Police recovery dogs have been brought in as the search for missing man Kyle Vaughan continues.
The 24-year-old has not been seen since December 2012.
Officers and dogs are searching woodland near the town of Newbridge in Caerphilly.
More top news
The annual survey from the Asphalt Industry Alliance also says local roads in Wales and England are on the edge of terminal decline.
The Environment Secretary has announced a £223 million boost to rural communities
Ann Clwyd reveals she's so disillusioned with the Welsh Assembly that she thinks she was wrong to have backed devolution in two referendums.