The monitoring network within this area

Hydrionis holds 1,536 values from 2 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.

2

Gauges

1,536

Values held

1910–2026

Record spans

Gauges within the Eagle huc8 subbasin

2 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 EAGLE RIVER AT RED CLIFF, CO.

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1911–2025.

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	EAGLE RIVER AT RED CLIFF, CO. (m³/s)
1911	25.5
1912	28.6
1913	12.2
1914	22.7
1915	14.4
1916	16.5
1917	20.0
1918	19.4
1919	10.8
1920	19.4
1921	21.2
1922	11.7
1923	17.2
1924	13.6
1925	9.20
1944	7.79
1945	5.69
1946	7.42
1947	10.7
1948	18.5
1949	12.3
1950	10.6
1951	14.4
1952	17.8
1953	17.8
1954	3.82
1955	3.74
1956	10.5
1957	20.2
1958	15.0
1959	6.63
1960	12.5
1961	4.81
1962	10.3
1963	2.83
1964	9.34
1965	9.91
1966	3.54
1967	5.55
1968	11.6
1969	8.52
1970	8.64
1971	8.41
1972	5.95
1973	11.8
1974	11.8
1975	11.8
1976	7.90
1977	3.31
1978	13.5
1979	19.1
1980	10.1
1981	2.80
1982	7.22
1983	16.6
1984	24.0
1985	8.44
1986	8.52
1987	7.11
1988	4.81
1989	5.49
1990	7.11
1991	6.00
1992	4.64
1993	13.6
1994	5.61
1995	18.5
1996	15.6
1997	15.1
1998	5.10
1999	9.49
2000	10.1
2001	5.61
2002	1.36
2003	11.9
2004	2.80
2005	6.23
2006	7.76
2007	5.86
2008	16.1
2009	9.57
2010	10.00
2011	16.3
2012	1.36
2013	5.92
2014	16.3
2015	12.0
2016	7.48
2017	7.25
2018	4.59
2019	12.0
2020	6.20
2021	2.61
2022	4.73
2023	5.27
2024	7.39
2025	4.47

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	1911–2025
Completeness	84.3% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1911–2025 holds no value: 1926 to 1943, 18 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1911 and is not continuous from it: 115 years separate the first value from the last, and 84% 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 EAGLE RIVER AT RED CLIFF, 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. 1911–2025.

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	EAGLE RIVER AT RED CLIFF, CO. (mm)
1911	412
1912	449
1913	271
1914	393
1915	229
1916	354
1917	347
1918	435
1919	277
1920	355
1921	389
1922	241
1923	348
1924	278
1945	205
1946	192
1947	297
1948	294
1949	245
1950	208
1951	265
1952	290
1953	192
1954	98.0
1955	115
1956	176
1957	313
1958	210
1959	173
1960	219
1961	146
1962	251
1963	115
1964	151
1965	245
1966	120
1967	143
1968	175
1969	174
1970	231
1971	215
1972	156
1973	195
1974	222
1975	222
1976	146
1977	94.0
1978	233
1979	262
1980	165
1981	83.0
1982	203
1983	299
1984	415
1985	232
1986	237
1987	165
1988	130
1989	143
1990	130
1991	157
1992	148
1993	269
1994	141
1995	315
1996	270
1997	278
1998	142
1999	230
2000	200
2001	141
2002	70.0
2003	178
2004	108
2005	138
2006	188
2007	180
2008	294
2009	236
2010	168
2011	307
2012	73.0
2013	131
2014	272
2015	250
2016	174
2017	194
2018	133
2019	304
2020	157
2021	91.0
2022	131
2023	159
2024	159
2025	122

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	1911–2025
Completeness	82.6% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1911–2025 holds no value: 1925 to 1944, 20 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1911 and is not continuous from it: 115 years separate the first value from the last, and 83% 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

3 automated snow stations sit inside this drainage area, weighing the snowpack rather than measuring how deep it is.

874

Fullest snowpack recorded at Vail Mountain, in 1983 (mm of water)

177

Thinnest, in 2026 (mm of water)

April

Month the pack is usually at its fullest

June

Month the pack has gone by, in half of years

Peak snowpack at Vail Mountain

Water years 1979–2026. 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	Vail Mountain (mm)
1979	724
1980	761
1981	367
1982	767
1983	874
1984	795
1985	632
1986	590
1987	414
1988	539
1989	504
1990	457
1991	579
1992	553
1993	832
1994	475
1995	749
1996	818
1997	795
1998	470
1999	346
2000	511
2001	458
2002	357
2003	584
2004	396
2005	465
2006	712
2007	450
2008	686
2009	667
2010	457
2011	760
2012	270
2013	375
2014	540
2015	342
2016	510
2017	480
2018	339
2019	499
2020	472
2021	334
2022	407
2023	512
2024	492
2025	384
2026	177

Read against the river

Vail Mountain and EAGLE RIVER AT RED CLIFF, CO. both sit in this drainage area, and their records overlap by 46 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 Eagle and what each holds
Gauge	Measures	Values	Record
EAGLE RIVER AT RED CLIFF, CO.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	324	1910–2026
HOMESTAKE CREEK NEAR RED CLIFF, CO.	catchment area, annual maximum river flow	73	1911–2026

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 — 14010003. 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
EAGLE RIVER AT RED CLIFF, 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
HOMESTAKE CREEK NEAR RED CLIFF, 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 4 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	2	no
Years spanned	117	yes, 20 or more
Values held	1,536	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-09063000.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), Eagle gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-eagle/

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 Eagle 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 confidence2025-06-03

Source: USGS — National Water Information System, USGS site 09063000, 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.