Power. MAPNA Power Plant Construction and Development Company (MD-1), MAPNA Combined Cycle Power Plant Construction and Development Co. (MD-2), and MAPNA Special Projects Construction and Development Company (MD-3) are involved in the construction of gas turbine power plants, combined cycle power plants (i.e. gas turbine plus HRSG), and power plant for petroleum industries. MAPNA Engineering Co. "("MONENCO Iran")" is a design and consultancy company for utility projects. MONENCO was created as a joint venture between the Montreal Engineering Company and the Iranian state before the 1979 revolution. The government's share was acquired by MAPNA in 1997, whilst Montreal Engineering's share passed to AGRA and then AMEC with that company's acquisition history. NASBNIROO undertakes construction of electrical transmission infrastructure, fuel storage tanks and other construction work.