(Submitted by Avant-Garde Engineering (1994) Inc.)

In 1994, Hydro-Quebec decided to dismantle two steel pylons running and  supporting a 450 kV tension line over the St-Lawrence River.

The challenge concerned particularly the dismantling of a 142 meters (465') pylon located on a 75 x 50 meters man-made island in the middle of the  river.

To achieve this challenge, the sub-contractor, DEMEX Inc. from Chicoutimi, Quebec, used the Hydro-Mobile scaffolding system. Two platform units, combined with a telescopic crane and ladders, were then ascended to windswept heights.

Respecting the schedule, 314 metric tons of steel were dismantled.

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