Index: Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationActivity.cs
===================================================================
diff -u -rf95a4ded6035d61601445fa79685b9bb66a59cca -rce190360da30edf73fb464cc0fea1d9a795aa5d4
--- Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationActivity.cs	(.../DesignWaterLevelCalculationActivity.cs)	(revision f95a4ded6035d61601445fa79685b9bb66a59cca)
+++ Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationActivity.cs	(.../DesignWaterLevelCalculationActivity.cs)	(revision ce190360da30edf73fb464cc0fea1d9a795aa5d4)
@@ -36,7 +36,7 @@
     public class DesignWaterLevelCalculationActivity : HydraRingActivity<ReliabilityIndexCalculationOutput>
     {
         private static readonly ILog log = LogManager.GetLogger(typeof(DesignWaterLevelCalculationActivity));
-        private readonly IHydraulicBoundaryLocation hydraulicBoundaryLocation;
+        private readonly HydraulicBoundaryLocation hydraulicBoundaryLocation;
         private readonly double norm;
         private readonly string hydraulicBoundaryDatabaseFilePath;
         private readonly string ringId;
@@ -51,7 +51,11 @@
         /// <param name="norm">The norm to use during the calculation.</param>
         /// <param name="messageProvider">The provider of the messages to use during the calculation.</param>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="hydraulicBoundaryLocation"/> is <c>null</c>.</exception>
-        public DesignWaterLevelCalculationActivity(IHydraulicBoundaryLocation hydraulicBoundaryLocation, string hydraulicBoundaryDatabaseFilePath, string ringId, double norm, ICalculationMessageProvider messageProvider)
+        public DesignWaterLevelCalculationActivity(HydraulicBoundaryLocation hydraulicBoundaryLocation,
+                                                   string hydraulicBoundaryDatabaseFilePath,
+                                                   string ringId,
+                                                   double norm,
+                                                   ICalculationMessageProvider messageProvider)
         {
             if (hydraulicBoundaryLocation == null)
             {