diff --git a/Objects/Converters/ConverterAutocadCivil/ConverterAutocadCivilShared/ConverterAutocadCivil.Civil.cs b/Objects/Converters/ConverterAutocadCivil/ConverterAutocadCivilShared/ConverterAutocadCivil.Civil.cs
index 3459ea1499..4f2b16454f 100644
--- a/Objects/Converters/ConverterAutocadCivil/ConverterAutocadCivilShared/ConverterAutocadCivil.Civil.cs
+++ b/Objects/Converters/ConverterAutocadCivil/ConverterAutocadCivilShared/ConverterAutocadCivil.Civil.cs
@@ -1169,7 +1169,18 @@ private CivilAppliedAssembly AppliedAssemblyToSpeckle(AppliedAssembly appliedAss
       speckleSubassemblies.Add(speckleSubassembly);
     }
 
-    CivilAppliedAssembly speckleAppliedAssembly = new(speckleSubassemblies, appliedAssembly.AdjustedElevation, ModelUnits);
+    double? adjustedElevation = null;
+    try
+    {
+      adjustedElevation = appliedAssembly.AdjustedElevation;
+    }
+    catch (ArgumentException e) when (!e.IsFatal())
+    {
+      // Do nothing. Leave the value as null.
+    }
+
+    CivilAppliedAssembly speckleAppliedAssembly = new(speckleSubassemblies, adjustedElevation, ModelUnits);
+
     return speckleAppliedAssembly;
   }
 
diff --git a/Objects/Objects/BuiltElements/Civil/CivilAppliedAssembly.cs b/Objects/Objects/BuiltElements/Civil/CivilAppliedAssembly.cs
index f490c643de..be99041904 100644
--- a/Objects/Objects/BuiltElements/Civil/CivilAppliedAssembly.cs
+++ b/Objects/Objects/BuiltElements/Civil/CivilAppliedAssembly.cs
@@ -9,7 +9,7 @@ public CivilAppliedAssembly() { }
 
   public CivilAppliedAssembly(
     List<CivilAppliedSubassembly> appliedSubassemblies,
-    double adjustedElevation,
+    double? adjustedElevation,
     string units
   )
   {
@@ -20,7 +20,7 @@ string units
 
   public List<CivilAppliedSubassembly> appliedSubassemblies { get; set; }
 
-  public double adjustedElevation { get; set; }
+  public double? adjustedElevation { get; set; }
 
   public string units { get; set; }
 }