Workers inside the Etihad Rail tunnel in Fujairah. At 1.8km, T1 is the largest of nine tunnels carved through the Hajar Mountains.
Waterproofing work at the site.
Workers inside the tunnel. It took construction crews more than 300,000 man hours to remove about 500,000 tonnes of rock - an amount similar in weight to all the materials used to build the Burj Khalifa.
The mouth of the Etihad Rail tunnel in Fujairah.
Workers inside the Etihad Rail tunnel in Fujairah. It has been one of the most challenging construction projects seen in the country to date.
A circular scaffold frame painstakingly moves through the tunnel, allowing workers to operate safely through the walls of the snaking shaft of T1.
Waterproofing work inside the tunnel.
A concrete facade was fitted to the face of the tunnel before electric lines with water pipes and drainage channels were added.
The tunnel is big enough to carry two-tier trains, for freight and passengers.
View of the mouth of the tunnel.
Construction work inside the Etihad Rail tunnel in Fujairah.
There are several emergency escape tunnels bored out alongside each of the main passageways.
Workers inside the Etihad Rail tunnel.
Officials working inside the Etihad Rail tunnel in Fujairah.
