The monitoring network within this area

Hydrionis holds 2,705 values from 4 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.

4

Gauges

2,705

Values held

1914–2026

Record spans

Gauges within the Upper Sevier huc8 subbasin

4 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 SEVIER RIVER NEAR KINGSTON, UT

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1917–2024.

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	SEVIER RIVER NEAR KINGSTON, UT (m³/s)
1917	25.7
1918	28.3
1919	14.7
1920	35.7
1921	25.2
1922	41.3
1923	25.7
1924	14.2
1925	18.4
1928	15.2
1930	28.3
1931	4.93
1933	20.8
1934	5.21
1935	9.17
1936	30.6
1937	27.3
1938	85.0
1939	28.3
1940	27.9
1941	35.7
1942	22.4
1943	29.4
1944	17.1
1945	21.2
1946	9.34
1947	16.3
1948	13.0
1949	26.3
1950	7.42
1951	15.5
1952	23.9
1953	12.0
1954	6.43
1955	5.21
1957	12.8
1958	19.7
1959	9.23
1960	6.77
1961	19.3
1962	33.4
1963	6.99
1964	13.1
1965	10.4
1966	15.4
1967	29.4
1968	16.3
1969	21.5
1971	11.2
1973	34.3
1974	12.9
1975	8.41
1976	11.7
1978	8.78
1979	25.2
1980	27.3
1982	11.4
1983	45.0
1984	27.8
1985	18.7
1986	18.0
1987	11.9
1988	10.9
1990	4.96
1992	4.70
1993	27.6
1994	7.36
1995	26.8
1996	7.87
1997	15.9
1998	29.4
2000	6.20
2001	13.9
2002	5.92
2003	22.7
2005	51.8
2006	10.4
2008	7.08
2009	9.49
2010	14.0
2011	35.7
2013	21.8
2014	24.0
2015	5.75
2016	12.0
2017	13.9
2018	16.3
2019	25.1
2020	10.9
2021	24.8
2022	5.89
2023	35.7
2024	13.2

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	1917–2024
Completeness	86.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	14 separate periods inside 1917–2024 hold no value. The longest runs from 1926 to 1927 — 2 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1917 and is not continuous from it: 108 years separate the first value from the last, and 86% 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 SEVIER RIVER NEAR KINGSTON, UT, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1915–2025.

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	SEVIER RIVER NEAR KINGSTON, UT (mm)
1915	59.0
1916	84.0
1917	70.0
1918	45.0
1919	37.0
1920	72.0
1921	67.0
1922	109
1923	75.0
1924	36.0
1925	32.0
1926	28.0
1927	35.0
1928	29.0
1929	37.0
1930	25.0
1931	13.0
1932	47.0
1933	25.0
1934	15.0
1935	26.0
1936	26.0
1937	56.0
1938	56.0
1939	34.0
1940	27.0
1941	69.0
1942	62.0
1943	36.0
1944	46.0
1945	38.0
1946	28.0
1947	37.0
1948	32.0
1949	48.0
1950	26.0
1951	20.0
1952	56.0
1953	22.0
1954	23.0
1955	17.0
1956	15.0
1957	25.0
1958	52.0
1959	18.0
1960	15.0
1961	18.0
1962	31.0
1963	14.0
1964	18.0
1965	32.0
1966	28.0
1967	39.0
1968	39.0
1969	67.0
1970	26.0
1971	25.0
1972	23.0
1973	64.0
1974	23.0
1975	25.0
1976	22.0
1977	14.0
1978	25.0
1979	58.0
1980	75.0
1981	32.0
1982	40.0
1983	96.0
1984	55.0
1985	49.0
1986	37.0
1987	36.0
1988	38.0
1989	19.0
1990	16.0
1991	16.0
1992	21.0
1993	66.0
1994	27.0
1995	73.0
1996	25.0
1997	35.0
1998	58.0
1999	32.0
2000	26.0
2001	29.0
2002	16.0
2003	15.0
2004	20.0
2005	115
2006	42.0
2007	21.0
2008	24.0
2009	26.0
2010	42.0
2011	105
2012	27.0
2013	26.0
2014	21.0
2015	19.0
2016	27.0
2017	38.0
2018	19.0
2019	62.0
2020	29.0
2021	18.0
2022	17.0
2023	79.0
2024	37.0
2025	16.0

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	1915–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1915 to 2025 is held.
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

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

732

Fullest snowpack recorded at Castle Valley, in 2005 (mm of water)

134

Thinnest, in 2025 (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 Castle Valley

Water years 1981–2026. 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	Castle Valley (mm)
1981	220
1982	396
1983	715
1984	470
1985	303
1986	335
1987	281
1988	321
1989	242
1990	202
1991	257
1992	322
1993	706
1994	257
1995	530
1996	267
1997	364
1998	446
1999	263
2000	310
2001	389
2002	157
2003	212
2004	329
2005	732
2006	306
2007	178
2008	427
2009	308
2010	462
2011	554
2012	205
2013	270
2014	179
2015	249
2016	327
2017	357
2018	181
2019	443
2020	371
2021	217
2022	229
2023	590
2024	329
2025	134
2026	141

Read against the river

Castle Valley and SEVIER RIVER AT HATCH, UT both sit in this drainage area, and their records overlap by 44 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 Upper Sevier and what each holds
Gauge	Measures	Values	Record
SEVIER RIVER NEAR KINGSTON, UT	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	365	1914–2026
SEVIER RIVER AT HATCH, UT	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	334	1914–2026
COMBINED FLOW SEVIER R AND E FK SEVIER R	burned area within 50 km, mean river flow, mean river flow, water year	155	1915–2019
SEVIER RIVER NEAR CIRCLEVILLE, UT	catchment area, annual maximum river flow	57	1915–2026

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 — 16030001. 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
SEVIER RIVER NEAR KINGSTON, UT	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
SEVIER RIVER AT HATCH, UT	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
COMBINED FLOW SEVIER R AND E FK SEVIER R	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
SEVIER RIVER NEAR CIRCLEVILLE, UT	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	4	yes, 3 or more
Years spanned	113	yes, 20 or more
Values held	2,705	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-10183500.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), Upper Sevier gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-upper-sevier/

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 Upper Sevier 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 confidence2024-11-27

Source: USGS — National Water Information System, USGS site 10183500, 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.