On drainage basin of the stream Brut it was assummed and later even locals confirmed that some of culvert pipes are under measured. Because of this, it was made detailed analysis of runoff regime and throughput capacities for each stream object. It was summed up that three culvert pipes have to small capacities and that maintenance of the stream is really bad. Than it was calculated what would be satisfactory dimensions for pipes with risk factor lower than 50-years waters, which is in the same time even acceptable risk rate in this Thesis. It showed out that two culvert pipes are flooding becauseor runoff from new highway. Next problem is maintenance of stream and supporting objects. Because of this, on some objects the water is escaping from stream and than makes flood and erosion risk for mans objects and activities downstream. However, on the other arm of the stream we have example of good practice. More than 40 years ago, while there were building a new road, they built even big system of seven water barriers. Most of those can withstand even 500-years waters and today they still perfectly do their job of consolidating slopes and lowering stream impact force. Essence found that is better prevent with right design and maintenance, than waiting on post-flood rehabilitation.