Navajo 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 (3)
- warning: peak conflict Navajo R At Banded Peak Ranch, Near Chromo, CO: 13 approved USGS daily values exceed that water year's USGS annual peak, in water year 1984 (e.g. 1,080 cfs on May 24, 1984 against a peak of 670). A day's mean cannot exceed the year's peak, so one of the two USGS records is wrong for those years; the daily values are kept.
- warning: gap Navajo River Above Chromo, CO: 1 gap of 60+ days inside the record (6,531 days in all). Longest: Nov 14, 1938 to Sep 30, 1956 (6,531 days).
- warning: gap Navajo River At Edith, CO: 5 gaps of 60+ days inside the record (4,383 days in all). Longest: Oct 1, 1928 to Sep 30, 1935 (2,556 days); Oct 1, 1918 to Sep 30, 1920 (731 days); Oct 1, 1923 to Sep 30, 1924 (366 days).
Context (7)
Show 7 notes
- ended Discontinued gauges: 2 gauges have stopped reporting: Navajo River Above Chromo, CO (last 1970); Navajo River At Edith, CO (last 1996). Their segments rest on fewer gauges after those years.
- fallback Navajo R At Banded Peak Ranch, Near Chromo, CO: 65% of days come from usgs; codwr 35% fill days usgs does not cover, so the source changes within the record.
- flatline Navajo R At Banded Peak Ranch, Near Chromo, CO: 10 runs of 30+ days at exactly the same flow: 35.0 cfs for 59 days from Feb 1, 1937; 25.0 cfs for 59 days from Jan 1, 1943; 55.0 cfs for 31 days from Oct 1, 1936. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- fallback Navajo River Above Chromo, CO: 82% of days come from usgs; codwr 18% fill days usgs does not cover, so the source changes within the record.
- flatline Navajo River Above Chromo, CO: 2 runs of 30+ days at exactly the same flow: 35.0 cfs for 44 days from Dec 19, 1961; 30.0 cfs for 33 days from Dec 20, 1935. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- flatline Navajo River At Edith, CO: 27 runs of 30+ days at exactly the same flow: 31.0 cfs for 72 days from Oct 1, 1924; 45.0 cfs for 59 days from Jan 1, 1921; 35.0 cfs for 59 days from Jan 1, 1943. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- fallback Navajo River Bl Oso Diversion Dam Nr Chromo, CO: 50% of days come from usgs; codwr 50%, nwps 0% fill days usgs does not cover, so the source changes within the record.
Values removed (13)
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.
Show 13 removed values
| Gauge | Date | Source | cfs | Why |
|---|---|---|---|---|
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-12 | codwr | 714 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-14 | codwr | 736 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-22 | codwr | 816 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-23 | codwr | 920 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-24 | codwr | 1080 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-25 | codwr | 1040 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-26 | codwr | 940 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-27 | codwr | 880 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-28 | codwr | 840 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-29 | codwr | 820 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-30 | codwr | 800 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-05-31 | codwr | 780 | automatic: daily mean above that water year's USGS peak of 670 cfs |
| Navajo R At Banded Peak Ranch, Near Chromo, CO | 1984-06-01 | codwr | 760 | automatic: daily mean above that water year's USGS peak of 670 cfs |
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 |
|---|---|---|---|---|---|
| Navajo R At Banded Peak Ranch, Near Chromo, CO | Upper San Juan | codwr, usgs | 1936-09-28 | 2026-10-19 | 4700 |
| Navajo River Above Chromo, CO | Upper San Juan | codwr, usgs | 1935-09-30 | 1970-09-21 | 893 |
| Navajo River Bl Oso Diversion Dam Nr Chromo, CO | Upper San Juan | codwr, nwps, usgs | 1971-03-01 | 2026-10-26 | 2905 |
| Navajo River At Edith, CO | Upper San Juan | codwr, usgs | 1912-09-30 | 1996-05-06 | 3736 |