"They've done a great job -- a brilliant first-class job and it will last for many years."
Used by logging trucks, sheep trucks, and farming traffic travelling between Alfredton, the busy old bridge had been "pretty much derelict", Mr Palmer said.
"It was dangerous -- it was a wooden one with steel runners and with logging trucks going over it, it was wiggling and waggling -- it was past its use-by date."
Masterton District Council spokesman Sam Rossiter-Stead said the contract to replace the bridge was won by Rotorua-based firm Concrete Structures but the work had been done by Masterton-based employees in an "impressive" timeframe.
The new bridge cost $800,000, 57 per cent of which was funded by NZTA. The initial start date of the project had been delayed by cost-saving changes to the design which had meant getting new building and resource consents, Mr Rossiter-Stead said.