Mae gwaith medrus dros y misoedd diwethaf i osod trawstiau pontydd i adeiladu dwy draphont fel rhan o ffordd osgoi Caernarfon a Bontnewydd bellach wedi'i gwblhau.
Skilled work over the past months to install bridge beams to construct two viaducts as part of the Caernarfon and Bontnewydd bypass has now been completed.