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Rio Grande Floodway at San Marcial, Nm

River gage · SMFRIONM · USGS 08358400 · Division 3 · Water District 20

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

The record

Period of record
1949-10-01 → 2026-07-06
Daily values
28,038
Latest cached reading
0.0 cfs (2026-07-06)
Trend
no trend, 29.86 cfs/decade (7.3% of median)
Pettitt changepoint
~1974

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 SMFRIONM; recorded station name “RIO GRANDE FLOODWAY AT SAN MARCIAL, NM”; 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.