Abstract: The invention relates to an excavation installation, comprising excavation means (1,2) in which more than one excavation means (1,2) is positioned offset next to another in a row (34,35) of excavation means (1,2). In use the excavation installation may excavate a horizontal bottom of water (102) in a direction that is perpendicular to the direction of the rows (34,35) of excavation means (1,2). The excavation means (1,2) are connected to a rigid construction, in which the rigid construction (3) is positioned vertically above the excavation means (1,2). The rigid construction (3) is resiliency connected to a bridge (5) that is positioned vertically above the rigid construction (3) and connected by means of actuators (7).