A joint venture of Sylmar-based civil construction firm Tutor Perini Corp. and its subsidiary Frontier-Kemper Constructors ...

Two men believed to be zama zamas who remain trapped in a Rand Leases mine shaft are presumed dead after more than a week underground.

Abstract: Traditional ventilation methods consume excessive energy but still fail to meet requirements in underground tunnel group construction. Thus, a closed-loop intelligent control system for ...

"The tunnel’s design and technology enable two trains to pass at speeds of 250 km per hour. Measures for environmental protection, as well as provisions for ventilation and lighting, have been ...

The project serves as an essential element of Hudson Tunnel Project, with construction slated to begin shortly and aiming for completion by 2029.

4, 2023]. It also requires construction of an access shaft at 12th Avenue that will eventually become part of the tunnel’s ventilation system. The newly awarded contract will deal with sewer and ...

Frontier-Kemper-Tutor-Perini JV on Feb. 3 landed the $1.8 billion Manhattan Tunnel Project contract from the Gateway Development Commission (GDC) Board of Commissioners, which authorized the notice to ...

Four shafts are required to be excavated: Ventilation Shaft – 4.1m diameter (excavated), 243m deep Cable Shaft ... filling the underground works with such force that equipment has been known to be ...

The Tunnel Road Project proposes seamless travel solutions and mobility, but costly flaws and redundancy have drawn criticism ...

Akobo Minerals AB, a Scandinavian-based Ethiopian gold producer, provides an operational update for January 2025 and details ...