Regarding the Seismic Reinforcement Project for Large Scale Bridges in Istanbul, viaducts of the Old Golden Horn bridge were retrofitted properly to sustain their functionality even after a big earthquake. Services provided by Miyamoto Turkey included quality control, project management, construction supervision services, the rearrangement of design and erection documents according to local conditions for reinforcement of piers, replacement of the elastomer bearing, expansion joint and parapet, installation of a falling-down prevention device and damper and expansion of pier foundations.