Scope - What This Guide Covers
This guide focuses on safety compliance for horizontal directional drilling (HDD) operations, specifically on preventing struck-by hazards during equipment maintenance and drill stem handling. It's intended for safety engineers, compliance managers, and site supervisors overseeing HDD operations and ensuring OSHA compliance under the Occupational Safety and Health Act.
We'll examine the March 17, 2026 incident at a New Smyrna Beach worksite, where OSHA cited T & T Pipeline Co. Inc. for willfully exposing workers to struck-by hazards during drill bit replacement. OSHA proposed $165,514 in penalties for this violation.
Use this guide to review your HDD safety protocols, train field supervisors, and establish lockout procedures for rotating equipment.
Key Concepts and Definitions
Horizontal Directional Drilling (HDD): A trenchless method for installing underground pipelines using a rotating drill stem to bore through soil. The drill stem remains under tension and rotational force during operations.
Struck-By Hazard: Occurs when workers are in the path of moving objects or equipment. In HDD operations, this includes rotating drill stems, moving pipe sections, and equipment under mechanical stress.
Willful Violation: OSHA's most serious citation category, indicating that your organization knew about a hazard or showed plain indifference to employee safety. Penalties start at $10,000 and can exceed $150,000 per violation.
Lockout/Tagout (LOTO): Energy control procedures that prevent unexpected startup of equipment during maintenance. For HDD machines, this means isolating rotational, hydraulic, and electrical energy sources before workers approach the drill stem.
Requirements Breakdown
OSHA General Duty Clause (Section 5(a)(1))
Even without a specific HDD standard, employers must provide a workplace "free from recognized hazards that are causing or are likely to cause death or serious physical harm." Rotating drill stems during bit changes are a recognized hazard in your industry.
Machine Guarding Standards (29 CFR 1926.300)
Subpart I requires guarding for rotating parts that could cause injury. Your HDD machine's drill stem qualifies. If workers need to approach the stem during maintenance, you must implement energy isolation procedures.
Control of Hazardous Energy (29 CFR 1910.147)
This lockout/tagout standard applies when workers service equipment with stored energy. Your HDD drill stem maintains rotational momentum and hydraulic pressure even after operators stop the machine. You need written procedures that:
- Identify all energy sources (hydraulic, rotational, electrical)
- Specify shutdown sequences
- Require physical locks on energy isolation points
- Verify zero energy state before work begins
Personal Protective Equipment (29 CFR 1926.95)
Hard hats, safety glasses, and steel-toed boots are baseline requirements. But they won't protect workers from a rotating drill stem. Your real protection comes from keeping workers away from the hazard zone until energy is isolated.
Implementation Guidance
Before Any Drill Bit Change
Create a written procedure that every crew can follow without supervision. It should include:
- Communication protocol: Who announces the bit change? Who confirms all personnel are clear?
- Machine shutdown sequence: Specific steps to stop rotation, relieve hydraulic pressure, and engage mechanical brakes.
- Energy verification: How do you confirm the drill stem won't rotate? (Try to turn it manually, check pressure gauges, verify brake engagement.)
- Approach authorization: Only the designated mechanic approaches the drill stem, and only after the site supervisor confirms lockout completion.
Designate a Competent Person
OSHA requires a competent person for many construction activities. For HDD operations, this person should:
- Inspect the drilling machine daily for worn brakes, hydraulic leaks, and control malfunctions
- Stop work if energy isolation procedures aren't followed
- Conduct weekly toolbox talks on struck-by hazards
- Review near-miss incidents (like a drill stem that started rotating unexpectedly)
Leadership's Role in Safety Culture
The willful citation against T & T Pipeline suggests OSHA found evidence the company knew about the hazard but failed to act. Your leadership team prevents this by:
- Attending site safety briefings: When your VP of operations shows up for a pre-shift meeting, crews notice.
- Asking specific questions: "Show me your lockout procedure for the HDD machine" is more effective than "Are we being safe?"
- Responding to near-misses: If a worker reports that the drill stem moved during maintenance, treat it as seriously as an actual injury. Investigate, document, and fix the procedure.
Training Documentation
OSHA will ask for proof that workers understood the hazard. Your training records should show:
- Initial training on HDD-specific LOTO procedures (with signatures and dates)
- Annual refresher training
- Retraining after any incident or near-miss
- Competent person qualifications and authority
Common Pitfalls
Assuming experienced crews don't need written procedures: The worker killed in the March 2026 incident likely wasn't new to pipeline work. Expertise doesn't eliminate hazards. Written procedures create consistency across shifts and crews.
Relying on the machine's stop button: HDD drill stems can continue rotating due to hydraulic pressure, momentum, or brake failure. Your procedure must verify zero energy, not just assume it.
Skipping lockout for "quick" maintenance: Bit changes feel routine after you've done a hundred of them. That familiarity breeds complacency. Every bit change gets the full lockout procedure.
Treating OSHA citations as bad luck: A $165,514 penalty isn't the cost of doing business. It's evidence that your safety program failed. The financial hit matters, but the reputational damage matters more. Clients, insurers, and prospective employees will find the citation in public records.
Underestimating leadership visibility: If your site supervisors believe management cares more about schedule than safety, they'll take shortcuts. Your executive team needs to visit sites, participate in safety meetings, and visibly reward crews who stop work for safety concerns.
Quick Reference Table
| Task | Hazard | Control | Verification |
|---|---|---|---|
| Drill bit replacement | Rotating drill stem | LOTO procedure: shut down machine, relieve hydraulic pressure, engage mechanical brake, lock controls | Attempt manual rotation of stem; check pressure gauges read zero |
| Drill stem handling | Struck-by from moving pipe sections | Exclusion zone around drill path; spotter to warn of movement | Visual confirmation all workers outside marked zone |
| Machine startup after maintenance | Unexpected rotation with workers nearby | Lockout removal only by authorized person; visual sweep of work area | Headcount before removing locks; verbal "all clear" from crew |
| Daily operations | Equipment malfunction causing uncontrolled rotation | Pre-shift inspection by competent person; brake and control testing | Documented inspection checklist signed by competent person |
| Emergency shutdown | Workers unable to stop machine quickly | Emergency stop buttons within reach of all work positions; kill switch training | Monthly test of emergency stops; drill response scenarios |
Your next step: Pull your current HDD procedures and compare them against this guide. If you don't have written lockout steps for drill bit changes, create them this week. If you have procedures but they're not being followed consistently, that's a leadership problem. Schedule a site visit and watch a bit change happen in real time.
The T & T Pipeline citation shows what happens when organizations treat worker safety as optional. You can't undo a fatality with a revised procedure. Build the protection now, before OSHA shows up with a citation.
