Pull testing marine bollards has long been the standard for verifying mooring integrity, but it carries significant risks to personnel, vessels, and quayside infrastructure. Harbour masters increasingly seek pull testing alternatives that reduce risk while providing reliable insights into bollard health.
In this post, we explore documented incidents that highlight the risks of relying solely on pull-testing and visual inspection, and why safer alternatives like non-destructive testing (NDT) are becoming essential.
Real-World Bollard Failures
Valaris DS-16, Mississippi, USA (2022)
During strong winds at a shipyard in Pascagoula, a pier bollard failed at the base and was ripped from the quay. The drilling unit broke away, drifting across a channel and colliding with a bulk carrier. Post-incident investigations revealed significant corrosion and structural degradation of the bollard anchor. Damage was estimated at nearly US$5 million.
Helsinki Bridge, Europe (2019)
Five head lines were secured to a single bollard at one pier. Under rising wind, the bollard failed, and the remaining mooring lines parted. The vessel drifted and collided with a cruise-terminal pier. This incident highlights the risk of overloading a single bollard beyond design limits.
IMCA Case – Cargo Barge Deck Bollard Failure
A bollard on a cargo barge was pulled from the deck during mooring operations. The rope did not fail, but the bollard struck a rigging-team leader, causing serious injury. Investigations revealed failure near a weld point and a lack of internal inspection, illustrating that even seemingly sound bollards can harbour hidden weaknesses.
USCG Safety Alerts – Shore-side Bollard Failures
The US Coast Guard has documented multiple incidents where shore-side bollards failed due to rotting pilings, undetected fractures, or degraded foundations. In these cases, vessels were cast adrift, creating serious risk to personnel, infrastructure, and other ships.
What These Failures Reveal
Even when a bollard looks sound, hidden issues can compromise its integrity:
- Corrosion or wastage in the bollard base or anchor
- Structural weaknesses from modifications or repairs
- Overloading due to poor line distribution
- Cumulative degradation over time from environmental exposure
Traditional pull-testing or visual inspection often misses these internal weaknesses, providing a false sense of security. Harbour masters frequently describe the anxiety that comes with this uncertainty. This “low-level dread” is common and it underscores why safer, more informative methods of assessment are essential.
Why Non-Destructive Testing (NDT) is a Safer Alternative
NDT represents a key pull testing alternative, offering actionable insight without the risks of extreme loads:
- Detect hidden flaws: Techniques such as ultrasonic testing, eddy current inspection, and ground-penetrating radar (GPR) can detect internal corrosion, cracks, anchor degradation, or voids in the bollard foundation before failure occurs.
- Preserve quay infrastructure: No snapping lines, pulled-out bollards, or quayside damage during inspection.
- Support SWL verification and audits: Creates a verifiable record for compliance and insurance.
- Extend bollard service life: Allows safe load adjustment rather than full replacement.
- Reduce operational stress: Harbour masters gain confidence in the reliability of mooring infrastructure.
At EP Marine & Rail, we use NDT protocols specifically designed for marine bollards and surrounding infrastructure. In an upcoming post, we’ll dive deeper into the specific pull testing alternatives and NDT methods we employ, showing how ports and harbours can maintain safety and efficiency while minimising risk.
For harbour masters, the takeaway is clear: bollard failure is a real and documented risk under environmental and operational loads, and traditional pull testing or visual inspections often fail to detect hidden defects. Harbour masters are acutely aware of the pressure and anxiety associated with relying solely on these conventional methods. By adopting safer pull testing alternatives like NDT, ports and harbours can better protect personnel, vessels, infrastructure, and reputation, while gaining confidence in the reliability of their mooring systems.