K Kali Kumpa is one of the rivers located in Cibinong, Bogor Regency which crosses the Pakansari area and the Regional Government (Local Government). According to reports from BPBD (Regional Disaster Management Agency) and local residents, recently the Kumpa River has experienced flooding due to the river's cross section being unable to accommodate the resulting discharge or overtopping. The purpose of this study was to evaluate the capacity of the existing river of Kali Kumpa against the planned discharge of 10year and 20year return periods, to plan the handling of overtopping points, and to calibrate the HEC-RAS model to the measurement data of Kali Kumpa. With the analysis method of frequency distribution Log Pearson III, the design discharge is 3.52 m3/s for Q10 and 3.79 m3/s for Q20. By calculating the calibration discharge, the Q-calibration result is 0.65 m3/s and the results from the calibration of the HEC-RAS model with measurement data are not significantly different with a maximum height difference of 0,35 m and an average difference of 0,11 m. Using the HEC-RAS application program with steady flow, 7 critical overtopping points were obtained at the Kali Kumpa with a maximum overtopping height of 0.84 m for a 10year return period and 0.88 m for a 20year return period. The handling effort is normalization by widening the river body by 1 m and adding a 1 m embankment. With these handling efforts, it can be concluded that the flow rate in the Kumpa River can be handled.