An architectural-historical study and an aesthetic requirements programme have been formulated for the restoration and renovation of the barrage ensemble of the Nederrijn and Lek rivers on behalf of the Netherlands Ministry of Infrastructure and Water Management. It was important for the heritage value of the ensemble to be retained and for new additions to fit in appropriately with the existing elements during the necessary renovations. Sjoekie de Bijll Nachenius was involved in the renovation process on behalf of BiermanHenket as spatial quality adviser to the Ministry.
The barrage ensemble consists of three near-identical barrages in the Nederrijn and Lek rivers between Arnhem and Vianen. These barrages are an important element of Dutch waterways management. The barrages enable the water levels in the Nederrijn and Lek to be controlled, which in turn means control of navigability and the discharge of water, ice and sediment. In addition, this management feature ensures fresh water supply in the IJsselmeer via the IJssel and sufficient depth of the Waal, which is of economic importance, the Waal being the busiest river in all of Europe.