The Maeslant Barrier consists of two hollow semi-circular gates attached by means of steel arms to a pivotal point on both banks. One of the advantages of the design in relation to other designs is that of ease of maintenance. In normal coditions the doors are positioned in a dry dock situated in the abutements. More information of this barrier can be obtained from the following websites:

maeslant-closure    maeslant-sink to riverfloor

The keringhuis keringhuiswebsite

The Delta works Delta works website