The objective of this study was evaluation the performance of different surface inlet designs. The inlets tested where the 6'' Hickenbottom, AgriDrain, and two Ag-Solutions designs. The 8'' Hickenbottom, AgriDrain and Ag-Solution inlets were also tested. The inlets were evaluated on the basis of comparing their performance of ideal uninhibited draining capacity, draining capacity with debris present, and the amount of sediment allowed into the drainage tile. The 6'' Ag-Solutions and 8'' Ag-Solutions have the best draining capacity in both ideal conditions and with field debris present. At a ponding depth of 15 cm without debris the 6'' Ag-Solutions drains at a flow rate of 25,000 cm 3/s and the 8'' Ag-Solutions Drains at a flow rate of 20353.545 cm3/s. The Hickenbottom inlet has the least reduction of drainage capacity due to field debris inhibiting the flow of water through the inlet. This holds true for both the 6'' and 8'' designs. Overall, none of the inlet designs is better suited than the other to inhibit sediment flow into the tile lines.