Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationActivity.cs
===================================================================
diff -u -rab2f7996c204ca193fb728b3983b75a97c92c7b6 -r0f61433cb005ad04374dbe99e0a553b967afe64d
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationActivity.cs	(.../GrassCoverErosionInwardsCalculationActivity.cs)	(revision ab2f7996c204ca193fb728b3983b75a97c92c7b6)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationActivity.cs	(.../GrassCoverErosionInwardsCalculationActivity.cs)	(revision 0f61433cb005ad04374dbe99e0a553b967afe64d)
@@ -33,7 +33,6 @@
     internal class GrassCoverErosionInwardsCalculationActivity : CalculatableActivity
     {
         private readonly GrassCoverErosionInwardsCalculation calculation;
-        private readonly string hydraulicBoundaryDatabaseFilePath;
         private readonly GrassCoverErosionInwardsFailureMechanism failureMechanism;
         private readonly IAssessmentSection assessmentSection;
         private readonly GrassCoverErosionInwardsCalculationService calculationService;
@@ -42,21 +41,14 @@
         /// Creates a new instance of <see cref="GrassCoverErosionInwardsCalculationActivity"/>.
         /// </summary>
         /// <param name="calculation">The height structures data used for the calculation.</param>
-        /// <param name="hydraulicBoundaryDatabaseFilePath">The path which points to the hydraulic boundary database file.</param>
         /// <param name="failureMechanism">The failure mechanism the calculation belongs to.</param>
         /// <param name="assessmentSection">The assessment section the calculation belongs to.</param>
         /// <exception cref="ArgumentNullException">Thrown when any input argument is <c>null</c>.</exception>
         public GrassCoverErosionInwardsCalculationActivity(GrassCoverErosionInwardsCalculation calculation,
-                                                           string hydraulicBoundaryDatabaseFilePath,
                                                            GrassCoverErosionInwardsFailureMechanism failureMechanism,
                                                            IAssessmentSection assessmentSection)
             : base(calculation)
         {
-            if (hydraulicBoundaryDatabaseFilePath == null)
-            {
-                throw new ArgumentNullException(nameof(hydraulicBoundaryDatabaseFilePath));
-            }
-
             if (failureMechanism == null)
             {
                 throw new ArgumentNullException(nameof(failureMechanism));
@@ -68,7 +60,6 @@
             }
 
             this.calculation = calculation;
-            this.hydraulicBoundaryDatabaseFilePath = hydraulicBoundaryDatabaseFilePath;
             this.failureMechanism = failureMechanism;
             this.assessmentSection = assessmentSection;
 
@@ -94,7 +85,7 @@
                 assessmentSection,
                 failureMechanism.GeneralInput,
                 failureMechanism.Contribution,
-                hydraulicBoundaryDatabaseFilePath);
+                assessmentSection.HydraulicBoundaryDatabase.FilePath);
         }
 
         protected override void OnCancel()
Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationActivityFactory.cs
===================================================================
diff -u -rd088de29dabf3bcca2e68c766745ef6b5fc62050 -r0f61433cb005ad04374dbe99e0a553b967afe64d
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationActivityFactory.cs	(.../GrassCoverErosionInwardsCalculationActivityFactory.cs)	(revision d088de29dabf3bcca2e68c766745ef6b5fc62050)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationActivityFactory.cs	(.../GrassCoverErosionInwardsCalculationActivityFactory.cs)	(revision 0f61433cb005ad04374dbe99e0a553b967afe64d)
@@ -124,7 +124,6 @@
             }
 
             return new GrassCoverErosionInwardsCalculationActivity(calculation,
-                                                                   assessmentSection.HydraulicBoundaryDatabase.FilePath,
                                                                    failureMechanism,
                                                                    assessmentSection);
         }
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Service.Test/GrassCoverErosionInwardsCalculationActivityTest.cs
===================================================================
diff -u -ra494bde768f1b989d31bff6a801a1816d6f9692e -r0f61433cb005ad04374dbe99e0a553b967afe64d
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Service.Test/GrassCoverErosionInwardsCalculationActivityTest.cs	(.../GrassCoverErosionInwardsCalculationActivityTest.cs)	(revision a494bde768f1b989d31bff6a801a1816d6f9692e)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Service.Test/GrassCoverErosionInwardsCalculationActivityTest.cs	(.../GrassCoverErosionInwardsCalculationActivityTest.cs)	(revision 0f61433cb005ad04374dbe99e0a553b967afe64d)
@@ -44,7 +44,7 @@
             var calculation = new GrassCoverErosionInwardsCalculation();
 
             // Call
-            var activity = new GrassCoverErosionInwardsCalculationActivity(calculation, "", failureMechanism, assessmentSection);
+            var activity = new GrassCoverErosionInwardsCalculationActivity(calculation, failureMechanism, assessmentSection);
 
             // Assert
             Assert.IsInstanceOf<CalculatableActivity>(activity);
@@ -56,26 +56,6 @@
         }
 
         [Test]
-        public void ParameteredConstructor_HydraulicBoundaryDatabaseFilePathNull_ThrowsArgumentNullException()
-        {
-            // Setup
-            var mocks = new MockRepository();
-            var assessmentSection = mocks.Stub<IAssessmentSection>();
-            mocks.ReplayAll();
-
-            var failureMechanism = new GrassCoverErosionInwardsFailureMechanism();
-            var calculation = new GrassCoverErosionInwardsCalculation();
-
-            // Call
-            TestDelegate call = () => new GrassCoverErosionInwardsCalculationActivity(calculation, null, failureMechanism, assessmentSection);
-
-            // Assert
-            var exception = Assert.Throws<ArgumentNullException>(call);
-            Assert.AreEqual("hydraulicBoundaryDatabaseFilePath", exception.ParamName);
-            mocks.VerifyAll();
-        }
-
-        [Test]
         public void ParameteredConstructor_FailureMechanismNull_ThrowsArgumentNullException()
         {
             // Setup
@@ -86,7 +66,7 @@
             var calculation = new GrassCoverErosionInwardsCalculation();
 
             // Call
-            TestDelegate call = () => new GrassCoverErosionInwardsCalculationActivity(calculation, "", null, assessmentSection);
+            TestDelegate call = () => new GrassCoverErosionInwardsCalculationActivity(calculation, null, assessmentSection);
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(call);
@@ -102,7 +82,7 @@
             var calculation = new GrassCoverErosionInwardsCalculation();
 
             // Call
-            TestDelegate call = () => new GrassCoverErosionInwardsCalculationActivity(calculation, "", failureMechanism, null);
+            TestDelegate call = () => new GrassCoverErosionInwardsCalculationActivity(calculation, failureMechanism, null);
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(call);