Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io.Tests/IoDamMStabDocSeriliazerTests.cs
===================================================================
diff -u -r3138 -r3141
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io.Tests/IoDamMStabDocSeriliazerTests.cs	(.../IoDamMStabDocSeriliazerTests.cs)	(revision 3138)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io.Tests/IoDamMStabDocSeriliazerTests.cs	(.../IoDamMStabDocSeriliazerTests.cs)	(revision 3141)
@@ -55,6 +55,9 @@
         private IoMStabDamDoc CreateMStabDamDocExample()
         {
             var ioMStabDamDoc = new IoMStabDamDoc();
+            const double xLeftBoundary = 1.0;
+            const double xRightBoundary = 15.00;
+            const double yDeep = -100.0;
 
             // Geometry Creation Options
             ioMStabDamDoc.MStabInput.GeometryCreationOptions.MaterialForDike = "DikeMaterial";
@@ -72,7 +75,7 @@
             // SurfaceLine
             ioMStabDamDoc.MStabInput.SurfaceLine.Add(new IoGeometryPoint()
             {
-                X = 1.0,
+                X = xLeftBoundary,
                 Y = 1.5
             });
             ioMStabDamDoc.MStabInput.SurfaceLine.Add(new IoGeometryPoint()
@@ -107,14 +110,14 @@
             });
             ioMStabDamDoc.MStabInput.SurfaceLine.Add(new IoGeometryPoint()
             {
-                X = 15.0,
+                X = xRightBoundary,
                 Y = 0.5
             });
 
             // Characteristic Points
             ioMStabDamDoc.MStabInput.CharacteristicPoints.Add(new IoCharacteristicPoint()
             {
-                X = 1.0,
+                X = xLeftBoundary,
                 Y = 1.5,
                 CharacteristicPointType = CharacteristicPointType.SurfaceLevelOutside
             });
@@ -144,11 +147,67 @@
             });
             ioMStabDamDoc.MStabInput.CharacteristicPoints.Add(new IoCharacteristicPoint()
             {
-                X = 15.0,
+                X = xRightBoundary,
                 Y = 0.5,
                 CharacteristicPointType = CharacteristicPointType.SurfaceLevelInside
             });
 
+            // PL-Lines
+            var pl1 = new IoPlLine();
+            pl1.IsPhreatic = true;
+            pl1.BoundaryLayer = 1;
+            pl1.Points.Add(new IoGeometryPoint()
+            {
+                X = xLeftBoundary,
+                Y = -1.0
+            });
+            pl1.Points.Add(new IoGeometryPoint()
+            {
+                X = 0.5 * (xRightBoundary + xLeftBoundary),
+                Y = -2.0
+            });
+            pl1.Points.Add(new IoGeometryPoint()
+            {
+                X = xRightBoundary,
+                Y = -1.5
+            });
+            ioMStabDamDoc.MStabInput.ExternalPlLines.Add(pl1);
+
+            var pl2 = new IoPlLine();
+            pl2.IsPhreatic = false;
+            pl2.BoundaryLayer = 2;
+            pl2.Points.Add(new IoGeometryPoint()
+            {
+                X = xLeftBoundary,
+                Y = yDeep
+            });
+            pl1.Points.Add(new IoGeometryPoint()
+            {
+                X = xRightBoundary,
+                Y = yDeep
+            });
+            ioMStabDamDoc.MStabInput.ExternalPlLines.Add(pl2);
+
+            var pl3 = new IoPlLine();
+            pl3.IsPhreatic = false;
+            pl3.BoundaryLayer = 1;
+            pl3.Points.Add(new IoGeometryPoint()
+            {
+                X = xLeftBoundary,
+                Y = yDeep
+            });
+            pl1.Points.Add(new IoGeometryPoint()
+            {
+                X = xRightBoundary,
+                Y = yDeep
+            });
+            ioMStabDamDoc.MStabInput.ExternalPlLines.Add(pl3);
+
+            var pl4 = new IoPlLine();
+            pl4.IsPhreatic = false;
+            pl4.BoundaryLayer = 0;
+            ioMStabDamDoc.MStabInput.ExternalPlLines.Add(pl4);
+
             return ioMStabDamDoc;
         }
     }