Balgray Reservoir: Outlet Pipework Condition Assessment and Rehabilitation

This paper describes the investigations undertaken at Balgray Reservoir after concerns were raised regarding the condition of the heavily encrusted original cast iron pipework which dates from 1853.  Testing of the thickness and hardness of a section of the pipe as well as testing of the encrustation was used to determine the materials present.  The results of these investigations were used to determine the implications for the condition of the pipe and the resulting risks posed to the dam.  This informed the potential options for the required remediation works. Details are provided for the case study, the investigations and findings and potential options for encrustation removal.