Steel spans sacred site
The site spanned by a recently constructed bridge over Bennett Brook, some ten kilometres north of Perth, Western Australia, has special significance to the local Aboriginal people. It is the home to the Wagyl, a mythical serpent that lives in valleys, under creeks and rivers. Its sacred site status meant that the ground within a 52m-wide strip along the valley could not be penetrated or worked on, with only pedestrian entry allowed during construction.
The challenge facing designers Bruechle, Gilchrist and Evans was to design a bridge that could be constructed economically from beyond this exclusion zone. To further complicate the task, the road alignment combined horizontal and vertical curves with deck superelevation and a 49-degree skew.
Article published on Thursday, 01 January 2015