Mains Rehabilitation - the Lackington Way

Severn Trent Water has a water mains distribution network of circa 40,000 kms in length. A major mains renovation programme has been underway since 1989 with over 7,500 kms of mains being rehabilitated. The triggers for this work were water quality, appearance, taste, structural condition, leakage and maintenance costs. 

This paper is in three parts. In the first the effective identification of problems using conditions indicators is explored. In the second, methods of collecting and analysing network performance data are described. The third section looks at how labour, material and technique selection interact to determine the optimum solution for any particular identified problems.