The monitoring network within this area

Hydrionis holds 2,236 values from 3 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.

3

Gauges

2,236

Values held

1909–2026

Record spans

Gauges within the Bruneau huc8 subbasin

3 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 BRUNEAU RIVER NR HOT SPRING ID

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1910–2025.

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	BRUNEAU RIVER NR HOT SPRING ID (m³/s)
1910	184
1944	56.9
1945	82.4
1946	56.1
1947	34.8
1948	45.6
1949	87.8
1950	65.4
1951	51.5
1952	104
1953	60.9
1954	26.1
1955	28.6
1956	72.8
1957	116
1958	60.3
1959	26.2
1960	44.5
1961	21.1
1962	91.2
1963	170
1964	45.9
1966	19.9
1967	126
1968	49.0
1969	66.3
1970	77.3
1971	130
1972	75.9
1973	52.7
1974	55.8
1975	141
1976	60.9
1977	37.9
1978	42.8
1979	72.8
1980	55.5
1981	23.1
1982	69.1
1983	99.7
1984	194
1985	57.2
1986	107
1987	25.5
1988	27.5
1989	57.2
1990	26.3
1991	34.8
1992	11.8
1993	88.9
1994	34.0
1995	94.6
1996	67.1
1997	113
1998	75.3
1999	61.7
2001	28.6
2002	36.2
2003	45.9
2004	47.3
2005	159
2006	96.6
2008	54.9
2009	45.0
2010	71.9
2011	138
2012	26.6
2013	137
2014	26.0
2015	45.9
2016	81.6
2017	164
2018	41.1
2019	117
2020	45.6
2021	15.8
2022	32.6
2023	77.6
2024	62.0
2025	33.1

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	1910–2025
Completeness	69.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	4 separate periods inside 1910–2025 hold no value. The longest runs from 1911 to 1943 — 33 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1910 and is not continuous from it: 116 years separate the first value from the last, and 69% 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 BRUNEAU RIVER NR HOT SPRING ID, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1910–2025.

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	BRUNEAU RIVER NR HOT SPRING ID (mm)
1910	69.0
1911	51.0
1912	73.0
1913	50.0
1914	66.0
1944	49.0
1945	67.0
1946	47.0
1947	34.0
1948	39.0
1949	56.0
1950	59.0
1951	55.0
1952	75.0
1953	45.0
1954	23.0
1955	26.0
1956	49.0
1957	62.0
1958	47.0
1959	23.0
1960	36.0
1961	20.0
1962	59.0
1963	51.0
1964	52.0
1965	61.0
1966	20.0
1967	37.0
1968	27.0
1969	55.0
1970	60.0
1971	102
1972	75.0
1973	45.0
1974	49.0
1975	86.0
1976	52.0
1977	25.0
1978	47.0
1979	50.0
1980	56.0
1981	20.0
1982	66.0
1983	72.0
1984	131
1985	48.0
1986	67.0
1987	21.0
1988	28.0
1989	49.0
1990	26.0
1991	29.0
1992	14.0
1993	54.0
1994	23.0
1995	64.0
1996	55.0
1997	65.0
1998	62.0
1999	48.0
2000	25.0
2001	20.0
2002	30.0
2003	26.0
2004	32.0
2005	57.0
2006	66.0
2007	24.0
2008	35.0
2009	44.0
2010	43.0
2011	91.0
2012	22.0
2013	23.0
2014	20.0
2015	25.0
2016	65.0
2017	90.0
2018	28.0
2019	71.0
2020	38.0
2021	18.0
2022	29.0
2023	53.0
2024	49.0
2025	33.0

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	1910–2025
Completeness	75.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1910–2025 holds no value: 1915 to 1943, 29 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1910 and is not continuous from it: 116 years separate the first value from the last, and 75% 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.

636

Fullest snowpack recorded at Seventysix Creek, in 1984 (mm of water)

78

Thinnest, in 1992 (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 Seventysix Creek

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	Seventysix Creek (mm)
1979	382
1980	274
1981	82.0
1982	457
1983	428
1984	636
1985	272
1986	339
1987	114
1988	135
1989	316
1990	211
1991	156
1992	78.0
1993	373
1994	165
1995	273
1996	328
1997	383
1998	318
1999	278
2000	306
2001	166
2002	313
2003	158
2004	292
2005	226
2006	428
2007	157
2008	280
2009	201
2010	205
2011	259
2012	209
2013	159
2014	152
2015	167
2016	234
2017	387
2018	112
2019	392
2020	259
2021	190
2022	137
2023	368
2024	351
2025	323
2026	85.0

Read against the river

Seventysix Creek and BRUNEAU RIVER NR HOT SPRING ID 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 Bruneau and what each holds
Gauge	Measures	Values	Record
BRUNEAU RIVER NR HOT SPRING ID	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	292	1909–2026
BRUNEAU RV AT ROWLAND, NV	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	228	1913–2026
EF BRUNEAU RIVER NR HOT SPRING ID	catchment area, annual maximum river flow	26	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 — 17050102. 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
BRUNEAU RIVER NR HOT SPRING ID	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
BRUNEAU RV AT ROWLAND, NV	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
EF BRUNEAU RIVER NR HOT SPRING ID	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	118	yes, 20 or more
Values held	2,236	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-13168500.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), Bruneau gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-bruneau/

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 Bruneau 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 confidence2025-05-12

Source: USGS — National Water Information System, USGS site 13168500, 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.