The monitoring network within this area

Hydrionis holds 390 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.

Gauges

390

Values held

1916–2026

Record spans

Gauges within the Coquille 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 SOUTH FORK COQUILLE RIVER AT POWERS, OR

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1916–2025.

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	SOUTH FORK COQUILLE RIVER AT POWERS, OR (m³/s)
1916	143
1918	283
1919	558
1921	286
1922	262
1923	250
1924	716
1926	566
1929	328
1931	166
1933	510
1934	205
1936	668
1937	430
1938	314
1939	343
1940	405
1941	439
1942	467
1943	274
1945	306
1946	314
1948	467
1949	377
1950	311
1951	340
1953	705
1954	272
1955	793
1957	513
1958	558
1959	600
1960	394
1961	513
1963	351
1964	583
1966	708
1967	399
1968	433
1969	586
1971	787
1972	626
1974	725
1975	388
1977	178
1979	257
1980	445
1981	940
1983	643
1984	496
1986	311
1987	371
1988	340
1990	549
1991	243
1992	166
1993	498
1995	682
1996	1,090
1998	262
2000	368
2001	276
2002	552
2003	464
2004	382
2005	725
2006	297
2007	450
2008	572
2010	300
2012	682
2014	274
2015	467
2017	513
2018	334
2019	487
2020	155
2021	399
2022	270
2023	396
2024	371
2025	841

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	1916–2025
Completeness	74.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	27 separate periods inside 1916–2025 hold no value. The longest runs from 1927 to 1928 — 2 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1916 and is not continuous from it: 110 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 SOUTH FORK COQUILLE RIVER AT POWERS, OR, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1917–2024.

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	SOUTH FORK COQUILLE RIVER AT POWERS, OR (mm)
1917	1,613
1918	1,168
1919	2,014
1920	1,645
1921	1,490
1922	1,588
1923	1,058
1924	1,374
1925	1,490
1929	1,083
1930	693
1931	1,247
1932	1,411
1933	1,930
1934	1,132
1935	1,235
1936	1,365
1937	1,930
1938	2,033
1939	1,043
1940	1,786
1941	1,540
1942	1,910
1943	1,316
1944	961
1945	2,197
1946	1,461
1947	1,330
1948	1,840
1949	1,132
1950	2,379
1951	2,028
1952	1,451
1953	2,473
1954	1,715
1955	2,069
1956	1,903
1957	1,659
1958	1,810
1959	1,304
1960	1,787
1961	1,944
1962	1,404
1963	1,680
1964	2,205
1965	1,204
1966	2,044
1967	1,506
1968	1,838
1969	1,595
1970	1,879
1971	2,293
1972	1,691
1973	2,038
1974	1,790
1975	1,816
1976	774
1977	1,207
1978	1,243
1979	1,465
1980	1,614
1981	1,847
1982	2,256
1983	2,446
1984	1,774
1985	955
1986	1,686
1987	1,502
1988	1,139
1989	1,147
1990	1,049
1991	1,086
1992	1,004
1993	1,652
1994	1,069
1995	2,189
1996	2,713
1997	1,333
1998	2,250
1999	1,924
2000	1,348
2001	994
2002	1,402
2003	1,322
2004	1,281
2005	1,623
2006	2,118
2007	1,375
2008	1,356
2009	1,197
2010	1,974
2011	1,441
2012	2,367
2013	726
2014	1,357
2015	1,367
2016	2,076
2017	2,118
2018	1,229
2019	1,436
2020	965
2021	1,481
2022	1,276
2023	1,702
2024	2,207

About this series

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	1917–2024
Completeness	97.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1917–2024 holds no value: 1926 to 1928, 3 years with no reading. It is drawn as a break in the line and is 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 97% 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

Every gauge Hydrionis holds within this area

Gauges within the Coquille and what each holds
Gauge	Measures	Values	Record
SOUTH FORK COQUILLE RIVER AT POWERS, OR	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	354	1916–2026
N FK COQUILLE R NR MYRTLE POINT, OR	catchment area, annual maximum river flow	36	1931–2026

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 — 17100305. 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
SOUTH FORK COQUILLE RIVER AT POWERS, OR	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
N FK COQUILLE R NR MYRTLE POINT, OR	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 3 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	111	yes, 20 or more
Values held	390	no
Distinct measurements	5	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-14325000.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), Coquille gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-coquille/

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 Coquille 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 confidence2025-03-16

Source: USGS — National Water Information System, USGS site 14325000, 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.