Hydrohistorian
Guanella Reservoir (Outflow)
Reservoir gage · GUAOUTCO · Division 1 · Water District 7 · Clear Creek County
The record
Period of record
2005-06-13 → 2026-08-09
Daily values
7,707
Latest cached reading
9.3 cfs (2026-08-09)
Trend
increasing, 2.61 cfs/decade (64.5% of median)
Pettitt changepoint
~2014
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
Loading chart…
Where it sits
Location as DWR records it (gps).
Provenance
DWR station abbreviation GUAOUTCO; recorded station name “GUANELLA RESERVOIR (OUTFLOW)”; 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.