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North Boulder Creek at Silver Lake

River gage · NOBOSICO · USGS 06726000 · Division 1 · Water District 6 · Boulder 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
1913-07-31 → 1932-09-30
Daily values
8,648
Latest cached reading
7.0 cfs (1932-09-30)
Trend
no trend, 6.93 cfs/decade (21.9% of median)
Pettitt changepoint
~1919

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 North Boulder Creek at Silver Lake, water years 1913 to 1932. The measured record is no trend at 6.93 cubic feet per second per decade. A Pettitt changepoint is detected around 1919. 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 NOBOSICO; recorded station name “NORTH BOULDER CREEK AT SILVER LAKE, 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.