Bydd y gwaith yn cynnwys dymchwel ac ail-adeiladu'r draphont goncrit wedi'i hatgyfnerthu lle mae'n ymuno â’r bont ar ochr ddeheuol Dyffryn Ceiriog. Bydd gwaith cynnal a chadw rheolaidd ac ymchwilio’r bont hefyd yn cael ei wneud er mwyn manteisio i’r eithaf ar y cau. Bydd Highways England hefyd yn gwneud gwaith ar eu rhan hwy o'r ffordd rhwng pen deheuol y draphont a chylchfan Gledrid.
The works will include the demolition and re-construction of the reinforced concrete viaduct where it joins its support on the southern side of the Ceiriog Valley. Planned routine maintenance and bridge investigation works will also take place to make the most of the closure. Highways England will also carry out work on their section of the road between the southern end of the viaduct and the Gledrid roundabout.