diff --git a/layers/waterway/etl_diagram.png b/layers/waterway/etl_diagram.png
index e2e229d..51e77bc 100644
Binary files a/layers/waterway/etl_diagram.png and b/layers/waterway/etl_diagram.png differ
diff --git a/layers/waterway/mapping.yaml b/layers/waterway/mapping.yaml
index cda6d05..2a34a41 100644
--- a/layers/waterway/mapping.yaml
+++ b/layers/waterway/mapping.yaml
@@ -1,20 +1,3 @@
-generalized_tables:
-  # etldoc: imposm3 -> osm_waterway_linestring_gen3
-  waterway_linestring_gen3:
-    source: waterway_linestring_gen2
-    sql_filter: waterway IN ('river')
-    tolerance: ZRES9
-  # etldoc: imposm3 -> osm_waterway_linestring_gen2
-  waterway_linestring_gen2:
-    source: waterway_linestring_gen1
-    sql_filter: waterway IN ('river')
-    tolerance: ZRES10
-  # etldoc: imposm3 -> osm_waterway_linestring_gen1
-  waterway_linestring_gen1:
-    source: waterway_linestring
-    sql_filter: waterway IN ('river') AND ST_IsValid(geometry)
-    tolerance: ZRES11
-
 tunnel_field: &tunnel
   key: tunnel
   name: is_tunnel
diff --git a/layers/waterway/update_waterway_linestring.sql b/layers/waterway/update_waterway_linestring.sql
index f23f6cd..7516f08 100644
--- a/layers/waterway/update_waterway_linestring.sql
+++ b/layers/waterway/update_waterway_linestring.sql
@@ -6,15 +6,6 @@ $$
     BEGIN
         UPDATE osm_waterway_linestring
         SET tags = update_tags(tags, geometry);
-
-        UPDATE osm_waterway_linestring_gen1
-        SET tags = update_tags(tags, geometry);
-
-        UPDATE osm_waterway_linestring_gen2
-        SET tags = update_tags(tags, geometry);
-
-        UPDATE osm_waterway_linestring_gen3
-        SET tags = update_tags(tags, geometry);
     END
 $$;