diff --git a/src/main/java/com/conveyal/analysis/results/BaseResultWriter.java b/src/main/java/com/conveyal/analysis/results/BaseResultWriter.java
deleted file mode 100644
index 8bcf94d26..000000000
--- a/src/main/java/com/conveyal/analysis/results/BaseResultWriter.java
+++ /dev/null
@@ -1,87 +0,0 @@
-package com.conveyal.analysis.results;
-
-import com.conveyal.file.FileCategory;
-import com.conveyal.file.FileStorage;
-import com.conveyal.file.FileStorageKey;
-import com.conveyal.file.FileUtils;
-import com.google.common.io.ByteStreams;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.zip.GZIPOutputStream;
-
-import static com.conveyal.file.FileCategory.RESULTS;
-import static com.conveyal.r5.common.Util.human;
-
-/**
- * This is an abstract base class for writing regional analysis results into a file for long term
- * storage. It provides reuseable logic for creating local buffer files and uploading them to long
- * term cloud storage once the regional analysis is complete. Concrete subclasses handle writing CSV
- * or proprietary binary grid files, depending on the type of regional analysis.
- */
-public abstract class BaseResultWriter {
-
-    private static final Logger LOG = LoggerFactory.getLogger(BaseResultWriter.class);
-
-    private final FileStorage fileStorage;
-
-    protected File bufferFile;
-
-    public BaseResultWriter (FileStorage fileStorage) {
-        this.fileStorage = fileStorage;
-    }
-
-    // Can this be merged into the constructor?
-    protected void prepare (String jobId) {
-        try {
-            bufferFile = File.createTempFile(jobId + "_", ".results");
-            // On unexpected server shutdown, these files should be deleted.
-            // We could attempt to recover from shutdowns but that will take a lot of changes and persisted data.
-            bufferFile.deleteOnExit();
-        } catch (IOException e) {
-            LOG.error("Exception while creating buffer file for multi-origin assembler: " + e.toString());
-        }
-    }
-
-    /**
-     * Gzip the access grid and store it.
-     */
-    protected synchronized void finish (String fileName) throws IOException {
-        LOG.info("Compressing {} and moving into file storage.", fileName);
-        FileStorageKey fileStorageKey = new FileStorageKey(RESULTS, fileName);
-        File gzippedResultFile = FileUtils.createScratchFile();
-
-        // There's probably a more elegant way to do this with NIO and without closing the buffer.
-        // That would be Files.copy(File.toPath(),X) or ByteStreams.copy.
-        // Perhaps better: we could wrap the output buffer in a gzip output stream and zip as we write out.
-        InputStream is = new BufferedInputStream(new FileInputStream(bufferFile));
-        OutputStream os = new GZIPOutputStream(new BufferedOutputStream(new FileOutputStream(gzippedResultFile)));
-        ByteStreams.copy(is, os);
-        is.close();
-        os.close();
-
-        LOG.info("GZIP compression reduced analysis results {} from {} to {} ({}x compression)",
-                fileName,
-                human(bufferFile.length(), "B"),
-                human(gzippedResultFile.length(), "B"),
-                (double) bufferFile.length() / gzippedResultFile.length()
-        );
-
-        fileStorage.moveIntoStorage(fileStorageKey, gzippedResultFile);
-        bufferFile.delete();
-    }
-
-    /**
-     * Close all buffers and temporary files.
-     */
-    abstract void terminate () throws Exception;
-
-}