diff --git a/pom.xml b/pom.xml
index 85215898..4ac6dc1f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -195,5 +195,12 @@
 
       </plugin>
     </plugins>
+
+    <testResources>
+      <testResource>
+        <directory>src/test/resources</directory>
+        <filtering>true</filtering>
+      </testResource>
+    </testResources>
   </build>
 </project>
diff --git a/src/main/java/com/onthegomap/flatmap/OsmInputFile.java b/src/main/java/com/onthegomap/flatmap/OsmInputFile.java
index a827418b..773680d1 100644
--- a/src/main/java/com/onthegomap/flatmap/OsmInputFile.java
+++ b/src/main/java/com/onthegomap/flatmap/OsmInputFile.java
@@ -2,13 +2,18 @@ package com.onthegomap.flatmap;
 
 import com.google.protobuf.ByteString;
 import com.graphhopper.reader.ReaderElement;
-import com.onthegomap.flatmap.monitoring.Stats;
-import com.onthegomap.flatmap.worker.Topology;
-import com.onthegomap.flatmap.worker.WorkQueue;
+import com.graphhopper.reader.osm.pbf.PbfDecoder;
+import com.graphhopper.reader.osm.pbf.PbfStreamSplitter;
+import com.graphhopper.reader.osm.pbf.Sink;
+import com.onthegomap.flatmap.worker.Topology.SourceStep;
+import java.io.BufferedInputStream;
 import java.io.DataInputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.function.Consumer;
 import java.util.zip.DataFormatException;
 import java.util.zip.Inflater;
 import org.openstreetmap.osmosis.osmbinary.Fileformat.Blob;
@@ -64,18 +69,31 @@ public class OsmInputFile {
     }
   }
 
-  public WorkQueue<ReaderElement> newReaderQueue(String name, int threads, int size, int batchSize, Stats stats) {
-    return null;
+  public void readTo(Consumer<ReaderElement> next, int threads) throws IOException {
+    ExecutorService executorService = Executors.newFixedThreadPool(threads);
+    try (var stream = new BufferedInputStream(new FileInputStream(file), 50000)) {
+      PbfStreamSplitter streamSplitter = new PbfStreamSplitter(new DataInputStream(stream));
+      var sink = new ReaderElementSink(next);
+      PbfDecoder pbfDecoder = new PbfDecoder(streamSplitter, executorService, threads + 1, sink);
+      pbfDecoder.run();
+    } finally {
+      executorService.shutdownNow();
+    }
   }
 
-  public Topology.Builder<?, ReaderElement> newTopology(
-    String prefix,
-    int readerThreads,
-    int size,
-    int batchSize,
-    Stats stats
-  ) {
-    return Topology.start(prefix, stats)
-      .readFromQueue(newReaderQueue(prefix + "_reader_queue", readerThreads, size, batchSize, stats));
+  public SourceStep<ReaderElement> read(int threads) {
+    return next -> readTo(next, threads);
+  }
+
+  private static record ReaderElementSink(Consumer<ReaderElement> queue) implements Sink {
+
+    @Override
+    public void process(ReaderElement readerElement) {
+      queue.accept(readerElement);
+    }
+
+    @Override
+    public void complete() {
+    }
   }
 }
diff --git a/src/main/java/com/onthegomap/flatmap/Wikidata.java b/src/main/java/com/onthegomap/flatmap/Wikidata.java
index 1cbae368..8e630179 100644
--- a/src/main/java/com/onthegomap/flatmap/Wikidata.java
+++ b/src/main/java/com/onthegomap/flatmap/Wikidata.java
@@ -15,6 +15,7 @@ import com.graphhopper.util.StopWatch;
 import com.onthegomap.flatmap.monitoring.ProgressLoggers;
 import com.onthegomap.flatmap.monitoring.Stats;
 import com.onthegomap.flatmap.profiles.OpenMapTilesProfile;
+import com.onthegomap.flatmap.worker.Topology;
 import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
@@ -135,7 +136,9 @@ public class Wikidata {
       Wikidata fetcher = new Wikidata(writer, Client.wrap(client), 5_000);
       fetcher.loadExisting(oldMappings);
 
-      var topology = infile.newTopology("wikidata", readerThreads, 50_000, 10_000, stats)
+      var topology = Topology.start("wikidata", stats)
+        .fromGenerator("pbf", infile.read(readerThreads))
+        .addBuffer("reader_queue", 50_000, 10_000)
         .addWorker("filter", processThreads, fetcher::filter)
         .addBuffer("fetch_queue", 50_000)
         .sinkTo("fetch", 1, prev -> {
@@ -257,7 +260,7 @@ public class Wikidata {
     try {
       StopWatch timer = new StopWatch().start();
       LongObjectMap<Map<String, String>> results = queryWikidata(qidsToFetch);
-      LOGGER.info("Fetched batch " + batches.incrementAndGet() + " " + qidsToFetch.size() + " " + timer.stop());
+      LOGGER.info("Fetched batch " + batches.incrementAndGet() + " (" + qidsToFetch.size() + " qids) " + timer.stop());
       writeTranslations(results);
     } catch (IOException | InterruptedException | URISyntaxException e) {
       throw new RuntimeException(e);
@@ -351,7 +354,7 @@ public class Wikidata {
     public Map<String, String> getNameTranslations(ReaderElement elem) {
       long wikidataId = parseQid(elem.getTag("wikidata"));
       if (wikidataId > 0) {
-        return data.get(wikidataId);
+        return get(wikidataId);
       }
       return null;
     }
diff --git a/src/main/java/com/onthegomap/flatmap/monitoring/Stats.java b/src/main/java/com/onthegomap/flatmap/monitoring/Stats.java
index 81ca9a4a..de242fe1 100644
--- a/src/main/java/com/onthegomap/flatmap/monitoring/Stats.java
+++ b/src/main/java/com/onthegomap/flatmap/monitoring/Stats.java
@@ -1,6 +1,8 @@
 package com.onthegomap.flatmap.monitoring;
 
 import com.graphhopper.util.StopWatch;
+import java.util.Map;
+import java.util.TreeMap;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -21,13 +23,13 @@ public interface Stats {
   class InMemory implements Stats {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(InMemory.class);
+    private Map<String, StopWatch> timers = new TreeMap<>();
 
     @Override
     public void time(String name, Runnable task) {
-      StopWatch timer = new StopWatch().start();
-      LOGGER.info("[" + name + "] Starting...");
+      startTimer(name);
       task.run();
-      LOGGER.info("[" + name + "] Finished in " + timer.stop());
+      stopTimer(name);
     }
 
     @Override
@@ -37,12 +39,13 @@ public interface Stats {
 
     @Override
     public void startTimer(String name) {
-
+      timers.put(name, new StopWatch().start());
+      LOGGER.info("[" + name + "] Starting...");
     }
 
     @Override
     public void stopTimer(String name) {
-
+      LOGGER.info("[" + name + "] Finished in " + timers.get(name).stop());
     }
 
     @Override
diff --git a/src/main/java/com/onthegomap/flatmap/reader/OpenStreetMapReader.java b/src/main/java/com/onthegomap/flatmap/reader/OpenStreetMapReader.java
index 498058e8..33a127b9 100644
--- a/src/main/java/com/onthegomap/flatmap/reader/OpenStreetMapReader.java
+++ b/src/main/java/com/onthegomap/flatmap/reader/OpenStreetMapReader.java
@@ -61,9 +61,9 @@ public class OpenStreetMapReader implements Closeable {
   public void pass1(FlatMapConfig config) {
     Profile profile = config.profile();
     var topology = Topology.start("osm_pass1", stats)
-      .readFromQueue(
-        osmInputFile.newReaderQueue("osm_pass1_reader_queue", config.threads() - 1, 50_000, 10_000, stats)
-      ).sinkToConsumer("process", 1, (readerElement) -> {
+      .fromGenerator("pbf", osmInputFile.read(config.threads() - 1))
+      .addBuffer("reader_queue", 50_000, 10_000)
+      .sinkToConsumer("process", 1, (readerElement) -> {
         if (readerElement instanceof ReaderNode node) {
           TOTAL_NODES.incrementAndGet();
           nodeDb.put(node.getId(), GeoUtils.encodeFlatLocation(node.getLon(), node.getLat()));
@@ -116,9 +116,9 @@ public class OpenStreetMapReader implements Closeable {
     CountDownLatch waysDone = new CountDownLatch(processThreads);
 
     var topology = Topology.start("osm_pass2", stats)
-      .readFromQueue(
-        osmInputFile.newReaderQueue("osm_pass2_reader_queue", readerThreads, 50_000, 1_000, stats)
-      ).<RenderedFeature>addWorker("process", processThreads, (prev, next) -> {
+      .fromGenerator("pbf", osmInputFile.read(readerThreads))
+      .addBuffer("reader_queue", 50_000, 1_000)
+      .<RenderedFeature>addWorker("process", processThreads, (prev, next) -> {
         RenderableFeatures features = new RenderableFeatures();
         ReaderElement readerElement;
         while ((readerElement = prev.get()) != null) {
diff --git a/src/main/java/com/onthegomap/flatmap/worker/Topology.java b/src/main/java/com/onthegomap/flatmap/worker/Topology.java
index 926fc655..5e8af62d 100644
--- a/src/main/java/com/onthegomap/flatmap/worker/Topology.java
+++ b/src/main/java/com/onthegomap/flatmap/worker/Topology.java
@@ -30,6 +30,18 @@ public record Topology<T>(
     }
   }
 
+  public void await() {
+    if (previous != null) {
+      previous.await();
+    }
+    if (inputQueue != null) {
+      inputQueue.close();
+    }
+    if (worker != null) {
+      worker.await();
+    }
+  }
+
   public interface SourceStep<O> {
 
     void run(Consumer<O> next) throws Exception;
diff --git a/src/main/java/com/onthegomap/flatmap/worker/WorkQueue.java b/src/main/java/com/onthegomap/flatmap/worker/WorkQueue.java
index 43dd3c2f..8df4cff6 100644
--- a/src/main/java/com/onthegomap/flatmap/worker/WorkQueue.java
+++ b/src/main/java/com/onthegomap/flatmap/worker/WorkQueue.java
@@ -2,7 +2,10 @@ package com.onthegomap.flatmap.worker;
 
 import com.onthegomap.flatmap.monitoring.Stats;
 import java.io.Closeable;
+import java.io.IOException;
 import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Queue;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.BlockingQueue;
@@ -22,6 +25,7 @@ public class WorkQueue<T> implements Closeable, Supplier<T>, Consumer<T> {
   private final int pendingBatchesCapacity;
   private volatile boolean hasIncomingData = true;
   private final AtomicInteger pendingCount = new AtomicInteger(0);
+  private final List<Closeable> closeables = new ArrayList<>();
 
   public WorkQueue(String name, int capacity, int maxBatch, Stats stats) {
     this.pendingBatchesCapacity = capacity / maxBatch;
@@ -31,16 +35,19 @@ public class WorkQueue<T> implements Closeable, Supplier<T>, Consumer<T> {
 
   @Override
   public void close() {
-    for (Queue<T> q : queues.values()) {
-      try {
+    try {
+      for (Queue<T> q : queues.values()) {
         if (!q.isEmpty()) {
           itemQueue.put(q);
         }
-      } catch (InterruptedException e) {
-        throw new RuntimeException(e);
       }
+      hasIncomingData = false;
+      for (Closeable closeable : closeables) {
+        closeable.close();
+      }
+    } catch (InterruptedException | IOException e) {
+      throw new RuntimeException(e);
     }
-    hasIncomingData = false;
   }
 
   @Override
@@ -116,5 +123,9 @@ public class WorkQueue<T> implements Closeable, Supplier<T>, Consumer<T> {
   public int getCapacity() {
     return pendingBatchesCapacity * batchSize;
   }
+
+  public void alsoClose(Closeable toClose) {
+    closeables.add(toClose);
+  }
 }
 
diff --git a/src/test/java/com/onthegomap/flatmap/OsmInputFileTest.java b/src/test/java/com/onthegomap/flatmap/OsmInputFileTest.java
new file mode 100644
index 00000000..aad7f7cf
--- /dev/null
+++ b/src/test/java/com/onthegomap/flatmap/OsmInputFileTest.java
@@ -0,0 +1,45 @@
+package com.onthegomap.flatmap;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import com.graphhopper.reader.ReaderElement;
+import com.onthegomap.flatmap.monitoring.Stats.InMemory;
+import com.onthegomap.flatmap.worker.Topology;
+import java.io.File;
+import java.util.concurrent.atomic.AtomicInteger;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Timeout;
+
+public class OsmInputFileTest {
+
+  private OsmInputFile file = new OsmInputFile(new File("src/test/resources/andorra-latest.osm.pbf"));
+
+  @Test
+  public void testGetBounds() {
+    assertArrayEquals(new double[]{1.412368, 42.4276, 1.787481, 42.65717}, file.getBounds());
+  }
+
+  @Test
+  @Timeout(30)
+  public void testReadAndorraTwice() {
+    for (int i = 1; i <= 2; i++) {
+      AtomicInteger nodes = new AtomicInteger(0);
+      AtomicInteger ways = new AtomicInteger(0);
+      AtomicInteger rels = new AtomicInteger(0);
+      Topology.start("test", new InMemory())
+        .fromGenerator("pbf", file.read(2))
+        .addBuffer("reader_queue", 1_000, 100)
+        .sinkToConsumer("counter", 1, elem -> {
+          switch (elem.getType()) {
+            case ReaderElement.NODE -> nodes.incrementAndGet();
+            case ReaderElement.WAY -> ways.incrementAndGet();
+            case ReaderElement.RELATION -> rels.incrementAndGet();
+          }
+        }).await();
+      assertEquals(246_028, nodes.get(), "nodes pass " + i);
+      assertEquals(12_677, ways.get(), "ways pass " + i);
+      assertEquals(287, rels.get(), "rels pass " + i);
+    }
+  }
+}
diff --git a/src/test/resources/andorra-latest.osm.pbf b/src/test/resources/andorra-latest.osm.pbf
new file mode 100644
index 00000000..8a789c3d
Binary files /dev/null and b/src/test/resources/andorra-latest.osm.pbf differ