The Zandkreek Dam was part of the Three-Islands Plan, which aimed to connect Walcheren with Noord- and Zuid-Beveland. Variants of this plan existed long before the 1953 North Sea flood disaster. After the disaster, the Three-Islands Plan was revived in the fourth advisory report of the Delta Committee. The goal was to shorten the coastline, making it easier to protect than the many kilometers of dikes, and also cheaper than raising dikes everywhere. As a bonus, roads over the dams would better connect the islands.
The Zandkreek Dam was constructed first, not directly on the North Sea, but as a necessary preparation for the Lake Veere Dam and the (then-planned) closure of the Eastern Scheldt. If either of those two had been built first, the tidal currents would likely have become so strong that they would erode the seabed. A moving, deeper seabed would have posed a problem for closing off the next estuary. Therefore, the Zandkreek Dam was built precisely at the location where the tidal currents from the Eastern Scheldt and the Veerse Gat met: the "wantij" (the area where the currents converge). Additionally, the relatively short dam served as a good way to gain experience for the larger projects to come.
With the closure of the Veerse Gat (thus creating the Lake Veere), the fishing fleets from Veere and Arnemuiden moved to the sea harbor at Colijnsplaat. A lock was included in the Zandkreek Dam to allow maritime traffic through the Canal through Walcheren and recreational boating on the Lake Veere.