The monitoring network within this area

Hydrionis holds 1,006 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

1,006

Values held

1910–2026

Record spans

Gauges within the Utah Lake 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 AMERICAN FK AB UPPER POWERPLANT NR AMERICAN FK, UT

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1927–2025.

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	AMERICAN FK AB UPPER POWERPLANT NR AMERICAN FK, UT (m³/s)
1927	12.1
1928	9.60
1929	9.23
1930	5.47
1931	3.51
1932	8.89
1933	8.50
1934	1.84
1935	8.66
1936	9.49
1937	9.80
1938	9.00
1939	5.38
1940	5.95
1941	8.07
1942	7.50
1943	5.89
1944	12.2
1945	8.83
1946	8.92
1947	11.3
1948	12.9
1949	10.4
1950	10.8
1951	18.3
1952	15.0
1954	7.73
1955	8.27
1956	9.74
1957	14.4
1958	17.7
1959	5.75
1960	8.30
1961	2.38
1962	10.7
1963	8.30
1964	11.5
1965	12.5
1966	12.7
1967	12.1
1968	11.9
1969	14.6
1970	8.64
1971	10.3
1972	7.28
1973	12.1
1974	9.03
1975	16.6
1976	5.44
1977	3.23
1978	16.1
1979	13.1
1980	15.0
1981	6.71
1982	16.4
1986	16.8
1987	4.93
1988	3.77
1989	3.82
1990	4.90
1991	7.48
1992	3.20
1994	7.31
2012	3.31
2013	3.06
2014	6.57
2015	3.88
2016	8.64
2017	12.1
2018	3.60
2019	12.3
2020	5.41
2021	2.19
2022	4.13
2023	22.7
2024	11.0
2025	4.87

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	1927–2025
Completeness	77.8% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	4 separate periods inside 1927–2025 hold no value. The longest runs from 1995 to 2011 — 17 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1927 and is not continuous from it: 99 years separate the first value from the last, and 78% 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 AMERICAN FK AB UPPER POWERPLANT NR AMERICAN FK, 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. 1927–2025.

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	AMERICAN FK AB UPPER POWERPLANT NR AMERICAN FK, UT (mm)
1927	511
1928	354
1929	412
1930	262
1931	169
1932	399
1933	286
1934	122
1935	320
1936	447
1937	434
1938	412
1939	276
1940	225
1941	363
1942	361
1943	324
1944	372
1945	445
1946	370
1947	418
1948	413
1949	457
1950	455
1951	434
1952	583
1953	356
1954	258
1955	300
1956	352
1957	362
1958	446
1959	229
1960	270
1961	123
1962	406
1963	287
1964	363
1965	457
1966	309
1967	482
1968	422
1969	642
1970	321
1971	376
1972	350
1973	463
1974	328
1975	551
1976	284
1977	130
1978	540
1979	353
1980	586
1981	263
1982	661
1983	754
1984	651
1985	443
1986	740
1987	238
1988	183
1989	209
1990	213
1991	271
1992	182
1993	613
1994	261
1995	628
1996	432
1997	560
1998	613
1999	412
2000	294
2001	273
2002	245
2003	223
2004	270
2012	218
2013	140
2014	187
2015	169
2016	243
2017	426
2018	138
2019	451
2020	202
2021	113
2022	157
2023	640
2024	380
2025	190

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	1927–2025
Completeness	92.9% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1927–2025 holds no value: 2005 to 2011, 7 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1927 and is not continuous from it: 99 years separate the first value from the last, and 93% 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

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

1,225

Fullest snowpack recorded at Timpanogos Divide, in 2023 (mm of water)

210

Thinnest, in 2018 (mm of water)

March

Month the pack is usually at its fullest

June

Month the pack has gone by, in half of years

Peak snowpack at Timpanogos Divide

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	Timpanogos Divide (mm)
1979	750
1980	998
1981	412
1982	989
1983	757
1984	701
1985	612
1986	995
1987	259
1988	254
1989	490
1990	554
1991	383
1992	258
1993	952
1994	421
1995	665
1996	529
1997	971
1998	623
1999	433
2000	445
2001	269
2002	339
2003	251
2004	505
2005	1,018
2006	720
2007	305
2008	693
2009	624
2010	480
2011	1,171
2012	339
2013	328
2014	292
2015	259
2016	392
2017	782
2018	210
2019	777
2020	395
2021	292
2022	337
2023	1,225
2024	488
2025	444
2026	277

Why the snow is not read against the river here

AMERICAN FK AB UPPER POWERPLANT NR AMERICAN FK, UT measures a powerplant intake, not a natural channel. What passes through it is an operating decision — how much was diverted, and when — so comparing it with what the sky or the mountain delivered would describe the operator rather than the hydrology.

Every gauge Hydrionis holds within this area

Gauges within the Utah Lake and what each holds
Gauge	Measures	Values	Record
AMERICAN FK AB UPPER POWERPLANT NR AMERICAN FK, UT	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	297	1927–2026
SUMMIT CREEK NEAR SANTAQUIN, UTAH	catchment area, annual maximum river flow	14	1910–2026

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 — 16020201. 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
AMERICAN FK AB UPPER POWERPLANT NR AMERICAN FK, 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
SUMMIT CREEK NEAR SANTAQUIN, UTAH	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	1	no
Years spanned	117	yes, 20 or more
Values held	1,006	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-10164500.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), Utah Lake gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-utah-lake/

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 Utah Lake 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 10164500, 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.