Side Dump Train (SDT) Completed in October of 1955, the Side Dump Train had 3 side dumping bins. The SDT would never leave LeTourneau’s Longview, TX facility. The SDT saw zero orders. Recent Articles R. G. LeTourneau’s Overland Trains: a complete history is now AVAILABLESeptember 17, 2022 There were 6 Overland TrainsJanuary 21, 2022 Overland Trains Video by CalumDecember 17, 2021 Abbreviations and AcronymsJuly 28, 2021