--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/WKmsImpl.java	Tue Mar 31 17:27:20 2015 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/WKmsImpl.java	Tue Mar 31 17:28:27 2015 +0200
@@ -112,8 +112,8 @@
     @Override
     public WKms filteredKms(double from, double to) {
         WKmsImpl retval = new WKmsImpl(getName());
-        for (int i = 0; i < size(); i++) {
-            double km = kms.getQuick(i);
+        for (int i = 0, S = size(); i < S; i++) {
+            double km = getKm(i);
             if (km >= from && km <= to) {
                 retval.add(km, getW(i));
             }