Index: dam failuremechanisms/damPiping/trunk/src/Deltares.DamPiping/PipingCalculatorBligh.cs
===================================================================
diff -u -r251 -r252
--- dam failuremechanisms/damPiping/trunk/src/Deltares.DamPiping/PipingCalculatorBligh.cs	(.../PipingCalculatorBligh.cs)	(revision 251)
+++ dam failuremechanisms/damPiping/trunk/src/Deltares.DamPiping/PipingCalculatorBligh.cs	(.../PipingCalculatorBligh.cs)	(revision 252)
@@ -12,7 +12,7 @@
         {
         }
 
-        public double? CalculatePipingFactor()
+        public double CalculatePipingFactor(double upliftCriterion)
         {
             //base.CalculatePipingFactor(location, surfaceLine, soilProfile, waterLevel);
             try
Index: dam failuremechanisms/damPiping/trunk/src/Deltares.DamPiping.Tests/PipingCalculatorBlighTests.cs
===================================================================
diff -u -r251 -r252
--- dam failuremechanisms/damPiping/trunk/src/Deltares.DamPiping.Tests/PipingCalculatorBlighTests.cs	(.../PipingCalculatorBlighTests.cs)	(revision 251)
+++ dam failuremechanisms/damPiping/trunk/src/Deltares.DamPiping.Tests/PipingCalculatorBlighTests.cs	(.../PipingCalculatorBlighTests.cs)	(revision 252)
@@ -14,7 +14,8 @@
         public void CanCalculateThePipingFactorUsingBlighNoUplift()
         {
             var calculator = new PipingCalculatorBligh();
-            var actual = calculator.CalculatePipingFactor();
+            const double upliftCriterion = 1.0;
+            var actual = calculator.CalculatePipingFactor(upliftCriterion);
         
             // Phreatic level in profile
             // Mass of soil volume above 
@@ -29,7 +30,38 @@
         
             Assert.AreEqual(expected, actual);
         }
-        
+
+//        [Test]
+//        public void CanCalculateThePipingFactorUsingBlighNoUplift()
+//        {
+//            using (var surfaceLine = FactoryForSurfaceLineTests.CreateSurfaceLineTutorial1())
+//            using (var dike = new Dike())
+//            {
+//                var soilProfile = FactoryForSoilProfileTests.CreateClaySandClaySandProfile();
+//
+//                var calculator = new PipingCalculatorBligh(new ModelParametersForPLLines(),
+//                    1.0, dike.GaugePLLines, dike.Gauges, 1.0);
+//                using (var location = new Location())
+//                {
+//                    var actual = calculator.CalculatePipingFactor(location, surfaceLine, soilProfile, 0.0);
+//
+//
+//                    // Phreatic level in profile
+//                    // Mass of soil volume above 
+//                    //   dry 6 m x 12 kN/m3 = 72
+//                    //   wet 9 m x 16 kN/m3 = 144
+//                    //   Total: 72 + 144 = 216
+//                    // Phreatic pressure
+//                    //   20 m x 10 kN/m3 = 200
+//                    // UpliftFactor = 216/200 = 1.08
+//                    // UpliftFactor > 1.0, so no piping, so returns cDefaultMaxReturnValue
+//                    var expected = PipingCalculatorBligh.cDefaultMaxReturnValue;
+//
+//                    Assert.AreEqual(expected, actual);
+//                }
+//            }
+//        }
+
         //        [Test]
         //        public void CanCalculateThePipingFactorUsingBligh()
         //        {