Walking paths, however, won't be built until next year.

The NSW Government announced in June last year that it would provide $100,000 towards the $300,000 first stage of the project to transform the Bathurst Brick Pit quarry site into a wetlands habit for birds.

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The site is on Edgells Lane, off Hereford Street.

Council says detailed plans have been prepared to guide the enhancement of the Brick Pit wetlands and "maximise the habitat for different guilds of birds".

"A substantial component of the project is earthworks to create a range of different habitat types, from very shallow to deeper pools," mayor Bobby Bourke said.

"These earthworks commenced in March 2021 and will continue for much of 2021. Council has been fortunate to secure a supply of material generated from the upgrade of the Great Western Highway by Transport for NSW, and therefore activity at the Brick Pits site will often correspond with the availability of excavated material from that project."

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Works to date, according to the mayor, have also included removing weeds and some waste materials.

"The project team has also sought and received approvals for the works to meet the requirements of various state government agencies and council's policy framework," he said.

Part of this phase of works, according to Cr Bourke, will also include installing a groundwater bore which will supplement the water levels in various parts of the wetlands during dry conditions.

"There are significant earthworks still to be completed and therefore it is not expected that revegetation works will commence until 2022," he said.

"These works are guided by the construction management plan."

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The mayor said the construction of walking paths at the site will start in 2022 "when the major earthworks are complete and council is able to provide safe access for the community".

Cr John Fry said last year that the brick pit site, dating back to the post-war era, presented a "great opportunity to make a recreational, environmental and habitat area for all sorts of species".

"If you put water in here, they'll come," he said.

He said migratory birds from as far away as Indonesia and China were already visiting the site and "if we can enhance this wetland, we'll get more of these birds coming".