9. Activities, Infrastructure, Structures and Physical Works - Melgund NWMO Nuclear DGR Impact Assessment

Section Synopsis

Pages: 52-57

The document outlines the preliminary site preparation activities for Canada's Deep Geological Repository (DGR) for used nuclear fuel. Key activities include land clearing, construction of primary and secondary access roads, establishment of temporary facilities (power, water, explosives), and the development of resource management areas for excavated rock and organics. It also details the infrastructure for a worker accommodation camp, water treatment systems, and utility corridors, emphasizing a phased approach to transition from temporary to permanent systems.

Community Assessment Narrative

The project description presents a comprehensive but high-level roadmap for initial site development. While it covers the necessary industrial components of a large-scale nuclear project, there is a recurring reliance on the phrase 'where practicable,' which introduces significant regulatory and environmental ambiguity. The transition from temporary diesel/natural gas power to a high-voltage grid connection (230/115 kV) is a critical path item that lacks a contingency analysis for potential delays in utility infrastructure. Furthermore, the document acknowledges that fresh water sources and treated water discharge locations (within a 2-10 km radius) are not yet finalized, representing a substantial gap in the current environmental impact baseline. The inclusion of an 800-bed worker camp suggests a significant socio-economic footprint that will require robust integration with local municipal services and Indigenous community expectations.

Corrective Measures & Recommendations

The NWMO must replace the 'where practicable' qualifiers with specific, measurable performance standards for environmental protection, particularly regarding the timing of clearing and grubbing to ensure absolute compliance with the Migratory Birds Convention Act. A detailed Hydrogeological Impact Assessment is required immediately to identify the specific freshwater source and model the cumulative effects of withdrawal on local aquifers or surface water bodies; this study must include seasonal variability to ensure the 800-bed camp and industrial processes do not deplete local resources during low-flow periods. Regarding the 2-10 km discharge radius for treated water, the proponent should conduct a site-specific 'Assimilative Capacity Study' for all potential receiving water bodies to determine effluent limits that prevent degradation of water quality or aquatic habitat. The worker accommodation camp strategy needs to be expanded into a formal 'Social Management Plan' that addresses the potential strain on local emergency services, healthcare, and transportation infrastructure, including specific agreements with local municipalities. Finally, the transition from temporary generators to the Hydro One grid must include a 'Grid Connection Risk Assessment' to mitigate the environmental and noise impacts of prolonged diesel or natural gas generator use should the transmission line construction face delays.

On 16 February, 2026 the Impact Assessment Agency of Canada (IAAC), with input from the Canadian Nuclear Safety Commission (CNSC), published a Summary of Issues (SOI) for the proposed Deep Geological Repository (DGR) for Canada’s Used Nuclear Fuel Project, put forward by the Nuclear Waste Management Organization (NWMO). The SOI identifies the key issues that IAAC considers relevant to the federal integrated impact assessment process for the project. NWMO’s response to the SOI will assist IAAC in determining whether an impact assessment is required under section 16 of the Impact Assessment Act. If an impact assessment is required, the issues outlined in the SOI—together with NWMO’s response—will help shape the scope of the assessment and inform the continued development and finalization of the Integrated Tailored Impact Statement Guidelines and associated plans.

Alignments to IAAC Summary (SOI)

Based on a cross-reference of Melgund Township’s assessment of the Initial Project Description (IPD) against the IAAC’s February 16, 2026, Summary of Issues (SOI), there is a strong alignment between the community's specific technical findings and the broader thematic issues identified by the Agency.

Alignment on Infrastructure and Services
Melgund Township’s concern regarding the "800-bed worker camp" and the lack of a corresponding service-load analysis directly supports the IAAC’s findings under the Health, Social, and Economic Conditions section. Specifically, the SOI highlights "Effects of temporary workers on services and infrastructure," noting concerns about the influx of temporary workers and the adequacy of mitigation measures. Melgund’s assessment validates this federal concern by quantifying the influx (800 beds) and identifying specific gaps in planning for police, fire, and health services, which also aligns with the SOI’s Accidents and Malfunctions section regarding "Emergency preparedness" and the ability of local services to respond to emergencies in rural settings.

Validation of Water Sourcing Uncertainties
The community’s observation that water sourcing and discharge locations are defined only by "broad radius or general categories" aligns perfectly with the IAAC’s Groundwater and Surface Water section. The Agency explicitly lists "Water usage" as a key issue, citing "uncertainties about water sourcing" and effects on local drinking water sources. Melgund’s recommendation for "specific geographic coordinates and estimated volumes" provides the necessary technical detail required to address the Agency’s broader concern regarding how project-related water usage will impact hydrological regimes and aquatic habitats.

Gap Identification: Enforceability of Commitments
While the IAAC SOI notes concerns regarding the "clarity... of the Project Description" and the "effectiveness of proposed mitigation measures" (under Other Key Issues Related to the Federal Undertaking), Melgund Township identifies a specific enforceability gap that the SOI does not explicitly detail: the proponent’s use of the phrase "where practicable." The community’s finding that this ambiguous language makes environmental commitments unenforceable offers a critical, granular evidence point that supports the Agency's high-level concern about transparency and mitigation effectiveness.

Alignment on Indigenous Engagement Timing
Melgund’s observation that engagement on water resources is being "deferred to future studies" rather than treated as foundational aligns with the Indigenous Peoples section of the SOI. The Agency flags "Adequacy of Indigenous engagement," specifically questioning the "timing" of information and whether engagement is meaningful. Melgund’s analysis confirms this issue by highlighting that the postponement of discussions regarding water rights and traditional knowledge could lead to late-stage conflicts, reinforcing the Agency's call for the consideration of Indigenous Knowledge in early project planning.

Key Claims

Clearing and grubbing will be timed to avoid bird nesting seasons (mid-May to mid-July) where practicable.

The project will use the best available and economically achievable technologies for water treatment.

A 230 or 115-kilovolt transmission line will be constructed to provide permanent power.

The worker accommodation camp will house approximately 800 people and enforce strict substance-use protocols.

Treated water discharge will occur within a 2 to 10 km radius from the site center.

Underlying Assumptions

Local water bodies or groundwater sources have sufficient capacity to meet project demands without adverse ecological effects.

Regulatory approvals for explosives magazines and forestry management will be granted as per standard mining industry timelines.

Indigenous engagement will lead to a consensus on water source and discharge locations.

The existing logging road can be sufficiently upgraded to handle heavy construction traffic before the primary access road is complete.

Hydro One can provide the required 230/115 kV capacity within the project's initial development window.

Critical Observations & Gaps

Analysis Table

Issue Identified	Implication	Information Required
Undefined water discharge locations within a 2-10 km radius.	Uncertainty in water discharge locations could lead to localized contamination or thermal pollution if receiving bodies are small.	A comprehensive receiving water assessment and thermal plume modeling.
Large-scale worker accommodation camp impacts.	An 800-person influx could overwhelm local services and alter the social fabric of nearby small communities.	A Social Impact Management Plan and community benefit agreements.
Reliance on temporary natural gas/diesel power during initial phases.	Delays in grid connection could lead to higher carbon emissions and noise from prolonged use of temporary generators.	A detailed energy transition timeline and emissions monitoring plan.
On-site explosives management and storage.	Inadequate management of explosives could pose significant safety and security risks in a remote area.	Strict adherence to the Explosives Act and a detailed security response plan.

Working Group Recommendations

Environment

Request immediate identification of specific geographic coordinates for the 'receiving locations' of treated water discharge, rather than the current vague '2 to 10 km radius' description.

The Initial Project Description states that treated water discharge locations are 'still under evaluation' within a broad 2 to 10 km radius. For Melgund Township, this ambiguity is unacceptable as it prevents the establishment of a relevant environmental baseline. Without knowing the specific discharge points, the Environment Working Group cannot assess which local water bodies, aquifers, or private wells might be impacted by effluent. Identifying these locations now allows for the collection of accurate pre-project water quality data, ensuring that any future contamination can be properly attributed to the project. This transparency is essential for protecting the specific local ecosystem and water security of residents.

ENV-110

Human Environment (People)

Request a detailed socio-economic impact analysis of the '800-bed worker accommodation camp' specifically focusing on the strain it will place on regional policing and health services utilized by Melgund residents.

The introduction of an 800-person camp in an area with a small population represents a massive demographic shift. While the text mentions on-site security and 'Fitness for Duty' protocols, it does not address the off-site impacts on the Ontario Provincial Police (OPP) and regional ambulance services that Melgund residents rely on. If these regional resources are diverted to handle incidents at the camp, the response availability for local residents diminishes. This recommendation seeks to ensure the Proponent contributes to expanding regional service capacity commensurate with the population influx, protecting the existing level of service for the community.

HEP-138

Environment

Request a strict definition of the term 'where practicable' regarding the commitment to time clearing and grubbing activities outside of the bird nesting season (mid-May through mid-July).

The Proponent's submission uses the qualifier 'where practicable' regarding the avoidance of bird nesting seasons. In the context of regulatory oversight, this phrase often functions as a loophole allowing construction schedules to override environmental protection. The Environment Working Group must demand a clear set of criteria or a 'stop-work' protocol that defines exactly when economic practicability yields to ecological necessity. Strengthening this definition ensures that the protection of local terrestrial wildlife is a binding commitment rather than a discretionary option, thereby improving the project's environmental integrity and alignment with local stewardship values.

ENV-112

Human Environment (People)

Require a Traffic Impact Assessment that specifically models accident response times from regional hubs (Ignace/Dryden) for the 'high traffic volumes and large vehicles' planned for the Highway 17 intersection.

The filing notes that access roads will connect to Highway 17 and accommodate large vehicles, yet it fails to account for the lack of local emergency services in Melgund. In the event of a collision involving heavy construction transport, the response time for ambulance or police is determined by the distance from regional centers, which can be significant. The Proponent must quantify this risk and propose mitigation measures (such as on-site paramedic staff or funded satellite emergency stations) to ensure that the increased probability of accidents does not result in unmanaged trauma risks for local residents and travelers. This ensures the project's logistics plan accounts for the reality of the local infrastructure deficit.

HEP-139

Human Environment (People)

Challenge the Proponent to demonstrate 100% on-site emergency response self-sufficiency regarding the proposed 'Temporary fuel facility', 'Explosives Management Area', and 'fire water' distribution systems, explicitly excluding reliance on Melgund Township resources.

The Proponent's submission outlines high-risk infrastructure including fuel depots and explosives magazines but relies on standard regulatory compliance which often assumes local municipal support. It is critical to formally document that Melgund Township is an unorganized territory with zero local fire, ambulance, or police services. Reliance on distant regional hubs (Ignace/Dryden) for industrial fire or explosion response creates an unacceptable safety lag. By demanding the Proponent provide full self-sufficiency, the community ensures that the project does not introduce catastrophic risks that cannot be managed locally. This requirement forces the Proponent to internalize the cost of safety, ensuring the project is robust and does not burden the vulnerable, unserviced local context.

HEP-140

Environment

Require the immediate identification of the 'local water body or groundwater source' intended for fresh water supply, moving this from a 'future study' to a baseline requirement.

The Proponent plans to source fresh water locally but defers the identification of the source to future engagement. This delay prevents the Environment Working Group from assessing the current capacity of local aquifers or lakes to sustain such withdrawal without impacting local wells or ecosystem health. By requiring this identification now, the community can verify that the proposed source has sufficient volume to support both the project and existing local needs. This proactive approach prevents conflicts over water scarcity later in the project lifecycle and ensures the baseline data reflects the specific water body at risk.

ENV-111

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Understanding the Impacts of Nuclear Waste on our Community

This digital archive houses the public comments submitted to the Impact Assessment Agency of Canada regarding Project 88774: The Nuclear Waste Management Organization Deep Geological Repository (DGR) for Canada's Used Nuclear Fuel Project. The impact assessment is led jointly by the Impact Assessment Agency of Canada and the Canadian Nuclear Safety Commission. This archive preserves community perspectives, concerns, and observations shared during the assessment process, particularly in relation to Melgund Township, Northwestern Ontario and the communities of Dyment and Borups Corners who are the closest and most impacted of all in the process.