--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/Calculation6.java	Thu Aug 15 15:57:54 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/Calculation6.java	Thu Aug 15 16:05:17 2013 +0200
@@ -37,6 +37,7 @@
     private long []   timerange;
     private double [] values;
     private Long      officialGaugeNumber;
+    private String    riverName;
 
 
     public Calculation6(HistoricalDischargeAccess access) {
@@ -45,6 +46,7 @@
         double [] vs = mode != null && mode == EvaluationMode.W
             ? access.getWs()
             : access.getQs();
+        riverName = access.getRiver();
 
         Long officialGaugeNumber = access.getOfficialGaugeNumber();
 
@@ -98,7 +100,8 @@
             return null;
         }
 
-        Gauge gauge = Gauge.getGaugeByOfficialNumber(officialGaugeNumber);
+        Gauge gauge = Gauge.getGaugeByOfficialNumber(officialGaugeNumber,
+                riverName);
         if (gauge == null) {
             // TODO: i18n
             return error("hist.discharge.gauge.not.found");