The monitoring network within this area

Hydrionis holds 1,007 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

1,007

Values held

1902–2026

Record spans

Gauges within the Upper Clinch, Tennessee, Virginia 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 CLINCH RIVER AT CLEVELAND, VA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1902–2025.

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	CLINCH RIVER AT CLEVELAND, VA (m³/s)
1902	631
1907	631
1918	609
1921	194
1922	273
1923	464
1924	323
1926	236
1928	147
1929	251
1930	157
1931	236
1932	331
1934	244
1935	323
1936	294
1937	248
1939	297
1940	637
1941	170
1942	204
1944	515
1945	281
1946	436
1947	430
1948	385
1950	442
1952	191
1953	453
1954	198
1955	439
1956	396
1957	878
1958	394
1959	222
1961	405
1963	770
1964	195
1965	331
1966	206
1967	388
1969	130
1971	464
1972	388
1973	580
1975	521
1976	161
1977	977
1978	600
1979	459
1980	175
1981	133
1982	229
1984	530
1985	283
1987	377
1988	68.8
1989	263
1990	215
1991	192
1993	294
1994	484
1995	262
1996	343
1997	276
1998	391
1999	142
2000	101
2001	439
2002	688
2003	385
2004	212
2006	203
2007	125
2008	203
2009	245
2011	286
2012	269
2013	391
2014	163
2015	510
2016	186
2017	447
2018	425
2019	405
2020	609
2021	351
2022	303
2023	394
2024	270
2025	612

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	1902–2025
Completeness	73.4% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	20 separate periods inside 1902–2025 hold no value. The longest runs from 1908 to 1917 — 10 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1902 and is not continuous from it: 124 years separate the first value from the last, and 73% 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 CLINCH RIVER ABOVE TAZEWELL, TN, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1920–2025.

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	CLINCH RIVER ABOVE TAZEWELL, TN (mm)
1920	674
1921	483
1922	596
1923	643
1924	605
1925	361
1926	565
1927	585
1928	575
1929	683
1930	251
1931	348
1932	547
1933	426
1934	399
1935	579
1936	577
1937	523
1938	491
1939	388
1940	292
1941	203
1942	492
1943	373
1944	501
1945	503
1946	419
1947	446
1948	466
1949	533
1950	649
1951	516
1952	435
1953	406
1954	306
1955	464
1956	547
1957	633
1958	512
1959	441
1960	366
1961	509
1962	553
1963	456
1964	441
1965	405
1966	449
1967	523
1968	370
1969	332
1970	430
1971	553
1972	741
1973	594
1974	658
1975	648
1976	414
1977	594
1978	494
1979	710
1980	392
1981	304
1982	574
1983	394
1984	488
1985	337
1986	337
1987	459
1988	226
1989	637
1990	565
1991	582
1992	363
1993	449
1994	631
1995	437
1996	700
1997	455
1998	571
1999	280
2000	256
2001	321
2002	437
2003	678
2004	624
2005	372
2006	379
2007	235
2008	253
2009	538
2010	430
2011	607
2012	499
2013	674
2014	457
2015	540
2016	348
2017	479
2018	697
2019	689
2020	766
2021	446
2022	471
2023	355
2024	413
2025	539

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	1920–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1920 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 Upper Clinch, Tennessee, Virginia and what each holds
Gauge	Measures	Values	Record
CLINCH RIVER AT CLEVELAND, VA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	355	1902–2026
CLINCH RIVER ABOVE TAZEWELL, TN	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	352	1919–2026
CLINCH RIVER AT SPEERS FERRY, VA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	300	1902–2026

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 — 06010205. 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
CLINCH RIVER AT CLEVELAND, VA	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
CLINCH RIVER ABOVE TAZEWELL, TN	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
CLINCH RIVER AT SPEERS FERRY, VA	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 5 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	125	yes, 20 or more
Values held	1,007	yes, 1000 or more
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-03524000.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), Upper Clinch, Tennessee, Virginia gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-upper-clinch-tennessee-virginia/

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 Upper Clinch, Tennessee, Virginia 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 confidence2025-02-16

Source: USGS — National Water Information System, USGS site 03524000, 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.