Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Create/MacroStabilityInwards/MacroStabilityInwardsCalculationScenarioCreateExtensions.cs
===================================================================
diff -u -r06e3624f72482462ebb7e4ee29d1a8173005e59d -r3a8f6ba90c3d906662b38b9420858e48665ce799
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Create/MacroStabilityInwards/MacroStabilityInwardsCalculationScenarioCreateExtensions.cs	(.../MacroStabilityInwardsCalculationScenarioCreateExtensions.cs)	(revision 06e3624f72482462ebb7e4ee29d1a8173005e59d)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Create/MacroStabilityInwards/MacroStabilityInwardsCalculationScenarioCreateExtensions.cs	(.../MacroStabilityInwardsCalculationScenarioCreateExtensions.cs)	(revision 3a8f6ba90c3d906662b38b9420858e48665ce799)
@@ -118,6 +118,8 @@
             SetGridParametersToEntity(entity, inputParameters.LeftGrid, inputParameters.RightGrid);
 
             entity.CreateZones = Convert.ToByte(inputParameters.CreateZones);
+            entity.ZoneBoundaryLeft = inputParameters.ZoneBoundaryLeft.ToNaNAsNull();
+            entity.ZoneBoundaryRight = inputParameters.ZoneBoundaryRight.ToNaNAsNull();
         }
 
         private static void SetGridParametersToEntity(MacroStabilityInwardsCalculationEntity entity,
Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Read/MacroStabilityInwards/MacroStabilityInwardsCalculationEntityReadExtensions.cs
===================================================================
diff -u -r06e3624f72482462ebb7e4ee29d1a8173005e59d -r3a8f6ba90c3d906662b38b9420858e48665ce799
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Read/MacroStabilityInwards/MacroStabilityInwardsCalculationEntityReadExtensions.cs	(.../MacroStabilityInwardsCalculationEntityReadExtensions.cs)	(revision 06e3624f72482462ebb7e4ee29d1a8173005e59d)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Read/MacroStabilityInwards/MacroStabilityInwardsCalculationEntityReadExtensions.cs	(.../MacroStabilityInwardsCalculationEntityReadExtensions.cs)	(revision 3a8f6ba90c3d906662b38b9420858e48665ce799)
@@ -129,6 +129,8 @@
             SetGridparametersToInput(inputParameters.LeftGrid, inputParameters.RightGrid, entity);
 
             inputParameters.CreateZones = Convert.ToBoolean(entity.CreateZones);
+            inputParameters.ZoneBoundaryLeft = (RoundedDouble) entity.ZoneBoundaryLeft.ToNullAsNaN();
+            inputParameters.ZoneBoundaryRight = (RoundedDouble) entity.ZoneBoundaryRight.ToNullAsNaN();
         }
 
         private static void SetSurfaceLineToInput(MacroStabilityInwardsInput inputParameters,
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/MacroStabilityInwards/MacroStabilityInwardsCalculationScenarioCreateExtensionsTest.cs
===================================================================
diff -u -r10e060be0b77c159b3e99a7200e43c4326b17642 -r3a8f6ba90c3d906662b38b9420858e48665ce799
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/MacroStabilityInwards/MacroStabilityInwardsCalculationScenarioCreateExtensionsTest.cs	(.../MacroStabilityInwardsCalculationScenarioCreateExtensionsTest.cs)	(revision 10e060be0b77c159b3e99a7200e43c4326b17642)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/MacroStabilityInwards/MacroStabilityInwardsCalculationScenarioCreateExtensionsTest.cs	(.../MacroStabilityInwardsCalculationScenarioCreateExtensionsTest.cs)	(revision 3a8f6ba90c3d906662b38b9420858e48665ce799)
@@ -109,7 +109,10 @@
                         XRight = RoundedDouble.NaN,
                         ZTop = RoundedDouble.NaN,
                         ZBottom = RoundedDouble.NaN
-                    }
+                    },
+                    CreateZones = true,
+                    ZoneBoundaryLeft = RoundedDouble.NaN,
+                    ZoneBoundaryRight = RoundedDouble.NaN
                 }
             };
             var registry = new PersistenceRegistry();
@@ -164,6 +167,9 @@
             Assert.IsNull(entity.RightGridXRight);
             Assert.IsNull(entity.RightGridZTop);
             Assert.IsNull(entity.RightGridZBottom);
+
+            Assert.IsNull(entity.ZoneBoundaryLeft);
+            Assert.IsNull(entity.ZoneBoundaryRight);
         }
 
         [Test]
@@ -239,7 +245,9 @@
                         ZBottom = random.NextRoundedDouble(0.0, 1.0),
                         NumberOfVerticalPoints = random.Next(1, 100)
                     },
-                    CreateZones = random.NextBoolean()
+                    CreateZones = random.NextBoolean(),
+                    ZoneBoundaryLeft = random.NextRoundedDouble(2, 5),
+                    ZoneBoundaryRight = random.NextRoundedDouble(6, 10)
                 }
             };
 
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/MacroStabilityInwards/MacroStabilityInwardsCalculationEntityReadExtensionsTest.cs
===================================================================
diff -u -r7b2237f0bdfa03edcf158d24294c4433266ca91f -r3a8f6ba90c3d906662b38b9420858e48665ce799
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/MacroStabilityInwards/MacroStabilityInwardsCalculationEntityReadExtensionsTest.cs	(.../MacroStabilityInwardsCalculationEntityReadExtensionsTest.cs)	(revision 7b2237f0bdfa03edcf158d24294c4433266ca91f)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/MacroStabilityInwards/MacroStabilityInwardsCalculationEntityReadExtensionsTest.cs	(.../MacroStabilityInwardsCalculationEntityReadExtensionsTest.cs)	(revision 3a8f6ba90c3d906662b38b9420858e48665ce799)
@@ -115,7 +115,9 @@
                 RightGridZTop = random.GetFromRange(2.0, 3.0),
                 RightGridZBottom = random.GetFromRange(0.0, 1.0),
                 RightGridNrOfVerticalPoints = random.Next(1, 100),
-                CreateZones = Convert.ToByte(random.NextBoolean())
+                CreateZones = Convert.ToByte(random.NextBoolean()),
+                ZoneBoundaryLeft = random.Next(2, 5),
+                ZoneBoundaryRight = random.Next(6, 10)
             };
 
             var collector = new ReadConversionCollector();
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/MacroStabilityInwards/MacroStabilityInwardsCalculationEntityTestHelper.cs
===================================================================
diff -u -r06e3624f72482462ebb7e4ee29d1a8173005e59d -r3a8f6ba90c3d906662b38b9420858e48665ce799
--- Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/MacroStabilityInwards/MacroStabilityInwardsCalculationEntityTestHelper.cs	(.../MacroStabilityInwardsCalculationEntityTestHelper.cs)	(revision 06e3624f72482462ebb7e4ee29d1a8173005e59d)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/MacroStabilityInwards/MacroStabilityInwardsCalculationEntityTestHelper.cs	(.../MacroStabilityInwardsCalculationEntityTestHelper.cs)	(revision 3a8f6ba90c3d906662b38b9420858e48665ce799)
@@ -106,6 +106,8 @@
             AssertGridInputs(input.LeftGrid, input.RightGrid, entity);
 
             Assert.AreEqual(Convert.ToByte(input.CreateZones), entity.CreateZones);
+            AssertAreEqual(input.ZoneBoundaryLeft, entity.ZoneBoundaryLeft);
+            AssertAreEqual(input.ZoneBoundaryRight, entity.ZoneBoundaryRight);
         }
 
         private static void AssertGridInputs(MacroStabilityInwardsGrid leftGrid,
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/RingtoetsProjectTestHelper.cs
===================================================================
diff -u -rae47ec1ec171e74d0eedf64cf0bcda742bc5f289 -r3a8f6ba90c3d906662b38b9420858e48665ce799
--- Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/RingtoetsProjectTestHelper.cs	(.../RingtoetsProjectTestHelper.cs)	(revision ae47ec1ec171e74d0eedf64cf0bcda742bc5f289)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/RingtoetsProjectTestHelper.cs	(.../RingtoetsProjectTestHelper.cs)	(revision 3a8f6ba90c3d906662b38b9420858e48665ce799)
@@ -1416,7 +1416,9 @@
                                 ZBottom = (RoundedDouble) 3.4,
                                 NumberOfVerticalPoints = 6
                             },
-                            CreateZones = false
+                            CreateZones = false,
+                            ZoneBoundaryLeft = (RoundedDouble) 10,
+                            ZoneBoundaryRight = (RoundedDouble) 12
                         },
                         Output = MacroStabilityInwardsOutputTestFactory.CreateOutput(),
                         SemiProbabilisticOutput = new MacroStabilityInwardsSemiProbabilisticOutput(1, 0.7, 8.8, 0.9,
@@ -1497,7 +1499,9 @@
                                 ZBottom = (RoundedDouble) 3.4,
                                 NumberOfVerticalPoints = 6
                             },
-                            CreateZones = false
+                            CreateZones = false,
+                            ZoneBoundaryLeft = (RoundedDouble) 5.4,
+                            ZoneBoundaryRight = (RoundedDouble) 6.5
                         },
                         Output = MacroStabilityInwardsOutputTestFactory.CreateOutput(),
                         SemiProbabilisticOutput = MacroStabilityInwardsSemiProbabilisticOutputTestFactory.CreateOutput()