Abu Dhabi's 'green' tunnel to be completed by 2015
The Strategic Tunnel Enhancement Programme costs $1.5bn (AED 5.7bn)
Gulf News reports that the construction of a 41km-long eco-friendly tunnel for the Abu Dhabi sewerage network in on schedule to be completed by early 2015.
According to Alan Thomson, managing director, Abu Dhabi Sewerage Services Company (ADSSC), the 41km-long main tunnel, as well as the 42km-long link service tunnel, will both be completed by the first quarter of 2015.
The project, which includes pumping stations to be completed by the end of 2015, will be commissioned in phases, and it is expected to be operational by 2016. The entire project, called the Strategic Tunnel Enhancement Programme (STEP), will cost $1.5bn (AED 5.7bn).
Besides reducing the carbon footprint of Abu Dhabi’s sewerage system, the eco-friendly tunnel will also help save $1.1bn (AED 4.2bn), which can then be spent on energy and maintenance costs for the next 25 years.
The deep tunnel, which starts at 27m underground and reaches a depth of 100 metres, is not expected to require regular maintenance for the next 80 years. The new tunnel will also help replace 34 pumping stations in the existing system that consume huge amounts of energy with just one pumping station at Al Wathba treatment plant.
In addition, the tunnel, which will extend from Karama in Abu Dhabi to Al Wathba treatment plant, will triple the capacity of Abu Dhabi’s sewerage network as well. The existing system deals with 400,000m3 of sewage a day, but the new tunnel can carry 1.7mn m3 of sewage, which is the expected demand by 2030.