The monitoring network within this area

Hydrionis holds 460 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

460

Values held

1906–2026

Record spans

Gauges within the North Fork Feather 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 NF FEATHER R A PULGA CA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1936–2025.

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	NF FEATHER R A PULGA CA (m³/s)
1936	1,087
1937	261
1938	104
1940	1,586
1941	906
1942	951
1943	844
1944	193
1945	496
1947	496
1948	428
1949	186
1950	473
1952	660
1953	1,220
1954	631
1955	2,050
1957	920
1958	963
1959	230
1960	971
1961	129
1962	348
1963	1,555
1964	2,067
1966	131
1967	586
1968	340
1969	1,328
1970	1,586
1971	620
1972	159
1973	377
1974	1,206
1975	268
1976	13.9
1977	3.51
1978	507
1979	157
1980	1,283
1982	974
1983	1,141
1984	74.5
1986	2,489
1987	257
1989	770
1991	1,416
1992	114
1993	595
1994	5.89
1995	1,846
1997	2,973
1998	637
1999	756
2000	779
2001	33.7
2002	218
2004	745
2005	702
2007	239
2008	9.03
2009	493
2010	157
2011	555
2012	549
2014	175
2016	816
2017	2,231
2018	790
2019	623
2021	60.3
2023	960
2024	348
2025	1,195

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	1936–2025
Completeness	82.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	16 separate periods inside 1936–2025 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1936 and is not continuous from it: 90 years separate the first value from the last, and 82% of the years between them are held. The span is not the record.
Last read from the publisher	2026-08-31
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 NF FEATHER R NR PRATTVILLE CA, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1906–2024.

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	NF FEATHER R NR PRATTVILLE CA (mm)
1906	924
1907	1,198
1908	633
1909	1,015
1910	690
1911	942
1912	503
1913	563
1914	935
1915	826
1916	889
1917	799
1918	517
1919	576
1920	376
1921	767
1922	703
1923	498
1924	412
1925	412
1926	491
1927	296
1928	396
1929	790
1930	546
1931	397
1932	227
1933	350
1934	367
1935	528
1936	432
1937	121
1938	572
1939	34.0
1940	234
1941	283
1942	344
1943	163
1944	58.0
1945	118
1946	186
1947	96.0
1948	81.0
1949	83.0
1950	95.0
1951	116
1952	417
1953	212
1954	323
1955	18.0
1956	288
1957	120
1958	251
1959	16.0
1960	16.0
1961	16.0
1962	15.0
1963	16.0
1964	19.0
1965	25.0
1966	24.0
1967	25.0
1968	25.0
1969	27.0
1970	26.0
1971	25.0
1972	25.0
1973	27.0
1974	36.0
1975	25.0
1976	26.0
1977	17.0
1978	29.0
1979	27.0
1980	25.0
1981	26.0
1982	24.0
1983	41.0
1984	79.0
1985	25.0
1986	26.0
1987	26.0
1988	26.0
1989	27.0
1990	26.0
1991	25.0
1992	26.0
1993	25.0
1994	25.0
1995	44.0
1996	233
1997	262
1998	27.0
1999	26.0
2000	28.0
2001	28.0
2002	26.0
2003	26.0
2004	26.0
2005	26.0
2006	90.0
2007	27.0
2008	27.0
2009	27.0
2010	28.0
2011	29.0
2012	38.0
2013	30.0
2014	31.0
2015	30.0
2016	41.0
2017	373
2018	34.0
2019	59.0
2020	32.0
2021	144
2022	33.0
2023	129
2024	136

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	1906–2024
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1906 to 2024 is held.
Last read from the publisher	2026-08-24
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 North Fork Feather and what each holds
Gauge	Measures	Values	Record
NF FEATHER R A PULGA CA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	238	1912–2026
NF FEATHER R NR PRATTVILLE CA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	222	1906–2026

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 — 18020121. 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
NF FEATHER R A PULGA CA	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	2026-08-26
NF FEATHER R NR PRATTVILLE CA	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	2026-08-26

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	2	no
Years spanned	121	yes, 20 or more
Values held	460	no
Distinct measurements	4	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-11404500.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), North Fork Feather gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-north-fork-feather/

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 North Fork Feather 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 confidence2025-02-04

Source: USGS — National Water Information System, USGS site 11404500, 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 31 August 2026.