Hydrohistorian
Log in

← Basin trends ·  All gages in this district

Charles H. Boustead Tunnel

Transbasin diversion gage · BOUTUNCO · USGS 09077160 · Division 2 · Water District 11 · Lake County

Live gage at DWR ↗ · USGS monitoring location ↗ · Download daily record (CSV)

Source DWR administrative record · verify at DWR station ↗ Source Independent agency measurement · verify at USGS ↗ Source Our computation, no independent reference · computed here from the screened record

Two different numbers, deliberately: Flowing now is raw 15-minute telemetry, provisional and unreviewed. Latest cached reading is the end of the verified daily record. They are never merged, and the verified series is the one the trend is computed on.

What this gage meters

This is not a natural stream record. The Charles H. Boustead Tunnel moves water from Fryingpan River and Hunter Creek collection (Div 5) into Turquoise Lake, Arkansas River basin (Div 2), operated by Southeastern Colorado WCD / USBR (Fryingpan-Arkansas) — so this record is a ledger of those deliveries. Trends here reflect operational and demand decisions, not the basin's hydrology, and the basin trends page marks it accordingly (⇆). All of Colorado's curated transbasin diversions are collected at /transbasin.

The record

Period of record
1971-10-01 → 2026-09-27
Daily values
20,081
Flowing now
0.0 cfs 2026-10-14 17:15, 3.5 h ago
Latest cached reading
0.0 cfs (2026-09-27)
Trend
increasing, 6.14 cfs/decade (8.2% of median)

Readings come from the weekly-refreshed cache, never fetched live — the date beside the value says exactly how fresh it is. The live gage is one click up.

Annual flow & trend

Chart: annual mean flow at Charles H. Boustead Tunnel, water years 1971 to 2026. The measured record is increasing at 6.14 cubic feet per second per decade. The underlying yearly values are available as a CSV download linked at the top of this page.

Loading chart…

This gage measures the Charles H. Boustead Tunnel, water carried across the Continental Divide. It is taken from Fryingpan River and Hunter Creek collection (Div 5) and delivered to Turquoise Lake, Arkansas River basin (Div 2) — so what this gage reads leaves one river basin for good and arrives in another.

The two ends: Fry Ark Pr Boustead Tunnel (source, on Fryingpan River); Boustead Tunnel Outlet (receiving, on Lake Fork)

Decrees:

The ditch’s mapped channel is drawn on the map below where the USGS has surveyed it. Every crossing →

Where it sits

Location as DWR records it (5.0).

Provenance

DWR station abbreviation BOUTUNCO; recorded station name “CHARLES H. BOUSTEAD TUNNEL”; operated by DWR. Daily flows from the DWR HydroBase snapshot plus CDSS REST updates, refreshed on the weekly cycle. Trend statistics are Mann-Kendall (Hamed-Rao corrected) with Sen's slope in native cfs, the same numbers as the basin Trends tab.