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Big Thompson River Bl Powerhouse, near Drake

River gage · BTBLOVCO · USGS 06736500 · Division 1 · Water District 4 · Larimer 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
1917-09-30 → 1985-09-30
Daily values
32,742
Latest cached reading
62.0 cfs (1985-09-30)
Trend
decreasing, -18.21 cfs/decade (-13.3% of median)
Pettitt changepoint
~1953

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 Big Thompson River Bl Powerhouse, near Drake, water years 1917 to 1985. The measured record is decreasing at -18.21 cubic feet per second per decade. A Pettitt changepoint is detected around 1953. 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 (5.0).

Provenance

DWR station abbreviation BTBLOVCO; recorded station name “BIG THOMPSON RIVER BL POWERHOUSE, NR DRAKE, 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.