The Alawwa rail bridge consists of three 30.5 m ( 100 ft ) spans on masonry abutments and piers anchored into the bedrock .
The Alawwa rail bridge crosses the Maha Oya .
The Alawwa rail bridge , which crosses the Maha Oya , consists of three 30.5 m ( 100 ft ) spans on masonry abutments and piers anchored into the bedrock .