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Heavy downpours led to the collapse of the El Tornillo tunnel on the recently developed Oaxaca-Istmo highway, resulting in a massive landslide.

Construction on the Oaxaca-Istmo highway, a key infrastructure project spearheaded by President Andrés Manuel López Obrador, encountered significant obstacles in June 2025.

Heavy rains resulted in a landslide, leading to the collapse of the "El Tornillo" tunnel on the...
Heavy rains resulted in a landslide, leading to the collapse of the "El Tornillo" tunnel on the newly constructed Oaxaca-Istmo highway.

Heavy downpours led to the collapse of the El Tornillo tunnel on the recently developed Oaxaca-Istmo highway, resulting in a massive landslide.

Tunnel Collapse on Oaxaca-Istmo Highway Stirs Debate

A critical component of the Interoceanic Corridor of the Isthmus of Tehuantepec, the Oaxaca-Istmo highway, has suffered a setback with the collapse of a tunnel along the Mitla-Tehuantepec route. The incident, which occurred during the final stages of construction, has sparked renewed scrutiny of the project's execution, particularly the role of Grupo Carso, the construction firm responsible for the affected tunnel segment.

The Oaxaca-Istmo highway, a flagship infrastructure project of President Andrés Manuel Lopez Obrador, is intended to connect the Pacific and Gulf coasts. The project includes highways, railways, and industrial hubs designed to rival the Panama Canal as a commercial route. The collapsed tunnel was part of a mountainous stretch that had already experienced delays due to complex terrain and disputes with local communities.

Initial reports suggest that heavy rainfall and unstable soil conditions may have contributed to the structural failure. However, due to a lack of information, specific details on the investigation, safety protocol review, or engineering standards pertaining to this event are not available.

President Lopez Obrador acknowledged the incident and expressed frustration but reaffirmed his commitment to completing the highway. Federal authorities have promised a full review of safety protocols and engineering standards in response to the tunnel collapse.

The incident has been reported by El Heraldo de Mexico and TV Azteca Oaxaca. The project, which includes highways, railways, and industrial hubs, is a critical component of the Interoceanic Corridor of the Isthmus of Tehuantepec, a strategic initiative aimed at boosting Mexico's economic growth and regional integration.

As the investigation into the tunnel collapse continues, the focus remains on ensuring the safety of the workers and the quality of the infrastructure. The Oaxaca-Istmo highway project is expected to bring significant economic benefits to the region, and its successful completion is crucial for Mexico's long-term development.

  1. The tunnel collapse on the Oaxaca-Istmo highway, a strategic infrastructure project for Mexico's economic growth, has led to a renewed debate in policy-and-legislation circles and general news concerning the execution of the project, including the roles of construction firms like Grupo Carso.
  2. Amid the scrutiny of the Oaxaca-Istmo highway project following the tunnel collapse, the emphasis lies not only on the investigation's outcome but also on the future safety protocols and engineering standards to ensure the quality of the infrastructure and safeguard workers, essential for Mexico's economic growth and regional integration.

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