diff --git a/disk/src/agg/binnedt.rs b/disk/src/agg/binnedt.rs
index c2b6e7f..495b6cf 100644
--- a/disk/src/agg/binnedt.rs
+++ b/disk/src/agg/binnedt.rs
@@ -3,7 +3,7 @@ use err::Error;
 use futures_core::Stream;
 use futures_util::StreamExt;
 use netpod::log::*;
-use netpod::{BinSpecDimT, BinnedRange};
+use netpod::BinnedRange;
 use std::pin::Pin;
 use std::task::{Context, Poll};
 
diff --git a/disk/src/aggtest.rs b/disk/src/aggtest.rs
index bd1d59c..88fa357 100644
--- a/disk/src/aggtest.rs
+++ b/disk/src/aggtest.rs
@@ -5,7 +5,7 @@ use crate::agg::binnedx::IntoBinnedXBins1;
 use crate::agg::make_test_node;
 use futures_util::StreamExt;
 use netpod::timeunits::*;
-use netpod::{BinSpecDimT, BinnedRange, Channel, ChannelConfig, NanoRange, Nanos, ScalarType, Shape};
+use netpod::{BinnedRange, Channel, ChannelConfig, NanoRange, Nanos, ScalarType, Shape};
 use std::future::ready;
 #[allow(unused_imports)]
 use tracing::{debug, error, info, trace, warn};
diff --git a/disk/src/binnedstream.rs b/disk/src/binnedstream.rs
index fb13b5c..d9232c5 100644
--- a/disk/src/binnedstream.rs
+++ b/disk/src/binnedstream.rs
@@ -5,8 +5,7 @@ use futures_core::Stream;
 use futures_util::StreamExt;
 #[allow(unused_imports)]
 use netpod::log::*;
-use netpod::{AggKind, BinSpecDimT, BinnedRange, Channel, NodeConfig, PreBinnedPatchIterator};
-use netpod::{NanoRange, RetStreamExt};
+use netpod::{AggKind, BinnedRange, Channel, NodeConfig, PreBinnedPatchIterator};
 use std::future::ready;
 use std::pin::Pin;
 use std::task::{Context, Poll};
diff --git a/disk/src/cache/pbv.rs b/disk/src/cache/pbv.rs
index cd2ba0c..5458ce9 100644
--- a/disk/src/cache/pbv.rs
+++ b/disk/src/cache/pbv.rs
@@ -10,7 +10,7 @@ use futures_core::Stream;
 use futures_util::{FutureExt, StreamExt, TryStreamExt};
 use netpod::log::*;
 use netpod::{
-    AggKind, BinSpecDimT, BinnedRange, Channel, NanoRange, NodeConfig, PreBinnedPatchCoord, PreBinnedPatchIterator,
+    AggKind, BinnedRange, Channel, NanoRange, NodeConfig, PreBinnedPatchCoord, PreBinnedPatchIterator,
     PreBinnedPatchRange,
 };
 use std::future::{ready, Future};
@@ -132,15 +132,6 @@ impl PreBinnedValueStream {
                 assert!(self.patch_coord.patch_t_len() % self.patch_coord.bin_t_len() == 0);
                 error!("try_setup_fetch_prebinned_higher_res  apply all requested transformations and T-binning");
                 let count = self.patch_coord.patch_t_len() / self.patch_coord.bin_t_len();
-                // TODO use a ctor, remove from BinSpecDimT the redundant variable.
-                // If given a timestamp range, verify that it divides.
-                // For ranges, use a range type.
-                let _spec = BinSpecDimT {
-                    bs: self.patch_coord.bin_t_len(),
-                    ts1: self.patch_coord.patch_beg(),
-                    ts2: self.patch_coord.patch_end(),
-                    count,
-                };
                 let range = BinnedRange::covering_range(evq.range.clone(), count).unwrap();
                 let s1 = MergedFromRemotes::new(evq, self.node_config.cluster.clone());
                 let s2 = s1
diff --git a/netpod/src/lib.rs b/netpod/src/lib.rs
index 5d4bd11..43668a2 100644
--- a/netpod/src/lib.rs
+++ b/netpod/src/lib.rs
@@ -3,7 +3,6 @@ use err::Error;
 use futures_core::Stream;
 use futures_util::StreamExt;
 use serde::{Deserialize, Serialize};
-use std::collections::BTreeMap;
 use std::path::PathBuf;
 use std::pin::Pin;
 use std::task::{Context, Poll};
@@ -217,54 +216,6 @@ pub mod timeunits {
     pub const WEEK: u64 = DAY * 7;
 }
 
-pub struct BinSpecDimT {
-    pub count: u64,
-    pub ts1: u64,
-    pub ts2: u64,
-    pub bs: u64,
-}
-
-impl BinSpecDimT {
-    pub fn over_range(count: u64, ts1: u64, ts2: u64) -> Self {
-        use timeunits::*;
-        assert!(count >= 1);
-        assert!(count <= 2000);
-        assert!(ts2 > ts1);
-        let dt = ts2 - ts1;
-        assert!(dt <= DAY * 14);
-        let bs = dt / count;
-        let mut i1 = 0;
-        let bs = loop {
-            if i1 >= BIN_THRESHOLDS.len() {
-                break *BIN_THRESHOLDS.last().unwrap();
-            }
-            let t = BIN_THRESHOLDS[i1];
-            if bs <= t {
-                break t;
-            }
-            i1 += 1;
-        };
-        //info!("INPUT TS  {}  {}", ts1, ts2);
-        //info!("chosen binsize: {}  {}", i1, bs);
-        let ts1 = ts1 / bs * bs;
-        let ts2 = (ts2 + bs - 1) / bs * bs;
-        //info!("ADJUSTED TS  {}  {}", ts1, ts2);
-        BinSpecDimT {
-            count: (ts2 - ts1) / bs,
-            ts1,
-            ts2,
-            bs,
-        }
-    }
-
-    pub fn get_range(&self, ix: u32) -> NanoRange {
-        NanoRange {
-            beg: self.ts1 + ix as u64 * self.bs,
-            end: self.ts1 + (ix as u64 + 1) * self.bs,
-        }
-    }
-}
-
 const BIN_T_LEN_OPTIONS: [u64; 6] = [SEC * 10, MIN * 10, HOUR, HOUR * 4, DAY, DAY * 4];
 
 const PATCH_T_LEN_OPTIONS: [u64; 6] = [MIN * 10, HOUR, HOUR * 4, DAY, DAY * 4, DAY * 12];