Technical review of Roberts Bank Terminal 2 environmental assessment

These models are informed by a hydrodynamics and sediment transport model forecasting to 2050 the impacts of the placement of the terminal, expansion of the causeway, and the expansion of the tug basin on surrounding sediment due to changes in waves and ocean currents. [...] In addition to the construction of the new terminal, the Proponent has proposed to widen the north side of the existing Roberts Bank causeway from its east-end connection with the mainland to the entrance to the new terminal. [...] The results indicate increased velocities (+0.1 m/s) in a relatively large area west of the proposed structure, and decreased velocities along the offshore face of the structure (-0.05 m/s) and in the two elbow regions at the junction of the old and new structures (-0.3 m/s). [...] The results indicate an increase in salinity (up to +4 psu) in the shallow area to the north west of the proposed structure, and a decrease in salinity (up to -8 psu) along the north side of the causeway. [...] In addition, not represented by the model results, but mentioned in the report (p.149, EIS Appendix 9.5-A), an increase in wave energy on the east face of the proposed structure is likely, due to the reflection of the incoming waves from the southeast and south direction.