Costilla Creek
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 (6)
- warning: seasonal Costilla Cr Bel Div At Costilla, NM: No record in Nov–Mar most years: the gauge reports seasonally, so yearly and some monthly means are missing or cover only part of the year.
- warning: gap Costilla Creek Above Costilla Dam, NM: 28 gaps of 60+ days inside the record (6,339 days in all). Longest: Sep 30, 1946 to Sep 30, 1947 (366 days); Oct 1, 1940 to Jun 30, 1941 (273 days); Oct 1, 1939 to May 31, 1940 (244 days).
- warning: seasonal Costilla Creek Above Costilla Dam, NM: No record in Nov–Mar most years: the gauge reports seasonally, so yearly and some monthly means are missing or cover only part of the year.
- warning: gap Costilla Creek Near Amalia, NM: 4 gaps of 60+ days inside the record (1,215 days in all). Longest: Sep 30, 1959 to Apr 22, 1961 (571 days); Oct 1, 1967 to May 7, 1968 (220 days); Oct 1, 1952 to Apr 30, 1953 (212 days).
- warning: seasonal Costilla Creek Near Amalia, NM: No record in Nov–Mar most years: the gauge reports seasonally, so yearly and some monthly means are missing or cover only part of the year.
- warning: seasonal Costilla Creek Near Garcia, CO: No record in Nov–Mar most years: the gauge reports seasonally, so yearly and some monthly means are missing or cover only part of the year.
Context (8)
Show 8 notes
- flatline Costilla Creek Below Costilla Dam, NM: 5 runs of 30+ days at exactly the same flow: 1.7 cfs for 79 days from Dec 27, 1944; 3.0 cfs for 55 days from Jan 5, 1950; 8.4 cfs for 38 days from Sep 30, 1939. Below a dam this is usually a steady set release, which is real flow.
- gap Costilla Creek Below Costilla Dam, NM: 48 gaps of 60+ days inside the record (8,715 days in all). Longest: Oct 1, 1937 to May 31, 1938 (243 days); Oct 5, 2010 to May 11, 2011 (219 days); Oct 24, 1940 to May 28, 1941 (217 days).
- zero run Costilla Creek Below Costilla Dam, NM: 5 runs of 60+ days at zero flow; longest 226 days from Nov 2, 1951; 190 days from Oct 7, 1964. Usually real (a dry channel or no release), not missing data.
- flatline Costilla Creek Near Costilla, NM: 1 run of 30+ days at exactly the same flow: 15.0 cfs for 53 days from Jan 1, 1950. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- gap Costilla Creek Near Costilla, NM: 6 gaps of 60+ days inside the record (957 days in all). Longest: Oct 16, 1937 to May 8, 1938 (205 days); Oct 10, 1936 to Apr 9, 1937 (182 days); Nov 1, 1940 to Apr 15, 1941 (166 days).
- gap Costilla Creek Near Garcia, CO: 2 gaps of 60+ days inside the record (428 days in all). Longest: Oct 7, 2010 to May 10, 2011 (216 days); Oct 1, 1988 to Apr 30, 1989 (212 days).
- zero run Costilla Creek Near Garcia, CO: 10 runs of 60+ days at zero flow; longest 173 days from Apr 10, 2026; 118 days from Jul 19, 2025. Usually real (a dry channel or no release), not missing data.
- ended Discontinued gauges: 2 gauges have stopped reporting: Costilla Creek Near Amalia, NM (last 1981); Costilla Cr Bel Div At Costilla, NM (last 1986). 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 |
|---|---|---|---|---|---|
| Costilla Creek Below Costilla Dam, NM | Upper Rio Grande | codwr, usgs | 1937-04-12 | 2026-10-19 | 3425 |
| Costilla Creek Near Garcia, CO | Upper Rio Grande | codwr, usgs | 1965-10-04 | 2026-10-19 | 1631 |
| Costilla Creek Near Costilla, NM | Upper Rio Grande | codwr, nwps, usgs | 1936-03-09 | 2026-10-26 | 4594 |
| Costilla Creek Above Costilla Dam, NM | Upper Rio Grande | codwr, usgs | 1937-05-03 | 2026-10-19 | 2125 |
| Costilla Creek Near Amalia, NM | Upper Rio Grande | usgs | 1949-05-16 | 1981-09-28 | 793 |
| Costilla Cr Bel Div At Costilla, NM | Upper Rio Grande | usgs | 1964-09-28 | 1986-10-06 | 557 |