The monitoring network within this area

Hydrionis holds 766 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.

Gauges

766

Values held

1903–2026

Record spans

Gauges within the East Branch Delaware 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 EAST BRANCH DELAWARE RIVER AT FISHS EDDY NY

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1903–2024.

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	EAST BRANCH DELAWARE RIVER AT FISHS EDDY NY (m³/s)
1903	1,982
1913	920
1914	850
1915	589
1916	470
1917	513
1919	238
1920	861
1921	555
1923	538
1924	1,274
1925	674
1926	756
1927	714
1929	685
1930	297
1931	538
1932	496
1933	1,509
1934	340
1936	1,303
1937	629
1938	1,161
1940	1,005
1942	988
1943	657
1945	612
1946	521
1947	597
1948	1,223
1950	597
1951	1,218
1952	566
1954	345
1955	776
1957	234
1959	498
1960	674
1961	603
1962	572
1963	479
1964	558
1965	244
1966	186
1967	311
1968	374
1969	827
1970	351
1972	496
1973	821
1974	592
1976	530
1977	977
1978	804
1979	442
1980	793
1981	600
1982	385
1983	510
1984	699
1985	419
1986	850
1987	756
1988	408
1989	467
1990	697
1991	419
1993	425
1994	484
1995	194
1996	1,501
1998	470
1999	609
2000	297
2002	215
2003	569
2004	1,594
2005	1,843
2006	2,192
2007	513
2008	782
2010	564
2012	711
2013	345
2014	360
2015	229
2016	396
2017	360
2019	603
2020	490
2021	932
2023	286
2024	838

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	1903–2024
Completeness	76.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	21 separate periods inside 1903–2024 hold no value. The longest runs from 1904 to 1912 — 9 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1903 and is not continuous from it: 122 years separate the first value from the last, and 76% 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 BEAVER KILL AT COOKS FALLS NY, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1915–2025.

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	BEAVER KILL AT COOKS FALLS NY (mm)
1915	879
1916	872
1917	928
1918	665
1919	757
1920	1,019
1921	798
1922	699
1923	823
1924	795
1925	774
1926	765
1927	1,228
1928	917
1929	829
1930	497
1931	692
1932	806
1933	736
1934	751
1935	688
1936	800
1937	956
1938	1,065
1939	630
1940	853
1941	439
1942	928
1943	869
1944	472
1945	1,158
1946	650
1947	915
1948	800
1949	736
1950	908
1951	958
1952	928
1953	828
1954	698
1955	892
1956	795
1957	641
1958	772
1959	917
1960	788
1961	634
1962	549
1963	569
1964	506
1965	501
1966	542
1967	780
1968	703
1969	784
1970	772
1971	747
1972	1,085
1973	1,094
1974	967
1975	1,032
1976	984
1977	1,069
1978	791
1979	1,065
1980	519
1981	703
1982	670
1983	892
1984	800
1985	629
1986	856
1987	748
1988	555
1989	764
1990	1,004
1991	544
1992	759
1993	840
1994	857
1995	701
1996	1,347
1997	675
1998	882
1999	749
2000	982
2001	517
2002	745
2003	1,344
2004	1,039
2005	1,006
2006	1,054
2007	906
2008	1,118
2009	955
2010	852
2011	1,468
2012	861
2013	795
2014	813
2015	664
2016	547
2017	840
2018	1,321
2019	1,015
2020	913
2021	989
2022	835
2023	891
2024	843
2025	670

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	1915–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1915 to 2025 is held.
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 East Branch Delaware and what each holds
Gauge	Measures	Values	Record
BEAVER KILL AT COOKS FALLS NY	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	335	1914–2026
EAST BRANCH DELAWARE RIVER AT FISHS EDDY NY	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	256	1903–2026
LITTLE BEAVER KILL NR LIVINGSTON MANOR NY	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	171	1924–2026
E BR DELAWARE RIVER ABV READ CR AT FISHS EDDY NY	catchment area, annual maximum river flow	4	2002–2026

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 — 02040102. 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
BEAVER KILL AT COOKS FALLS NY	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
EAST BRANCH DELAWARE RIVER AT FISHS EDDY NY	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
LITTLE BEAVER KILL NR LIVINGSTON MANOR NY	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
E BR DELAWARE RIVER ABV READ CR AT FISHS EDDY NY	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	3	yes, 3 or more
Years spanned	124	yes, 20 or more
Values held	766	no
Distinct measurements	4	yes, 2 or more
Publishers measuring it	1	no
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/gauge-usgs-01420500.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), East Branch Delaware gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-east-branch-delaware/

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 East Branch Delaware 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 confidence2024-12-11

Source: USGS — National Water Information System, USGS site 01420500, 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.