The monitoring network within this area

Hydrionis holds 770 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

770

Values held

1897–2026

Record spans

Gauges within the Middle Flint 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 FLINT RIVER AT GA 26, NEAR MONTEZUMA, GA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1897–2024.

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	FLINT RIVER AT GA 26, NEAR MONTEZUMA, GA (m³/s)
1897	2,747
1914	156
1915	447
1916	1,543
1917	824
1918	328
1919	1,277
1921	793
1922	1,362
1923	810
1924	464
1925	2,407
1926	646
1927	223
1928	1,130
1929	2,614
1930	654
1932	357
1933	538
1934	626
1935	351
1936	1,546
1937	592
1938	1,198
1939	985
1940	453
1941	178
1942	1,155
1943	1,385
1944	1,365
1945	677
1946	765
1947	821
1948	592
1950	348
1951	246
1952	1,028
1953	977
1955	382
1956	496
1957	736
1958	617
1959	818
1960	714
1961	1,665
1962	736
1963	875
1964	1,900
1966	1,189
1967	405
1968	722
1969	617
1970	968
1971	1,648
1972	733
1973	674
1974	589
1975	926
1976	646
1977	600
1978	1,090
1979	1,031
1980	830
1981	909
1982	697
1983	929
1985	677
1986	402
1987	708
1988	266
1989	399
1990	1,838
1991	510
1992	357
1994	3,851
1995	779
1996	1,042
1997	541
1998	1,549
1999	261
2000	191
2001	750
2002	187
2003	759
2004	442
2005	1,167
2006	237
2007	382
2008	239
2009	850
2011	300
2012	157
2013	586
2014	552
2015	379
2017	462
2018	648
2019	668
2020	1,017
2021	297
2022	1,014
2023	1,388
2024	1,249

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	1897–2024
Completeness	80.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	10 separate periods inside 1897–2024 hold no value. The longest runs from 1898 to 1913 — 16 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1897 and is not continuous from it: 128 years separate the first value from the last, and 80% 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 FLINT RIVER AT GA 26, NEAR MONTEZUMA, GA, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1905–2025.

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	FLINT RIVER AT GA 26, NEAR MONTEZUMA, GA (mm)
1905	313
1906	419
1907	341
1908	499
1909	447
1911	247
1912	626
1931	255
1932	347
1933	347
1934	340
1935	248
1936	657
1937	501
1938	373
1939	395
1940	372
1941	267
1942	426
1943	515
1944	532
1945	433
1946	482
1947	547
1948	673
1949	496
1950	285
1951	267
1952	408
1953	614
1954	246
1955	248
1956	336
1957	444
1958	406
1959	434
1960	464
1961	554
1962	447
1963	395
1964	727
1965	448
1966	535
1967	399
1968	326
1969	314
1970	350
1971	580
1972	405
1973	527
1974	457
1975	681
1976	438
1977	396
1978	382
1979	429
1980	425
1981	269
1982	424
1983	503
1984	386
1985	282
1986	240
1987	351
1988	214
1989	378
1990	405
1991	373
1992	413
1993	380
1994	657
1995	398
1996	404
1997	447
1998	530
1999	215
2000	172
2001	337
2002	218
2003	506
2004	335
2005	538
2006	214
2007	175
2008	218
2009	524
2010	411
2011	206
2012	140
2013	421
2014	363
2015	437
2016	392
2017	284
2018	423
2019	423
2020	668
2021	376
2022	373
2023	384
2024	518
2025	367

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	1905–2025
Completeness	84.3% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	2 separate periods inside 1905–2025 hold no value. The longest runs from 1913 to 1930 — 18 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1905 and is not continuous from it: 121 years separate the first value from the last, and 84% 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 Flint and what each holds
Gauge	Measures	Values	Record
FLINT RIVER AT GA 26, NEAR MONTEZUMA, GA	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	317	1897–2026
FLINT RIVER AT MONTEZUMA, GA	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	250	1897–2026
FLINT RIVER AT GA 32, NEAR OAKFIELD, GA	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	203	1925–2026

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 — 03130006. 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
FLINT RIVER AT GA 26, NEAR MONTEZUMA, GA	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
FLINT RIVER AT MONTEZUMA, GA	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
FLINT RIVER AT GA 32, NEAR OAKFIELD, GA	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	130	yes, 20 or more
Values held	770	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-02349605.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 Flint gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-middle-flint/

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 Flint 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 confidence2024-12-15

Source: USGS — National Water Information System, USGS site 02349605, 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.