The monitoring network within this area

Hydrionis holds 988 values from 6 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

988

Values held

1910–2026

Record spans

Gauges within the Lower Pit huc8 subbasin

6 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 PIT R A BIG BEND CA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1914–2016.

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	PIT R A BIG BEND CA (m³/s)
1914	422
1915	167
1916	343
1917	456
1918	181
1919	250
1920	135
1921	243
1922	243
1923	113
1924	119
1925	222
1926	140
1927	244
1928	496
1929	114
1931	89.8
1932	266
1933	222
1934	100.0
1935	578
1936	470
1937	251
1939	113
1940	705
1941	547
1942	555
1943	515
1944	144
1945	107
1947	108
1948	176
1949	63.4
1950	76.2
1951	190
1952	496
1953	326
1954	136
1955	510
1957	278
1958	459
1959	186
1960	280
1961	26.3
1962	106
1964	47.0
1966	159
1967	377
1968	425
1969	453
1970	1,388
1971	419
1972	385
1973	175
1974	742
1975	173
1976	48.1
1977	20.4
1978	162
1979	167
1980	810
1981	23.0
1982	575
1983	439
1984	69.9
1986	1,240
1987	112
1989	561
1990	11.1
1991	87.2
1992	96.3
1993	722
1995	830
1996	680
1997	1,167
1998	337
1999	394
2000	164
2002	54.4
2003	374
2004	547
2005	280
2006	637
2007	40.2
2008	62.9
2009	88.9
2010	30.3
2011	213
2012	108
2014	48.4
2015	157
2016	294

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	1914–2016
Completeness	89.3% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	11 separate periods inside 1914–2016 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1914 and is not continuous from it: 103 years separate the first value from the last, and 89% 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 PIT R A BIG BEND 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. 1911–2024.

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	PIT R A BIG BEND CA (mm)
1911	324
1912	230
1913	230
1914	315
1915	245
1916	283
1917	289
1918	201
1919	222
1920	186
1921	252
1922	222
1923	172
1924	152
1925	176
1926	159
1927	228
1928	198
1929	156
1930	165
1931	134
1932	175
1933	147
1934	130
1935	199
1936	188
1937	207
1938	309
1939	157
1940	236
1941	245
1942	266
1943	268
1944	71.0
1945	22.0
1946	40.0
1947	12.0
1948	41.0
1949	14.0
1950	22.0
1951	39.0
1952	106
1953	35.0
1954	25.0
1955	30.0
1956	89.0
1957	30.0
1958	65.0
1959	10.0
1960	15.0
1961	11.0
1962	26.0
1963	48.0
1964	32.0
1965	55.0
1966	15.0
1967	39.0
1968	31.0
1969	75.0
1970	93.0
1971	83.0
1972	38.0
1973	26.0
1974	91.0
1975	41.0
1976	8.00
1977	7.00
1978	26.0
1979	10.0
1980	51.0
1981	30.0
1982	76.0
1983	104
1984	31.0
1985	7.00
1986	102
1987	14.0
1988	12.0
1989	32.0
1990	11.0
1991	11.0
1992	13.0
1993	59.0
1994	11.0
1995	121
1996	67.0
1997	61.0
1998	115
1999	57.0
2000	26.0
2001	13.0
2002	17.0
2003	30.0
2004	27.0
2005	53.0
2006	105
2007	16.0
2008	19.0
2009	22.0
2010	21.0
2011	66.0
2012	65.0
2013	53.0
2014	36.0
2015	41.0
2016	79.0
2018	49.0
2019	82.0
2020	35.0
2021	38.0
2022	37.0
2023	54.0
2024	65.0

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	1911–2024
Completeness	99.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1911–2024 holds no value: 2017. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1911 and is not continuous from it: 114 years separate the first value from the last, and 99% 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 Lower Pit and what each holds
Gauge	Measures	Values	Record
PIT R A BIG BEND CA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	366	1910–2026
PIT R BL PIT NO 4 DAM CA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	333	1923–2026
HAT C NR HAT CREEK CA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	263	1926–2026
BURNEY C A PARK AVENUE NR BURNEY CA	catchment area, annual maximum river flow	24	1912–2026
FALL R A FALL RIVER MILLS CA	catchment area	1	2026–2026
BURNEY C A BURNEY FALLS NR BURNEY CA	catchment area	1	2026–2026

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 — 18020003. 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
PIT R A BIG BEND 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	2026-10-02
PIT R BL PIT NO 4 DAM 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	2026-10-02
HAT C NR HAT CREEK 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	2026-10-02
BURNEY C A PARK AVENUE NR BURNEY 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	2026-10-02
FALL R A FALL RIVER MILLS 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	2026-10-02
BURNEY C A BURNEY FALLS NR BURNEY 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	2026-10-02

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	3	yes, 3 or more
Years spanned	117	yes, 20 or more
Values held	988	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-11363000.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), Lower Pit gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-lower-pit/

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 Lower Pit 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 confidence2016-03-15

Source: USGS — National Water Information System, USGS site 11363000, 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.