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Colorado River at Glenwood Springs

River gage · COLAGSCO · USGS 09072500 · Division 5 · Water District 53 · Garfield 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

The record

Period of record
1899-10-01 → 1966-09-30
Daily values
24,471
Latest cached reading
1120.0 cfs (1966-09-30)
Trend
decreasing, -201.33 cfs/decade (-7.6% of median)
Pettitt changepoint
~1930

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 Colorado River at Glenwood Springs, water years 1899 to 1966. The measured record is decreasing at -201.33 cubic feet per second per decade. A Pettitt changepoint is detected around 1930. The underlying yearly values are available as a CSV download linked at the top of this page.

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Where it sits

Location as DWR records it (5).

Provenance

DWR station abbreviation COLAGSCO; recorded station name “COLORADO RIVER AT GLENWOOD SPRINGS, 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.