A supermarket chain is set to move onto the former Buckley's Brewery site in Llanelli.
The former Buckley's Brewery site.
German chain Aldi has submitted detailed planning permission for a road access and bridge serving the brewery site in the centre of the town.
The site has been empty since brewing stopped there in 1997 when the operation was transferred to the Brains Brewery in Pontyclun, near Cardiff.
Outline planning consent already exists for a discount food store, restaurant and housing on the site.
Aldi would operate the 760sqm store which would have parking for over 100 cars on either side of the Afon Lliedi.
A new foot bridge would cross the river, which would also be landscaped.
I'm still of the opinion it will cause traffic chaos - especially at peak times
Under the plan some of the existing brewery buildings would be converted into 20 houses while another 45 homes would be built on land set to be cleared.
It is believed the residential aspect of the scheme has already attracted interest from housing associations.
Carmarthenshire councillors turned down an earlier outline application for the development but Brains Brewery, which owns the land, had the decision overturned on appeal by the Welsh Assembly.
Members were worried about the traffic flow along Water Street but Aldi wants to build a new junction controlled by traffic lights opposite the Agenda television studios.
Councillor Edward Skinner said: "I'm still of the opinion it will cause traffic chaos - especially at peak times.
"Traffic already backs up at the roundabouts either end of Water Street and another set of traffic lights in the middle will just make things even worse."
There were also concerns about motorists using the main road through the site as a short cut through town but as part of the plan Aldi will block off the northern access to Swanfield Place.
Carmarthenshire Council's highways department will now examine the plan but did not raise objections to the original outline application.