The monitoring network within this area

Hydrionis holds 2,940 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

2,940

Values held

1909–2026

Record spans

Gauges within the San Rafael 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 FERRON CREEK (UPPER STATION) NEAR FERRON, UT

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1912–2025.

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	FERRON CREEK (UPPER STATION) NEAR FERRON, UT (m³/s)
1912	27.6
1913	42.2
1914	48.4
1915	18.1
1916	15.9
1917	27.8
1918	14.4
1919	25.5
1920	59.5
1921	36.8
1922	31.4
1923	19.8
1948	36.8
1949	35.1
1950	15.9
1951	43.0
1952	118
1953	90.0
1954	28.9
1955	32.8
1956	25.0
1957	28.3
1958	29.4
1959	6.06
1960	26.8
1961	28.9
1962	17.8
1963	30.9
1964	26.8
1965	59.5
1966	51.5
1967	13.1
1968	17.6
1969	21.8
1970	19.3
1971	14.1
1972	10.1
1973	86.1
1974	23.4
1975	30.0
1976	7.87
1977	12.8
1978	14.9
1979	23.7
1980	24.3
1981	9.85
1982	17.1
1983	28.1
1984	55.8
1986	30.3
1987	14.0
1988	10.7
1989	22.1
1990	7.93
1991	17.6
1992	10.9
1993	21.4
1994	17.9
1995	24.9
1996	14.5
1997	27.5
1998	16.2
1999	43.3
2000	15.4
2001	16.0
2002	7.48
2003	19.7
2004	10.4
2005	23.4
2006	25.3
2008	71.4
2009	21.5
2010	31.1
2011	31.7
2012	5.61
2013	61.2
2014	49.6
2015	11.7
2016	20.9
2017	24.4
2018	8.47
2019	27.4
2020	11.5
2021	15.5
2022	13.5
2023	21.6
2024	15.1
2025	9.80

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	1912–2025
Completeness	77.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	3 separate periods inside 1912–2025 hold no value. The longest runs from 1924 to 1947 — 24 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1912 and is not continuous from it: 114 years separate the first value from the last, and 77% 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 FERRON CREEK (UPPER STATION) NEAR FERRON, 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. 1912–2025.

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	FERRON CREEK (UPPER STATION) NEAR FERRON, UT (mm)
1912	204
1913	151
1914	253
1915	147
1916	221
1917	270
1918	142
1919	142
1920	186
1921	265
1922	211
1948	113
1949	217
1950	122
1951	146
1952	333
1953	136
1954	95.0
1955	98.0
1956	120
1957	237
1958	241
1959	70.0
1960	115
1961	85.0
1962	219
1963	120
1964	124
1965	238
1966	98.0
1967	132
1968	147
1969	211
1970	168
1971	147
1972	102
1973	182
1974	134
1975	221
1976	87.0
1977	41.0
1978	161
1979	195
1980	251
1981	98.0
1982	220
1983	339
1984	359
1985	182
1986	220
1987	116
1988	105
1989	85.0
1990	90.0
1991	121
1992	90.0
1993	197
1994	84.0
1995	214
1996	148
1997	231
1998	187
1999	163
2000	113
2001	141
2002	77.0
2003	123
2004	130
2005	207
2006	212
2007	106
2008	154
2009	152
2010	112
2011	288
2012	74.0
2013	87.0
2014	150
2015	107
2016	112
2017	208
2018	56.0
2019	240
2020	116
2021	51.0
2022	99.0
2023	216
2024	136
2025	96.0

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	1912–2025
Completeness	78.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1912–2025 holds no value: 1923 to 1947, 25 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1912 and is not continuous from it: 114 years separate the first value from the last, and 78% 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

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

789

Fullest snowpack recorded at Buck Flat, in 1984 (mm of water)

157

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 Buck Flat

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	Buck Flat (mm)
1979	548
1980	692
1981	219
1982	717
1983	780
1984	789
1985	461
1986	589
1987	279
1988	323
1989	399
1990	255
1991	311
1992	339
1993	637
1994	275
1995	565
1996	615
1997	744
1998	540
1999	372
2000	413
2001	338
2002	327
2003	337
2004	353
2005	476
2006	639
2007	226
2008	465
2009	447
2010	360
2011	581
2012	241
2013	315
2014	371
2015	317
2016	337
2017	534
2018	219
2019	550
2020	433
2021	280
2022	301
2023	677
2024	398
2025	334
2026	157

Why the snow is not read against the river here

Peak snow water equivalent and Mean river flow, water year overlap for only 5 years at these subjects. A relationship read off a span that short is reading the weather of a few seasons.

Every gauge Hydrionis holds within this area

Gauges within the San Rafael and what each holds
Gauge	Measures	Values	Record
FERRON CREEK (UPPER STATION) NEAR FERRON, UT	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	306	1911–2026
SAN RAFAEL RIVER NEAR GREEN RIVER, UT	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	297	1909–2026
COTTONWOOD CREEK NEAR ORANGEVILLE, UTAH	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	227	1909–2026
HUNTINGTON CREEK NR HUNTINGTON, UTAH	catchment area, annual maximum river flow	72	1909–2026

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 — 14060009. 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
FERRON CREEK (UPPER STATION) NEAR FERRON, 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
SAN RAFAEL RIVER NEAR GREEN RIVER, 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
COTTONWOOD CREEK NEAR ORANGEVILLE, 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
HUNTINGTON CREEK NR HUNTINGTON, 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	4	yes, 3 or more
Years spanned	118	yes, 20 or more
Values held	2,940	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-09326500.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), San Rafael gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-san-rafael/

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 San Rafael 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 09326500, 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.