Client: BC Hydro
Location: Lillooet, British Columbia, Canada
Status: Current, 2024 to present
Overview
The challenge. The 220C01 distribution aerial crossing spans the Fraser River at Lillooet, and eight critical poles supporting it require replacement. The configuration is demanding: two four-pole structures facing each other across the river, plus two adjacent poles included for due diligence — and a river crossing behaves as a system, where the tensions on one bank drive the loads on the other.
Our approach. Our scope covers geometric non-linear modelling of every pole — the analysis class this configuration demands, where deflections are too large for linear assumptions — together with foundation analysis for the replacement structures and preparation of the complete design package. All ten poles are assessed as one system rather than individually, so the interaction between the four-pole structures on either bank is captured, not approximated.
The outcome. Work is current (2024 to present): the design package will give BC Hydro replacement structures engineered for the crossing’s true system behaviour.
Services applied
- PLS-CADD modelling and analysis
- Foundation design
- Pole loading analysis
- Design package preparation