The monitoring network within this area

Hydrionis holds 1,411 values from 5 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

1,411

Values held

1901–2026

Record spans

Gauges within the Mohawk huc8 subbasin

5 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 MOHAWK RIVER AT COHOES NY

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1913–2025.

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	MOHAWK RIVER AT COHOES NY (m³/s)
1913	2,803
1915	1,286
1916	3,256
1917	1,484
1919	991
1920	1,826
1922	1,597
1923	1,651
1924	2,025
1926	1,489
1927	1,552
1929	2,039
1930	1,090
1931	934
1932	1,161
1934	1,280
1935	1,730
1936	3,681
1937	1,385
1938	2,888
1940	1,784
1942	1,337
1944	1,303
1945	1,345
1946	1,651
1947	1,453
1948	2,342
1950	2,061
1951	2,189
1952	1,722
1953	1,671
1954	1,608
1955	1,458
1957	651
1958	1,124
1959	1,824
1960	2,359
1961	2,036
1962	1,753
1963	1,744
1964	4,049
1965	787
1966	926
1967	697
1968	1,580
1969	1,198
1970	1,597
1971	1,150
1972	1,645
1973	2,291
1975	2,101
1976	1,775
1977	3,171
1979	2,027
1980	2,653
1981	1,504
1983	2,033
1985	1,345
1986	2,599
1987	2,302
1989	1,025
1990	1,215
1992	1,141
1993	2,115
1994	1,608
1995	634
1996	3,738
1998	2,458
1999	1,155
2000	2,540
2001	2,124
2002	1,212
2003	1,860
2005	2,778
2006	2,730
2007	2,345
2008	1,838
2009	1,611
2010	1,979
2011	3,313
2012	1,246
2013	1,977
2014	1,339
2015	951
2016	1,045
2017	1,843
2018	1,410
2019	1,136
2020	1,920
2022	2,146
2023	985
2025	1,376

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	1913–2025
Completeness	81.4% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	21 separate periods inside 1913–2025 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1913 and is not continuous from it: 113 years separate the first value from the last, and 81% 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 WEST CANADA CREEK AT KAST BRIDGE 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. 1921–2025.

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	WEST CANADA CREEK AT KAST BRIDGE NY (mm)
1921	722
1922	929
1923	714
1924	828
1925	1,008
1926	981
1927	889
1928	890
1929	974
1930	738
1931	621
1932	934
1933	624
1934	612
1935	874
1936	921
1937	902
1938	839
1939	685
1940	770
1941	587
1942	744
1943	979
1944	654
1945	1,062
1946	715
1947	1,049
1948	842
1949	824
1950	883
1951	920
1952	777
1953	707
1954	831
1955	791
1956	826
1957	647
1958	642
1959	909
1960	714
1961	620
1962	675
1963	569
1964	568
1965	630
1966	652
1967	704
1968	866
1969	731
1970	659
1971	839
1972	1,227
1973	1,025
1974	918
1975	930
1976	1,123
1977	1,060
1978	739
1979	903
1980	693
1981	820
1982	769
1983	794
1984	927
1985	674
1986	1,010
1987	741
1988	614
1989	800
1990	1,098
1991	730
1992	945
1993	997
1994	945
1995	645
1996	983
1997	807
1998	766
1999	627
2000	961
2001	735
2002	858
2003	1,011
2004	861
2005	893
2006	1,201
2007	927
2008	1,117
2009	989
2010	890
2011	1,145
2012	738
2013	1,022
2014	932
2015	762
2016	764
2017	1,090
2018	942
2019	1,319
2020	705
2021	870
2022	923
2023	906
2024	867
2025	770

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	1921–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1921 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 Mohawk and what each holds
Gauge	Measures	Values	Record
WEST CANADA CREEK AT KAST BRIDGE NY	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	317	1913–2026
MOHAWK RIVER AT COHOES NY	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	313	1913–2026
MOHAWK RIVER NEAR LITTLE FALLS NY	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	299	1901–2026
MOHAWK RIVER BELOW DELTA DAM NEAR ROME NY	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	295	1927–2026
MOHAWK RIVER DIVERSION AT CRESCENT DAM NY	mean river flow, mean river flow, water year	187	1925–2025

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 — 02020004. 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
WEST CANADA CREEK AT KAST BRIDGE 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
MOHAWK RIVER AT COHOES 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
MOHAWK RIVER NEAR LITTLE 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
MOHAWK RIVER BELOW DELTA DAM NEAR ROME 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
MOHAWK RIVER DIVERSION AT CRESCENT DAM 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 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	5	yes, 3 or more
Years spanned	126	yes, 20 or more
Values held	1,411	yes, 1000 or more
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-01346000.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), Mohawk gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-mohawk/

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 Mohawk 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 confidence2025-03-17

Source: USGS — National Water Information System, USGS site 01346000, 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.