Hydrohistorian
Log in

← Basin trends ·  All gages in this district

Blue River at Dillon

River gage · BLUADICO · USGS 09047000 · Division 5 · Water District 36 · Summit 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
1910-10-01 → 1961-04-30
Daily values
18,475
Latest cached reading
37.0 cfs (1961-04-30)
Trend
decreasing, -7.76 cfs/decade (-7.1% 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 Blue River at Dillon, water years 1910 to 1961. The measured record is decreasing at -7.76 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.

Loading chart…

Where it sits

Location as DWR records it (5).

Provenance

DWR station abbreviation BLUADICO; recorded station name “BLUE RIVER AT DILLON, 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.