diff --git a/s3/src/main/scala/geotrellis/spark/io/s3/S3GeoTiffRDD.scala b/s3/src/main/scala/geotrellis/spark/io/s3/S3GeoTiffRDD.scala
index f231184d0f..8362cc8876 100644
--- a/s3/src/main/scala/geotrellis/spark/io/s3/S3GeoTiffRDD.scala
+++ b/s3/src/main/scala/geotrellis/spark/io/s3/S3GeoTiffRDD.scala
@@ -213,7 +213,6 @@ object S3GeoTiffRDD extends LazyLogging {
 
           RasterReader
             .listWindows(cols, rows, options.maxTileSize.getOrElse(1<<10), layout.tileCols, layout.tileRows)
-            ._3
             .map((objectRequest, _))
         }
 
diff --git a/spark/src/main/scala/geotrellis/spark/io/GeoTiffInfoReader.scala b/spark/src/main/scala/geotrellis/spark/io/GeoTiffInfoReader.scala
index ce7b108473..8cb45f6470 100644
--- a/spark/src/main/scala/geotrellis/spark/io/GeoTiffInfoReader.scala
+++ b/spark/src/main/scala/geotrellis/spark/io/GeoTiffInfoReader.scala
@@ -80,15 +80,16 @@ private [geotrellis] trait GeoTiffInfoReader extends LazyLogging {
           case DoubleCellType | DoubleConstantNoDataCellType | DoubleUserDefinedNoDataCellType(_) => 8
         }
       }
-      val (tileCols, tileRows, fileWindows) =
+      val fileWindows =
         RasterReader.listWindows(cols, rows, maxSize, segCols, segRows)
-      val windowBytes = tileCols * tileRows * depth
 
-      var currentBytes = 0
+      var currentBytes: Long = 0
       val currentPartition = mutable.ArrayBuffer.empty[GridBounds]
       val allPartitions = mutable.ArrayBuffer.empty[Array[GridBounds]]
 
       fileWindows.foreach({ gb =>
+        val windowBytes = gb.sizeLong * depth
+
         // Add the window to the present partition
         if (currentBytes + windowBytes <= partitionBytes) {
           currentPartition.append(gb)
diff --git a/spark/src/main/scala/geotrellis/spark/io/RasterReader.scala b/spark/src/main/scala/geotrellis/spark/io/RasterReader.scala
index debb878465..f3c8a7f246 100644
--- a/spark/src/main/scala/geotrellis/spark/io/RasterReader.scala
+++ b/spark/src/main/scala/geotrellis/spark/io/RasterReader.scala
@@ -74,12 +74,12 @@ object RasterReader {
   def listWindows(
     cols: Int, rows: Int, maxSize: Int,
     segCols: Int, segRows: Int
-  ): (Int, Int, Array[GridBounds]) = {
+  ): Array[GridBounds] = {
     val colSize: Int = if (maxSize >= segCols) segCols; else best(maxSize, segCols)
     val rowSize: Int = if (maxSize >= segRows) segRows; else best(maxSize, segRows)
     val windows = listWindows(cols, rows, colSize, rowSize)
 
-    (colSize, rowSize, windows)
+    windows
   }
 
   /** List all pixel windows that cover a grid of given size */
diff --git a/spark/src/main/scala/geotrellis/spark/io/hadoop/HadoopGeoTiffRDD.scala b/spark/src/main/scala/geotrellis/spark/io/hadoop/HadoopGeoTiffRDD.scala
index 853beac2fe..70ac785744 100644
--- a/spark/src/main/scala/geotrellis/spark/io/hadoop/HadoopGeoTiffRDD.scala
+++ b/spark/src/main/scala/geotrellis/spark/io/hadoop/HadoopGeoTiffRDD.scala
@@ -184,7 +184,6 @@ object HadoopGeoTiffRDD extends LazyLogging {
 
           RasterReader
             .listWindows(cols, rows, options.maxTileSize.getOrElse(1<<10), layout.tileCols, layout.tileRows)
-            ._3
             .map((objectRequest, _))
         }