Lee Hydrometric Information This page provides hydrometric information on the Lee Scheme. Links are provided below to hourly hydrometric information that has been recorded by ESB for the Lee Scheme. × Close View full size image River Lee infographic (JPG | 3.12 MB) Levels in metres above Poolbeg ordnance datum (mOD) for the following locations along the Lee can be viewed here - Carrigadrohid Headrace Inniscarra Headrace Total flow in cubic metres per second (m3/sec) for the following locations can be viewed here - Total Carrigadrohid Flow Total Inniscarra Flow