Northern Ireland Water has urged people to maker sure they stay safe around a new works site in Galliagh.
Work at Knockalla Pumping Station is expected to get under way next week and will continue for six months.
Both NI Water and its contractor, Geda Construction, will be working at Knockalla Pumping Station to replace the existing sewage pumping station to increase capacity and allow for future development in the area.
Grahame Millar, NI Water Project Sponsor, said: “Understandably, natural curiosity will draw children and young people to many of our sites. However, they are not playgrounds, and fooling around, at or near them can have dangerous consequences.
“Due to the nature of the works there will be large deep excavations on site, which may at times be partially filled with water; these will be fenced off securely.
“However, I would like draw your attention to the dangers these excavations may pose and would reiterate that all members of the public should stay away from our works for their own safety.
“Finally, I would also ask the local community to be vigilant against criminal damage and vandalism at NI Water sites. This damage can result in major delays to work schedules.”