The story
2007
Five new SDD9 locomotives delivered. Built by CSR Sifang.
2010
Six reconditioned locomotives delivered for Dynatec Mining, managed and operated by Madarail on their behalf. Supplied by GE/Motive Power & Equipment Solutions, Inc.
2022
Four new G20-3 locomotives delivered. Built by Ferrovias Del Bajio S.A (FVB) (Mexico).
Two BB700 locomotives delivered.
From Wikipedia’s article on Madarail, shared under CC BY-SA 4.0.4