Phase 2 tunnelling works on the Lyon metro Line B extension (Oullins–Saint-Genis-Laval). Covers geotechnical, schedule, and safety risks for TBM operations. Assessment aligned with ISO 31000 and project contract RC-LYM-2024-087.
| # | Risk | L | I | Rating | Mitigation | Owner |
|---|---|---|---|---|---|---|
| 1 | Unexpected groundwater ingress | 4 | 5 | Critical | Pre-tunnelling grouting + continuous piezometer monitoring | D. Lefevre |
| 2 | TBM cutter head wear exceeds forecast | 3 | 4 | High | Stock 2 spare cutter heads on site; weekly wear inspection | M. Kowalski |
| 3 | Utility strike during shaft excavation | 2 | 4 | High | GPR survey + hand-dig within 1.5 m of known utilities | T. Laurent |
| 4 | Subcontractor delay on segment supply | 3 | 3 | Medium | Dual-source agreement; 4-week buffer stock on site | S. Petit |
Action: Complete pre-tunnelling grouting programme across Sections 4–7 before TBM launch. Install 12 piezometers at 50 m intervals along the alignment.
Owner: David Lefevre | Deadline: 28/02/2026 | Status: In Progress
Give operations and project teams a structured format for identifying risks, scoring their likelihood and impact, defining mitigations, and tracking residual risk. This template captures the full risk lifecycle — from initial identification through treatment to periodic review — so risk knowledge is shared across teams and sites.
Try now in EliumA risk assessment is a structured document that identifies potential threats to a project, process, or operation, evaluates each threat by likelihood and impact, and defines the actions required to reduce or eliminate the risk. It creates a shared, auditable record of how an organisation manages uncertainty.
Risk assessments move risk management from informal conversations to documented evidence. In construction, engineering, finance, and regulated industries, they are often mandatory — required by ISO 31000, health and safety legislation, or contractual obligations. Without a standardised template, risk registers vary by team and critical threats go unrecorded. A consistent format ensures every risk is captured, scored, and assigned to an owner who tracks it to closure.
This template is for teams responsible for managing operational and project risk:
The template has two parts: structured metadata fields and the risk assessment body.
Metadata fields classify each assessment:
Assessment body documents each risk:
Capture faster. Paste meeting notes, incident reports, or audit findings into Elium’s AI. It identifies potential risks, suggests likelihood and impact scores, and generates a structured first draft that your risk owner refines.
Retrieve smarter. A project manager asks Elium’s AI: “What risks did we identify on the Lyon metro extension project?” The AI returns the specific risk register entries, mitigation actions, and current status — so lessons from past projects inform new ones.
Risk assessments are living documents — they must be updated as conditions change and accessible to everyone involved in mitigation. When risk registers live in spreadsheets attached to emails, they go stale within weeks. Elium keeps risk knowledge current: structured templates enforce consistent scoring, version control tracks every change, and search lets anyone retrieve past assessments instantly.
Bouygues Construction — 53,500 employees across 80 countries — uses Elium to centralise project and operational knowledge. Risk assessments, quality records, and best practices live in a single searchable platform, ensuring lessons from one project are available to every team across the organisation.
Related reading: Read more on our blog
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