The monitoring network within this area

Hydrionis holds 2,656 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

2,656

Values held

1903–2026

Record spans

Gauges within the Spanish Fork 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 SPANISH FORK AT CASTILLA, UT

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	SPANISH FORK AT CASTILLA, UT (m³/s)
1903	11.0
1904	11.8
1905	11.6
1906	25.7
1907	55.8
1908	9.00
1937	28.6
1938	19.7
1939	25.6
1940	15.3
1941	22.0
1942	17.8
1943	16.1
1944	26.1
1945	19.7
1946	18.3
1947	18.8
1948	18.8
1949	23.8
1950	19.2
1951	17.6
1952	102
1953	17.5
1954	17.6
1955	20.7
1956	19.5
1957	21.5
1958	24.9
1959	27.1
1960	18.6
1961	17.6
1962	29.2
1963	20.2
1964	21.1
1965	28.3
1966	18.7
1967	20.2
1968	21.2
1969	37.1
1970	45.0
1971	20.2
1972	17.2
1973	40.8
1974	28.1
1975	70.8
1976	19.9
1977	16.8
1978	26.8
1979	21.5
1980	34.5
1981	17.4
1982	43.6
1983	84.4
1984	142
1985	35.4
1986	35.1
1987	24.0
1988	17.1
1990	17.7
1993	35.4
1994	18.2
1995	37.7
1996	24.4
1997	31.1
1998	33.4
1999	26.9
2000	16.8
2001	30.3
2002	14.9
2003	14.5
2004	27.1
2005	43.0
2006	39.1
2007	17.2
2008	23.3
2009	26.4
2010	19.0
2011	51.5
2012	16.0
2013	21.6
2014	16.0
2015	16.2
2016	15.7
2017	20.3
2018	21.2
2019	67.1
2020	14.7
2021	37.9
2022	28.9
2023	57.5
2024	21.4

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	74.6% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	3 separate periods inside 1903–2024 hold no value. The longest runs from 1909 to 1936 — 28 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 75% 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 SPANISH FORK AT CASTILLA, 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. 1920–2025.

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	SPANISH FORK AT CASTILLA, UT (mm)
1920	149
1921	169
1922	189
1923	164
1924	115
1933	93.0
1934	42.0
1935	80.0
1936	111
1937	120
1938	112
1939	92.0
1940	89.0
1941	92.0
1942	117
1943	95.0
1944	113
1945	102
1946	115
1947	107
1948	105
1949	114
1950	122
1951	111
1952	241
1953	112
1954	94.0
1955	98.0
1956	99.0
1957	122
1958	129
1959	81.0
1960	89.0
1961	60.0
1962	103
1963	73.0
1964	92.0
1965	114
1966	100
1967	111
1968	123
1969	161
1970	113
1971	124
1972	106
1973	137
1974	131
1975	146
1976	114
1977	82.0
1978	120
1979	133
1980	160
1981	101
1982	179
1983	263
1984	264
1985	180
1986	197
1987	109
1988	111
1989	134
1990	118
1991	113
1992	128
1993	158
1994	110
1995	160
1996	145
1997	164
1998	179
1999	136
2000	101
2001	107
2002	108
2003	104
2004	123
2005	170
2006	164
2007	112
2008	132
2009	140
2010	124
2011	210
2012	117
2013	116
2014	107
2015	92.0
2016	91.0
2017	134
2018	98.0
2019	167
2020	105
2021	85.0
2022	87.0
2023	174
2024	156
2025	103

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	1920–2025
Completeness	92.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1920–2025 holds no value: 1925 to 1932, 8 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1920 and is not continuous from it: 106 years separate the first value from the last, and 92% 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

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

841

Fullest snowpack recorded at Clear Creek #1, in 2023 (mm of water)

153

Thinnest, in 2026 (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 Clear Creek #1

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	Clear Creek #1 (mm)
1979	588
1980	675
1981	279
1982	636
1983	633
1984	673
1985	528
1986	705
1987	236
1988	353
1989	440
1990	453
1991	441
1992	205
1993	619
1994	298
1995	531
1996	610
1997	770
1998	519
1999	386
2000	440
2001	315
2002	333
2003	399
2004	376
2005	640
2006	604
2007	222
2008	571
2009	546
2010	332
2011	657
2012	284
2013	340
2014	348
2015	230
2016	357
2017	619
2018	213
2019	598
2020	380
2021	306
2022	319
2023	841
2024	508
2025	346
2026	153

Why the snow is not read against the river here

These two series do not overlap in time: Peak snow water equivalent runs 1978–2026 and Mean river flow, water year runs 1908–1972.

Every gauge Hydrionis holds within this area

Gauges within the Spanish Fork and what each holds
Gauge	Measures	Values	Record
SPANISH FORK AT CASTILLA, UT	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	324	1903–2026
SPANISH FORK NEAR LAKE SHORE, UTAH	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	210	1909–2026
SPANISH FORK AT THISTLE, UTAH	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	206	1908–2026
HOBBLE CR NR SPRINGVILLE UTAH	catchment area, annual maximum river flow	43	1904–2026

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 — 16020202. 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
SPANISH FORK AT CASTILLA, 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
SPANISH FORK NEAR LAKE SHORE, 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
SPANISH FORK AT THISTLE, 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
HOBBLE CR NR SPRINGVILLE 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 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	3	yes, 3 or more
Years spanned	124	yes, 20 or more
Values held	2,656	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-10150500.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), Spanish Fork gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-spanish-fork/

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 Spanish Fork 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 confidence2024-11-15

Source: USGS — National Water Information System, USGS site 10150500, 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.