Update 12-Oct-2020
Scottish Water started their works in Colinton Dell on 12 October 2020. The works are scheduled to last for 25 weeks. They have the use of ground in the former Colinton Station area for their works compound. Works were planned to have started ealier, but were suspended at the end of March due to Covid-19. The Colinton Station car park will be closed Mondays to Fridays for the 25 weeks of the works, but will be open for public use at the weekends.

During their first week, there is a one day planned closure (15 October) of one of the bridges on the Water of Leith Walkway to allow assembly of a temporary bridge for the construction vehicles to use.

For information, see the Scottish Water website:
Scottish Water - Kingsknowe CSO

Update 01-Aug-2020
Scottish Water intend to start their works in Colinton Dell from late July. They have received planning consent for their use of ground in the former Colinton Station area for their works compound. Works were planned to have started ealier, but were suspended at the end of March due to Covid-19.

Scottish Water is planning an estimated 30 weeks of works in Colinton Dell, making improvements to their sewer network, beginning in late February 2020.

They have made a planning application to make a works compound in the former Colinton Station area, including the car park normally accessed from Gillespie Road, and the level ground close to that. It also involves vehicular access along the Water of Leith Walkway from there, including Colinton Tunnel, to their sewer site a distance downstream in the Kingsknowe area. The plan is for public access to the car park to be made available at weekends during the works.

There is an information event, a drop-in session in Colinton Library on Monday 17 February between 4pm and 7pm, by the Scottish Water project team.

For information about the works, see the following Scottish Water webpage:
https://www.scottishwater.co.uk/en/About-Us/News-and-Views/100220-Water-of-Leith-Investment

Similar works to the sewers will be taking place elsewhere, including in the Juniper Green and Currie areas which is expected to involve temporary closures of sections of the Water of Leith Walkway in these localities.