Abstarct: Ogee spillways in the dams, rivers and water canals are use to control, transfer and measurement of water. Using Ogee spillways has increased duo to Hydraulic efficiency of the spillways. One of the main problems in irrigation lattice and in the event of flooding is entering rivers sedimentations into water canals, dams’ reservoirs and spillways upstream. In this research, our goal is laboratory investigate of effect that deposited sediments in the upstream of Ogee spillways, influence on the flow properties especially discharge coefficient. The research is done on two spillways with height of 10 and 16 CM. In order to model deposits, two types deposit of average diameter 1/7 and 3/2 MM were used and each of the sediments were built in three different heights of spillways upstream and the exchange of different discharge of depth, speed variations and the discharge coefficient measurements was measured. The research showed that in both the existence of varying sizes and sediment in varying heights, had no effect on the level of the water, but water speed increased due to increasing thickness of apron sediments. The discharge coefficient increased with increasing the flow rate so that the flow shifted to the critical and super critical, discharge coefficient increased. Also, by increasing the diameter, the discharge coefficient increased but by increasing sediments height, the discharge coefficient decreased and the discharge coefficient of heights and the same size of sediments decreased by increasing the height of spillways.