There have been other serious incidents, including a March 23 incident at Pan Pac Forest Products Whirinaki mill which saw worker and First Union site delegate Alistair McAulay admitted to hospital with critical injuries.
He was discharged at the weekend and faces a lengthy rehabilitation.
Napier's Workers Memorial Day commemoration will take place on Monday, starting at 10am, alongside the Napier Seafarers Centre near the Marine Parade entrance to the Port of Napier. It's expected to be attended workmates and families of people killed or seriously injured on the job.
While being held on Monday, it will mark Sunday's 30th anniversary of the first international Memorial Day, April 28 each year and marking the date on which the US established its Occupational Safety and Health Administration in 1971 in accordance with legislation passed the previous year.
It is thought to have been first marked in New Zealand in 1996 and is now marked in more than 100 countries, variously known as Workers' Memorial Day, International Workers' Memorial Day or International Commemoration Day for Dead and Injured. It is also now recognised by the United Nations as the World Day for Safety and Health at Work.
Some commemorations abroad take place on May 1, known as May Day when some countries observe public holidays marking International Workers Day.