Prepared by the LSE Editorial Team. Reviewed by Joseph Andrade, Jr., RN, NRP.
Joseph works across emergency response, healthcare, and workplace safety and develops practical training for civilians, employers, and first responders.
On October 29, 2026, the Occupational Safety and Health Administration (OSHA) published a permanent variance for the Obayashi-Jay Dee Joint Venture at the Cemetery Brook Drain Tunnel Project in Manchester, New Hampshire. The action is a useful case study for contractors, supervisors, and safety managers because it shows what an OSHA tunnel variance actually does.
The short answer is simple. A variance changes the approved method of compliance for a defined employer, workplace, operation, and set of conditions. It does not erase the underlying duty to protect workers.
The project itself is unusually complex. Manchester describes a 2.25-mile, 12-foot-diameter stormwater tunnel with seven drop shafts. OSHA’s project partnership identifies hazards that include confined spaces, hazardous gas accumulation, pressurized working environments, excavation, blasting, slurry systems, and tunnel operations.
| Question | Practical answer |
|---|---|
| Is a variance an exemption? | No. OSHA states that a variance is permission to deviate from a standard under specified conditions, not an outright exemption. |
| Can any contractor copy it? | No. A permanent variance applies to the employer, workplace, operations, and conditions covered by the order. |
| What must the alternative provide? | Worker protection that is equal to or greater than the protection provided by the standard. |
📋 What an OSHA Tunnel Variance Really Means
OSHA’s variance program exists because a prescriptive rule may not be the only way to control a hazard. A permanent variance allows an employer to use an alternative means of compliance after demonstrating, by a preponderance of the evidence, that the alternative protects workers at least as effectively as the original standard.
That is very different from saying the rule no longer matters. The variance order becomes part of the compliance framework for the covered work. Conditions, procedures, equipment, training, monitoring, and documentation described in the order matter because they are part of the basis for OSHA’s approval.
For supervisors, the practical lesson is that alternative compliance often demands more discipline, not less. If the approved system depends on specific monitoring, communications, training, inspections, or emergency procedures, those controls need to exist in the field exactly where the work happens.
⚠️ Project-Specific Does Not Mean Industry-Wide
A permanent variance is not a shortcut that every tunnel contractor can adopt. OSHA’s program allows an employer or defined class of employers to request a variance for specific workplaces. The approved order controls who may use it and under what circumstances.
This distinction matters for subcontractors. A project can have multiple employers working near the same shaft, tunnel, plant, or support system. Each employer still needs to understand its own responsibilities, the project’s controlling procedures, and how its employees interface with the alternative method.
That is one reason contractor coordination is central to complex underground work. The Cemetery Brook strategic partnership separately emphasizes contractor and subcontractor alignment, training, hazard recognition, accountability, and safety-management systems.
🔗 Related: Three OSHA Cases in Two Weeks: Why Trench Safety Failures Keep Repeating
✅ Equal Protection Has to Exist in Practice
The legal standard for a permanent variance focuses on equivalent or greater protection. The operational question is whether those protections survive contact with a changing jobsite.
Tunnel work changes by shift and by location. Equipment moves. Ventilation demands change. Work advances underground. Crews rotate. Contractors enter and leave the project. A control that works on paper can fail if the next crew does not understand it.
- Confirm which workers and operations are covered.
- Translate variance conditions into shift-level procedures and checklists.
- Verify required equipment before work begins.
- Train employees on both the hazard and the alternative control.
- Document inspections, monitoring, and required communications.
- Stop and reassess when field conditions no longer match the approved method.
Supervisors should be able to explain not just what the crew is doing differently, but why the alternative method provides the required level of protection.
For broader supervisory hazard-awareness education, LSE offers OSHA 30-Hour training. OSHA Outreach training does not replace the project-specific or standard-specific training required for tunnel work.
📚 Training Cannot Stop at the Variance Document
Reading an order is not the same as being trained to perform the work. Workers need task-specific instruction that connects the written conditions to actual equipment, alarms, communications, rescue planning, atmospheric monitoring, pressure-related hazards, and changing site conditions.
Competency should be verified where the task permits it. A worker should be able to demonstrate the required sequence, identify abnormal conditions, explain stop-work triggers, and know who must be notified.
🔗 Related: When Online Safety Training Is Not Enough
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📋 What Safety Managers Should Audit
Confirm the employer, location, operation, and equipment actually fall within the variance.
Verify training, authorization, supervision, and handoffs between crews and contractors.
Check monitoring, ventilation, communications, inspections, maintenance, and emergency systems.
Make sure the documentation required by the order and site program is current and retrievable.
The audit question is not simply, “Do we have the variance?” It is, “Are we doing the work the way the variance requires today?”
✅ Key Takeaways
- An OSHA tunnel variance is an approved alternative method, not a blanket exemption.
- A permanent variance requires protection that is at least as safe and healthful as the underlying standard.
- The order is project and employer specific. Other contractors should not assume it automatically applies to them.
- Training, supervision, monitoring, documentation, and contractor coordination determine whether the alternative works in practice.
- OSHA Outreach education can strengthen hazard awareness, but it does not replace required tunnel-specific training.
❓ Frequently Asked Questions
What is an OSHA permanent variance?
It is OSHA authorization for an employer to use an alternative means of compliance when the employer demonstrates that the alternative provides worker protection that is equal to or greater than the protection provided by the standard.
Is an OSHA variance the same as an exemption?
No. OSHA states that a variance is permission to deviate from a standard under specified conditions and is not an outright exemption.
Can another contractor use the Cemetery Brook tunnel variance?
Employers should not assume that they can. The controlling order defines the employer, workplace, operations, and conditions covered by the variance.
Does OSHA 30 replace tunnel safety training?
No. OSHA Outreach provides safety and health education. It does not replace employer training required by specific standards, equipment, tasks, or site conditions.
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📚 Authoritative Sources
- OSHA, Variance Program Overview
- OSHA, Obayashi-Jay Dee Joint Venture; Cemetery Brook Drain Tunnel Project; Grant of Permanent Variance, 91 FR 68173, October 29, 2026
- OSHA, Cemetery Brook Drain Tunnel Strategic Partnership, January 13, 2026
- City of Manchester, Cemetery Brook Drain Tunnel Project Progress Photos
