"There is nothing in the second hut to indicate he reached it and so far our attempts to locate him elsewhere have proved fruitless."
Mr Tinnelly said there was a long period of heavy rain and the river would have been running high if Mr Taylor had "come to grief" while trying to cross it.
However, the whitewater rescue squad had searched the 9km to the Mikonui River mouth without finding him.
Mr Taylor is described as a fit and capable tramper who took it upon himself to carry out maintenance on mountain huts.
"It was a bit of a hobby, he didn't work, just got by on what he had."
The searches have been extensive.
"We have had a chopper scouring the tops and river, the specialist whitewater kayaking team on the river, and five search groups on foot including three tracker dogs, but have not turned up a thing.
"This morning we again have the chopper up and another four ground crew have gone in without success. However, it's a big area and there are some places that we have not covered with ground crews so we are looking at them. Sometimes ground crews find things that the fly-overs miss," Mr Tinnelly said.