As a case study was selected road bridge on road N°1 – National Rte 1 in Agadir in Morocco. The bridge is overpassing the river Qued Sous and is connecting the city centre with the area were international airport Al Massira. The bridge is administrated by The Laboratoire Public d’Essais et d’Etudes or “LPEE”, http://www.lpee.ma/en. The bridge consists of two bridges, from structural point of view consists of 4 and 3 precompresed concrete beams, simply supported. It is four span bridge. The visual inspection was made. Near the bridge, Hydrological station is placed, analysed the level of the river under the bridge.