Many diversion head-works for irrigation have been designed and constructed in the precedingrnyears. Some of them are performing successfully, but it has been observed in various reports thatrnsome of the schemes have failed to serve the purpose for which they are designed. Therefore it isrnimportant to deal with the performance assessment of diversion head works implemented forrnirrigation.rnA case study on Fantale diversion head-work carried out for this research work and attempt isrnmade to understand the hydraulic and structural problems encountered. This serve for differentrnpurposes such as for construction of new diversion structure (either as replacement for existingrnstructures, or as an entirely new structure), rehabilitation of existing structures (from minorrnrepairs to complete re-engineering either to maintain existing function, or to meet newrnrequirements) decommissioning of the structures.rnSurveying data at the head-work cross section and other supporting dataâ€™s were used to estimaternthe amount of sediment deposition. The analyses of the dataâ€™s shows that there is a clearrnreduction of flow area or opening size at the canal head regulator.rnThe main factors that caused below performance of Fantale diversion head-work arernsedimentation and formation of shoals upstream of both under-sluice and weir component,rnselection of diversion structure type, malfunctioning of gates, seepage under the weir and thernunder-sluice, reduced opening size at the canal head regulator, failure to flush sedimentrnregularly, entry of silt in to the canal.rnKey words: Analysis, Diversion, Downstream, Gates, Head work, Regulator, Scour, Seepage,rnSilt, Stability, Upstream, Under-sluice, Weir.