An analysis of the proposed upgrade to dual carriageway's affect on the Blaes Cynon and Usk Bat Sites special areas of conservation.
Dadansoddiad o effaith gwelliannau arfaethedig i’r ffordd ddeuol ar ardaloedd cadwraeth arbennig Blaen Cynon a Brynbuga a’r safleoedd ystlumod yno.