Hydrohistorian
Gunnison River below Gunnison Tunnel
Transbasin diversion gage · GUNBEPCO · USGS 09128000 · Division 4 · Water District 62 · Montrose County
Live gage at DWR ↗ · USGS monitoring location ↗ · Download daily record (CSV)
What this gage meters
This is not a natural stream record. The Gunnison Tunnel moves water from Gunnison River in the Black Canyon (Div 4, WD 62) into Uncompahgre Valley via the South Canal (Div 4, WD 68), operated by Uncompahgre Valley Water Users Assn. / USBR — 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
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
Where it sits
Location as DWR records it (5.0).
Provenance
DWR station abbreviation GUNBEPCO; recorded station name “GUNNISON RIVER BELOW GUNNISON TUNNEL, CO”; operated by USGS. 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.