Conejos River
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 (1)
- warning: gap Conejos River Near Mogote, CO: 1 gap of 60+ days inside the record (2,252 days in all). Longest: Nov 1, 1905 to Dec 31, 1911 (2,252 days).
Context (16)
Show 16 notes
- flatline Conejos R At Counsellors Cabin, Near Mogote, CO: 9 runs of 30+ days at exactly the same flow: 43.0 cfs for 59 days from Jan 1, 1945; 36.0 cfs for 31 days from Dec 1, 1943; 37.0 cfs for 31 days from Jan 1, 1944. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- flatline Conejos River At Platoro, CO: 53 runs of 30+ days at exactly the same flow: 6.0 cfs for 90 days from Dec 1, 1944; 6.0 cfs for 62 days from Dec 1, 1943; 6.0 cfs for 62 days from Dec 1, 1945. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- flatline Conejos River Below Platoro Reservoir, CO: 100 runs of 30+ days at exactly the same flow: 10.0 cfs for 175 days from Nov 1, 1974; 8.1 cfs for 173 days from Oct 23, 2008; 17.0 cfs for 170 days from Nov 10, 1957. Below a dam this is usually a steady set release, which is real flow.
- flatline Conejos River Near Conejos: 4 runs of 30+ days at exactly the same flow: 70.6 cfs for 60 days from Jan 15, 2022; 110.0 cfs for 44 days from Dec 16, 2018; 107.0 cfs for 40 days from Jan 31, 2019. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- gap Conejos River Near Conejos: 15 gaps of 60+ days inside the record (1,511 days in all). Longest: Nov 21, 2000 to Apr 17, 2001 (148 days); Dec 2, 2002 to Mar 30, 2003 (119 days); Nov 19, 2015 to Mar 14, 2016 (117 days).
- zero run Conejos River Near Conejos: 5 runs of 60+ days at zero flow; longest 118 days from Dec 2, 2006; 117 days from Dec 16, 2009. Usually real (a dry channel or no release), not missing data.
- gap Conejos River Near Manassa: 2 gaps of 60+ days inside the record (290 days in all). Longest: Oct 2, 2018 to Mar 26, 2019 (176 days); Dec 9, 2024 to Apr 1, 2025 (114 days).
- zero run Conejos River Near Manassa: 2 runs of 60+ days at zero flow; longest 87 days from Jul 4, 2026; 67 days from Aug 6, 2025. Usually real (a dry channel or no release), not missing data.
- copy disagree Conejos River Near Mogote, CO: The usace_cwms copy agrees on the median but differs by more than 10% on 27% of 6,724 shared days (often provisional vs approved data, or a different daily averaging window). The report does not use usace_cwms for this gauge.
- flatline Conejos River Near Mogote, CO: 52 runs of 30+ days at exactly the same flow: 40.0 cfs for 63 days from Dec 28, 1921; 55.0 cfs for 62 days from Dec 1, 1913; 50.0 cfs for 59 days from Jan 1, 1919. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- ended Discontinued gauges: 2 gauges have stopped reporting: Conejos R At Counsellors Cabin, Near Mogote, CO (last 1947); Conejos River At Platoro, CO (last 1953). Their segments rest on fewer gauges after those years.
- copy disagree South Channel Conejos River Near La Sauses: The codwr copy agrees on the median but differs by more than 10% on 35% of 527 shared days (often provisional vs approved data, or a different daily averaging window). The report takes 8,076 days from codwr where usace_cwms is missing, so the level can shift there.
- fallback South Channel Conejos River Near La Sauses: 24% of days come from usbr_hydrodata; codwr 55%, usace_cwms 21% fill days usbr_hydrodata does not cover, so the source changes within the record.
- flatline South Channel Conejos River Near La Sauses: 3 runs of 30+ days at exactly the same flow: 4.7 cfs for 48 days from Dec 29, 2018; 2.4 cfs for 40 days from Dec 18, 2020; 13.5 cfs for 38 days from Jan 23, 2010. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- gap South Channel Conejos River Near La Sauses: 3 gaps of 60+ days inside the record (255 days in all). Longest: Dec 20, 1985 to Apr 23, 1986 (125 days); Jan 5, 1988 to Mar 14, 1988 (70 days); Aug 5, 1989 to Oct 3, 1989 (60 days).
- zero run South Channel Conejos River Near La Sauses: 23 runs of 60+ days at zero flow; longest 204 days from Jul 14, 2005; 179 days from May 29, 2002. Usually real (a dry channel or no release), not missing data.
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 |
|---|---|---|---|---|---|
| South Channel Conejos River Near La Sauses | Conejos | codwr, usace_cwms, usbr_hydrodata | 1985-04-15 | 2026-10-26 | 2104 |
| Conejos River At Platoro, CO | Conejos | codwr, usgs | 1936-09-28 | 1953-09-21 | 887 |
| Conejos River Near Conejos | Conejos | codwr | 1999-03-08 | 2026-10-26 | 1195 |
| Conejos R At Counsellors Cabin, Near Mogote, CO | Conejos | codwr, usgs | 1943-10-04 | 1947-09-22 | 208 |
| Conejos River Below Platoro Reservoir, CO | Conejos | codwr, usace_cwms, usgs | 1952-06-02 | 2026-10-26 | 3883 |
| Conejos River Near Mogote, CO | Conejos | codwr, nwps, usace_cwms, usbr_hydrodata, usgs | 1903-03-30 | 2026-10-26 | 6127 |
| Conejos River Near Manassa | Conejos | codwr | 2019-03-25 | 2026-10-26 | 380 |