Overview
- The derailment near kilometer Z‑230 between Nizanda and Chivela in Oaxaca left 13 dead and 98 injured, according to the state government.
- The federal audit office reported deficiencies in Line Z works from 2020 to 2023, including missing technical evidence and supervision failures, with potential public losses exceeding 33.5 million pesos.
- In the 2023 review, the ASF cited excess payments totaling 28.85 million pesos, including an 8.56 million peso overcharge tied to contract FIT-GARMOP-OP-Z-17-2022.
- EL CEO reported that Comsa was contracted for the Z‑228 to Z‑243 stretch that includes the accident point, and noted the contract file was later removed from the transparency platform.
- Project documents acknowledge severe geometry on Line Z—curves of 9–12 degrees and grades up to 2.2%—and authorities have not confirmed whether the exact site had corrective works or special operating limits.