Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Read/ReadConversionCollector.cs
===================================================================
diff -u -r04cb34562587c9b06345f2e639c57394e6a7d0a7 -r4f89601cb9d77ff379727afd64f902a0aff74fa3
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Read/ReadConversionCollector.cs	(.../ReadConversionCollector.cs)	(revision 04cb34562587c9b06345f2e639c57394e6a7d0a7)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Read/ReadConversionCollector.cs	(.../ReadConversionCollector.cs)	(revision 4f89601cb9d77ff379727afd64f902a0aff74fa3)
@@ -56,6 +56,7 @@
         private readonly Dictionary<ClosingStructureEntity, ClosingStructure> closingStructures = CreateDictionary<ClosingStructureEntity, ClosingStructure>();
         private readonly Dictionary<StabilityPointStructureEntity, StabilityPointStructure> stabilityPointStructures = CreateDictionary<StabilityPointStructureEntity, StabilityPointStructure>();
         private readonly Dictionary<HeightStructuresCalculationEntity, StructuresCalculation<HeightStructuresInput>> heightStructuresCalculations = CreateDictionary<HeightStructuresCalculationEntity, StructuresCalculation<HeightStructuresInput>>();
+        private readonly Dictionary<ClosingStructuresCalculationEntity, StructuresCalculation<ClosingStructuresInput>> closingStructuresCalculations = CreateDictionary<ClosingStructuresCalculationEntity, StructuresCalculation<ClosingStructuresInput>>();
 
         private static Dictionary<TEntity, TModel> CreateDictionary<TEntity, TModel>()
         {
@@ -997,6 +998,77 @@
 
         #endregion
 
+        #region ClosingStructuresCalculationEntity: Read, Contains, Get
+
+        /// <summary>
+        /// Registers a read operation for <see cref="ClosingStructuresCalculationEntity"/>
+        /// and the <see cref="StructuresCalculation{T}"/> that was constructed
+        /// with the information.
+        /// </summary>
+        /// <param name="entity">The <see cref="ClosingStructuresCalculationEntity"/>
+        /// that was read.</param>
+        /// <param name="model">The <see cref="StructuresCalculation{T}"/> that
+        /// was constructed.</param>
+        /// <exception cref="ArgumentNullException">Thrown when any input parameter is <c>null</c>.</exception>
+        internal void Read(ClosingStructuresCalculationEntity entity, StructuresCalculation<ClosingStructuresInput> model)
+        {
+            if (entity == null)
+            {
+                throw new ArgumentNullException("entity");
+            }
+            if (model == null)
+            {
+                throw new ArgumentNullException("model");
+            }
+
+            closingStructuresCalculations[entity] = model;
+        }
+
+        /// <summary>
+        /// Checks whether a read operation has been registered for a given <see cref="ClosingStructuresCalculationEntity"/>.
+        /// </summary>
+        /// <param name="entity">The <see cref="ClosingStructuresCalculationEntity"/> to check for.</param>
+        /// <returns><c>true</c> if the <paramref cref="entity"/> was read before, <c>false</c> otherwise.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="entity"/> is <c>null</c>.</exception>
+        internal bool Contains(ClosingStructuresCalculationEntity entity)
+        {
+            if (entity == null)
+            {
+                throw new ArgumentNullException("entity");
+            }
+            return closingStructuresCalculations.ContainsKey(entity);
+        }
+
+        /// <summary>
+        /// Obtains the <see cref="StructuresCalculation{T}"/> which was read
+        /// for the given <see cref="ClosingStructuresCalculationEntity"/>.
+        /// </summary>
+        /// <param name="entity">The <see cref="ClosingStructuresCalculationEntity"/> for which a read
+        /// operation has been registered.</param>
+        /// <returns>The constructed <see cref="StructuresCalculation{T}"/>.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="entity"/> is <c>null</c>.</exception>
+        /// <exception cref="InvalidOperationException">Thrown when no read operation has
+        /// been registered for <paramref name="entity"/>.</exception>
+        /// <remarks>Use <see cref="Contains(ClosingStructuresCalculationEntity)"/>
+        /// to find out whether a read operation has been registered for <paramref name="entity"/>.</remarks>
+        internal StructuresCalculation<ClosingStructuresInput> Get(ClosingStructuresCalculationEntity entity)
+        {
+            if (entity == null)
+            {
+                throw new ArgumentNullException("entity");
+            }
+            try
+            {
+                return closingStructuresCalculations[entity];
+            }
+            catch (KeyNotFoundException e)
+            {
+                throw new InvalidOperationException(e.Message, e);
+            }
+        }
+
+        #endregion
+
         #region StabilityPointStructureEntity: Read, Contains, Get
 
         /// <summary>