Members of the planning committees at Neath Port Talbot County Borough Council and Powys County Council have this week given the project the final go-ahead.
Yr wythnos hon, mae aelodau'r pwyllgorau cynllunio yng Nghyngor Bwrdeistref Sirol Castell-nedd Port Talbot a Chyngor Sir Powys wedi rhoi sêl bendith terfynol i'r prosiect.