Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Calculators/Waternet/Output/WaternetCalculatorResult.cs
===================================================================
diff -u -rfc7a77a30ababe1d51f8fd39fa0fa599eb8011cd -r262e5ee967e56798894d0ea3167d110d0aea9684
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Calculators/Waternet/Output/WaternetCalculatorResult.cs	(.../WaternetCalculatorResult.cs)	(revision fc7a77a30ababe1d51f8fd39fa0fa599eb8011cd)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Calculators/Waternet/Output/WaternetCalculatorResult.cs	(.../WaternetCalculatorResult.cs)	(revision 262e5ee967e56798894d0ea3167d110d0aea9684)
@@ -36,7 +36,7 @@
         /// <param name="waternetLines">The waternet lines.</param>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="phreaticLines"/>
         /// or <paramref name="waternetLines"/> is <c>null</c>.</exception>
-        internal WaternetCalculatorResult(WaternetPhreaticLineResult[] phreaticLines, WaternetLineResult[] waternetLines)
+        internal WaternetCalculatorResult(IEnumerable<WaternetPhreaticLineResult> phreaticLines, IEnumerable<WaternetLineResult> waternetLines)
         {
             if (phreaticLines == null)
             {
Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Creators/Output/WaternetCalculatorResultCreator.cs
===================================================================
diff -u
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Creators/Output/WaternetCalculatorResultCreator.cs	(revision 0)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Creators/Output/WaternetCalculatorResultCreator.cs	(revision 262e5ee967e56798894d0ea3167d110d0aea9684)
@@ -0,0 +1,81 @@
+// 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 Deltares.WTIStability.Data.Geo;
+using Ringtoets.MacroStabilityInwards.KernelWrapper.Calculators.Waternet.Output;
+using Point2D = Core.Common.Base.Geometry.Point2D;
+
+namespace Ringtoets.MacroStabilityInwards.KernelWrapper.Creators.Output
+{
+    /// <summary>
+    /// Creates <see cref="WaternetCalculatorResult"/> instances.
+    /// </summary>
+    internal static class WaternetCalculatorResultCreator
+    {
+        /// <summary>
+        /// Creates a <see cref="WaternetCalculatorResult"/> based on the information
+        /// given in the <paramref name="waternet"/>.
+        /// </summary>
+        /// <param name="waternet">The output to create the result for.</param>
+        /// <returns>A new <see cref="WaternetCalculatorResult"/> with information
+        /// taken from the <paramref name="waternet"/>.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="waternet"/>
+        /// is <c>null</c>.</exception>
+        public static WaternetCalculatorResult Create(Waternet waternet)
+        {
+            if (waternet == null)
+            {
+                throw new ArgumentNullException(nameof(waternet));
+            }
+
+            var phreaticLineLookup = new Dictionary<GeometryPointString, WaternetPhreaticLineResult>
+            {
+                {
+                    waternet.PhreaticLine, CreatePhreaticLine(waternet.PhreaticLine)
+                }
+            };
+            foreach (HeadLine headLine in waternet.HeadLineList)
+            {
+                phreaticLineLookup.Add(headLine, CreatePhreaticLine(headLine));
+            }
+
+            return new WaternetCalculatorResult(phreaticLineLookup.Values,
+                                                waternet.WaternetLineList.Select(wl => CreateWaternetLine(wl, phreaticLineLookup)));
+        }
+
+        private static WaternetLineResult CreateWaternetLine(WaternetLine waternetLine,
+                                                             IDictionary<GeometryPointString, WaternetPhreaticLineResult> phreaticLines)
+        {
+            return new WaternetLineResult(waternetLine.Name,
+                                          waternetLine.Points.Select(p => new Point2D(p.X, p.Z)).ToArray(),
+                                          phreaticLines[waternetLine.HeadLine]);
+        }
+
+        private static WaternetPhreaticLineResult CreatePhreaticLine(GeometryPointString phreaticLine)
+        {
+            return new WaternetPhreaticLineResult(phreaticLine.Name,
+                                                  phreaticLine.Points.Select(p => new Point2D(p.X, p.Z)).ToArray());
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Ringtoets.MacroStabilityInwards.KernelWrapper.csproj
===================================================================
diff -u -rfc7a77a30ababe1d51f8fd39fa0fa599eb8011cd -r262e5ee967e56798894d0ea3167d110d0aea9684
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Ringtoets.MacroStabilityInwards.KernelWrapper.csproj	(.../Ringtoets.MacroStabilityInwards.KernelWrapper.csproj)	(revision fc7a77a30ababe1d51f8fd39fa0fa599eb8011cd)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Ringtoets.MacroStabilityInwards.KernelWrapper.csproj	(.../Ringtoets.MacroStabilityInwards.KernelWrapper.csproj)	(revision 262e5ee967e56798894d0ea3167d110d0aea9684)
@@ -83,6 +83,7 @@
     <Compile Include="Calculators\UpliftVan\Output\UpliftVanSlidingCircleResult.cs" />
     <Compile Include="Calculators\UpliftVan\Output\UpliftVanSlidingCurveResult.cs" />
     <Compile Include="Creators\Input\WaternetStabilityLocationCreator.cs" />
+    <Compile Include="Creators\Output\WaternetCalculatorResultCreator.cs" />
     <Compile Include="Kernels\UpliftVan\UpliftVanKernelWrapperException.cs" />
     <Compile Include="Kernels\Waternet\IWaternetKernel.cs" />
     <Compile Include="Kernels\Waternet\WaternetKernelWrapper.cs" />
Index: Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.KernelWrapper.Test/Creators/Output/WaternetCalculatorResultCreatorTest.cs
===================================================================
diff -u
--- Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.KernelWrapper.Test/Creators/Output/WaternetCalculatorResultCreatorTest.cs	(revision 0)
+++ Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.KernelWrapper.Test/Creators/Output/WaternetCalculatorResultCreatorTest.cs	(revision 262e5ee967e56798894d0ea3167d110d0aea9684)
@@ -0,0 +1,136 @@
+// 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.Linq;
+using Deltares.WTIStability.Data.Geo;
+using NUnit.Framework;
+using Ringtoets.MacroStabilityInwards.KernelWrapper.Calculators.Waternet.Output;
+using Ringtoets.MacroStabilityInwards.KernelWrapper.Creators.Output;
+using Point2D = Core.Common.Base.Geometry.Point2D;
+
+namespace Ringtoets.MacroStabilityInwards.KernelWrapper.Test.Creators.Output
+{
+    [TestFixture]
+    public class WaternetCalculatorResultCreatorTest
+    {
+        [Test]
+        public void Create_WaternetNull_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate call = () => WaternetCalculatorResultCreator.Create(null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("waternet", exception.ParamName);
+        }
+
+        [Test]
+        public void Create_WaternetWithPhreaticLineAndHeadLinesAndWaternetLines_ReturnWaternetCalculatorResult()
+        {
+            // Setup
+            var headLine = new HeadLine
+            {
+                Name = "line 1",
+                Points =
+                {
+                    new GeometryPoint(0, 0),
+                    new GeometryPoint(1, 1)
+                }
+            };
+            var phreaticLine = new PhreaticLine
+            {
+                Name = "line 2",
+                Points =
+                {
+                    new GeometryPoint(2, 2),
+                    new GeometryPoint(3, 3)
+                }
+            };
+            var waternetLine = new WaternetLine
+            {
+                Name = "line 3",
+                Points =
+                {
+                    new GeometryPoint(4, 4),
+                    new GeometryPoint(5, 5)
+                },
+                HeadLine = headLine
+            };
+
+            var waternet = new Waternet
+            {
+                HeadLineList =
+                {
+                    headLine
+                },
+                PhreaticLine = phreaticLine,
+                WaternetLineList =
+                {
+                    waternetLine
+                }
+            };
+
+            // Call
+            WaternetCalculatorResult result = WaternetCalculatorResultCreator.Create(waternet);
+
+            // Assert
+            AssertPhreaticLines(new GeometryPointString[]
+            {
+                phreaticLine,
+                headLine
+            }, result.PhreaticLines.ToArray());
+
+            AssertWaternetLines(new[]
+            {
+                waternetLine
+            }, result.WaternetLines.ToArray());
+        }
+
+        private static void AssertWaternetLines(WaternetLine[] expectedLines, WaternetLineResult[] actualLines)
+        {
+            Assert.AreEqual(expectedLines.Length, actualLines.Length);
+
+            for (var i = 0; i < expectedLines.Length; i++)
+            {
+                Assert.AreEqual(expectedLines[i].Name, actualLines[i].Name);
+                CollectionAssert.AreEqual(expectedLines[i].Points.Select(p => new Point2D(p.X, p.Z)), actualLines[i].Geometry);
+                AssertPhreaticLine(expectedLines[i].HeadLine, actualLines[i].PhreaticLine);
+            }
+        }
+
+        private static void AssertPhreaticLines(GeometryPointString[] expectedLines, WaternetPhreaticLineResult[] actualLines)
+        {
+            Assert.AreEqual(expectedLines.Length, actualLines.Length);
+
+            for (var i = 0; i < expectedLines.Length; i++)
+            {
+                AssertPhreaticLine(expectedLines[i], actualLines[i]);
+            }
+        }
+
+        private static void AssertPhreaticLine(GeometryPointString expectedLine, WaternetPhreaticLineResult actualLine)
+        {
+            Assert.AreEqual(expectedLine.Name, actualLine.Name);
+            CollectionAssert.AreEqual(expectedLine.Points.Select(p => new Point2D(p.X, p.Z)), actualLine.Geometry);
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.KernelWrapper.Test/Ringtoets.MacroStabilityInwards.KernelWrapper.Test.csproj
===================================================================
diff -u -rfc7a77a30ababe1d51f8fd39fa0fa599eb8011cd -r262e5ee967e56798894d0ea3167d110d0aea9684
--- Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.KernelWrapper.Test/Ringtoets.MacroStabilityInwards.KernelWrapper.Test.csproj	(.../Ringtoets.MacroStabilityInwards.KernelWrapper.Test.csproj)	(revision fc7a77a30ababe1d51f8fd39fa0fa599eb8011cd)
+++ Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.KernelWrapper.Test/Ringtoets.MacroStabilityInwards.KernelWrapper.Test.csproj	(.../Ringtoets.MacroStabilityInwards.KernelWrapper.Test.csproj)	(revision 262e5ee967e56798894d0ea3167d110d0aea9684)
@@ -101,6 +101,7 @@
     <Compile Include="Calculators\UpliftVan\Output\UpliftVanSlidingCurveResultTest.cs" />
     <Compile Include="Creators\Output\UpliftVanCalculationGridResultCreatorTest.cs" />
     <Compile Include="Calculators\UpliftVan\Output\UpliftVanCalculationGridResultTest.cs" />
+    <Compile Include="Creators\Output\WaternetCalculatorResultCreatorTest.cs" />
     <Compile Include="Kernels\MacroStabilityInwardsKernelWrapperFactoryTest.cs" />
     <Compile Include="Kernels\UpliftVan\UpliftVanKernelWrapperExceptionTest.cs" />
     <Compile Include="Kernels\Waternet\WaternetKernelWrapperExceptionTest.cs" />