Saudi Tunneling Company for Contracting (STCC), a subsidiary of Hassan Allam Construction Saudi, has been awarded the micro-tunneling works for the waterline supplying the 3rd Ring Road in the Al Adl area of Makkah, Saudi Arabia, for the the National Water Company (NWC).
Our scope of work includes the installation of DN3000 mm reinforced concrete jacking sleeve pipes without liners, followed by the insertion of Ø2500 mm steel carrier pipes and grouting the annular space between the sleeve and carrier pipes.
This critical tunneling operation is part of the new water network, designed to enhance water supply infrastructure in Makkah while maintaining the highest standards of precision and sustainability. Hassan Allam Holding continues to deliver innovative solutions that support essential infrastructure and contribute to the development of key regions in Saudi Arabia.

Saudi Tunneling Company for Contracting (STCC) has been awarded the micro-tunneling works for the waterline supplying the 3rd Ring Road in the Al Adl area of Makkah