THE Tunneling Association of Nigeria, TAN, has called for government and private sector investment in underground infrastructure to bridge the country’s infrastructural gaps.   National Chairman, TAN, Mr. Abidemi Agwor, who described tunneling as the act of creating useful and effective space below ground level told Vanguard that the current  economic challenges in the country serve as an opportunity to invest in tunnel technology as developing a tunnel or an underground space will enable  Nigerians to maximize the use of space and thereby adding more value the fixed assets.

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