The monitoring network within this area

Hydrionis holds 1,741 values from 5 gauges within it. Discharge is a property of a gauge and its reach, not of this drainage area, so this page reports the network and its records rather than a single figure.

5

Gauges

1,741

Values held

1903–2026

Record spans

Gauges within the Conejos huc8 subbasin

5 monitoring points, positioned as the publisher records them.

Flood peaks, as measured

This gauge's flood record, as measured. Unlike a daily mean it is the discharge at the moment the river was highest, which is the figure flood frequency analysis is built on.

Largest measured flow of each year at CONEJOS RIVER NEAR MOGOTE, CO.

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1903–2024.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

Published by the gauge's own operator from its sub-daily record; Hydrionis stores the figure rather than recomputing it. A year the gauge did not cover produces no value rather than a low one, and the gaps are stated below the chart. A peak is a property of this gauge and its reach: a larger flood upstream or downstream of it is not in this series.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

Underlying data
Period	CONEJOS RIVER NEAR MOGOTE, CO. (m³/s)
1903	98.3
1904	61.2
1905	146
1911	255
1915	79.6
1916	88.6
1917	94.6
1918	67.7
1919	73.3
1920	131
1921	88.3
1922	104
1923	99.4
1924	76.5
1925	50.1
1926	74.2
1927	131
1928	75.3
1929	78.7
1930	58.3
1931	50.1
1932	85.2
1933	84.4
1934	37.1
1935	104
1936	68.0
1937	92.3
1938	92.9
1939	47.6
1940	46.7
1941	106
1942	78.7
1943	51.8
1944	81.8
1945	61.4
1946	52.7
1947	60.6
1948	100.0
1949	96.6
1950	42.2
1951	56.1
1952	76.5
1953	56.6
1954	34.5
1955	45.3
1956	52.7
1957	82.7
1958	59.5
1959	41.3
1960	64.6
1961	64.3
1962	61.7
1963	43.3
1964	76.7
1965	80.4
1966	58.3
1967	54.7
1968	63.7
1969	63.7
1970	56.9
1971	37.4
1972	25.0
1973	80.4
1974	48.4
1975	65.7
1976	59.5
1977	25.5
1978	64.8
1979	73.3
1980	79.0
1981	44.5
1982	70.2
1983	72.5
1984	79.9
1985	82.7
1986	73.6
1987	56.9
1988	42.2
1989	45.6
1990	49.8
1991	54.7
1992	62.6
1993	63.1
1994	68.2
1995	65.4
1996	47.6
1997	69.9
1998	49.6
1999	52.7
2000	41.1
2001	56.6
2002	12.5
2003	46.4
2004	50.7
2005	74.8
2006	48.7
2007	40.2
2008	66.5
2009	56.1
2010	66.0
2011	52.4
2012	31.4
2013	36.0
2014	61.2
2015	55.5
2016	60.6
2017	58.0
2018	40.2
2019	63.1
2020	40.8
2021	39.4
2022	51.8
2023	55.8
2024	41.3

About this series

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Measured
Period held	1903–2024
Completeness	93.4% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	2 separate periods inside 1903–2024 hold no value. The longest runs from 1906 to 1910 — 5 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1903 and is not continuous from it: 122 years separate the first value from the last, and 93% of the years between them are held. The span is not the record.
Last read from the publisher	2026-10-01
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

How much of the rain came back out

A discharge in cubic metres per second cannot be compared with anything: the larger number may only mean the larger catchment. Divided by the area draining to the gauge it becomes a depth of water over that land, which answers a question a reader already has — of the rain that fell here, how much came back out as river?

Water leaving the catchment above CONEJOS RIVER NEAR MOGOTE, CO., as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1904–2023.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

Computed by Hydrionis from the published annual mean flow and the catchment area the station's own publisher states. It is not a water balance: the difference between rainfall and runoff is not evaporation alone but also change in groundwater storage, water abstracted and taken elsewhere, and water imported by transfer schemes — which is why a catchment can yield more runoff than the rain that fell on it without anything being measured wrongly. A different area figure rescales every value here by the ratio between them.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

Underlying data
Period	CONEJOS RIVER NEAR MOGOTE, CO. (mm)
1904	260
1912	521
1913	264
1914	429
1915	403
1916	622
1917	546
1918	383
1919	416
1920	726
1921	438
1922	518
1923	634
1924	480
1925	394
1926	420
1927	582
1928	323
1929	573
1930	346
1931	254
1932	604
1933	367
1934	176
1935	506
1936	391
1937	525
1938	542
1939	277
1940	271
1941	678
1942	437
1943	332
1944	498
1945	404
1946	254
1947	371
1948	476
1949	488
1950	281
1951	205
1952	632
1953	273
1954	229
1955	229
1956	280
1957	597
1958	385
1959	263
1960	354
1961	343
1962	440
1963	201
1964	273
1965	565
1966	374
1967	354
1968	410
1969	460
1970	398
1971	288
1972	219
1973	479
1974	272
1975	501
1976	333
1977	132
1978	301
1979	515
1980	495
1981	225
1982	531
1983	458
1984	418
1985	635
1986	580
1987	439
1988	274
1989	315
1990	276
1991	403
1992	303
1993	461
1994	406
1995	533
1996	287
1997	475
1998	326
1999	377
2000	209
2001	347
2002	93.0
2003	222
2004	333
2005	496
2006	327
2007	344
2008	444
2009	391
2010	335
2011	335
2012	228
2013	205
2014	291
2015	304
2016	352
2017	497
2018	218
2019	499
2020	231
2021	288
2022	335
2023	446

About this series

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Derived Computed by Hydrionis
Period held	1904–2023
Completeness	94.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1904–2023 holds no value: 1905 to 1911, 7 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1904 and is not continuous from it: 120 years separate the first value from the last, and 94% of the years between them are held. The span is not the record.
Inputs last read	2026-10-01 · when the records this was computed from were last read from their publishers
Calculation date	2026-08-24 · when the calculation method was last versioned, not a reading of any publisher
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

The snow standing above this water

1 automated snow station sits inside this drainage area, weighing the snowpack rather than measuring how deep it is.

364

Fullest snowpack recorded at San Antonio Sink, in 2017 (mm of water)

93

Thinnest, in 2026 (mm of water)

March

Month the pack is usually at its fullest

May

Month the pack has gone by, in half of years

Peak snowpack at San Antonio Sink

Water years 2012–2026. Each point is the fullest month of that snow season.

A water year runs October to September and is named for the year it ends, so the snow of one winter stays in one point. The value is the fullest month, not the fullest day: a pack that peaked sharply mid-month reads lower here than a single measurement taken at the right moment would.

View the data behind this chart

Underlying data
Period	San Antonio Sink (mm)
2012	181
2013	141
2014	187
2015	202
2016	219
2017	364
2018	99.0
2019	291
2020	154
2021	191
2022	260
2023	255
2024	239
2025	136
2026	93.0

Read against the river

San Antonio Sink and CONEJOS RIVER NEAR MOGOTE, CO. both sit in this drainage area, and their records overlap by 12 years. That is the span the two have in common, not a count of years both actually hold — either record may have gaps inside it. The two are shown separately rather than on one axis: millimetres of stored water and cubic metres per second are not commensurable, and a difference between them would mean nothing.

Being in the same drainage area does not put the snowpack upstream of the gauge. A subbasin is an area, and snow on one tributary can join the river below a gauge on another — so a weak relationship here may say more about which tributary was measured than about the snow.

Every gauge Hydrionis holds within this area

Gauges within the Conejos and what each holds
Gauge	Measures	Values	Record
CONEJOS RIVER NEAR MOGOTE, CO.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	378	1903–2026
LOS PINOS RIVER NEAR ORTIZ, CO	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	354	1915–2026
CONEJOS RIVER NEAR LASAUSES, CO	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	311	1921–2026
SAN ANTONIO RIVER AT ORTIZ, CO	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	305	1920–2026
SAN ANTONIO RIVER AT MOUTH, NEAR MANASSA, CO.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	211	1923–2026

How these gauges were attached to this water

Assigned by the publisher to a numbered basin Every gauge here is assigned to this drainage area by its own publisher, which issues the area an official code — 13010005. A drainage area is not a river: it contains the tributaries as well as the main channel, and a gauge in it may be on any of them.

What each gauge’s link to this water rests on
Gauge	Evidence	Established
CONEJOS RIVER NEAR MOGOTE, CO.	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
LOS PINOS RIVER NEAR ORTIZ, CO	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
CONEJOS RIVER NEAR LASAUSES, CO	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
SAN ANTONIO RIVER AT ORTIZ, CO	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
SAN ANTONIO RIVER AT MOUTH, NEAR MANASSA, CO.	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02

What this record holds

Hydrionis decides which waters get a page, and which of those are offered to search, from what is actually held rather than from how the page reads. Five signals are counted; this record has 5 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	5	yes, 3 or more
Years spanned	124	yes, 20 or more
Values held	1,741	yes, 1000 or more
Distinct measurements	6	yes, 2 or more
Publishers measuring it	2	yes, 2 or more
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/gauge-usgs-08246500.json
How to cite this, and who you must credit
How these figures were produced
Request this at a different scale, format or geography

No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.

Attribution and citation

Suggested citation for Hydrionis

Hydrionis (2026), Conejos gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-conejos/

Cite Hydrionis where you rely on values Hydrionis computed, on the method that produced them, or on the compilation itself. The underlying measurements remain the publishers’ and their attribution requirements apply to you directly.

Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the Conejos gauge records changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.

None of the contributing licences requires attribution. Crediting the publishers is still good practice and they are listed above.

Where these figures come from

MeasuredHigh confidence2024-06-01

Source: USGS — National Water Information System, USGS site 08246500, annual peak streamflow. Licence: Open.

Method: The instantaneous maximum discharge of each water year as published by USGS, dated to the day it occurred. One value per October-to-September water year; where the publisher lists both a systematic and a historic peak for a year, the larger is the annual maximum. Values the publisher marks as maximum daily averages are not held here, because they are not instantaneous peaks. Values marked as bounded rather than measured are held as censored observations carrying the bound. Cubic feet per second are converted to cubic metres per second and the publisher unit is recorded alongside.

Rating curves are extrapolated at extreme discharges, so the largest values in a peak series carry the largest measurement uncertainty. Data from the U.S. Geological Survey National Water Information System, a work of the United States government and therefore in the public domain.

Retrieved 1 October 2026.