The threatened species which sprung to life in the Thurgoona area when drought broke seven years ago has been one of the controversial aspects of the proposed development sandwiched between Kerr and Table Top roads.

At a further workshop on the plan this week, Albury councillors were informed the developer, Peter Bowen Homes, had agreed to set aside 3.5 hectares within the development site for the creation of Sloane's Froglet habitat.

It was estimated to cost $1 million with the areas to eventually become council property.

Planning and development director Michael Keys said the developer had agreed to work with the Office of Environment and Heritage to create wetlands to ensure the froglet's long-term survival.

"They need 300mm in depth to be able to have a viable breeding habitat," he said.

"This is a test case and one in which we have relied on the goodwill of the developer to try and promote and provide an opportunity to see this actually happen.

"There is significant cost in establishing these areas."

Cr Amanda Cohn queried the flood risk to properties in the southern section of the development near the confluence of the Eight Mile and Woolshed creeks.

"It is flood liable land, but it is low hazard and the depth of floodwaters over there will be less than 250mm," Mr Keys said.

"It can quite easily be accommodated in the environmental lands without any significant impost or impact on any other land."

Last-minute concerns raised about the flood risks associated with the main access road into the estate off Table Top Road were also addressed.

The option to build a bridge instead was deemed unnecessary.

"A bridge would have no significant additional benefits in the stream and flood behaviour, but that it would be significantly more expensive and result in substantially more impact in regards to site disturbance and structural footprint,"  the latest council report stated.