Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Data/Input/HydraRingCalculationInput.cs
===================================================================
diff -u -r61f2445be56feb2180cb0990d8889164c17b79f0 -r5e6eacaf76f765ba77febee673e9e94895e46feb
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Data/Input/HydraRingCalculationInput.cs	(.../HydraRingCalculationInput.cs)	(revision 61f2445be56feb2180cb0990d8889164c17b79f0)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Data/Input/HydraRingCalculationInput.cs	(.../HydraRingCalculationInput.cs)	(revision 5e6eacaf76f765ba77febee673e9e94895e46feb)
@@ -28,13 +28,13 @@
     /// </summary>
     public abstract class HydraRingCalculationInput
     {
-        private readonly int hydraulicBoundaryLocationId;
+        private readonly long hydraulicBoundaryLocationId;
 
         /// <summary>
         /// Creates a new instance of the <see cref="HydraRingCalculationInput"/> class.
         /// </summary>
         /// <param name="hydraulicBoundaryLocationId">The id of the hydraulic station to use during the calculation.</param>
-        protected HydraRingCalculationInput(int hydraulicBoundaryLocationId)
+        protected HydraRingCalculationInput(long hydraulicBoundaryLocationId)
         {
             this.hydraulicBoundaryLocationId = hydraulicBoundaryLocationId;
         }
@@ -57,7 +57,7 @@
         /// <summary>
         /// Gets the id of the hydraulic station to use during the calculation.
         /// </summary>
-        public int HydraulicBoundaryLocationId
+        public long HydraulicBoundaryLocationId
         {
             get
             {