--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java	Tue Nov 13 14:46:44 2012 +0100
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java	Tue Nov 13 14:48:57 2012 +0100
@@ -28,7 +28,9 @@
 import de.intevation.flys.artifacts.model.WW;
 import de.intevation.flys.artifacts.model.WstValueTable;
 import de.intevation.flys.artifacts.model.WstValueTableFactory;
+import de.intevation.flys.artifacts.model.extreme.ExtremeResult;
 
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
 import de.intevation.flys.artifacts.states.LocationDistanceSelect;
 
 import de.intevation.flys.model.DischargeTable;
@@ -157,6 +159,15 @@
     //
     // METHODS FOR RETRIEVING COMPUTED DATA FOR DIFFERENT CHART TYPES
     //
+    //
+    /**
+     * Returns the data that is computed by a waterlevel computation.
+     *
+     * @return an array of data triples that consist of W, Q and Kms.
+     */
+    public CalculationResult getWaterlevelData() {
+        return this.getWaterlevelData(null);
+    }
 
     /**
      * Returns the data that is computed by a waterlevel computation.
@@ -167,11 +178,15 @@
     {
         logger.debug("WINFOArtifact.getWaterlevelData");
 
-        if (getDataAsString("calculation_mode")
-            .equals("calc.discharge.longitudinal.section")
+        String calculationMode = getDataAsString("calculation_mode");
+
+        if (calculationMode.equals("calc.discharge.longitudinal.section")
         ) {
             return getDischargeLongitudinalSectionData();
         }
+        else if (calculationMode.equals("calc.extreme.curve")) {
+            return (CalculationResult) this.compute(context, ComputeType.ADVANCE, false);
+        }
 
         River river = FLYSUtils.getRiver(this);
         if (river == null) {
@@ -625,13 +640,22 @@
      */
     @Override
     public Lines.LineData getWaterLines(int idx, FastCrossSectionLine csl,
-        double nextIgnored, double prevIgnored) {
+        double nextIgnored, double prevIgnored, CallContext context) {
         logger.debug("getWaterLines(" + idx + ")");
 
         List<Point2D> points = csl.getPoints();
 
         // Need W at km
-        WQKms [] wqkms = (WQKms[]) getWaterlevelData().getData();
+        Object waterlevelResult = getWaterlevelData(context).getData();
+        WQKms [] wqkms;
+
+        if (waterlevelResult instanceof ExtremeResult) {
+            wqkms = ((ExtremeResult) waterlevelResult).getWQKms();
+        }
+        else {
+            wqkms = (WQKms[]) waterlevelResult;
+        }
+
         if (wqkms.length == 0) {
             logger.error("No WQKms found.");
             return Lines.createWaterLines(points, 0.0f);
@@ -643,12 +667,12 @@
             return waterLineC(idx, csl);
         }
 
+        // Find W at km, linear naive approach.
+        WQKms triple = wqkms[idx];
+
         // Find index of km.
         double wishKM = csl.getKm();
 
-        // Find W at km, linear naive approach.
-        WQKms triple = wqkms[idx];
-
         if (triple.size() == 0) {
             logger.warn("Calculation of waterline is empty.");
             return Lines.createWaterLines(points, 0.0f);

--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/extreme/ExtremeCompute.java	Tue Nov 13 14:46:44 2012 +0100
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/extreme/ExtremeCompute.java	Tue Nov 13 14:48:57 2012 +0100
@@ -9,6 +9,7 @@
 import de.intevation.flys.artifacts.access.ExtremeAccess;
 
 import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.CrossSectionWaterLineFacet;
 import de.intevation.flys.artifacts.model.DataFacet;
 import de.intevation.flys.artifacts.model.FacetTypes;
 import de.intevation.flys.artifacts.model.ReportFacet;
@@ -88,9 +89,11 @@
                 i, LONGITUDINAL_W, name, ComputeType.ADVANCE, id, hash);
             Facet q = new WaterlevelFacet(
                 i, LONGITUDINAL_Q, qname, ComputeType.ADVANCE, id, hash);
+            Facet csFacet = new CrossSectionWaterLineFacet(i, name);
 
             facets.add(w);
             facets.add(q);
+            facets.add(csFacet);
         }