An independent inspector held a public local inquiry in March and April 2014, where supporters and objectors to the scheme were able to present their case.
Cynhaliodd arolygydd annibynnol ymchwiliad lleol cyhoeddus ym Mawrth ac Ebrill 2014, lle cafodd cefnogwyr a gwrthwynebwyr y cynllun fynegi eu barn.