I-5 freeway ‘immersed tunnel’ model on display in Vancouver today
Advocates of the tunnel say the model ‘exposes false assumptions’ by IBRP staff.
bob ortblad
Heated exchange with top Interstate Bridge project official resurfaces
It came during a meeting back in December that just surfaced online.
Interstate Bridge project hits a bump (or should we say, a lift)
Doubt is creeping into I-5 expansion plans.
The overlooked I-5 Columbia River crossing option: An immersed tube tunnel
To Bob Ortblad, a retired civil engineer who lives in Seattle, the team behind the Interstate Bridge Replacement Program (IBRP) – the plan to expand I-5 bridge between Vancouver and Portland across the Columbia River – have it all wrong. While other advocates have proposed alternatives to the highway expansion, like congestion pricing or a … Read more