Bridging rivers is always a challenge to Civil Engineers. The construction of 4.556 km long mega Rail cum Road Bridge across river Ganges at Dighaghat/Patna by East Central Railway Construction Organisation is one-in-a-life time opportunity for the people involved with it. Work of this 4.556 km long bridge (36 x 123m 2 x 64m) commenced on 3rd February, 2003 and was dedicated to the nation on 12th March, 2016 by Hon'ble Prime Minister. I was fortunate of being involved with this project during its last phase till commissioning. Documenting experiences during construction is a good practice. The present book is a step towards this, which deals with the various aspects encountered during construction and covers entire technical aspects since stage of conception till completion including in-course changes/improvements supported by design/drawings.