diff --git a/config.json b/config.json
index d2a420b..5e6ceb7 100644
--- a/config.json
+++ b/config.json
@@ -38,6 +38,21 @@
             "simplify_ratio": 2,
 	    "combine_below": 15
         },
+        "dam_lines": {
+            "minzoom": 12,
+            "maxzoom": 14,
+            "simplify_below": 14,
+            "simplify_level": 0.0001,
+            "simplify_ratio": 2,
+	    "combine_below": 15
+        },
+        "dam_polygons": {
+            "minzoom": 12,
+            "maxzoom": 14,
+            "simplify_below": 14,
+            "simplify_level": 0.0001,
+            "simplify_ratio": 2
+        },
         "pier_lines": {
             "minzoom": 12,
             "maxzoom": 14,
diff --git a/process.lua b/process.lua
index ccc9038..93c9db0 100644
--- a/process.lua
+++ b/process.lua
@@ -807,7 +807,6 @@ function process_ferries(way)
 end
 
 function process_bridges(way)
-	local mz = inf_zoom
 	if way:Find("man_made") == "bridge" then
 		way:Layer("bridges", true)
 		way:MinZoom(12)
@@ -815,6 +814,18 @@ function process_bridges(way)
 	end
 end
 
+function process_dam(way, polygon)
+	if way:Find("waterway") == "dam" then
+		if polygon then
+			way:Layer("dam_polygons", true)
+		else
+			way:Layer("dam_lines", false)
+		end
+		way:MinZoom(12)
+		way:Attribute("kind", "dam")
+	end
+end
+
 function way_function(way)
 	local area = way:Area()
 	local area_tag = way:Find("area")
@@ -827,13 +838,15 @@ function way_function(way)
 	-- If closed ways are assumed to be rings by default except tagged with area=yes, type=multipolygon or type=boundary
 	local is_area_default_linear = area > 0 and (area_tag == "yes" or type_tag == "multipolygon" or type_tag == "boundary")
 
-	-- Layers water_polygons, water_polygons_labels
+	-- Layers water_polygons, water_polygons_labels, dam_polygons
 	if is_area and (way:Holds("waterway") or way:Holds("natural") or way:Holds("landuse")) then
 		process_water_polygons(way)
+		process_dam(way, true)
 	end
-	-- Layers water_lines, water_lines_labels
+	-- Layers water_lines, water_lines_labels, dam_lines
 	if not is_area and way:Holds("waterway") then
 		process_water_lines(way)
+		process_dam(way, false)
 	end
 
 	-- Layer pier_lines, pier_polygons
diff --git a/tilestats.json b/tilestats.json
index b173f0f..43b3051 100644
--- a/tilestats.json
+++ b/tilestats.json
@@ -1,6 +1,6 @@
 {
     "tilestats": {
-        "layerCount": 19,
+        "layerCount": 22,
         "layers": [
             {
                 "layer": "place_labels",
@@ -26,6 +26,14 @@
                 "layer": "water_lines_labels",
                 "geometry": "LineString"
             },
+            {
+                "layer": "dam_lines",
+                "geometry": "LineString"
+            },
+            {
+                "layer": "dam_polygons",
+                "geometry": "Polygon"
+            },
             {
                 "layer": "pier_lines",
                 "geometry": "LineString"
@@ -34,6 +42,10 @@
                 "layer": "pier_polygons",
                 "geometry": "Polygon"
             },
+            {
+                "layer": "bridges",
+                "geometry": "Polygon"
+            },
             {
                 "layer": "streets",
                 "geometry": "LineString"