Canada’s Tilbury Decision Tests Coordinated Impact Assessment

Canada’s environment minister has determined that the potential adverse effects of the Tilbury Phase 2 LNG expansion within federal jurisdiction are justified in light of the project’s expected benefits. The FortisBC proposal would increase liquefaction and storage capacity at an operating industrial site in Delta, British Columbia.

The decision is significant for the way the assessment was conducted. British Columbia’s Environmental Assessment Office carried out a substituted assessment on behalf of the federal government under a cooperation agreement. Federal and provincial bodies coordinated their work, relied on the regulator considered best placed to manage particular effects, and issued complementary requirements rather than running two complete assessments in parallel.

The federal decision includes legally binding conditions covering potential effects on Indigenous Peoples, fish and fish habitat, migratory birds and federal lands. The assessment drew on scientific evidence, Indigenous Knowledge, federal expert advice and public input. Consultation involved 41 Indigenous groups represented by 21 organizations.

Substitution changes accountability, not the standard

The appeal of “one project, one review” is clear. Duplicate processes consume time and expert capacity without necessarily improving environmental outcomes. A coordinated assessment can create one evidence base, align consultation and reduce conflicting information requests. The Tilbury process is the third substituted assessment completed under the amended federal act and British Columbia’s 2018 legislation.

Efficiency becomes risky if fewer procedural steps are mistaken for less scrutiny. Substitution works only when governments agree which jurisdictional effects must be assessed, how federal expertise enters the provincial process and who enforces each condition after approval. The public should be able to trace every material effect to an evidence finding, mitigation measure, monitoring requirement and responsible regulator.

The decision provides an opportunity to test whether this allocation remains clear over time. Construction changes, incidents or monitoring results may cross the boundaries used during assessment. Coordination therefore needs an escalation process as well as an initial division of labor.

Conditions carry the decision’s credibility

The minister’s finding does not mean the project is free of adverse effects. It means those effects were judged justified when weighed against benefits and managed through design, mitigation and enforceable conditions. That distinction should remain visible in public reporting.

Conditions are valuable when they specify an outcome, timing, evidence and consequence. Monitoring fish habitat, migratory birds or effects on Indigenous rights is not enough if thresholds for action are unclear. Effective conditions identify what the proponent must measure, how affected communities participate, when mitigation must change and which authority can intervene.

Indigenous participation is particularly important because assessment is not a one-time consultation exercise. The federal and provincial governments also worked with Tsawwassen First Nation as a modern treaty partner. Long-term governance should preserve access to monitoring data, incorporate Indigenous Knowledge under appropriate protocols and provide a route for concerns to alter operations.

The next evidence begins after the decision

The project is expected to support regional employment, procurement, energy security and resilience. Those are anticipated benefits, not yet demonstrated outcomes. The expansion must still move through permits, construction and operation. Costs, timelines, market conditions and compliance can change the balance described in the decision.

A strong public record would connect the federal decision statement, provincial certificate, permit conditions, compliance inspections and proponent reports. It should show which regulator leads each issue and how overlapping effects are handled. Public reporting should also distinguish a condition being filed from the environmental result it was intended to produce.

Tilbury is therefore a test of regulatory coordination as much as project approval. If one review produces clearer responsibilities, accessible evidence and faster corrective action, substitution can improve both efficiency and accountability. If responsibilities become difficult to trace after approval, procedural streamlining will have displaced rather than solved the coordination problem.