diff --git a/src/HallC_LinkDef.h b/src/HallC_LinkDef.h
index ef0afaba16449b7735e9b849ac8444b7af41d041..1adde52154b19a28f32b4695d473ebded7a23c91 100644
--- a/src/HallC_LinkDef.h
+++ b/src/HallC_LinkDef.h
@@ -8,5 +8,6 @@
 
 #pragma link C++ class THcInterface+;
 #pragma link C++ class THcParmList+;
+#pragma link C++ class THcCrateMap+;
 
 #endif
diff --git a/src/THcCrateMap.cxx b/src/THcCrateMap.cxx
new file mode 100644
index 0000000000000000000000000000000000000000..2546770da5da3f488f1dc536eb4c5148e6bb9002
--- /dev/null
+++ b/src/THcCrateMap.cxx
@@ -0,0 +1,46 @@
+/////////////////////////////////////////////////////////////////////
+//
+//  THcCrateMap
+//  Layout, or "map", of DAQ Crates.
+//
+//  THaCrateMap contains info on how the DAQ crates
+//  are arranged in Hall A, i.e whether slots are
+//  fastbus or vme, what the module types are, and
+//  what header info to expect.  Probably nobody needs
+//  to know about this except the author, and at present
+//  an object of this class is a private member of the decoder.
+//
+//  author  Robert Michaels (rom@jlab.org)
+//  author  Stephen Wood (saw@jlab.org)
+//
+/////////////////////////////////////////////////////////////////////
+
+
+#include "THcCrateMap.h"
+
+#include "TError.h"
+
+using namespace std;
+
+THcCrateMap::THcCrateMap( const char* db_filename )
+{
+  // Need to do something different since we are going to read
+  // a Hall C style map file.
+
+  // Construct uninitialized crate map. The argument is the name of
+  // the database file to use for initialization
+
+  if( !db_filename || !*db_filename ) {
+    ::Warning( "THcCrateMap", "Undefined database file name, "
+	       "using default \"db_cratemap.dat\"" );
+    db_filename = "cratemap";
+  }
+  // Why does this give an error?  Can't I use a private
+  // member of the class I inherit from?
+  fMapfileName = db_filename;
+
+}
+
+
+
+ClassImp(THcCrateMap)
diff --git a/src/THcCrateMap.h b/src/THcCrateMap.h
new file mode 100644
index 0000000000000000000000000000000000000000..e286323d9f8a623fb5bee50a4eb6e7286b895c7c
--- /dev/null
+++ b/src/THcCrateMap.h
@@ -0,0 +1,41 @@
+#ifndef THcCrateMap_
+#define THcCrateMap_
+
+/////////////////////////////////////////////////////////////////////
+//
+//  THcCrateMap
+//  Layout, or "map", of DAQ Crates.
+//
+//  Inheriting from THaCrateMap
+//
+//  THcCrateMap contains info on how the DAQ crates
+//  are arranged in Hall A, i.e whether slots are
+//  fastbus or vme, what the module types are, and
+//  what header info to expect.  Probably nobody needs
+//  to know about this except the author, and at present
+//  an object of this class is a private member of the decoder.
+//
+//  author  Robert Michaels (rom@jlab.org)
+//  author  Stephen Wood (saw@jlab.org)
+//
+/////////////////////////////////////////////////////////////////////
+
+
+#include "THaCrateMap.h"
+
+class THcCrateMap : public THaCrateMap {
+
+ public:
+
+  THcCrateMap( const char* db = "cratemap" );    // Construct uninitialized
+
+ private:
+
+  TString fMapfileName;
+
+ protected:
+  ClassDef(THcCrateMap,0) // Crate map
+
+
+};     
+#endif