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Dolores Tunnel Outlet near Dolores

Transbasin diversion gage · DOLTUNCO · Division 7 · Water District 32 · Montezuma County

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

Source DWR administrative record · verify at DWR station ↗ 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 Dolores Tunnel moves water from Dolores River at McPhee Reservoir (Div 7, WD 71) into Montezuma Valley, McElmo Creek basin (Div 7, WD 32), operated by Montezuma Valley Irrigation Co. / USBR (Dolores Project) — 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
1985-08-14 → 2026-09-27
Daily values
14,940
Flowing now
4.95 cfs 2026-10-28 08:45, 1.2 h ago
Latest cached reading
6.8 cfs (2026-09-27)
Trend
no trend, 0.84 cfs/decade (0.8% 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 Dolores Tunnel Outlet near Dolores, water years 1985 to 2026. The measured record is no trend at 0.84 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 Dolores Tunnel, water carried across the Continental Divide. It is taken from Dolores River at McPhee Reservoir (Div 7, WD 71) and delivered to Montezuma Valley, McElmo Creek basin (Div 7, WD 32) — so what this gage reads leaves one river basin for good and arrives in another.

The two ends: Dolores Tunnel (source, on Dolores River); Dolores Tunnel (receiving, on Transbasin Water)

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 DOLTUNCO; recorded station name “DOLORES TUNNEL OUTLET NEAR DOLORES”; 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.