Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Read/ReadConversionCollector.cs
===================================================================
diff -u -r583a729a502f52ca415627efcb2287886e8efb1d -r9ee8f17742a5407fd9453aeb12f20cfedb20c73e
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Read/ReadConversionCollector.cs	(.../ReadConversionCollector.cs)	(revision 583a729a502f52ca415627efcb2287886e8efb1d)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Read/ReadConversionCollector.cs	(.../ReadConversionCollector.cs)	(revision 9ee8f17742a5407fd9453aeb12f20cfedb20c73e)
@@ -23,6 +23,7 @@
 using System.Collections.Generic;
 using Application.Ringtoets.Storage.DbContext;
 using Core.Common.Utils;
+using Ringtoets.ClosingStructures.Data;
 using Ringtoets.Common.Data.DikeProfiles;
 using Ringtoets.Common.Data.FailureMechanism;
 using Ringtoets.GrassCoverErosionInwards.Data;
@@ -50,6 +51,7 @@
         private readonly Dictionary<ForeshoreProfileEntity, ForeshoreProfile> foreshoreProfiles = CreateDictionary<ForeshoreProfileEntity, ForeshoreProfile>();
         private readonly Dictionary<GrassCoverErosionInwardsCalculationEntity, GrassCoverErosionInwardsCalculation> grassCoverErosionInwardsCalculations = CreateDictionary<GrassCoverErosionInwardsCalculationEntity, GrassCoverErosionInwardsCalculation>();
         private readonly Dictionary<HeightStructureEntity, HeightStructure> heightStructures = CreateDictionary<HeightStructureEntity, HeightStructure>();
+        private readonly Dictionary<ClosingStructureEntity, ClosingStructure> closingStructures = CreateDictionary<ClosingStructureEntity, ClosingStructure>();
 
         private static Dictionary<TEntity, TModel> CreateDictionary<TEntity, TModel>()
         {
@@ -847,5 +849,77 @@
         }
 
         #endregion
+
+        #region ClosingStructureEntity: Read, Contains, Get
+
+        /// <summary>
+        /// Registers a read operation for <see cref="ClosingStructureEntity"/> and the
+        /// <see cref="ClosingStructure"/> that was constructed with the information.
+        /// </summary>
+        /// <param name="entity">The <see cref="ClosingStructureEntity"/> that was read.</param>
+        /// <param name="model">The <see cref="ClosingStructure"/> that was constructed.</param>
+        /// <exception cref="ArgumentNullException">Thrown when either:
+        /// <list type="bullet">
+        /// <item><paramref name="entity"/> is <c>null</c></item>
+        /// <item><paramref name="model"/> is <c>null</c></item>
+        /// </list></exception>
+        internal void Read(ClosingStructureEntity entity, ClosingStructure model)
+        {
+            if (entity == null)
+            {
+                throw new ArgumentNullException("entity");
+            }
+            if (model == null)
+            {
+                throw new ArgumentNullException("model");
+            }
+
+            closingStructures[entity] = model;
+        }
+
+        /// <summary>
+        /// Checks whether a read operation has been registered for a given <see cref="ClosingStructureEntity"/>.
+        /// </summary>
+        /// <param name="entity">The <see cref="ClosingStructureEntity"/> 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(ClosingStructureEntity entity)
+        {
+            if (entity == null)
+            {
+                throw new ArgumentNullException("entity");
+            }
+            return closingStructures.ContainsKey(entity);
+        }
+
+        /// <summary>
+        /// Obtains the <see cref="ClosingStructure"/> which was read for the
+        /// given <see cref="ClosingStructureEntity"/>.
+        /// </summary>
+        /// <param name="entity">The <see cref="ClosingStructureEntity"/> for which a read
+        /// operation has been registered.</param>
+        /// <returns>The constructed <see cref="ClosingStructure"/>.</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(ClosingStructureEntity)"/> to find out whether a
+        /// read operation has been registered for <paramref name="entity"/>.</remarks>
+        internal ClosingStructure Get(ClosingStructureEntity entity)
+        {
+            if (entity == null)
+            {
+                throw new ArgumentNullException("entity");
+            }
+            try
+            {
+                return closingStructures[entity];
+            }
+            catch (KeyNotFoundException e)
+            {
+                throw new InvalidOperationException(e.Message, e);
+            }
+        }
+
+        #endregion
     }
 }
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