Local Nationals MP and Minister for Primary Industries, Katrina Hodgkinson, together with Member for Orange, Andrew Gee, opened the $16.4 million NSW Government funded project.

Mayor Bill West attended the opening and congratulated the community and RMS workers on the project.

"To the community of Gooloogong- this is a great bridge, a wonderful community and something you should all be very proud of," he said.

"While we take advantage of the new bridge, we're hoping a piece of the old bridge may eventually be left in the park as a memorial."

Cr West also congratulated project manager Peter Hamilton and road engineer Tom Carruthers on their commitment and dedication to both the project and the people of Gooloogong.

Acting Cabonne Mayor Lachie MacSmith said the bridge would provide a much safer and more efficient route that will increase productivity for one of the state's key agricultural areas.

Katrina said the project replaced an existing timber truss bridge built in 1904, which has been funded as part of the Bridges for the Bush program.

"Roads and Maritime Services built a wider, safer bridge across the Lachlan River to improve road freight productivity in the region and access to other roads across regional NSW," Ms Hodgkinson said.

"Traffic will be able to drive on the new bridge from 18 February as favourable conditions allowed final work on the bridge approaches to be completed three months ahead of schedule.

"Sixty-nine people clocked more than 34,000 work hours in the building of the new bridge which features 36 60-tonne girders.

"Work on the new 252 metre-long bridge started in September 2013. It has a single lane in each direction with one metre shoulders, providing a considerably safer crossing to the old and narrow single-lane bridge."

Mr Gee said the wider, safer bridge across the Lachlan River will improve road freight productivity in the region and to other roads across regional NSW.

"The Central West is the food basket of NSW and it's therefore vital that we're able to get our produce to market," Mr Gee said.

"Unfortunately it is made more difficult by old timber bridges that should have been replaced long ago.

"Projects such as replacing the existing timber truss Holman Bridge, which was built in 1904, show that regional transport and freight is back on track."

Mr Gee said that traffic will be able to drive on the new bridge immediately.

The old bridge will be demolished at a later date with the community to be advised in advance.