The monitoring network within this area

Hydrionis holds 919 values from 3 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

919

Values held

1806–2026

Record spans

Gauges within the Middle Allegheny-Redbank huc8 subbasin

3 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 Allegheny River at Kittanning, PA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1806–2022.

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	Allegheny River at Kittanning, PA (m³/s)
1806	7,334
1865	7,136
1873	6,145
1881	6,541
1883	6,938
1884	6,541
1885	2,308
1886	2,917
1887	4,927
1888	2,888
1889	2,517
1890	5,069
1891	5,975
1892	3,426
1893	4,106
1894	4,729
1895	3,087
1896	3,087
1897	2,973
1898	3,851
1900	2,464
1901	3,087
1902	5,409
1903	3,766
1904	5,069
1905	6,824
1906	1,994
1907	2,376
1908	5,182
1909	4,984
1910	4,163
1911	3,540
1912	4,786
1913	7,617
1914	4,672
1915	3,398
1916	0
1917	2,707
1918	5,012
1919	3,002
1920	5,918
1921	2,257
1922	1,841
1923	2,860
1924	2,917
1925	3,653
1926	3,115
1927	3,030
1935	2,144
1936	5,437
1937	4,927
1939	2,591
1940	3,370
1942	3,002
1944	2,254
1945	4,078
1946	4,304
1947	3,851
1948	4,106
1949	1,651
1950	2,973
1951	3,568
1952	4,078
1953	3,483
1954	2,209
1956	4,729
1957	2,973
1958	2,662
1959	5,607
1960	4,078
1961	3,171
1962	1,611
1963	2,888
1964	5,550
1965	2,127
1966	4,531
1968	3,228
1970	2,860
1971	2,633
1972	5,210
1973	2,073
1974	2,413
1975	3,030
1976	4,191
1977	2,693
1979	2,693
1980	1,812
1981	3,681
1982	2,888
1983	1,988
1984	3,285
1985	2,665
1986	3,511
1987	2,132
1988	1,580
1989	3,341
1990	2,917
1992	2,141
1993	2,415
1994	2,829
1996	4,814
1997	1,994
1998	3,256
1999	2,775
2000	1,940
2001	1,608
2002	2,430
2003	2,515
2004	4,701
2005	2,888
2007	3,936
2008	3,002
2009	2,718
2010	2,506
2011	3,540
2012	2,025
2013	2,002
2015	1,846
2017	3,794
2018	4,248
2019	2,820
2020	1,931
2021	1,880
2022	3,625

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	1806–2022
Completeness	57.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	18 separate periods inside 1806–2022 hold no value. The longest runs from 1807 to 1864 — 58 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1806 and is not continuous from it: 217 years separate the first value from the last, and 57% 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 Redbank Creek at St. Charles, PA, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1919–2024.

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	Redbank Creek at St. Charles, PA (mm)
1919	572
1922	377
1923	506
1924	627
1925	349
1926	612
1927	830
1928	665
1929	748
1930	351
1931	398
1932	427
1933	486
1934	307
1935	574
1936	624
1937	817
1938	505
1939	414
1940	557
1941	386
1942	587
1943	544
1944	455
1945	797
1946	488
1947	541
1948	615
1949	447
1950	791
1951	678
1952	618
1953	496
1954	562
1955	505
1956	822
1957	457
1958	571
1959	579
1960	438
1961	546
1962	415
1963	367
1964	554
1965	509
1966	531
1967	579
1968	478
1969	420
1970	686
1971	510
1972	936
1973	631
1974	658
1975	731
1976	545
1977	692
1978	604
1979	652
1980	616
1981	577
1982	544
1983	630
1984	758
1985	613
1986	724
1987	509
1988	353
1989	610
1990	876
1991	383
1992	617
1993	613
1994	763
1995	428
1996	1,056
1997	582
1998	457
1999	487
2000	504
2001	403
2002	625
2003	773
2004	1,008
2005	572
2006	711
2007	647
2008	595
2009	534
2010	426
2011	820
2012	584
2013	559
2014	592
2015	636
2016	444
2017	640
2018	997
2019	774
2020	561
2021	467
2022	575
2023	518
2024	607

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	1919–2024
Completeness	98.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1919–2024 holds no value: 1920 to 1921, 2 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1919 and is not continuous from it: 106 years separate the first value from the last, and 98% 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 Middle Allegheny-Redbank and what each holds
Gauge	Measures	Values	Record
Redbank Creek at St. Charles, PA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	361	1910–2026
Allegheny River at Kittanning, PA	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	326	1806–2026
Crooked Creek at Crooked Creek Dam near Ford City	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	232	1910–2026

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 — 05010006. 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
Redbank Creek at St. Charles, PA	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
Allegheny River at Kittanning, PA	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
Crooked Creek at Crooked Creek Dam near Ford City	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	221	yes, 20 or more
Values held	919	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-03032500.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), Middle Allegheny-Redbank gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-middle-allegheny-redbank/

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 Middle Allegheny-Redbank 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 confidence2024-04-12

Source: USGS — National Water Information System, USGS site 03032500, 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.