WTC Mangga Dua Waterproofing Project WTC Mangga Dua Jl. Mangga Dua Raya Jakarta – Indonesia Completion Date Product Volume 2003 HPI System 7,788 m3 Area Completed : Basement Slab & Retaining Wall, Lift and Escalator Pits, Sump Pits, STP, WTP, GWT, Genset Area Architect PT Enviro Tec Indonesia Engineer PT. Davy Sukamta & Partner Contractor Murinda Tata Jo Developer/Owner Djarum Group