The work in the Buncrana Road area will commence on Monday, 12 October, and is expected to last for approximately 10 weeks.
NI Water said the work includes Closed Circuit Television (CCTV) surveys and cleaning of the existing sewers.
The work is being carried out to assess the condition of the existing sewerage network. Once complete, the results will help to develop a programme of sewer repair and improvement works required for the area.
The majority of the work will take place on the Buncrana Road, and around the junctions of adjacent streets. Initially daytime works will be undertaken for one week, and will be located around the McArtney Park/ Collon Terrace and Pennyburn Industrial Estate areas. Following this, work will continue on the Buncrana Road at the Pennyburn roundabout on Monday 19th October, with work progressing out of the City.
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In a statement NI Water said: "Due to the location of the works on Buncrana Road, and in order to minimise disruption as far as possible, work will mostly take place during the night-time / early morning hours and working hours will generally be between 7pm and 7am. We will do everything possible to minimise disruption as far as possible during these times.
"To allow the works to be undertaken safely, some temporary lane closures will be in place during this time but we will endeavour to maintain two-way traffic as much as possible. All traffic management will be removed from the Buncrana Road during the day.
"Our contractor McAllister Group will liaise with any affected businesses/properties. We appreciate that this work is disruptive and would like to thank the public in advance for their patience as we complete these essential improvement works."
