Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Data/GeneralStabilityPointStructuresInput.cs
===================================================================
diff -u -racbfe5601241d7e7e0470194aab84b9425621d54 -r089f0abe5d625aab250b317711d5ba73fa5e03a1
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Data/GeneralStabilityPointStructuresInput.cs	(.../GeneralStabilityPointStructuresInput.cs)	(revision acbfe5601241d7e7e0470194aab84b9425621d54)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Data/GeneralStabilityPointStructuresInput.cs	(.../GeneralStabilityPointStructuresInput.cs)	(revision 089f0abe5d625aab250b317711d5ba73fa5e03a1)
@@ -32,8 +32,10 @@
     public class GeneralStabilityPointStructuresInput
     {
         private const int numberOfDecimalPlacesN = 2;
+
         private static readonly Range<RoundedDouble> validityRangeN = new Range<RoundedDouble>(new RoundedDouble(numberOfDecimalPlacesN, 1),
                                                                                                new RoundedDouble(numberOfDecimalPlacesN, 20));
+
         private RoundedDouble n;
 
         /// <summary>
@@ -63,6 +65,12 @@
                 StandardDeviation = (RoundedDouble) 0.05
             };
 
+            ModelFactorLongThreshold = new NormalDistribution(2)
+            {
+                Mean = (RoundedDouble) 0.9,
+                StandardDeviation = (RoundedDouble) 0.05
+            };
+
             ModelFactorInflowVolume = new RoundedDouble(2, 1);
             ModificationFactorWavesSlowlyVaryingPressureComponent = new RoundedDouble(0, 1);
             ModificationFactorDynamicOrImpulsivePressureComponent = new RoundedDouble(0, 1);
@@ -123,6 +131,11 @@
         public NormalDistribution ModelFactorLoadEffect { get; }
 
         /// <summary>
+        /// Gets the model factor for long threshold.
+        /// </summary>
+        public NormalDistribution ModelFactorLongThreshold { get; }
+
+        /// <summary>
         /// Gets the model factor for incoming flow volume.
         /// </summary>
         public RoundedDouble ModelFactorInflowVolume { get; }
Index: Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Data.Test/GeneralStabilityPointStructuresInputTest.cs
===================================================================
diff -u -racbfe5601241d7e7e0470194aab84b9425621d54 -r089f0abe5d625aab250b317711d5ba73fa5e03a1
--- Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Data.Test/GeneralStabilityPointStructuresInputTest.cs	(.../GeneralStabilityPointStructuresInputTest.cs)	(revision acbfe5601241d7e7e0470194aab84b9425621d54)
+++ Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Data.Test/GeneralStabilityPointStructuresInputTest.cs	(.../GeneralStabilityPointStructuresInputTest.cs)	(revision 089f0abe5d625aab250b317711d5ba73fa5e03a1)
@@ -53,6 +53,12 @@
                 StandardDeviation = (RoundedDouble) 0.05
             };
 
+            var modelFactorLongThreshold = new NormalDistribution(2)
+            {
+                Mean = (RoundedDouble) 0.9,
+                StandardDeviation = (RoundedDouble) 0.05
+            };
+
             // Call
             var inputParameters = new GeneralStabilityPointStructuresInput();
 
@@ -66,6 +72,7 @@
             DistributionAssert.AreEqual(modelFactorStorageVolume, inputParameters.ModelFactorStorageVolume);
             DistributionAssert.AreEqual(modelFactorCollisionLoad, inputParameters.ModelFactorCollisionLoad);
             DistributionAssert.AreEqual(modelFactorLoadEffect, inputParameters.ModelFactorLoadEffect);
+            DistributionAssert.AreEqual(modelFactorLongThreshold, inputParameters.ModelFactorLongThreshold);
 
             Assert.AreEqual(2, inputParameters.ModelFactorInflowVolume.NumberOfDecimalPlaces);
             Assert.AreEqual(1, inputParameters.ModelFactorInflowVolume, inputParameters.ModelFactorInflowVolume.GetAccuracy());