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Big Thompson River above Lake Estes

River gage · BTABESCO · USGS 06733000 · Division 1 · Water District 4 · Larimer County

Live gage at DWR ↗ · USGS monitoring location ↗ · Download daily record (CSV)

The record

Period of record
1946-09-30 → 2026-08-15
Daily values
33,013
Latest cached reading
62.5 cfs (2026-08-15)
Trend
decreasing, -4.38 cfs/decade (-3.4% of median)
Pettitt changepoint
~1965

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

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Where it sits

Location as DWR records it (5.0).

Provenance

DWR station abbreviation BTABESCO; recorded station name “BIG THOMPSON RIVER ABOVE LAKE ESTES”; operated by NWBOR. 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.