Mammoet powers Seattle

8 January 2018 by Sotiris Kanaris


Mammoet has completed the setting of three transformers for Seattle City Light at the Denny Substation, which is now under construction in Seattle, USA. Mammoet is part of a network of contractors working closely together.

Mammoet successfully hoisted three 125USt transformers using a Liebherr LTM 1400. The crane performed the lifting operations and the setting of foundations from a single location, which was necessary as the compact construction area limited crane movements.

The installation of four 15kV metal clad capacitor banks was also the responsibility of Mammoet. Overhead obstructions prevented the banks from being directly lifted into place. To work around this obstacle the banks were hoisted onto a jack and slide rail system, from which they were set on their foundations.

The project is ongoing and the substation is set to be operational in early 2018.