While 76-cap Williams has been persuaded back into the international fold, there is no place for veteran Newport Gwent Dragons back-row Colin Charvis, nor his regional colleagues Michael Owen and Ceri Sweeney.
The Roman Grade I listed Newport Arch has been damaged by vegetation growth and currently has a net in place to prevent loose masonry hitting passing cars and pedestrians.
At the start of the European season Dredge was regarded as Wales' strongest candidate for a place in Colin Montgomerie's line-up at Celtic Manor, Newport in October.