failed to take off due to the concerns of railway line passing through the Sathyamangalam Wildlife Sanctuary.