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Union Reservoir

Reservoir gage · UNIRESCO · Division 1 · Water District 5 · Boulder County

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

The record

Period of record
2010-05-30 → 2025-07-15
Daily values
5,434
Latest cached reading
5.1 cfs (2025-07-15)
Trend
no trend, 3.65 cfs/decade (31.7% of median)

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 (3.0).

Provenance

DWR station abbreviation UNIRESCO; recorded station name “UNION RESERVOIR”; operated by NWSDR. 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.