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Arkansas River at Portland

River gage · ARKPORCO · USGS 07097000 · Division 2 · Water District 12 · Fremont County

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

The record

Period of record
1939-06-01 → 2026-07-06
Daily values
23,777
Latest cached reading
68.9 cfs (2026-07-06)
Trend
no trend, -14.46 cfs/decade (-2.1% 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 (5.0).

Provenance

DWR station abbreviation ARKPORCO; recorded station name “ARKANSAS RIVER AT PORTLAND, CO.”; 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.