Causeways also known as Rapta are the raised surface generally made of concrete laid on river bed across it, where river crosses the roads or highways. Whenever water flows over the causeway, it scours the upstream as well as downstream edges of the causeways leading to its structural failure. In this paper an attempt has been made to carry out extensive experimental studies on scour around the edges of the causeways on its upstream as well as downstream sides. Experiments have been carried out in 20m long, 0.74m wide and 0.60m deep laboratory flume. Models of Rapta were constructed by concrete blocks in 0.20m width with overall depth changing from 0.06m to 0.23m. A constant discharge of 1l/s was passed over the causeway maintaining a constant velocity of 0.135m/s and Froude No. as 0.379. Data of scour depths have been collected on predetermined nodal points along the edges of the causeways with time varying from one hour to 24 hours. The results of scour are presented in the form of graphs. Also, methods have been suggested for its mitigation.