Balfour Beatty Jones Brothers (Ruthin) have a site office on Seiont Mill Road, Caernarfon LL55 2YL, open during normal business hours.
Mae gan Balfour Beatty Jones Brothers (Rhuthun) swyddfa ar y safle ar Ffordd Felin Seiont, Caernarfon LL55 2YL, sy’n agored yn ystod oriau busnes arferol.