The present study aimed to use the IHA to assess the potential impacts of dam construction on five major categories of hydrologic parameters: water temperature, sediment transport, dissolved oxygen, pH, and conductivity. Field measurements were taken at three sites upstream and downstream of a proposed dam site on the Little River in Georgia, USA. Results indicated that there was no significant difference between pre- and post-construction values for most parameters, with the exception of pH and conductivity. It was concluded that the IHA can be used as a valuable tool for predicting potential impacts of dams on downstream biotic communities. However, more research is needed to refine and validate the IHA methodology.