--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/SedimentLoadData.java	Fri Sep 05 12:19:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/SedimentLoadData.java	Fri Sep 05 12:22:42 2014 +0200
@@ -17,10 +17,14 @@
 import java.util.TreeMap;
 import java.util.TreeSet;
 
-import org.dive4elements.river.backend.utils.EpsilonComparator;
+import org.apache.log4j.Logger;
+
+import org.dive4elements.river.utils.EpsilonComparator;
 
 public class SedimentLoadData implements Serializable
 {
+    private static Logger logger = Logger.getLogger(SedimentLoadData.class);
+
     public static final int GF_UNKNOWN            = -1;
     public static final int GF_COARSE             =  0;
     public static final int GF_FINE_MIDDLE        =  1;
@@ -104,11 +108,14 @@
 
         private int id;
         private int kind;
+        private int sqRelId;
 
         private String description;
 
         private Date startTime;
         private Date stopTime;
+        private Date sqStartTime;
+        private Date sqStopTime;
 
         public Load() {
         }
@@ -118,19 +125,30 @@
             int    kind,
             String description,
             Date   startTime,
-            Date   stopTime
+            Date   stopTime,
+            int    sqRelId,
+            Date   sqStartTime,
+            Date   sqStopTime
         ) {
             this.id          = id;
             this.kind        = kind;
             this.description = description;
             this.startTime   = startTime;
             this.stopTime    = stopTime;
+            this.sqStartTime = sqStartTime;
+            this.sqStopTime  = sqStopTime;
+            this.sqRelId     = sqRelId;
+            logger.debug("Creating Load with sqrelid: " + sqRelId + " start: "+ sqStartTime);
         }
 
         public int getId() {
             return id;
         }
 
+        public int getSQRelationTimeIntervalId() {
+            return sqRelId;
+        }
+
         public int getKind() {
             return kind;
         }
@@ -147,6 +165,14 @@
             return stopTime;
         }
 
+        public Date getSQStartTime() {
+            return startTime;
+        }
+
+        public Date getSQStopTime() {
+            return stopTime;
+        }
+
         public boolean isEpoch() {
             return startTime != null && stopTime != null;
         }
@@ -414,6 +440,51 @@
         }
     };
 
+    public static final Comparator<Load> LOAD_SQ_TI_CMP = new Comparator<Load>() {
+        @Override
+        public int compare(Load a, Load b) {
+            return a.getSQRelationTimeIntervalId() - b.getSQRelationTimeIntervalId();
+        }
+    };
+
+    public static final Comparator<Load> LOAD_ID_SQ_TI_CMP = new Comparator<Load>() {
+        @Override
+        public int compare(Load a, Load b) {
+            return LOAD_ID_CMP.compare(a, b) + LOAD_SQ_TI_CMP.compare(a,b);
+        }
+    };
+
+    /** Find all loads in the range a/b with the according sq_time_interval */
+    public Collection<Load> findLoads(double a, double b, int sqRelationTimeInterval) {
+        final TreeSet<Load> loads = new TreeSet<Load>(LOAD_ID_SQ_TI_CMP);
+
+        findStations(a, b, new Visitor() {
+            @Override
+            public void visit(Station station) {
+                station.allLoads(loads);
+            }
+        });
+
+        return loads;
+    }
+
+    /** Get a list of loads with unique sq_time_intervals.
+     *
+     * This is mainly a convenience function for the SedimentLoadInfoService.
+     */
+    public Collection<Load> findUniqueTimeIntervalLoads(double a, double b) {
+        final TreeSet<Load> loads = new TreeSet<Load>(LOAD_SQ_TI_CMP);
+
+        findStations(a, b, new Visitor() {
+            @Override
+            public void visit(Station station) {
+                station.allLoads(loads);
+            }
+        });
+
+        return loads;
+    }
+
     public Collection<Load> findLoads(double a, double b) {
         final TreeSet<Load> loads = new TreeSet<Load>(LOAD_ID_CMP);