Leaks at Dublin's Port Tunnel are continuing despite an earlier commitment from the city council that the problem would be resolved by last month.
RTÉ News has seen new footage taken by an insider which shows that six weeks after the original issue was highlighted, the tunnel continues to leak.
Dublin City Council says over the past weeks preparatory work has taken place to allow the repairs to begin.
Italian specialists responsible for installing waterproof membranes have returned to Dublin.
The council says the work will take place at the expense of the contractors. It stresses this will not delay the rest of the work on the tunnel.
But it has not committed itself to a timetable to fix the leaks. It also stresses there is no safety issue.
The original problem occurred when it emerged the concrete was too thin on parts of the tunnel's roof. When contractors tried to remove it they accidentally burst a waterproof membrane.
