Restricted access to Kangaroo Valley via Barrengarry Mountain is expected to be available by the end of July.
Severe weather in March resulted in the closure of Moss Vale Road.
Transport for NSW has revealed there are three major sites that need to be repaired and one includes a 50 metre section where the road has completely slipped away.
Duncan Gair who owns Grandpa's Shed at Fitzroy Falls said the closure has had a major impact on his business.
"My business has experienced an 80 to 90 per cent downturn in sales,
"There's just no vehicles coming down Nowra Road,"Mr. Gair said.
Image: Transport for NSW