17 major structures were built as part of the scheme and 99% of the excavated materials were recycled and reused on the bypass.
Adeiladwyd 17 o strwythurau mawr fel rhan o'r cynllun a chafodd 99% o'r deunyddiau a gloddiwyd eu hailgylchu a'u hailddefnyddio ar y ffordd osgoi.