1) The document describes an experiment to measure discharge over a broad crested weir. Water was passed through an inlet tank and discharge tank containing a broad crested weir, and the height and volume of water were measured over time. 2) Using the measured heights and volumes, the actual discharge was calculated and compared to the theoretical discharge calculated using a formula. The ratio of actual to theoretical discharge, known as the coefficient of discharge (Cd), was also determined. 3) The results showed that the Cd increased with increasing water height, and a logarithmic equation was developed to relate Cd to water height. The purpose was to determine discharge over a weir and compare to theory.