Pusporenggo Smalldam was built in Pusporenggo Village, Musuk District, Boyolali Regency. This reservoir was built to meet the needs of raw water Pusporenggo Village.The analyzes carried out include: analysis of watershed area, analysis of raw water needs and calculation of reservoir volume. From the analysis, watershed area of Pusporenggo Smalldam  is 0.339 km² with a river length of 1,281 km. Sediment volume: 15,083.61m³, infiltration volume: 26,101.97m³, evaporation volume: 1,436.55m, volume of raw water requirement: 104,407.88m³. From the volume calculation, it is known that the Pusporenggo Reservoir requires a reservoir volume of: 147.030.00m³. As for the initial design, the Pusporenggo Embung is planned with a spillway elevation of +501.50 and a volume of 234.532.60m³. It can be concluded that this reservoir can be used to fulfill water requirement for other areas.e