The monitoring network within this area

Hydrionis holds 2,328 values from 9 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

2,328

Values held

1904–2026

Record spans

Gauges within the Upper Great Miami, Indiana, Ohio huc8 subbasin

9 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 Mad River near Springfield OH

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1904–2025.

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	Mad River near Springfield OH (m³/s)
1904	194
1905	109
1913	1,569
1914	183
1915	147
1916	254
1917	125
1918	220
1919	147
1920	371
1921	228
1922	306
1923	107
1924	518
1925	147
1926	130
1927	283
1929	651
1930	228
1931	77.0
1932	221
1933	320
1934	158
1935	114
1936	213
1937	450
1938	237
1939	156
1940	151
1941	41.9
1942	93.4
1943	379
1944	274
1945	362
1946	178
1947	360
1948	510
1949	311
1950	328
1952	510
1953	180
1954	116
1955	136
1957	351
1958	331
1959	864
1960	117
1961	215
1962	245
1963	634
1964	368
1965	156
1966	123
1967	130
1968	250
1969	257
1970	294
1971	274
1972	134
1973	144
1974	129
1975	323
1976	127
1977	165
1979	264
1980	345
1981	219
1982	283
1983	137
1984	112
1985	132
1986	190
1988	104
1989	209
1990	186
1992	169
1993	152
1994	198
1995	227
1996	253
1997	265
1998	303
1999	142
2000	218
2001	135
2003	156
2005	351
2006	133
2007	303
2008	279
2009	79.6
2010	166
2011	236
2013	118
2015	150
2017	162
2018	377
2019	270
2020	252
2021	142
2022	249
2023	258
2024	185
2025	257

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	1904–2025
Completeness	85.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	12 separate periods inside 1904–2025 hold no value. The longest runs from 1906 to 1912 — 7 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1904 and is not continuous from it: 122 years separate the first value from the last, and 85% 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 Loramie Creek at Lockington OH, 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	Loramie Creek at Lockington OH (mm)
1921	333
1922	339
1923	234
1924	363
1925	170
1926	360
1927	397
1928	231
1929	345
1930	266
1931	120
1932	244
1933	361
1934	81.0
1935	125
1936	171
1937	456
1938	297
1939	234
1940	191
1941	98.0
1942	210
1943	301
1944	195
1945	399
1946	162
1947	321
1948	389
1949	310
1950	550
1951	341
1952	343
1953	191
1954	123
1955	245
1956	211
1957	396
1958	404
1959	326
1960	137
1961	294
1962	202
1963	171
1964	231
1965	177
1966	178
1967	346
1968	255
1969	249
1970	225
1971	184
1972	478
1973	420
1974	324
1975	360
1976	200
1977	184
1978	292
1979	451
1980	309
1981	270
1982	386
1983	256
1984	321
1985	290
1986	393
1987	193
1988	108
1989	350
1990	555
1991	241
1992	312
1993	519
1994	203
1995	385
1996	449
1997	293
1998	304
1999	179
2000	194
2001	291
2002	295
2003	586
2004	273
2005	523
2006	409
2007	440
2008	508
2009	208
2010	245
2011	706
2012	208
2013	479
2014	338
2015	513
2016	209
2017	434
2018	526
2019	529
2020	428
2021	333
2022	366
2023	193
2024	254
2025	256

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 Upper Great Miami, Indiana, Ohio and what each holds
Gauge	Measures	Values	Record
Loramie Creek at Lockington OH	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	322	1913–2026
Great Miami River at Taylorsville OH	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	317	1913–2026
Stillwater River at Pleasant Hill OH	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	315	1913–2026
Great Miami River at Sidney OH	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	314	1913–2026
Stillwater River at Englewood OH	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	302	1913–2026
Mad River near Urbana OH	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	265	1925–2026
Mad River near Springfield OH	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	218	1904–2026
Mad River near Dayton OH	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	217	1913–2026
Buck Creek at Springfield OH	catchment area, annual maximum river flow	58	1913–2026

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 — 05080001. 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
Loramie Creek at Lockington OH	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
Great Miami River at Taylorsville OH	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
Stillwater River at Pleasant Hill OH	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
Great Miami River at Sidney OH	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
Stillwater River at Englewood OH	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
Mad River near Urbana OH	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
Mad River near Springfield OH	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
Mad River near Dayton OH	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
Buck Creek at Springfield OH	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	9	yes, 3 or more
Years spanned	123	yes, 20 or more
Values held	2,328	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-03262000.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 Great Miami, Indiana, Ohio gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-upper-great-miami-indiana-ohio/

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 Great Miami, Indiana, Ohio 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 confidence2025-04-06

Source: USGS — National Water Information System, USGS site 03262000, 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.