Hydrohistorian
Grand River Ditch at La Poudre Pass
Transbasin diversion gage · GRNDRDCO · USGS 09010000 · Division 1 · Water District 3 · Larimer County
Live gage at DWR ↗ · USGS monitoring location ↗ · Download daily record (CSV)
What this gage meters
This is not a natural stream record. The Grand River Ditch moves water from Colorado River headwaters at La Poudre Pass (Div 5) into Cache la Poudre River via Long Draw (Div 1), operated by Water Supply & Storage Co. — 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 GRNDRDCO; recorded station name “GRAND RIVER DITCH AT LA POUDRE PASS”; 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.