[Deadparrot]

One more bridge to the west or east over the Nieuwe Maas is unknown to me. The railway and road bridge both run northwest-southeast over the island. It could be that you took the Maastunnel that was being built in 1940 for a bridge. They used the ventilation building on the northern bank as artillery observation point for shelling the airfield Waalhaven. Need any info? Got books about bridges.

By the way, the germans used the parking space of the football stadium Feijenoord as auxillary airstrip. The Aviation department sent Fokker reconnaisance biplanes to bomb both fields.

Edit - Nieuwe Maas in stead of Oude Maas.