Turlough Hill – Upper Reservoir: condition of the lining after 30 years

Due to the development of cracks and increasing leakage, concerns have arisen in recent years regarding the integrity of the asphaltic concrete lining in the sloping sides of the reservoir at Turlough Hill Pumped Storage Scheme. Prior to April 1995 the leakage was negligible but subsequently started to increase and this was the starting point for the current phase of investigations into the integrity of the lining. This paper gives details of the lining and outlines it's operating history. The various investigations, repairs, possible causes of cracking and remedial options considered are briefly summarised. The policy adopted to deal with the problem and the success of this policy to date is also outlined.

• INTRODUCTION

• INVESTIGATIONS & REPAIRS OF CRACKS

• CONDITION ASSESSMENT OF LINING

• REVIEW OF OPTIONS

• POLICY ADOPTED BY ESB

• CURRENT STATUS

• CONCLUSIONS

• ACKNOWLEDGEMENTS

• REFERENCES