Bertha shines at night, entering the receiving pit at the North Portal   ©  2017 Catherine Bassetti Photography, all rights reserved worldwide

Bertha shines at night, entering the receiving pit at the North Portal

© 2017 Catherine Bassetti Photography, all rights reserved worldwide

Crew members celebrate the successful long journey of   Bertha, the world's largest diameter EPB TBM.  Seattle, Wa.

Crew members celebrate the successful long journey of Bertha, the world's largest diameter EPB TBM.  Seattle, Wa.

North Portal Exit site, the receiving shaft for Bertha's successful completion of the 2-mile drive beneath the city of Seattle, April 4, 2017

North Portal Exit site, the receiving shaft for Bertha's successful completion of the 2-mile drive beneath the city of Seattle, April 4, 2017