Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Application.Ringtoets.Storage.csproj
===================================================================
diff -u -r790cfed116a6bd0d34eae8b66dae8dfc66774c86 -re73044fe9a7ef3d834a019841d04307fa7d2ec22
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Application.Ringtoets.Storage.csproj	(.../Application.Ringtoets.Storage.csproj)	(revision 790cfed116a6bd0d34eae8b66dae8dfc66774c86)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Application.Ringtoets.Storage.csproj	(.../Application.Ringtoets.Storage.csproj)	(revision e73044fe9a7ef3d834a019841d04307fa7d2ec22)
@@ -44,6 +44,7 @@
     <Compile Include="Create\GrassCoverErosionInwards\OvertoppingRateOutputCreateExtensions.cs" />
     <Compile Include="Create\GrassCoverErosionOutwards\GrassCoverErosionOutwardsWaveConditionsCalculationCreateExtensions.cs" />
     <Compile Include="Create\HeightStructures\HeightStructureCreateExtensions.cs" />
+    <Compile Include="Create\HydraulicBoundaryLocationCalculationCollectionCreateExtensions.cs" />
     <Compile Include="Create\HydraulicBoundaryLocationCalculationCreateExtensions.cs" />
     <Compile Include="Create\HydraulicBoundaryLocationOutputCreateExtensions.cs" />
     <Compile Include="Create\IllustrationPoints\IllustrationPointNodeCreateExtensions.cs" />
Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Create/HydraulicBoundaryLocationCalculationCollectionCreateExtensions.cs
===================================================================
diff -u
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Create/HydraulicBoundaryLocationCalculationCollectionCreateExtensions.cs	(revision 0)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Create/HydraulicBoundaryLocationCalculationCollectionCreateExtensions.cs	(revision e73044fe9a7ef3d834a019841d04307fa7d2ec22)
@@ -0,0 +1,67 @@
+// Copyright (C) Stichting Deltares 2017. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using Application.Ringtoets.Storage.DbContext;
+using Ringtoets.Common.Data.Hydraulics;
+
+namespace Application.Ringtoets.Storage.Create
+{
+    /// <summary>
+    /// Extension methods for collections of <see cref="HydraulicBoundaryLocationCalculation"/> related to creating a 
+    /// <see cref="HydraulicLocationCalculationCollectionEntity"/>.
+    /// </summary>
+    internal static class HydraulicBoundaryLocationCalculationCollectionCreateExtensions
+    {
+        /// <summary>
+        /// Creates a <see cref="HydraulicLocationCalculationCollectionEntity"/> based on the information
+        /// of the <paramref name="calculations"/>.
+        /// </summary>
+        /// <param name="calculations">The <see cref="IEnumerable{T}"/> of <see cref="HydraulicBoundaryLocationCalculation"/>
+        /// to create a database entity for.</param>
+        /// <param name="registry">The object keeping track of create operations.</param>
+        /// <returns>A new <see cref="HydraulicLocationCalculationCollectionEntity"/>.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
+        internal static HydraulicLocationCalculationCollectionEntity Create(this IEnumerable<HydraulicBoundaryLocationCalculation> calculations,
+                                                                            PersistenceRegistry registry)
+        {
+            if (calculations == null)
+            {
+                throw new ArgumentNullException(nameof(calculations));
+            }
+
+            if (registry == null)
+            {
+                throw new ArgumentNullException(nameof(registry));
+            }
+
+            var collectionEntity = new HydraulicLocationCalculationCollectionEntity();
+
+            foreach (HydraulicBoundaryLocationCalculation calculation in calculations)
+            {
+                collectionEntity.HydraulicLocationCalculationEntities.Add(calculation.Create(registry));
+            }
+
+            return collectionEntity;
+        }
+    }
+}
\ No newline at end of file
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Application.Ringtoets.Storage.Test.csproj
===================================================================
diff -u -r790cfed116a6bd0d34eae8b66dae8dfc66774c86 -re73044fe9a7ef3d834a019841d04307fa7d2ec22
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Application.Ringtoets.Storage.Test.csproj	(.../Application.Ringtoets.Storage.Test.csproj)	(revision 790cfed116a6bd0d34eae8b66dae8dfc66774c86)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Application.Ringtoets.Storage.Test.csproj	(.../Application.Ringtoets.Storage.Test.csproj)	(revision e73044fe9a7ef3d834a019841d04307fa7d2ec22)
@@ -55,6 +55,7 @@
     <Compile Include="Create\GrassCoverErosionOutwards\GrassCoverErosionOutwardsWaveConditionsCalculationCreateExtensionsTest.cs" />
     <Compile Include="Create\GrassCoverErosionOutwards\GrassCoverErosionOutwardsWaveConditionsOutputCreateExtensionsTest.cs" />
     <Compile Include="Create\HeightStructures\HeightStructureCreateExtensionsTest.cs" />
+    <Compile Include="Create\HydraulicBoundaryLocationCalculationCollectionCreateExtensionsTest.cs" />
     <Compile Include="Create\HydraulicBoundaryLocationOutputCreateExtensionsTest.cs" />
     <Compile Include="Create\IllustrationPoints\IllustrationPointNodeCreateExtensionsTest.cs" />
     <Compile Include="Create\IllustrationPoints\GeneralResultCreateExtensionsTest.cs" />
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/HydraulicBoundaryLocationCalculationCollectionCreateExtensionsTest.cs
===================================================================
diff -u
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/HydraulicBoundaryLocationCalculationCollectionCreateExtensionsTest.cs	(revision 0)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/HydraulicBoundaryLocationCalculationCollectionCreateExtensionsTest.cs	(revision e73044fe9a7ef3d834a019841d04307fa7d2ec22)
@@ -0,0 +1,102 @@
+// Copyright (C) Stichting Deltares 2017. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Application.Ringtoets.Storage.Create;
+using Application.Ringtoets.Storage.DbContext;
+using Core.Common.Base;
+using Core.Common.TestUtil;
+using NUnit.Framework;
+using Ringtoets.Common.Data.Hydraulics;
+using Ringtoets.Common.Data.TestUtil;
+
+namespace Application.Ringtoets.Storage.Test.Create
+{
+    [TestFixture]
+    public class HydraulicBoundaryLocationCalculationCollectionCreateExtensionsTest
+    {
+        [Test]
+        public void Create_CalculationsNull_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate call = () => 
+                ((IEnumerable<HydraulicBoundaryLocationCalculation>) null).Create(new PersistenceRegistry());
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("calculations", exception.ParamName);
+        }
+
+        [Test]
+        public void Create_PersistenceRegistryNull_ThrowsArgumentNullException()
+        {
+            // Setup
+            IEnumerable<HydraulicBoundaryLocationCalculation> calculations =
+                Enumerable.Empty<HydraulicBoundaryLocationCalculation>();
+
+            // Call
+            TestDelegate call = () => calculations.Create(null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("registry", exception.ParamName);
+        }
+
+        [Test]
+        public void Create_WithValidCollection_ReturnsEntityWithExpectedResults()
+        {
+            // Setup
+            var random = new Random(21);
+
+            var hydraulicBoundaryLocation = new TestHydraulicBoundaryLocation();
+            var calculation = new HydraulicBoundaryLocationCalculation(hydraulicBoundaryLocation)
+            {
+                InputParameters =
+                {
+                    ShouldIllustrationPointsBeCalculated = random.NextBoolean()
+                }
+            };
+
+            var calculationCollection = new ObservableList<HydraulicBoundaryLocationCalculation>
+            {
+                calculation
+            };
+
+            var hydraulicLocationEntity = new HydraulicLocationEntity();
+            var registry = new PersistenceRegistry();
+            registry.Register(hydraulicLocationEntity, hydraulicBoundaryLocation);
+
+            // Call
+            HydraulicLocationCalculationCollectionEntity entity = calculationCollection.Create(registry);
+
+            // Assert
+            Assert.IsNotNull(entity);
+
+            HydraulicLocationCalculationEntity hydraulicLocationCalculationEntity = entity.HydraulicLocationCalculationEntities.Single();
+            Assert.AreSame(hydraulicLocationEntity, hydraulicLocationCalculationEntity.HydraulicLocationEntity);
+            Assert.AreEqual(Convert.ToByte(calculation.InputParameters.ShouldIllustrationPointsBeCalculated),
+                            hydraulicLocationCalculationEntity.ShouldIllustrationPointsBeCalculated);
+            CollectionAssert.IsEmpty(hydraulicLocationCalculationEntity.HydraulicLocationOutputEntities);
+        }
+    }
+}
\ No newline at end of file