Former forestry worker Rex Keenan, who worked for the Forest Service for 14 years and was a field supervisor when it was wound up, said the closure was a huge blow for the region at the time.
Some people found work with the newly-formed Department of Conservation or Timberlands, which were formed out of the restructure, but a large number were put out of work and left the West Coast.
Reunion co-organiser Anthea Keenan said hundreds of jobs were also lost from the Railways, Ministry of Works, Post Office and coalmines at the same time.
Thirty years on, ex-workers from as far away as Hamilton and Nelson will be returning for a weekend of reminiscing over the next three days.
"Jim Staton with be acting compere for the weekend programme starting (this) evening, where both he and Cam Barrowman will open the weekend of reminiscing," Mrs Keenan said.
"The likes of John Ward and Lindsay Arthur are teed up to speak Saturday evening and no doubt a few yarns will be spun," she said.
"Just over 50 people have confirmed, some travelling from afar to meet up again, 30 years since the government restructured the service."
The reunion is an encore from a larger one held five years ago on the 25th anniversary, when about 200 people got back together.
- Hokitika Guardian