The 92-year-old Orange Grove Road bridge - located about 30 kilometres along the road from the Kelvin Road turn-off - had a 20-tonne load limit placed on it last year after a structural inspection found the bridge was in poor condition due to its age.

Now, a combined $1.2 million from the state and federal governments will see it replaced and the well-travelled route more accessible for heavy vehicles.

Gunnedah mayor Jaime Chaffey said the bridge, which was built in 1929, has done well to survive the incredible changes in population and the transport industry over that time.

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"It is deteriorating and a load limit is currently in place, limiting use of the road by heavier vehicles," he said.

"Council thanks our local state and federal members, who have worked with us to make this project possible."

The funding has been allocated through the NSW government's Fixing Country Bridges Program and the federal Bridge Renewal Program.

The remainder will be met by Gunnedah Shire Council.

Parkes MP Mark Coulton said this was a great example of multiple levels of governments working together to deliver key infrastructure projects.

"This vital bridge upgrade will improve safety and connectivity for local road users, freight operators and farmers," Mr Coulton said.

The Orange Grove Road bridge replacement is expected to be completed in the first half of 2022.

While at Gunnedah, Mr Anderson along with Mr Chaffey also visited the Gunnedah Showground to mark the completion of its $1.79 million redevelopment, and Clifton Road to mark the beginning of its sealing.