Chaco Wash
Streamflow, conditions and background by watershed segment. Data through November 1, 2026.
Data gaps and disparities
Found automatically in the gauge records behind this river, and notes from a reviewer who checked them against other sources. Gauges need at least 26 weeks of daily data to appear on the Flow tab.
Warnings (0)
No warnings.
Context (7)
Show 7 notes
- single gauge Chaco: 57% of this segment's weeks rest on a single gauge; the segment value is that gauge in those weeks, and jumps when other gauges join or drop out.
- zero run Chaco Wash At Chaco Canyon National Monument, NM: 21 runs of 60+ days at zero flow; longest 306 days from Sep 21, 1988; 193 days from Feb 29, 1980. Usually real (a dry channel or no release), not missing data.
- flatline Chaco Wash At Eb At Chaco Canyon Natl Mon, NM: 1 run of 30+ days at exactly the same flow: 1.3 cfs for 36 days from Nov 23, 1982. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- zero run Chaco Wash At Eb At Chaco Canyon Natl Mon, NM: 5 runs of 60+ days at zero flow; longest 184 days from Sep 13, 1980; 169 days from Mar 26, 1980. Usually real (a dry channel or no release), not missing data.
- zero run Chaco Wash Nr Pb At Bridge At Chaco Natl Mon, NM: 5 runs of 60+ days at zero flow; longest 186 days from Sep 11, 1980; 166 days from Mar 27, 1980. Usually real (a dry channel or no release), not missing data.
- zero run Chaco Wash Nr Starlake Trading Post, NM: 9 runs of 60+ days at zero flow; longest 170 days from Sep 12, 1980; 122 days from Mar 28, 1982. Usually real (a dry channel or no release), not missing data.
- ended Discontinued gauges: 4 gauges have stopped reporting: Chaco Wash Nr Starlake Trading Post, NM (last 1982); Chaco Wash At Eb At Chaco Canyon Natl Mon, NM (last 1982); Chaco Wash Nr Pb At Bridge At Chaco Natl Mon, NM (last 1983); Chaco Wash At Chaco Canyon National Monument, NM (last 1990). Their segments rest on fewer gauges after those years.
Values removed (0)
A reading is removed automatically only when it is impossible (for example, a daily mean above the highest flow USGS recorded that water year). Low and zero flows are never removed: rivers here really do dry up.
None.
Gauges
Each row is one physical gauge; "published by" lists every agency copy that was merged into it.
| Gauge | Segment | Published by | First | Last | Weeks |
|---|---|---|---|---|---|
| Chaco Wash Nr Pb At Bridge At Chaco Natl Mon, NM | Chaco | usgs | 1980-03-24 | 1983-09-26 | 184 |
| Chaco Wash At Chaco Canyon National Monument, NM | Chaco | usgs | 1976-04-05 | 1990-04-30 | 735 |
| Chaco Wash At Eb At Chaco Canyon Natl Mon, NM | Chaco | usgs | 1980-03-24 | 1982-12-20 | 141 |
| Chaco Wash Nr Starlake Trading Post, NM | Chaco | usgs | 1977-10-03 | 1982-10-11 | 263 |