Scottish Water is installing new mains pipework from its Marchbanks Works to its Glencorse Works.

This involves laying new pipes across the Pentland hill-foots in the Colinton area. The route takes it by Torphin Road, across the fields to Torduff Road, Bonaly Road and onwards towards Swanston and Biggar Road. In the Colinton section it is roughly parallel to the City Bypass. The works are expected to take up to two years to cover the full distance. By September 2018, preparation work had started in the field between Torduff Road and Torphin Road.

See Scottish Water's website for more information:
https://www.scottishwater.co.uk/.../south-edinburgh